/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_FUNCTIONS --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 12:56:17,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:56:17,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:56:17,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:56:17,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:56:17,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:56:17,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:56:17,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:56:17,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:56:17,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:56:17,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:56:17,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:56:17,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:56:17,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:56:17,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:56:17,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:56:17,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:56:17,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:56:17,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:56:17,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:56:17,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:56:17,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:56:17,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:56:17,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:56:17,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:56:17,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:56:17,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:56:17,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:56:17,209 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 12:56:17,225 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:56:17,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:56:17,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:56:17,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:56:17,227 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:56:17,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:56:17,228 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:56:17,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:56:17,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:56:17,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:56:17,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:56:17,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:56:17,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:56:17,229 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:56:17,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:56:17,229 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:56:17,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:56:17,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:56:17,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:56:17,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:56:17,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:56:17,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:56:17,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:56:17,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:56:17,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:56:17,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:56:17,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:17,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:56:17,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:56:17,232 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_FUNCTIONS 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 12:56:17,522 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:56:17,537 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:56:17,540 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:56:17,542 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:56:17,543 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:56:17,543 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-21 12:56:17,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3cbc5c76/52c6bab964a24abd9d8652ee513340e7/FLAGd8f17b699 [2020-07-21 12:56:18,123 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:56:18,124 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-21 12:56:18,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3cbc5c76/52c6bab964a24abd9d8652ee513340e7/FLAGd8f17b699 [2020-07-21 12:56:18,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3cbc5c76/52c6bab964a24abd9d8652ee513340e7 [2020-07-21 12:56:18,514 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:56:18,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:56:18,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:18,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:56:18,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:56:18,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:18" (1/1) ... [2020-07-21 12:56:18,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3080620c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:18, skipping insertion in model container [2020-07-21 12:56:18,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:18" (1/1) ... [2020-07-21 12:56:18,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:56:18,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:56:18,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:18,743 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:56:18,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:18,771 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:56:18,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:18 WrapperNode [2020-07-21 12:56:18,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:18,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:56:18,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:56:18,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:56:18,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:18" (1/1) ... [2020-07-21 12:56:18,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:18" (1/1) ... [2020-07-21 12:56:18,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:18" (1/1) ... [2020-07-21 12:56:18,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:18" (1/1) ... [2020-07-21 12:56:18,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:18" (1/1) ... [2020-07-21 12:56:18,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:18" (1/1) ... [2020-07-21 12:56:18,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:18" (1/1) ... [2020-07-21 12:56:18,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:56:18,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:56:18,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:56:18,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:56:18,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:18" (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 12:56:18,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:56:18,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:56:18,965 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-07-21 12:56:18,965 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-07-21 12:56:18,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:56:18,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:56:18,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:56:18,966 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-07-21 12:56:18,966 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-07-21 12:56:18,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:56:18,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:56:18,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:56:19,189 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:56:19,189 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:56:19,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:19 BoogieIcfgContainer [2020-07-21 12:56:19,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:56:19,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:56:19,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:56:19,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:56:19,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:56:18" (1/3) ... [2020-07-21 12:56:19,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cba3de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:56:19, skipping insertion in model container [2020-07-21 12:56:19,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:18" (2/3) ... [2020-07-21 12:56:19,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cba3de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:56:19, skipping insertion in model container [2020-07-21 12:56:19,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:19" (3/3) ... [2020-07-21 12:56:19,204 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-07-21 12:56:19,216 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:56:19,225 