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/Problem01_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:51:39,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:51:39,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:51:39,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:51:39,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:51:39,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:51:39,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:51:39,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:51:39,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:51:39,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:51:39,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:51:39,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:51:39,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:51:39,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:51:39,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:51:39,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:51:39,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:51:39,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:51:39,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:51:39,308 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:51:39,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:51:39,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:51:39,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:51:39,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:51:39,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:51:39,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:51:39,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:51:39,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:51:39,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:51:39,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:51:39,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:51:39,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:51:39,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:51:39,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:51:39,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:51:39,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:51:39,336 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:51:39,354 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:51:39,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:51:39,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:51:39,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:51:39,360 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:51:39,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:51:39,360 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:51:39,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:51:39,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:51:39,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:51:39,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:51:39,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:51:39,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:51:39,363 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:51:39,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:51:39,363 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:51:39,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:51:39,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:51:39,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:51:39,364 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:51:39,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:51:39,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:51:39,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:51:39,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:51:39,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:51:39,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:51:39,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:51:39,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:51:39,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:51:39,636 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:51:39,657 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:51:39,661 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:51:39,663 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:51:39,663 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:51:39,664 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label20.c [2019-10-14 21:51:39,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d011aeee0/3feefb5ce50149c8bd3320e8df24cc67/FLAG8df39f1d5 [2019-10-14 21:51:40,285 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:51:40,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label20.c [2019-10-14 21:51:40,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d011aeee0/3feefb5ce50149c8bd3320e8df24cc67/FLAG8df39f1d5 [2019-10-14 21:51:40,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d011aeee0/3feefb5ce50149c8bd3320e8df24cc67 [2019-10-14 21:51:40,620 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:51:40,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:51:40,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:51:40,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:51:40,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:51:40,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:51:40" (1/1) ... [2019-10-14 21:51:40,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d289120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:40, skipping insertion in model container [2019-10-14 21:51:40,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:51:40" (1/1) ... [2019-10-14 21:51:40,641 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:51:40,700 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:51:41,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:51:41,229 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:51:41,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:51:41,387 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:51:41,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:41 WrapperNode [2019-10-14 21:51:41,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:51:41,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:51:41,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:51:41,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:51:41,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:41" (1/1) ... [2019-10-14 21:51:41,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:41" (1/1) ... [2019-10-14 21:51:41,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:41" (1/1) ... [2019-10-14 21:51:41,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:41" (1/1) ... [2019-10-14 21:51:41,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:41" (1/1) ... [2019-10-14 21:51:41,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:41" (1/1) ... [2019-10-14 21:51:41,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:41" (1/1) ... [2019-10-14 21:51:41,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:51:41,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:51:41,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:51:41,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:51:41,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:51:41,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:51:41,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:51:41,553 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:51:41,553 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:51:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:51:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:51:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:51:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:51:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:51:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:51:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:51:42,716 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:51:42,716 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:51:42,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:51:42 BoogieIcfgContainer [2019-10-14 21:51:42,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:51:42,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:51:42,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:51:42,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:51:42,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:51:40" (1/3) ... [2019-10-14 21:51:42,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b11d071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:51:42, skipping insertion in model container [2019-10-14 21:51:42,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:41" (2/3) ... [2019-10-14 21:51:42,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b11d071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:51:42, skipping insertion in model container [2019-10-14 21:51:42,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:51:42" (3/3) ... [2019-10-14 21:51:42,726 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label20.c [2019-10-14 21:51:42,735 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:51:42,743 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:51:42,754 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:51:42,783 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:51:42,784 