/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:35:30,835 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 13:35:30,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:35:30,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:35:30,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:35:30,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:35:30,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:35:30,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:35:30,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:35:30,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:35:30,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:35:30,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:35:30,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:35:30,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:35:30,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:35:30,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:35:30,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:35:30,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:35:30,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:35:30,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:35:30,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:35:30,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:35:30,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:35:30,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:35:30,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:35:30,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:35:30,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:35:30,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:35:30,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:35:30,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:35:30,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:35:30,915 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:35:30,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:35:30,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:35:30,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:35:30,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:35:30,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:35:30,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:35:30,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:35:30,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:35:30,917 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:35:30,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:35:30,918 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:35:30,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:35:30,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:35:30,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:35:30,918 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:35:30,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:35:30,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:35:30,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:35:30,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:35:30,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:35:30,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:35:30,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:30,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:35:30,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:35:30,920 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 -> 4 [2020-07-20 13:35:31,251 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:35:31,267 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:35:31,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:35:31,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:35:31,274 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:35:31,274 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-07-20 13:35:31,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63900e9d1/886d730bb3ca45a9bd8d6d0d154c2e79/FLAGbf50172d7 [2020-07-20 13:35:31,839 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:35:31,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-07-20 13:35:31,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63900e9d1/886d730bb3ca45a9bd8d6d0d154c2e79/FLAGbf50172d7 [2020-07-20 13:35:32,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63900e9d1/886d730bb3ca45a9bd8d6d0d154c2e79 [2020-07-20 13:35:32,188 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:35:32,192 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:35:32,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:35:32,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:35:32,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:35:32,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:35:32" (1/1) ... [2020-07-20 13:35:32,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c5380d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:32, skipping insertion in model container [2020-07-20 13:35:32,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:35:32" (1/1) ... [2020-07-20 13:35:32,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:35:32,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:35:32,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:35:32,519 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:35:32,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:35:32,560 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:35:32,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:32 WrapperNode [2020-07-20 13:35:32,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:35:32,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:35:32,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:35:32,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:35:32,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:32" (1/1) ... [2020-07-20 13:35:32,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:32" (1/1) ... [2020-07-20 13:35:32,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:32" (1/1) ... [2020-07-20 13:35:32,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:32" (1/1) ... [2020-07-20 13:35:32,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:32" (1/1) ... [2020-07-20 13:35:32,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:32" (1/1) ... [2020-07-20 13:35:32,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:32" (1/1) ... [2020-07-20 13:35:32,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:35:32,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:35:32,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:35:32,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:35:32,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:35:32,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:35:32,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:35:32,839 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 13:35:32,839 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-07-20 13:35:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:35:32,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 13:35:32,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:35:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 13:35:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-07-20 13:35:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:35:32,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:35:32,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:35:33,072 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:35:33,073 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:35:33,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:35:33 BoogieIcfgContainer [2020-07-20 13:35:33,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:35:33,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:35:33,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:35:33,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:35:33,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:35:32" (1/3) ... [2020-07-20 13:35:33,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@866f1af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:35:33, skipping insertion in model container [2020-07-20 13:35:33,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:32" (2/3) ... [2020-07-20 13:35:33,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@866f1af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:35:33, skipping insertion in model container [2020-07-20 13:35:33,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:35:33" (3/3) ... [2020-07-20 13:35:33,090 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2020-07-20 13:35:33,108 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:35:33,128 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:35:33,168 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:35:33,238 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:35:33,238 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:35:33,239 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:35:33,239 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:35:33,244 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:35:33,244 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:35:33,244 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:35:33,244 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:35:33,273 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-20 13:35:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 13:35:33,282 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:33,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:33,284 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:33,293 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-07-20 13:35:33,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:33,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821066226] [2020-07-20 13:35:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 13:35:33,392 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:33,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:33,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:35:33,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:35:33,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:35:33,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821066226] [2020-07-20 13:35:33,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:35:33,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:35:33,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447842741] [2020-07-20 13:35:33,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:35:33,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:33,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:35:33,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:35:33,515 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-07-20 13:35:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:33,590 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-20 13:35:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:35:33,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 13:35:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:33,604 INFO L225 Difference]: With dead ends: 40 [2020-07-20 13:35:33,604 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 13:35:33,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:35:33,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 13:35:33,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-20 13:35:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 13:35:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-07-20 13:35:33,666 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-07-20 13:35:33,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:33,666 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-07-20 13:35:33,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:35:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-07-20 13:35:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 13:35:33,677 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:33,685 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] [2020-07-20 13:35:33,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:33,887 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:33,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:33,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-07-20 13:35:33,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:33,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963406551] [2020-07-20 13:35:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 13:35:33,946 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:33,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:33,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:35:33,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:35:33,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:35:33,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963406551] [2020-07-20 13:35:33,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:35:33,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:35:33,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397340574] [2020-07-20 13:35:33,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:35:33,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:33,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:35:33,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:35:33,986 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-07-20 13:35:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:34,011 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-07-20 13:35:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:35:34,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 