/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o200.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:16:06,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:16:06,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:16:06,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:16:06,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:16:06,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:16:06,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:16:06,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:16:06,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:16:06,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:16:06,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:16:06,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:16:06,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:16:06,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:16:06,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:16:06,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:16:06,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:16:06,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:16:06,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:16:06,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:16:06,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:16:06,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:16:06,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:16:06,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:16:06,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:16:06,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:16:06,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:16:06,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:16:06,309 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 [2020-07-20 11:16:06,330 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:16:06,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:16:06,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:16:06,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:16:06,334 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:16:06,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:16:06,335 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:16:06,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:16:06,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:16:06,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:16:06,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:16:06,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:16:06,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:16:06,336 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:16:06,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:16:06,337 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:16:06,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:16:06,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:16:06,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:16:06,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:16:06,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:16:06,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:16:06,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:16:06,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:16:06,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:16:06,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:16:06,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:06,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:16:06,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:16:06,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:16:06,762 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:16:06,792 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:16:06,799 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:16:06,802 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:16:06,803 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:16:06,807 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o200.c [2020-07-20 11:16:06,948 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d69be4d6/d9c6dacc4a00431d99471b56dec69946/FLAG89bc41f53 [2020-07-20 11:16:07,808 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:16:07,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o200.c [2020-07-20 11:16:07,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d69be4d6/d9c6dacc4a00431d99471b56dec69946/FLAG89bc41f53 [2020-07-20 11:16:07,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d69be4d6/d9c6dacc4a00431d99471b56dec69946 [2020-07-20 11:16:07,893 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:16:07,899 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:16:07,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:16:07,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:16:07,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:16:07,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:16:07" (1/1) ... [2020-07-20 11:16:07,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fdad7d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:16:07, skipping insertion in model container [2020-07-20 11:16:07,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:16:07" (1/1) ... [2020-07-20 11:16:07,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:16:07,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:16:08,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:16:08,228 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:16:08,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:16:08,271 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:16:08,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:16:08 WrapperNode [2020-07-20 11:16:08,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:16:08,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:16:08,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:16:08,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:16:08,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:16:08" (1/1) ... [2020-07-20 11:16:08,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:16:08" (1/1) ... [2020-07-20 11:16:08,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:16:08" (1/1) ... [2020-07-20 11:16:08,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:16:08" (1/1) ... [2020-07-20 11:16:08,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:16:08" (1/1) ... [2020-07-20 11:16:08,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:16:08" (1/1) ... [2020-07-20 11:16:08,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:16:08" (1/1) ... [2020-07-20 11:16:08,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:16:08,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:16:08,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:16:08,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:16:08,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:16:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:16:08,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:16:08,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:16:08,560 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 11:16:08,560 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:16:08,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 11:16:08,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:16:08,561 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 11:16:08,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:16:08,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:16:08,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:16:08,774 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:16:08,775 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:16:08,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:16:08 BoogieIcfgContainer [2020-07-20 11:16:08,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:16:08,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:16:08,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:16:08,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:16:08,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:16:07" (1/3) ... [2020-07-20 11:16:08,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d05b9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:16:08, skipping insertion in model container [2020-07-20 11:16:08,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:16:08" (2/3) ... [2020-07-20 11:16:08,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d05b9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:16:08, skipping insertion in model container [2020-07-20 11:16:08,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:16:08" (3/3) ... [2020-07-20 11:16:08,794 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o200.c [2020-07-20 11:16:08,809 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:16:08,820 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:16:08,842 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:16:08,879 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:16:08,879 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:16:08,880 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:16:08,880 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:16:08,880 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:16:08,880 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:16:08,881 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:16:08,881 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:16:08,910 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 11:16:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:16:08,921 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:08,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:08,924 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:08,935 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-20 11:16:08,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:08,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488922728] [2020-07-20 11:16:08,948 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:09,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:16:09,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:16:09,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:16:09,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488922728] [2020-07-20 11:16:09,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:16:09,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:16:09,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20281190] [2020-07-20 11:16:09,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:16:09,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:09,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:16:09,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:16:09,206 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 11:16:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:09,302 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-20 11:16:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:16:09,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:16:09,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:09,319 INFO L225 Difference]: With dead ends: 32 [2020-07-20 11:16:09,320 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 11:16:09,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:16:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 11:16:09,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 11:16:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 11:16:09,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 11:16:09,401 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 11:16:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:09,402 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 11:16:09,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:16:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 11:16:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:16:09,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:09,406 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:09,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:09,615 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:09,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:09,617 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-20 11:16:09,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:09,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366477094] [2020-07-20 11:16:09,619 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:16:09,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:16:09,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:16:10,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366477094] [2020-07-20 11:16:10,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:10,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-20 11:16:10,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955899765] [2020-07-20 11:16:10,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:16:10,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:10,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:16:10,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:16:10,121 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-07-20 11:16:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:10,274 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-07-20 11:16:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:16:10,276 