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:56:19,242 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:56:19,282 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:56:19,283 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:56:19,283 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:56:19,283 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:56:19,283 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:56:19,284 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:56:19,284 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:56:19,284 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:56:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 12:56:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 12:56:19,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:19,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:19,322 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:19,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:19,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2122072279, now seen corresponding path program 1 times [2020-07-21 12:56:19,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:19,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197616218] [2020-07-21 12:56:19,345 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 12:56:19,419 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:19,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:19,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 12:56:19,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:19,558 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 12:56:19,562 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 12:56:19,680 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 12:56:19,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:19,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197616218] [2020-07-21 12:56:19,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:19,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:56:19,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699594923] [2020-07-21 12:56:19,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:56:19,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:19,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:56:19,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:56:19,710 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2020-07-21 12:56:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:19,882 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-07-21 12:56:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:56:19,885 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-21 12:56:19,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:19,897 INFO L225 Difference]: With dead ends: 43 [2020-07-21 12:56:19,898 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 12:56:19,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:56:19,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 12:56:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 12:56:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 12:56:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-21 12:56:19,957 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-07-21 12:56:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:19,958 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-21 12:56:19,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:56:19,959 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-21 12:56:19,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 12:56:19,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:19,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:20,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:20,176 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:20,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:20,177 INFO L82 PathProgramCache]: Analyzing trace with hash -612070348, now seen corresponding path program 1 times [2020-07-21 12:56:20,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:20,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834462245] [2020-07-21 12:56:20,178 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 12:56:20,215 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:20,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:20,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 12:56:20,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:20,317 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 12:56:20,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:20,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834462245] [2020-07-21 12:56:20,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:20,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:56:20,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639538415] [2020-07-21 12:56:20,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:56:20,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:56:20,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:56:20,325 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-07-21 12:56:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:20,468 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-21 12:56:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:56:20,469 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-21 12:56:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:20,471 INFO L225 Difference]: With dead ends: 33 [2020-07-21 12:56:20,471 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 12:56:20,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:56:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 12:56:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-07-21 12:56:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 12:56:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-21 12:56:20,481 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2020-07-21 12:56:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:20,482 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-21 12:56:20,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:56:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-21 12:56:20,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 12:56:20,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:20,484 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 12:56:20,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:20,698 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:20,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:20,700 INFO L82 PathProgramCache]: Analyzing trace with hash -592576498, now seen corresponding path program 1 times [2020-07-21 12:56:20,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:20,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996574632] [2020-07-21 12:56:20,701 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 12:56:20,733 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:20,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:20,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:56:20,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:20,780 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 12:56:20,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:20,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996574632] [2020-07-21 12:56:20,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:20,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:56:20,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258065537] [2020-07-21 12:56:20,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:56:20,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:56:20,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:56:20,785 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-07-21 12:56:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:20,847 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-07-21 12:56:20,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:56:20,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-21 12:56:20,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:20,851 INFO L225 Difference]: With dead ends: 41 [2020-07-21 12:56:20,851 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 12:56:20,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 12:56:20,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 12:56:20,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-07-21 12:56:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 12:56:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-21 12:56:20,858 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-07-21 12:56:20,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:20,859 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-21 12:56:20,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:56:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-21 12:56:20,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 