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:51:42,784 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:51:42,784 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:51:42,784 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:51:42,784 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:51:42,785 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:51:42,785 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:51:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 21:51:42,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:51:42,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:42,818 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:42,820 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:42,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:42,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1090826438, now seen corresponding path program 1 times [2019-10-14 21:51:42,835 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:42,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21012274] [2019-10-14 21:51:42,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:42,836 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:42,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:43,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21012274] [2019-10-14 21:51:43,329 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:51:43,330 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:51:43,330 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913308558] [2019-10-14 21:51:43,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:51:43,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:43,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:51:43,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:51:43,363 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 5 states. [2019-10-14 21:51:44,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:44,911 INFO L93 Difference]: Finished difference Result 557 states and 956 transitions. [2019-10-14 21:51:44,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:51:44,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2019-10-14 21:51:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:44,948 INFO L225 Difference]: With dead ends: 557 [2019-10-14 21:51:44,948 INFO L226 Difference]: Without dead ends: 286 [2019-10-14 21:51:44,962 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:51:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-10-14 21:51:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 280. [2019-10-14 21:51:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2019-10-14 21:51:45,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 402 transitions. [2019-10-14 21:51:45,051 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 402 transitions. Word has length 78 [2019-10-14 21:51:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:45,052 INFO L462 AbstractCegarLoop]: Abstraction has 280 states and 402 transitions. [2019-10-14 21:51:45,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:51:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 402 transitions. [2019-10-14 21:51:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-14 21:51:45,060 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:45,060 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:51:45,061 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:45,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2093961699, now seen corresponding path program 1 times [2019-10-14 21:51:45,064 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:45,064 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906620242] [2019-10-14 21:51:45,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:45,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:45,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:45,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906620242] [2019-10-14 21:51:45,366 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:51:45,366 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:51:45,366 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87914355] [2019-10-14 21:51:45,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:51:45,372 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:45,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:51:45,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:51:45,374 INFO L87 Difference]: Start difference. First operand 280 states and 402 transitions. Second operand 9 states. [2019-10-14 21:51:46,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:46,928 INFO L93 Difference]: Finished difference Result 713 states and 1049 transitions. [2019-10-14 21:51:46,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:51:46,929 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2019-10-14 21:51:46,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:46,933 INFO L225 Difference]: With dead ends: 713 [2019-10-14 21:51:46,933 INFO L226 Difference]: Without dead ends: 439 [2019-10-14 21:51:46,935 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:51:46,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2019-10-14 21:51:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 421. [2019-10-14 21:51:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2019-10-14 21:51:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 590 transitions. [2019-10-14 21:51:46,981 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 590 transitions. Word has length 88 [2019-10-14 21:51:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:46,981 INFO L462 AbstractCegarLoop]: Abstraction has 421 states and 590 transitions. [2019-10-14 21:51:46,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:51:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 590 transitions. [2019-10-14 21:51:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 21:51:46,984 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:46,985 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:51:46,985 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:46,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:46,986 INFO L82 PathProgramCache]: Analyzing trace with hash 109350879, now seen corresponding path program 1 times [2019-10-14 21:51:46,986 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:46,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914648361] [2019-10-14 21:51:46,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:46,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:46,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:47,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914648361] [2019-10-14 21:51:47,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65780216] [2019-10-14 21:51:47,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:47,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:51:47,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:47,400 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:51:47,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:51:47,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047242490] [2019-10-14 21:51:47,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:51:47,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:47,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:51:47,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:51:47,402 INFO L87 Difference]: Start difference. First operand 421 states and 590 transitions. Second operand 3 states. [2019-10-14 21:51:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:47,986 INFO L93 Difference]: Finished difference Result 1247 states and 1789 transitions. [2019-10-14 21:51:47,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:51:47,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2019-10-14 21:51:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:47,993 INFO L225 Difference]: With dead ends: 1247 [2019-10-14 21:51:47,993 INFO L226 Difference]: Without dead ends: 832 [2019-10-14 21:51:47,995 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 1 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 21:51:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2019-10-14 21:51:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 832. [2019-10-14 21:51:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2019-10-14 21:51:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1102 transitions. [2019-10-14 21:51:48,060 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1102 transitions. Word has length 89 [2019-10-14 21:51:48,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:48,065 INFO L462 AbstractCegarLoop]: Abstraction has 832 states and 1102 transitions. [2019-10-14 21:51:48,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:51:48,065 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1102 transitions. [2019-10-14 21:51:48,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 21:51:48,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:48,078 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:51:48,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:48,284 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:48,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:48,285 INFO L82 PathProgramCache]: Analyzing trace with hash 311463443, now seen corresponding path program 1 times [2019-10-14 21:51:48,285 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:48,286 