13:35:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:34,014 INFO L225 Difference]: With dead ends: 32 [2020-07-20 13:35:34,014 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 13:35:34,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:35:34,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 13:35:34,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 13:35:34,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 13:35:34,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-07-20 13:35:34,024 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-07-20 13:35:34,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:34,025 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-07-20 13:35:34,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:35:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-07-20 13:35:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 13:35:34,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:34,027 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] [2020-07-20 13:35:34,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:34,233 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-07-20 13:35:34,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:34,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086955033] [2020-07-20 13:35:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 13:35:34,271 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:34,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:34,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:35:34,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:35:34,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:35:34,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086955033] [2020-07-20 13:35:34,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:35:34,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 13:35:34,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292690720] [2020-07-20 13:35:34,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 13:35:34,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:34,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 13:35:34,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:35:34,376 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-07-20 13:35:34,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:34,474 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-20 13:35:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:35:34,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-07-20 13:35:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:34,478 INFO L225 Difference]: With dead ends: 48 [2020-07-20 13:35:34,478 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 13:35:34,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:35:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 13:35:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 13:35:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:35:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-20 13:35:34,494 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-07-20 13:35:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:34,494 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-20 13:35:34,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 13:35:34,495 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-20 13:35:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:35:34,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:34,500 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] [2020-07-20 13:35:34,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:34,715 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:34,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-07-20 13:35:34,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:34,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211623946] [2020-07-20 13:35:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 13:35:34,751 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:34,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:34,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:35:34,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 13:35:34,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:35:34,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211623946] [2020-07-20 13:35:34,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:35:34,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:35:34,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897930955] [2020-07-20 13:35:34,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:35:34,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:35:34,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:35:34,789 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-07-20 13:35:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:34,815 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-07-20 13:35:34,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:35:34,816 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-20 13:35:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:34,817 INFO L225 Difference]: With dead ends: 50 [2020-07-20 13:35:34,817 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 13:35:34,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:35:34,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 13:35:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-07-20 13:35:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 13:35:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-07-20 13:35:34,830 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-07-20 13:35:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:34,830 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-07-20 13:35:34,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:35:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-07-20 13:35:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:35:34,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:34,832 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] [2020-07-20 13:35:35,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:35,047 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:35,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-07-20 13:35:35,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:35,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504601080] [2020-07-20 13:35:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 13:35:35,086 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:35,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:35,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 13:35:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 13:35:35,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 13:35:35,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504601080] [2020-07-20 13:35:35,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:35,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-20 13:35:35,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086532390] [2020-07-20 13:35:35,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:35:35,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:35,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:35:35,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:35:35,594 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 20 states. [2020-07-20 13:35:35,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:35,857 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-07-20 13:35:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 13:35:35,858 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-07-20 13:35:35,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:35,859 INFO L225 Difference]: With dead ends: 54 [2020-07-20 13:35:35,859 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:35:35,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:35:35,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:35:35,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:35:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:35:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:35:35,863 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-07-20 13:35:35,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:35,863 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:35:35,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:35:35,866 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:35:35,866 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:35:36,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:36,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:35:36,129 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:35:36,129 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:35:36,129 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-20 13:35:36,130 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-07-20 13:35:36,130 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-07-20 13:35:36,130 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-07-20 13:35:36,130 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-07-20 13:35:36,130 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-07-20 13:35:36,130 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-07-20 13:35:36,131 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:35:36,131 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:35:36,131 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:35:36,131 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:35:36,131 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-07-20 13:35:36,131 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-07-20 13:35:36,132 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-07-20 13:35:36,132 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-07-20 13:35:36,132 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-07-20 13:35:36,132 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-07-20 13:35:36,132 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-20 13:35:36,132 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-07-20 13:35:36,133 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-07-20 13:35:36,133 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-20 13:35:36,133 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-07-20 13:35:36,133 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-07-20 13:35:36,133 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 13:35:36,133 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-07-20 13:35:36,133 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-07-20 13:35:36,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:35:36 BoogieIcfgContainer [2020-07-20 13:35:36,141 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:35:36,144 INFO L168 Benchmark]: Toolchain (without parser) took 3952.67 ms. Allocated memory was 137.9 MB in the beginning and 236.5 MB in the end (delta: 98.6 MB). Free memory was 102.9 MB in the beginning and 129.0 MB in the end (delta: -26.2 MB). Peak memory consumption was 72.4 MB. Max. memory is 7.1 GB. [2020-07-20 13:35:36,145 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 13:35:36,145 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.09 ms. Allocated memory is still 137.9 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:35:36,146 INFO L168 Benchmark]: Boogie Preprocessor took 49.52 ms. Allocated memory is still 137.9 MB. Free memory was 93.0 MB in the beginning and 91.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:35:36,147 INFO L168 Benchmark]: RCFGBuilder took 465.23 ms. Allocated memory was 137.9 MB in the beginning and 205.0 MB in the end (delta: 67.1 MB). Free memory was 91.3 MB in the beginning and 171.3 MB in the end (delta: -80.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:35:36,148 INFO L168 Benchmark]: TraceAbstraction took 3060.59 ms. Allocated memory was 205.0 MB in the beginning and 236.5 MB in the end (delta: 31.5 MB). Free memory was 170.3 MB in the beginning and 129.0 MB in the end (delta: 41.3 MB). Peak memory consumption was 72.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:35:36,153 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 368.09 ms. Allocated memory is still 137.9 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.52 ms. Allocated memory is still 137.9 MB. Free memory was 93.0 MB in the beginning and 91.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 465.23 ms. Allocated memory was 137.9 MB in the beginning and 205.0 MB in the end (delta: 67.1 MB). Free memory was 91.3 MB in the beginning and 171.3 MB in the end (delta: -80.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3060.59 ms. Allocated memory was 205.0 MB in the beginning and 236.5 MB in the end (delta: 31.5 MB). Free memory was 170.3 MB in the beginning and 129.0 MB in the end (delta: 41.3 MB). Peak memory consumption was 72.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: 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, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 138 SDtfs, 18 SDslu, 690 SDs, 0 SdLazy, 175 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, 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, 5 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 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, 0.7s InterpolantComputationTime, 107 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 5890 SizeOfPredicates, 8 NumberOfNonLiveVariables, 230 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 8/12 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...