/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:45:03,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:45:03,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:45:03,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:45:03,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:45:03,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:45:03,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:45:03,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:45:03,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:45:03,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:45:03,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:45:03,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:45:03,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:45:03,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:45:03,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:45:03,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:45:03,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:45:03,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:45:03,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:45:03,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:45:03,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:45:03,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:45:03,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:45:03,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:45:03,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:45:03,903 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 [2020-07-21 15:45:03,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:45:03,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:45:03,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:45:03,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:45:03,919 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:45:03,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:45:03,919 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:45:03,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:45:03,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:45:03,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:45:03,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:45:03,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:45:03,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:45:03,920 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:45:03,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:45:03,921 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:45:03,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:45:03,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:45:03,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:45:03,921 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:45:03,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:45:03,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:03,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:45:03,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:45:03,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:45:03,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:45:03,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:03,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:45:03,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:45:03,923 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 15:45:04,232 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:45:04,254 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:45:04,258 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:45:04,262 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:45:04,262 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:45:04,264 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-21 15:45:04,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f96cbd3b/7de7f99197574c73afe8f14c1e1aaa73/FLAGe6b0edb95 [2020-07-21 15:45:04,817 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:45:04,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-21 15:45:04,824 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f96cbd3b/7de7f99197574c73afe8f14c1e1aaa73/FLAGe6b0edb95 [2020-07-21 15:45:05,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f96cbd3b/7de7f99197574c73afe8f14c1e1aaa73 [2020-07-21 15:45:05,263 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:45:05,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:45:05,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:05,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:45:05,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:45:05,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:05" (1/1) ... [2020-07-21 15:45:05,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d385da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:05, skipping insertion in model container [2020-07-21 15:45:05,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:05" (1/1) ... [2020-07-21 15:45:05,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:45:05,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:45:05,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:05,521 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:45:05,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:05,551 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:45:05,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:05 WrapperNode [2020-07-21 15:45:05,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:05,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:45:05,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:45:05,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:45:05,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:05" (1/1) ... [2020-07-21 15:45:05,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:05" (1/1) ... [2020-07-21 15:45:05,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:05" (1/1) ... [2020-07-21 15:45:05,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:05" (1/1) ... [2020-07-21 15:45:05,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:05" (1/1) ... [2020-07-21 15:45:05,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:05" (1/1) ... [2020-07-21 15:45:05,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:05" (1/1) ... [2020-07-21 15:45:05,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:45:05,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:45:05,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:45:05,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:45:05,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:05" (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 [2020-07-21 15:45:05,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:45:05,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:45:05,720 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-07-21 15:45:05,721 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-07-21 15:45:05,721 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:45:05,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:45:05,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:45:05,722 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-07-21 15:45:05,722 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-07-21 15:45:05,722 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:45:05,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:45:05,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:45:05,929 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:45:05,929 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:45:05,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:05 BoogieIcfgContainer [2020-07-21 15:45:05,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:45:05,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:45:05,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:45:05,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:45:05,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:45:05" (1/3) ... [2020-07-21 15:45:05,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b00bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:05, skipping insertion in model container [2020-07-21 15:45:05,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:05" (2/3) ... [2020-07-21 15:45:05,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b00bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:05, skipping insertion in model container [2020-07-21 15:45:05,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:05" (3/3) ... [2020-07-21 15:45:05,945 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-07-21 15:45:05,957 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:45:05,968 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:45:05,987 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:45:06,029 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:45:06,030 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:45:06,030 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:45:06,030 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:45:06,030 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:45:06,031 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:45:06,031 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:45:06,031 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:45:06,055 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 