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707398572] [2019-10-14 21:51:48,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:48,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:48,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:48,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707398572] [2019-10-14 21:51:48,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332510760] [2019-10-14 21:51:48,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:48,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:51:48,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:48,607 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:51:48,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:51:48,607 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975621114] [2019-10-14 21:51:48,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:51:48,608 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:48,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:51:48,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:51:48,609 INFO L87 Difference]: Start difference. First operand 832 states and 1102 transitions. Second operand 3 states. [2019-10-14 21:51:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:49,129 INFO L93 Difference]: Finished difference Result 2345 states and 3186 transitions. [2019-10-14 21:51:49,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:51:49,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-10-14 21:51:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:49,138 INFO L225 Difference]: With dead ends: 2345 [2019-10-14 21:51:49,138 INFO L226 Difference]: Without dead ends: 1519 [2019-10-14 21:51:49,141 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:51:49,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2019-10-14 21:51:49,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1519. [2019-10-14 21:51:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1519 states. [2019-10-14 21:51:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 1968 transitions. [2019-10-14 21:51:49,197 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 1968 transitions. Word has length 95 [2019-10-14 21:51:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:49,197 INFO L462 AbstractCegarLoop]: Abstraction has 1519 states and 1968 transitions. [2019-10-14 21:51:49,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:51:49,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 1968 transitions. [2019-10-14 21:51:49,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-14 21:51:49,207 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:49,207 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:49,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:49,408 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:49,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:49,409 INFO L82 PathProgramCache]: Analyzing trace with hash 538165258, now seen corresponding path program 1 times [2019-10-14 21:51:49,409 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:49,409 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519623149] [2019-10-14 21:51:49,409 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:49,410 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:49,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:51:49,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519623149] [2019-10-14 21:51:49,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615448964] [2019-10-14 21:51:49,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:49,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:51:49,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:51:49,807 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:51:49,807 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:51:49,808 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513456318] [2019-10-14 21:51:49,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:51:49,810 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:49,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:51:49,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:51:49,811 INFO L87 Difference]: Start difference. First operand 1519 states and 1968 transitions. Second operand 3 states. [2019-10-14 21:51:50,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:50,306 INFO L93 Difference]: Finished difference Result 3576 states and 4720 transitions. [2019-10-14 21:51:50,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:51:50,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2019-10-14 21:51:50,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:50,319 INFO L225 Difference]: With dead ends: 3576 [2019-10-14 21:51:50,320 INFO L226 Difference]: Without dead ends: 2063 [2019-10-14 21:51:50,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:51:50,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2019-10-14 21:51:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1928. [2019-10-14 21:51:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2019-10-14 21:51:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2488 transitions. [2019-10-14 21:51:50,389 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2488 transitions. Word has length 114 [2019-10-14 21:51:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:50,390 INFO L462 AbstractCegarLoop]: Abstraction has 1928 states and 2488 transitions. [2019-10-14 21:51:50,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:51:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2488 transitions. [2019-10-14 21:51:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 21:51:50,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:50,396 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:50,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:50,601 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1019583006, now seen corresponding path program 1 times [2019-10-14 21:51:50,602 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:50,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168387262] [2019-10-14 21:51:50,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:50,603 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:50,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:51:50,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168387262] [2019-10-14 21:51:50,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737871393] [2019-10-14 21:51:50,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:50,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:51:50,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:51,013 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:51,014 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-10-14 21:51:51,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080925097] [2019-10-14 21:51:51,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:51:51,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:51,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:51:51,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:51:51,019 INFO L87 Difference]: Start difference. First operand 1928 states and 2488 transitions. Second operand 8 states. [2019-10-14 21:51:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:52,233 INFO L93 Difference]: Finished difference Result 4061 states and 5338 transitions. [2019-10-14 21:51:52,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:51:52,233 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-10-14 21:51:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:52,246 INFO L225 Difference]: With dead ends: 4061 [2019-10-14 21:51:52,247 INFO L226 Difference]: Without dead ends: 2139 [2019-10-14 21:51:52,252 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:51:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2019-10-14 21:51:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1672. [2019-10-14 21:51:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2019-10-14 21:51:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2100 transitions. [2019-10-14 21:51:52,325 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2100 transitions. Word has length 134 [2019-10-14 21:51:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:52,325 INFO L462 AbstractCegarLoop]: Abstraction has 1672 states and 2100 transitions. [2019-10-14 21:51:52,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:51:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2100 transitions. [2019-10-14 21:51:52,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-14 21:51:52,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:52,330 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:52,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:52,534 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:52,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:52,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1811947670, now seen corresponding path program 1 times [2019-10-14 21:51:52,536 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:52,536 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623736900] [2019-10-14 21:51:52,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:52,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:52,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:51:52,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623736900] [2019-10-14 21:51:52,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604012418] [2019-10-14 