12:56:20,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:20,860 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 12:56:21,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:21,061 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:21,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1306118367, now seen corresponding path program 1 times [2020-07-21 12:56:21,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:21,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760890274] [2020-07-21 12:56:21,063 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 12:56:21,109 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:21,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:21,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 12:56:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:21,216 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 12:56:21,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:21,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760890274] [2020-07-21 12:56:21,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:21,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-21 12:56:21,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895370769] [2020-07-21 12:56:21,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 12:56:21,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:21,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 12:56:21,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-21 12:56:21,219 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 10 states. [2020-07-21 12:56:21,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:21,398 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-07-21 12:56:21,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 12:56:21,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-07-21 12:56:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:21,401 INFO L225 Difference]: With dead ends: 36 [2020-07-21 12:56:21,402 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 12:56:21,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-21 12:56:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 12:56:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 12:56:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 12:56:21,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-21 12:56:21,418 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-07-21 12:56:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:21,419 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-21 12:56:21,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 12:56:21,419 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-21 12:56:21,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 12:56:21,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:21,424 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 12:56:21,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:21,638 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:21,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1571291849, now seen corresponding path program 1 times [2020-07-21 12:56:21,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:21,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77325742] [2020-07-21 12:56:21,639 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 12:56:21,675 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:21,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:21,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:56:21,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:21,707 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 12:56:21,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:21,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77325742] [2020-07-21 12:56:21,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:21,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:56:21,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819059816] [2020-07-21 12:56:21,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:56:21,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:21,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:56:21,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:56:21,711 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-07-21 12:56:21,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:21,778 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-07-21 12:56:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:56:21,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-21 12:56:21,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:21,781 INFO L225 Difference]: With dead ends: 42 [2020-07-21 12:56:21,781 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 12:56:21,783 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 12:56:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 12:56:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 12:56:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 12:56:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-07-21 12:56:21,794 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-07-21 12:56:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:21,795 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-07-21 12:56:21,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:56:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-07-21 12:56:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 12:56:21,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:21,798 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 12:56:21,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:22,000 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:22,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1610221656, now seen corresponding path program 1 times [2020-07-21 12:56:22,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:22,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374930097] [2020-07-21 12:56:22,002 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 12:56:22,032 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:22,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:22,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 12:56:22,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:22,176 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 12:56:22,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:22,197 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 1] term [2020-07-21 12:56:22,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:22,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:22,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:56:22,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 12:56:22,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:22,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:22,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:22,808 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 12:56:22,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374930097] [2020-07-21 12:56:22,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:22,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-07-21 12:56:22,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570812581] [2020-07-21 12:56:22,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 12:56:22,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:22,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 12:56:22,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-07-21 12:56:22,811 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 19 states. [2020-07-21 12:56:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:23,133 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-07-21 12:56:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:56:23,133 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2020-07-21 12:56:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:23,135 INFO L225 Difference]: With dead ends: 42 [2020-07-21 12:56:23,135 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 12:56:23,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-07-21 12:56:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 12:56:23,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-07-21 12:56:23,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 12:56:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-07-21 12:56:23,144 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2020-07-21 12:56:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:23,144 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-07-21 12:56:23,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 12:56:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-07-21 12:56:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 12:56:23,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:23,146 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 12:56:23,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:23,350 