15:45:06,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 15:45:06,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:06,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:06,067 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:06,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:06,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2122072279, now seen corresponding path program 1 times [2020-07-21 15:45:06,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:06,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006635595] [2020-07-21 15:45:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 15:45:06,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:06,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:06,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 15:45:06,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:45:06,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:06,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006635595] [2020-07-21 15:45:06,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:06,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:45:06,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685175705] [2020-07-21 15:45:06,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:45:06,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:06,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:45:06,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:06,323 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-07-21 15:45:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:06,454 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-07-21 15:45:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:06,456 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-21 15:45:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:06,467 INFO L225 Difference]: With dead ends: 41 [2020-07-21 15:45:06,467 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 15:45:06,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 15:45:06,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 15:45:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 15:45:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 15:45:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-21 15:45:06,517 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-07-21 15:45:06,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:06,517 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-21 15:45:06,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:45:06,518 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-21 15:45:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 15:45:06,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:06,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:06,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:06,734 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:06,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:06,735 INFO L82 PathProgramCache]: Analyzing trace with hash -612070348, now seen corresponding path program 1 times [2020-07-21 15:45:06,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:06,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465265340] [2020-07-21 15:45:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 15:45:06,777 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:06,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:06,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 15:45:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:45:06,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:06,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465265340] [2020-07-21 15:45:06,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:06,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:45:06,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960516045] [2020-07-21 15:45:06,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:45:06,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:06,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:45:06,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:06,850 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-07-21 15:45:06,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:06,954 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-21 15:45:06,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:06,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 15:45:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:06,957 INFO L225 Difference]: With dead ends: 33 [2020-07-21 15:45:06,957 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 15:45:06,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 15:45:06,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 15:45:06,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-07-21 15:45:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 15:45:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-21 15:45:06,973 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2020-07-21 15:45:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:06,974 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-21 15:45:06,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:45:06,976 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-21 15:45:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 15:45:06,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:06,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:07,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:07,193 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:07,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:07,193 INFO L82 PathProgramCache]: Analyzing trace with hash -592576498, now seen corresponding path program 1 times [2020-07-21 15:45:07,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:07,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078142415] [2020-07-21 15:45:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 15:45:07,228 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:07,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:07,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 15:45:07,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:45:07,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:07,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078142415] [2020-07-21 15:45:07,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:07,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 15:45:07,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646675620] [2020-07-21 15:45:07,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:45:07,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:07,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:45:07,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:45:07,342 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 9 states. [2020-07-21 15:45:07,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:07,521 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-07-21 15:45:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:45:07,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-07-21 15:45:07,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:07,523 INFO L225 Difference]: With dead ends: 38 [2020-07-21 15:45:07,523 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 15:45:07,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:45:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 15:45:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-07-21 15:45:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 15:45:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-21 15:45:07,531 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2020-07-21 15:45:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:07,531 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-21 15:45:07,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:45:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-21 15:45:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 15:45:07,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:07,533 INFO L422 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] [2020-07-21 15:45:07,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:07,746 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:07,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:07,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1306118367, now seen corresponding path program 1 times [2020-07-21 15:45:07,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:07,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512740982] [2020-07-21 15:45:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 15:45:07,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:07,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:07,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 15:45:07,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:45:07,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:07,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512740982] [2020-07-21 15:45:07,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:07,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 15:45:07,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536383063] [2020-07-21 