/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 DAGSIZE --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-simple/id2_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:43:39,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:43:39,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:43:39,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 19:43:39,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:43:39,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:43:39,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:43:39,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:43:39,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:43:39,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:43:39,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:43:39,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:43:39,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:43:39,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:43:39,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:43:39,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:43:39,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:43:39,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:43:39,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:43:39,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:43:39,979 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 19:43:39,995 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:43:39,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:43:39,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:43:39,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:43:39,997 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:43:39,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:43:39,997 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:43:39,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:43:39,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:43:39,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:43:39,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:43:39,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:43:39,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:43:39,999 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:43:39,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:43:39,999 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:43:39,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:43:40,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:43:40,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:43:40,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:43:40,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:43:40,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:43:40,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:43:40,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:43:40,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:43:40,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:43:40,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:40,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:43:40,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:43:40,002 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 -> DAGSIZE 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 19:43:40,290 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:43:40,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:43:40,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:43:40,308 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:43:40,308 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:43:40,309 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2020-07-21 19:43:40,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdbdc43ae/73ce6a00d28c45df91b09f5168e1b16c/FLAG1f29e6807 [2020-07-21 19:43:40,829 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:43:40,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2020-07-21 19:43:40,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdbdc43ae/73ce6a00d28c45df91b09f5168e1b16c/FLAG1f29e6807 [2020-07-21 19:43:41,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdbdc43ae/73ce6a00d28c45df91b09f5168e1b16c [2020-07-21 19:43:41,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:43:41,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:43:41,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:43:41,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:43:41,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:43:41,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:43:41" (1/1) ... [2020-07-21 19:43:41,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e399e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:41, skipping insertion in model container [2020-07-21 19:43:41,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:43:41" (1/1) ... [2020-07-21 19:43:41,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:43:41,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:43:41,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:43:41,496 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:43:41,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:43:41,526 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:43:41,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:41 WrapperNode [2020-07-21 19:43:41,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:43:41,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:43:41,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:43:41,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:43:41,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:41" (1/1) ... [2020-07-21 19:43:41,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:41" (1/1) ... [2020-07-21 19:43:41,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:41" (1/1) ... [2020-07-21 19:43:41,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:41" (1/1) ... [2020-07-21 19:43:41,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:41" (1/1) ... [2020-07-21 19:43:41,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:41" (1/1) ... [2020-07-21 19:43:41,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:41" (1/1) ... [2020-07-21 19:43:41,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:43:41,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:43:41,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:43:41,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:43:41,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:43:41,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:43:41,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:43:41,745 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-21 19:43:41,745 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-07-21 19:43:41,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:43:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 19:43:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:43:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-21 19:43:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-07-21 19:43:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:43:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:43:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:43:41,936 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:43:41,936 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:43:41,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:43:41 BoogieIcfgContainer [2020-07-21 19:43:41,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:43:41,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:43:41,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:43:41,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:43:41,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:43:41" (1/3) ... [2020-07-21 19:43:41,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5059174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:43:41, skipping insertion in model container [2020-07-21 19:43:41,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:41" (2/3) ... [2020-07-21 19:43:41,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5059174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:43:41, skipping insertion in model container [2020-07-21 19:43:41,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:43:41" (3/3) ... [2020-07-21 19:43:41,947 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b2_o3.c [2020-07-21 19:43:41,957 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:43:41,964 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:43:41,978 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:43:42,002 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:43:42,002 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:43:42,002 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:43:42,002 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:43:42,002 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:43:42,003 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:43:42,003 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:43:42,003 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:43:42,022 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-21 19:43:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:43:42,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:42,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:43:42,032 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:42,039 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-07-21 19:43:42,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:42,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377691782] [2020-07-21 19:43:42,049 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 19:43:42,117 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:43:42,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:42,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 19:43:42,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:42,272 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 19:43:42,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:43:42,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377691782] [2020-07-21 19:43:42,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:43:42,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:43:42,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179261588] [2020-07-21 19:43:42,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:43:42,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:42,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:43:42,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:43:42,312 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-07-21 19:43:42,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:42,370 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-21 19:43:42,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:43:42,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 19:43:42,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:42,388 INFO L225 Difference]: With dead ends: 40 [2020-07-21 19:43:42,388 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 19:43:42,393 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 [2020-07-21 19:43:42,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 19:43:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-21 19:43:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 19:43:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-07-21 19:43:42,448 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-07-21 19:43:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:42,449 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-07-21 19:43:42,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:43:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-07-21 19:43:42,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 19:43:42,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:42,452 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] [2020-07-21 19:43:42,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:42,667 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:42,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:42,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-07-21 19:43:42,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:42,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593831068] [2020-07-21 19:43:42,669 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 19:43:42,705 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:42,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:42,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 19:43:42,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:42,756 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 19:43:42,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:43:42,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593831068] [2020-07-21 19:43:42,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:43:42,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:43:42,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14828861] [2020-07-21 19:43:42,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:43:42,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:42,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:43:42,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:43:42,761 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-07-21 19:43:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:42,783 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-07-21 