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:23,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:23,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1417612799, now seen corresponding path program 1 times [2020-07-21 12:56:23,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:23,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010832490] [2020-07-21 12:56:23,353 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 12:56:23,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:23,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:23,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 12:56:23,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:23,570 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 12:56:23,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:24,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:24,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:24,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:24,555 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 12:56:24,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010832490] [2020-07-21 12:56:24,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:24,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2020-07-21 12:56:24,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938389965] [2020-07-21 12:56:24,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 12:56:24,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:24,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 12:56:24,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-07-21 12:56:24,559 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 28 states. [2020-07-21 12:56:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:24,561 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-07-21 12:56:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 12:56:24,562 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-07-21 12:56:24,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:24,562 INFO L225 Difference]: With dead ends: 33 [2020-07-21 12:56:24,562 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 12:56:24,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-07-21 12:56:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 12:56:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 12:56:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 12:56:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 12:56:24,565 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-07-21 12:56:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:24,565 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 12:56:24,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 12:56:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 12:56:24,565 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 12:56:24,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:24,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 12:56:24,851 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 12:56:24,851 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:56:24,852 INFO L271 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: true [2020-07-21 12:56:24,852 INFO L268 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-07-21 12:56:24,852 INFO L268 CegarLoopResult]: For program point L29(lines 29 33) no Hoare annotation was computed. [2020-07-21 12:56:24,852 INFO L268 CegarLoopResult]: For program point isEvenEXIT(lines 26 34) no Hoare annotation was computed. [2020-07-21 12:56:24,852 INFO L268 CegarLoopResult]: For program point L27(lines 27 33) no Hoare annotation was computed. [2020-07-21 12:56:24,852 INFO L268 CegarLoopResult]: For program point isEvenFINAL(lines 26 34) no Hoare annotation was computed. [2020-07-21 12:56:24,852 INFO L271 CegarLoopResult]: At program point isEvenENTRY(lines 26 34) the Hoare annotation is: true [2020-07-21 12:56:24,853 INFO L268 CegarLoopResult]: For program point L17(lines 17 23) no Hoare annotation was computed. [2020-07-21 12:56:24,853 INFO L268 CegarLoopResult]: For program point isOddFINAL(lines 16 24) no Hoare annotation was computed. [2020-07-21 12:56:24,853 INFO L271 CegarLoopResult]: At program point isOddENTRY(lines 16 24) the Hoare annotation is: true [2020-07-21 12:56:24,853 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-07-21 12:56:24,853 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-21 12:56:24,853 INFO L268 CegarLoopResult]: For program point isOddEXIT(lines 16 24) no Hoare annotation was computed. [2020-07-21 12:56:24,853 INFO L268 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-07-21 12:56:24,854 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:56:24,854 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: false [2020-07-21 12:56:24,854 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 12:56:24,856 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 12:56:24,857 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 47) no Hoare annotation was computed. [2020-07-21 12:56:24,857 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 37 49) the Hoare annotation is: true [2020-07-21 12:56:24,857 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 37 49) no Hoare annotation was computed. [2020-07-21 12:56:24,857 INFO L268 CegarLoopResult]: For program point L47(line 47) no Hoare annotation was computed. [2020-07-21 12:56:24,857 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 37 49) no Hoare annotation was computed. [2020-07-21 12:56:24,857 INFO L268 CegarLoopResult]: For program point L44(lines 44 48) no Hoare annotation was computed. [2020-07-21 12:56:24,858 INFO L271 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: true [2020-07-21 12:56:24,858 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-07-21 12:56:24,858 INFO L268 CegarLoopResult]: For program point L39(lines 39 41) no Hoare annotation was computed. [2020-07-21 12:56:24,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:56:24 BoogieIcfgContainer [2020-07-21 12:56:24,871 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 12:56:24,875 INFO L168 Benchmark]: Toolchain (without parser) took 6358.04 ms. Allocated memory was 136.8 MB in the beginning and 249.6 MB in the end (delta: 112.7 MB). Free memory was 100.1 MB in the beginning and 103.9 MB in the end (delta: -3.8 MB). Peak memory consumption was 109.0 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:24,878 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 136.8 MB. Free memory was 118.7 MB in the beginning and 118.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 12:56:24,878 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.70 ms. Allocated memory is still 136.8 MB. Free memory was 99.7 MB in the beginning and 90.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:24,886 INFO L168 Benchmark]: Boogie Preprocessor took 120.01 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.0 MB in the beginning and 179.2 MB in the end (delta: -89.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:24,887 INFO L168 Benchmark]: RCFGBuilder took 302.01 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 166.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:24,888 INFO L168 Benchmark]: TraceAbstraction took 5675.55 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 165.6 MB in the beginning and 103.9 MB in the end (delta: 61.7 MB). Peak memory consumption was 110.4 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:24,900 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 136.8 MB. Free memory was 118.7 MB in the beginning and 118.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.70 ms. Allocated memory is still 136.8 MB. Free memory was 99.7 MB in the beginning and 90.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.01 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.0 MB in the beginning and 179.2 MB in the end (delta: -89.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 302.01 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 166.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5675.55 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 165.6 MB in the beginning and 103.9 MB in the end (delta: 61.7 MB). Peak memory consumption was 110.4 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: 5.5s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 136 SDtfs, 69 SDslu, 619 SDs, 0 SdLazy, 452 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 239 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.5s 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, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 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, 2.4s InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 221 ConstructedInterpolants, 1 QuantifiedInterpolants, 26159 SizeOfPredicates, 30 NumberOfNonLiveVariables, 398 ConjunctsInSsa, 125 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 17/38 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...