15:45:07,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:45:07,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:07,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:45:07,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:45:07,892 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 9 states. [2020-07-21 15:45:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:08,069 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-07-21 15:45:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:45:08,070 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-07-21 15:45:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:08,071 INFO L225 Difference]: With dead ends: 39 [2020-07-21 15:45:08,072 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 15:45:08,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:45:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 15:45:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-07-21 15:45:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 15:45:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-21 15:45:08,086 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-07-21 15:45:08,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:08,087 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-21 15:45:08,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:45:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-21 15:45:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 15:45:08,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:08,091 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 15:45:08,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:08,293 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:08,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:08,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1571291849, now seen corresponding path program 1 times [2020-07-21 15:45:08,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:08,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875106668] [2020-07-21 15:45:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 15:45:08,323 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:08,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:08,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:45:08,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 15:45:08,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:08,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875106668] [2020-07-21 15:45:08,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:08,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:45:08,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129659432] [2020-07-21 15:45:08,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:45:08,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:08,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:45:08,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:08,355 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-07-21 15:45:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:08,399 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-07-21 15:45:08,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:45:08,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-21 15:45:08,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:08,401 INFO L225 Difference]: With dead ends: 44 [2020-07-21 15:45:08,401 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 15:45:08,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 15:45:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 15:45:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 15:45:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-21 15:45:08,408 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 28 [2020-07-21 15:45:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:08,408 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-21 15:45:08,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:45:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-21 15:45:08,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 15:45:08,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:08,410 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 15:45:08,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:08,623 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:08,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1610221656, now seen corresponding path program 1 times [2020-07-21 15:45:08,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:08,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772791452] [2020-07-21 15:45:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 15:45:08,651 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:08,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:08,652 WARN L261 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-21 15:45:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 15:45:08,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:08,823 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 1] term [2020-07-21 15:45:08,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:09,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:09,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 15:45:09,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 15:45:09,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 15:45:09,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 15:45:09,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:09,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 15:45:09,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772791452] [2020-07-21 15:45:09,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:09,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2020-07-21 15:45:09,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607783049] [2020-07-21 15:45:09,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 15:45:09,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:09,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 15:45:09,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:45:09,432 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 18 states. [2020-07-21 15:45:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:09,814 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-07-21 15:45:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:45:09,814 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-07-21 15:45:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:09,816 INFO L225 Difference]: With dead ends: 42 [2020-07-21 15:45:09,816 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 15:45:09,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:45:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 15:45:09,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-07-21 15:45:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 15:45:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-21 15:45:09,824 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2020-07-21 15:45:09,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:09,824 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-21 15:45:09,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 15:45:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-21 15:45:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-21 15:45:09,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:09,826 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 15:45:10,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:10,030 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:10,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:10,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1278768946, now seen corresponding path program 1 times [2020-07-21 15:45:10,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:10,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362993411] [2020-07-21 15:45:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:10,061 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:10,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:10,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:45:10,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 15:45:10,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:10,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362993411] [2020-07-21 15:45:10,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:10,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:45:10,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788346356] [2020-07-21 15:45:10,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:45:10,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:10,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:45:10,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:10,088 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 5 states. [2020-07-21 15:45:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:10,125 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-07-21 15:45:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:45:10,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-07-21 15:45:10,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:10,127 INFO L225 Difference]: With dead ends: 48 [2020-07-21 15:45:10,127 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 15:45:10,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:10,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 