21:51:52,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:51:52,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-14 21:51:52,954 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:51:52,954 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 21:51:52,954 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778670426] [2019-10-14 21:51:52,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:51:52,955 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:52,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:51:52,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:51:52,956 INFO L87 Difference]: Start difference. First operand 1672 states and 2100 transitions. Second operand 5 states. [2019-10-14 21:51:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:53,775 INFO L93 Difference]: Finished difference Result 4494 states and 5831 transitions. [2019-10-14 21:51:53,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:51:53,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 138 [2019-10-14 21:51:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:53,792 INFO L225 Difference]: With dead ends: 4494 [2019-10-14 21:51:53,793 INFO L226 Difference]: Without dead ends: 2534 [2019-10-14 21:51:53,799 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:51:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2019-10-14 21:51:53,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2103. [2019-10-14 21:51:53,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2103 states. [2019-10-14 21:51:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 2434 transitions. [2019-10-14 21:51:53,880 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 2434 transitions. Word has length 138 [2019-10-14 21:51:53,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:53,881 INFO L462 AbstractCegarLoop]: Abstraction has 2103 states and 2434 transitions. [2019-10-14 21:51:53,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:51:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 2434 transitions. [2019-10-14 21:51:53,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-14 21:51:53,887 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:53,887 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:54,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:54,095 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:54,096 INFO L82 PathProgramCache]: Analyzing trace with hash -331121531, now seen corresponding path program 1 times [2019-10-14 21:51:54,096 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:54,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420609589] [2019-10-14 21:51:54,097 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:54,097 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:54,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 68 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:51:54,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420609589] [2019-10-14 21:51:54,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072959257] [2019-10-14 21:51:54,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:51:54,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-14 21:51:54,613 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:54,613 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:51:54,613 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132123101] [2019-10-14 21:51:54,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:51:54,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:54,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:51:54,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:51:54,624 INFO L87 Difference]: Start difference. First operand 2103 states and 2434 transitions. Second operand 11 states. [2019-10-14 21:51:56,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:56,364 INFO L93 Difference]: Finished difference Result 5328 states and 6312 transitions. [2019-10-14 21:51:56,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:51:56,365 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 146 [2019-10-14 21:51:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:56,379 INFO L225 Difference]: With dead ends: 5328 [2019-10-14 21:51:56,379 INFO L226 Difference]: Without dead ends: 3231 [2019-10-14 21:51:56,385 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:51:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3231 states. [2019-10-14 21:51:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3231 to 2532. [2019-10-14 21:51:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2532 states. [2019-10-14 21:51:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 2944 transitions. [2019-10-14 21:51:56,460 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 2944 transitions. Word has length 146 [2019-10-14 21:51:56,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:56,460 INFO L462 AbstractCegarLoop]: Abstraction has 2532 states and 2944 transitions. [2019-10-14 21:51:56,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:51:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 2944 transitions. [2019-10-14 21:51:56,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 21:51:56,466 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:56,467 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 21:51:56,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:56,671 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:56,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:56,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1840342761, now seen corresponding path program 1 times [2019-10-14 21:51:56,671 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:56,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333114600] [2019-10-14 21:51:56,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:56,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:56,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 100 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 21:51:56,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333114600] [2019-10-14 21:51:56,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398339182] [2019-10-14 21:51:56,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:57,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:51:57,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:51:57,126 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:51:57,127 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 21:51:57,127 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939494858] [2019-10-14 21:51:57,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:51:57,131 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:57,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:51:57,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:51:57,132 INFO L87 Difference]: Start difference. First operand 2532 states and 2944 transitions. Second operand 5 states. [2019-10-14 21:51:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:57,923 INFO L93 Difference]: Finished difference Result 5213 states and 6081 transitions. [2019-10-14 21:51:57,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:51:57,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 171 [2019-10-14 21:51:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:57,939 INFO L225 Difference]: With dead ends: 5213 [2019-10-14 21:51:57,939 INFO L226 Difference]: Without dead ends: 2687 [2019-10-14 21:51:57,945 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:51:57,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2019-10-14 21:51:58,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2675. [2019-10-14 21:51:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2675 states. [2019-10-14 21:51:58,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2675 states to 2675 states and 3104 transitions. [2019-10-14 21:51:58,011 INFO L78 Accepts]: Start accepts. Automaton has 2675 states and 3104 transitions. Word has length 171 [2019-10-14 21:51:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:58,011 INFO L462 AbstractCegarLoop]: Abstraction has 2675 states and 3104 transitions. [2019-10-14 21:51:58,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:51:58,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2675 states and 3104 transitions. [2019-10-14 21:51:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-14 21:51:58,019 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:58,019 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:58,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:58,224 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:58,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:58,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1795430043, now seen corresponding path program 1 times [2019-10-14 21:51:58,225 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:58,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179282227] [2019-10-14 21:51:58,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:58,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:58,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 132 proven. 