19:43:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:43:42,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 19:43:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:42,785 INFO L225 Difference]: With dead ends: 32 [2020-07-21 19:43:42,786 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 19:43:42,787 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 [2020-07-21 19:43:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 19:43:42,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 19:43:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 19:43:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-07-21 19:43:42,794 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-07-21 19:43:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:42,795 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-07-21 19:43:42,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:43:42,795 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-07-21 19:43:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 19:43:42,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:42,797 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] [2020-07-21 19:43:43,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:43,011 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:43,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:43,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-07-21 19:43:43,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:43,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748576895] [2020-07-21 19:43:43,014 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 19:43:43,055 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:43,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:43,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 19:43:43,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:43,146 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 19:43:43,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:43:43,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748576895] [2020-07-21 19:43:43,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:43:43,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 19:43:43,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384690411] [2020-07-21 19:43:43,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 19:43:43,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:43,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 19:43:43,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 19:43:43,152 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-07-21 19:43:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:43,239 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-21 19:43:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:43:43,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-07-21 19:43:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:43,242 INFO L225 Difference]: With dead ends: 48 [2020-07-21 19:43:43,242 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 19:43:43,243 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 [2020-07-21 19:43:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 19:43:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 19:43:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:43:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-21 19:43:43,251 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-07-21 19:43:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:43,252 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-21 19:43:43,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 19:43:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-21 19:43:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 19:43:43,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:43,254 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] [2020-07-21 19:43:43,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:43,469 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:43,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-07-21 19:43:43,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:43,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629448360] [2020-07-21 19:43:43,470 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 19:43:43,509 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:43,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:43,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 19:43:43,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 19:43:43,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:43:43,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629448360] [2020-07-21 19:43:43,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:43:43,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:43:43,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325465335] [2020-07-21 19:43:43,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:43:43,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:43,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:43:43,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:43:43,545 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-07-21 19:43:43,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:43,570 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-07-21 19:43:43,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:43:43,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-21 19:43:43,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:43,573 INFO L225 Difference]: With dead ends: 50 [2020-07-21 19:43:43,573 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 19:43:43,574 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 [2020-07-21 19:43:43,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 19:43:43,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-07-21 19:43:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 19:43:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-07-21 19:43:43,581 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-07-21 19:43:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:43,581 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-07-21 19:43:43,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:43:43,582 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-07-21 19:43:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 19:43:43,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:43,583 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] [2020-07-21 19:43:43,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:43,797 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:43,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:43,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-07-21 19:43:43,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:43,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713891325] [2020-07-21 19:43:43,800 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 19:43:43,833 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:43,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:43,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 19:43:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 19:43:43,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:43:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 19:43:44,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713891325] [2020-07-21 19:43:44,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:43:44,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-21 19:43:44,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835717247] [2020-07-21 19:43:44,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:43:44,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:44,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:43:44,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:43:44,308 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 20 states. [2020-07-21 19:43:44,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:44,506 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-07-21 19:43:44,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 19:43:44,507 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-07-21 19:43:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:44,508 INFO L225 Difference]: With dead ends: 56 [2020-07-21 19:43:44,508 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:43:44,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:43:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:43:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:43:44,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:43:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:43:44,513 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-07-21 19:43:44,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:44,513 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:43:44,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:43:44,516 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:43:44,516 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:43:44,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:44,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:43:44,788 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 19:43:44,788 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:43:44,789 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-21 19:43:44,789 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-07-21 19:43:44,789 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-07-21 19:43:44,789 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-07-21 19:43:44,789 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-07-21 19:43:44,789 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-07-21 19:43:44,789 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-07-21 19:43:44,790 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:43:44,790 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 19:43:44,790 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 19:43:44,790 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 19:43:44,790 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-07-21 19:43:44,790 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-07-21 19:43:44,791 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-07-21 19:43:44,791 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-07-21 19:43:44,791 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-07-21 19:43:44,791 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-07-21 19:43:44,791 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 19:43:44,791 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-07-21 19:43:44,791 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-07-21 19:43:44,792 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-21 19:43:44,792 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-07-21 19:43:44,792 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-07-21 19:43:44,792 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 19:43:44,792 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-07-21 19:43:44,792 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-07-21 19:43:44,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:43:44 BoogieIcfgContainer [2020-07-21 19:43:44,798 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:43:44,801 INFO L168 Benchmark]: Toolchain (without parser) took 3577.96 ms. Allocated memory was 144.2 MB in the beginning and 233.3 MB in the end (delta: 89.1 MB). Free memory was 102.4 MB in the beginning and 128.6 MB in the end (delta: -26.1 MB). Peak memory consumption was 63.0 MB. Max. memory is 7.1 GB. [2020-07-21 19:43:44,802 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 19:43:44,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.43 ms. Allocated memory is still 144.2 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 19:43:44,803 INFO L168 Benchmark]: Boogie Preprocessor took 143.73 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 92.6 MB in the beginning and 179.9 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-21 19:43:44,804 INFO L168 Benchmark]: RCFGBuilder took 268.14 ms. Allocated memory is still 201.9 MB. Free memory was 179.9 MB in the beginning and 167.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-07-21 19:43:44,806 INFO L168 Benchmark]: TraceAbstraction took 2857.91 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 167.2 MB in the beginning and 128.6 MB in the end (delta: 38.6 MB). Peak memory consumption was 70.1 MB. Max. memory is 7.1 GB. [2020-07-21 19:43:44,809 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 299.43 ms. Allocated memory is still 144.2 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.73 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 92.6 MB in the beginning and 179.9 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 268.14 ms. Allocated memory is still 201.9 MB. Free memory was 179.9 MB in the beginning and 167.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2857.91 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 167.2 MB in the beginning and 128.6 MB in the end (delta: 38.6 MB). Peak memory consumption was 70.1 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: 2.7s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 14 SDslu, 712 SDs, 0 SdLazy, 160 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 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, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 107 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 9 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...