15:45:10,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 15:45:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 15:45:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-07-21 15:45:10,134 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 35 [2020-07-21 15:45:10,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:10,135 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-07-21 15:45:10,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:45:10,135 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-07-21 15:45:10,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 15:45:10,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:10,136 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 15:45:10,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:10,343 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:10,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1417612799, now seen corresponding path program 1 times [2020-07-21 15:45:10,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:10,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317984942] [2020-07-21 15:45:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:10,371 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:10,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:10,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 15:45:10,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 15:45:10,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:11,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:11,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:11,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 15:45:11,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317984942] [2020-07-21 15:45:11,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:11,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2020-07-21 15:45:11,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38712052] [2020-07-21 15:45:11,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 15:45:11,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:11,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 15:45:11,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-07-21 15:45:11,445 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 28 states. [2020-07-21 15:45:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:11,447 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-07-21 15:45:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 15:45:11,448 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-07-21 15:45:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:11,448 INFO L225 Difference]: With dead ends: 33 [2020-07-21 15:45:11,448 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 15:45:11,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-07-21 15:45:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 15:45:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 15:45:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 15:45:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 15:45:11,450 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-07-21 15:45:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:11,450 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 15:45:11,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 15:45:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 15:45:11,451 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 15:45:11,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:11,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 15:45:11,706 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 15:45:11,706 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:45:11,707 INFO L271 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: true [2020-07-21 15:45:11,707 INFO L268 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-07-21 15:45:11,707 INFO L268 CegarLoopResult]: For program point L29(lines 29 33) no Hoare annotation was computed. [2020-07-21 15:45:11,707 INFO L268 CegarLoopResult]: For program point isEvenEXIT(lines 26 34) no Hoare annotation was computed. [2020-07-21 15:45:11,707 INFO L268 CegarLoopResult]: For program point L27(lines 27 33) no Hoare annotation was computed. [2020-07-21 15:45:11,707 INFO L268 CegarLoopResult]: For program point isEvenFINAL(lines 26 34) no Hoare annotation was computed. [2020-07-21 15:45:11,707 INFO L271 CegarLoopResult]: At program point isEvenENTRY(lines 26 34) the Hoare annotation is: true [2020-07-21 15:45:11,707 INFO L268 CegarLoopResult]: For program point L17(lines 17 23) no Hoare annotation was computed. [2020-07-21 15:45:11,708 INFO L268 CegarLoopResult]: For program point isOddFINAL(lines 16 24) no Hoare annotation was computed. [2020-07-21 15:45:11,708 INFO L271 CegarLoopResult]: At program point isOddENTRY(lines 16 24) the Hoare annotation is: true [2020-07-21 15:45:11,708 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-07-21 15:45:11,708 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-21 15:45:11,708 INFO L268 CegarLoopResult]: For program point isOddEXIT(lines 16 24) no Hoare annotation was computed. [2020-07-21 15:45:11,708 INFO L268 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-07-21 15:45:11,709 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:45:11,709 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: false [2020-07-21 15:45:11,709 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 15:45:11,709 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 15:45:11,709 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 47) no Hoare annotation was computed. [2020-07-21 15:45:11,717 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 37 49) the Hoare annotation is: true [2020-07-21 15:45:11,718 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 37 49) no Hoare annotation was computed. [2020-07-21 15:45:11,718 INFO L268 CegarLoopResult]: For program point L47(line 47) no Hoare annotation was computed. [2020-07-21 15:45:11,718 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 37 49) no Hoare annotation was computed. [2020-07-21 15:45:11,718 INFO L268 CegarLoopResult]: For program point L44(lines 44 48) no Hoare annotation was computed. [2020-07-21 15:45:11,718 INFO L271 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: true [2020-07-21 15:45:11,718 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-07-21 15:45:11,718 INFO L268 CegarLoopResult]: For program point L39(lines 39 41) no Hoare annotation was computed. [2020-07-21 15:45:11,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:45:11 BoogieIcfgContainer [2020-07-21 15:45:11,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:45:11,730 INFO L168 Benchmark]: Toolchain (without parser) took 6464.04 ms. Allocated memory was 136.8 MB in the beginning and 252.2 MB in the end (delta: 115.3 MB). Free memory was 101.9 MB in the beginning and 93.0 MB in the end (delta: 8.9 MB). Peak memory consumption was 124.2 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:11,732 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 15:45:11,732 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.54 ms. Allocated memory is still 136.8 MB. Free memory was 101.4 MB in the beginning and 91.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:11,735 INFO L168 Benchmark]: Boogie Preprocessor took 103.28 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 179.4 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:11,736 INFO L168 Benchmark]: RCFGBuilder took 278.02 ms. Allocated memory is still 200.3 MB. Free memory was 179.4 MB in the beginning and 165.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:11,738 INFO L168 Benchmark]: TraceAbstraction took 5791.21 ms. Allocated memory was 200.3 MB in the beginning and 252.2 MB in the end (delta: 51.9 MB). Free memory was 165.6 MB in the beginning and 93.0 MB in the end (delta: 72.7 MB). Peak memory consumption was 124.6 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:11,745 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.54 ms. Allocated memory is still 136.8 MB. Free memory was 101.4 MB in the beginning and 91.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.28 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 179.4 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 278.02 ms. Allocated memory is still 200.3 MB. Free memory was 179.4 MB in the beginning and 165.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5791.21 ms. Allocated memory was 200.3 MB in the beginning and 252.2 MB in the end (delta: 51.9 MB). Free memory was 165.6 MB in the beginning and 93.0 MB in the end (delta: 72.7 MB). Peak memory consumption was 124.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 47]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.6s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 155 SDtfs, 65 SDslu, 692 SDs, 0 SdLazy, 567 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 272 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 18 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 200 NumberOfCodeBlocks, 151 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 255 ConstructedInterpolants, 0 QuantifiedInterpolants, 28120 SizeOfPredicates, 36 NumberOfNonLiveVariables, 413 ConjunctsInSsa, 147 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 28/49 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...