70 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:51:58,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179282227] [2019-10-14 21:51:58,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574097937] [2019-10-14 21:51:58,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:58,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:51:58,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:58,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:51:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2019-10-14 21:51:58,783 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:58,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:51:58,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398987897] [2019-10-14 21:51:58,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:51:58,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:58,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:51:58,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:51:58,786 INFO L87 Difference]: Start difference. First operand 2675 states and 3104 transitions. Second operand 12 states. [2019-10-14 21:52:00,358 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2019-10-14 21:52:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:52:00,975 INFO L93 Difference]: Finished difference Result 5906 states and 6849 transitions. [2019-10-14 21:52:00,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:52:00,976 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 208 [2019-10-14 21:52:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:52:00,990 INFO L225 Difference]: With dead ends: 5906 [2019-10-14 21:52:00,990 INFO L226 Difference]: Without dead ends: 3237 [2019-10-14 21:52:00,997 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:52:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3237 states. [2019-10-14 21:52:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3237 to 3225. [2019-10-14 21:52:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3225 states. [2019-10-14 21:52:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 3684 transitions. [2019-10-14 21:52:01,121 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 3684 transitions. Word has length 208 [2019-10-14 21:52:01,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:52:01,121 INFO L462 AbstractCegarLoop]: Abstraction has 3225 states and 3684 transitions. [2019-10-14 21:52:01,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:52:01,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 3684 transitions. [2019-10-14 21:52:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-10-14 21:52:01,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:52:01,134 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:52:01,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:01,339 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:52:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:52:01,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1595926389, now seen corresponding path program 1 times [2019-10-14 21:52:01,339 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:52:01,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125660653] [2019-10-14 21:52:01,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:01,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:01,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:52:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 165 proven. 32 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-10-14 21:52:01,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125660653] [2019-10-14 21:52:01,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166820145] [2019-10-14 21:52:01,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:01,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:52:01,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:52:01,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:52:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-10-14 21:52:01,897 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:52:01,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:52:01,898 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349398546] [2019-10-14 21:52:01,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:52:01,900 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:52:01,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:52:01,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:52:01,901 INFO L87 Difference]: Start difference. First operand 3225 states and 3684 transitions. Second operand 11 states. [2019-10-14 21:52:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:52:04,342 INFO L93 Difference]: Finished difference Result 6945 states and 8134 transitions. [2019-10-14 21:52:04,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:52:04,342 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 225 [2019-10-14 21:52:04,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:52:04,359 INFO L225 Difference]: With dead ends: 6945 [2019-10-14 21:52:04,360 INFO L226 Difference]: Without dead ends: 3714 [2019-10-14 21:52:04,368 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:52:04,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2019-10-14 21:52:04,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 3640. [2019-10-14 21:52:04,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3640 states. [2019-10-14 21:52:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 4112 transitions. [2019-10-14 21:52:04,470 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 4112 transitions. Word has length 225 [2019-10-14 21:52:04,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:52:04,471 INFO L462 AbstractCegarLoop]: Abstraction has 3640 states and 4112 transitions. [2019-10-14 21:52:04,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:52:04,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 4112 transitions. [2019-10-14 21:52:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-10-14 21:52:04,481 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:52:04,481 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:52:04,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:04,687 INFO L410 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:52:04,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:52:04,687 INFO L82 PathProgramCache]: Analyzing trace with hash -804877350, now seen corresponding path program 1 times [2019-10-14 21:52:04,688 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:52:04,688 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574398085] [2019-10-14 21:52:04,688 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:04,688 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:04,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:52:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 363 proven. 19 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-14 21:52:05,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574398085] [2019-10-14 21:52:05,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783124703] [2019-10-14 21:52:05,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:05,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:52:05,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:52:05,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:52:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 355 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2019-10-14 21:52:06,085 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:52:06,085 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 18 [2019-10-14 21:52:06,090 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509615334] [2019-10-14 21:52:06,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:52:06,091 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:52:06,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:52:06,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:52:06,092 INFO L87 Difference]: Start difference. First operand 3640 states and 4112 transitions. Second operand 18 states. [2019-10-14 21:52:06,227 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2019-10-14 21:52:06,504 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2019-10-14 21:52:06,915 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2019-10-14 21:52:07,124 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2019-10-14 21:52:07,740 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-10-14 21:52:08,042 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2019-10-14 21:52:08,205 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2019-10-14 21:52:08,978 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2019-10-14 21:52:09,159 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2019-10-14 21:52:09,499 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2019-10-14 21:52:10,045 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2019-10-14 21:52:10,637 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-10-14 21:52:11,268 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2019-10-14 21:52:11,790 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2019-10-14 21:52:12,396 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2019-10-14 21:52:13,128 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2019-10-14 21:52:13,301 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2019-10-14 21:52:14,161 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2019-10-14 21:52:14,483 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2019-10-14 21:52:14,717 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2019-10-14 21:52:15,185 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2019-10-14 21:52:15,356 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81