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-07-20 11:16:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:10,278 INFO L225 Difference]: With dead ends: 30 [2020-07-20 11:16:10,279 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 11:16:10,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:16:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 11:16:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 11:16:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 11:16:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 11:16:10,294 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-07-20 11:16:10,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:10,295 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 11:16:10,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:16:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 11:16:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 11:16:10,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:10,298 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:10,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:10,513 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 2 times [2020-07-20 11:16:10,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:10,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360623401] [2020-07-20 11:16:10,515 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:10,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 11:16:10,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 11:16:10,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 11:16:11,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360623401] [2020-07-20 11:16:11,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:11,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-20 11:16:11,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321997995] [2020-07-20 11:16:11,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 11:16:11,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:11,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 11:16:11,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:16:11,555 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 20 states. [2020-07-20 11:16:14,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:14,195 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-20 11:16:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 11:16:14,196 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-07-20 11:16:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:14,198 INFO L225 Difference]: With dead ends: 42 [2020-07-20 11:16:14,198 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 11:16:14,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:16:14,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 11:16:14,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 11:16:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 11:16:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 11:16:14,213 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-07-20 11:16:14,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:14,214 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 11:16:14,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 11:16:14,214 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 11:16:14,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 11:16:14,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:14,218 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:14,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:14,420 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 3 times [2020-07-20 11:16:14,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:14,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289440398] [2020-07-20 11:16:14,422 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:14,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 11:16:14,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 11:16:14,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 11:16:16,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289440398] [2020-07-20 11:16:16,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:16,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-20 11:16:16,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154754155] [2020-07-20 11:16:16,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 11:16:16,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:16,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 11:16:16,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 11:16:16,983 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 36 states. [2020-07-20 11:16:17,846 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-20 11:16:20,600 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-20 11:16:23,076 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2020-07-20 11:16:25,604 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-20 11:16:40,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:40,534 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-07-20 11:16:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 11:16:40,538 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 55 [2020-07-20 11:16:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:40,541 INFO L225 Difference]: With dead ends: 66 [2020-07-20 11:16:40,541 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 11:16:40,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=380, Invalid=1871, Unknown=5, NotChecked=0, Total=2256 [2020-07-20 11:16:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 11:16:40,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 11:16:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 11:16:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 11:16:40,560 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2020-07-20 11:16:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:40,561 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 11:16:40,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 11:16:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 11:16:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 11:16:40,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:40,566 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:40,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:40,782 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:40,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:40,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 4 times [2020-07-20 11:16:40,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:40,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204472488] [2020-07-20 11:16:40,785 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:40,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-20 11:16:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 11:16:41,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 334 refuted. 11 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 11:17:11,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204472488] [2020-07-20 11:17:11,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:11,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-20 11:17:11,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47093375] [2020-07-20 11:17:11,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-20 11:17:11,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:11,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-20 11:17:11,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3929, Unknown=11, NotChecked=0, Total=4556 [2020-07-20 11:17:11,698 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 68 states. [2020-07-20 11:17:17,918 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 13 [2020-07-20 11:17:25,298 WARN L193 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2020-07-20 11:17:32,362 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 73 DAG size of output: 13 [2020-07-20 11:17:38,869 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2020-07-20 11:17:42,787 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 13 [2020-07-20 11:17:46,817 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 11 [2020-07-20 11:17:52,901 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 13 [2020-07-20 11:17:59,939 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 11 [2020-07-20 11:18:04,535 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-20 11:18:10,530 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-20 11:18:17,564 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 53 DAG size of output: 13 [2020-07-20 11:18:20,288 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-20 11:18:27,071 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 13 [2020-07-20 11:18:31,618 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-20 11:18:36,563 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 13 [2020-07-20 11:18:43,352 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-20 11:18:49,525 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-20 11:19:02,253 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2020-07-20 11:19:07,622 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-20 11:19:39,671 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 11:19:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:19:48,718 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2020-07-20 11:19:48,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-20 11:19:48,721 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 103 [2020-07-20 11:19:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:19:48,725 INFO L225 Difference]: With dead ends: 114 [2020-07-20 11:19:48,725 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 11:19:48,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 181.3s TimeCoverageRelationStatistics Valid=1516, Invalid=7575, Unknown=29, NotChecked=0, Total=9120 [2020-07-20 11:19:48,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 11:19:48,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-20 11:19:48,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 11:19:48,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-07-20 11:19:48,746 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2020-07-20 11:19:48,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:19:48,747 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-07-20 11:19:48,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-20 11:19:48,747 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-07-20 11:19:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-20 11:19:48,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:19:48,755 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:19:48,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:19:48,963 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:19:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:19:48,963 INFO L82 PathProgramCache]: Analyzing trace with hash -935230737, now seen corresponding path program 5 times [2020-07-20 11:19:48,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:19:48,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540373620] [2020-07-20 11:19:48,965 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:19:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:19:49,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 131 conjunts are in the unsatisfiable core [2020-07-20 11:19:49,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:19:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-20 11:19:52,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:22:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1409 refuted. 48 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-20 11:22:01,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540373620] [2020-07-20 11:22:01,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:22:01,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-20 11:22:01,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908433369] [2020-07-20 11:22:01,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-20 11:22:01,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:01,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-20 11:22:01,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2248, Invalid=14997, Unknown=47, NotChecked=0, Total=17292 [2020-07-20 11:22:01,126 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 132 states. [2020-07-20 11:23:05,913 WARN L193 SmtUtils]: Spent 7.35 s on a formula simplification. DAG size of input: 158 DAG size of output: 13 [2020-07-20 11:24:12,166 WARN L193 SmtUtils]: Spent 7.37 s on a formula simplification. DAG size of input: 156 DAG size of output: 11 [2020-07-20 11:25:12,256 WARN L193 SmtUtils]: Spent 8.25 s on a formula simplification. DAG size of input: 153 DAG size of output: 13 [2020-07-20 11:26:08,437 WARN L193 SmtUtils]: Spent 6.95 s on a formula simplification. DAG size of input: 151 DAG size of output: 11 [2020-07-20 11:27:07,398 WARN L193 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 148 DAG size of output: 13 [2020-07-20 11:28:12,929 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2020-07-20 11:29:12,090 WARN L193 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 143 DAG size of output: 13 [2020-07-20 11:30:13,400 WARN L193 SmtUtils]: Spent 7.08 s on a formula simplification. DAG size of input: 141 DAG size of output: 11