/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:15:11,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:15:11,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:15:11,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:15:11,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:15:11,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:15:11,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:15:11,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:15:11,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:15:11,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:15:11,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:15:11,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:15:11,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:15:11,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:15:11,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:15:11,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:15:11,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:15:11,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:15:11,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:15:11,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:15:11,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:15:11,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:15:11,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:15:11,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:15:11,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:15:11,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:15:11,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:15:11,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:15:11,499 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 22:15:11,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:15:11,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:15:11,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:15:11,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:15:11,516 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:15:11,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:15:11,517 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:15:11,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:15:11,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:15:11,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:15:11,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:15:11,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:15:11,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:15:11,518 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:15:11,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:15:11,518 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:15:11,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:15:11,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:15:11,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:15:11,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:15:11,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:15:11,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:15:11,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:15:11,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:15:11,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:15:11,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:15:11,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:15:11,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:15:11,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:15:11,521 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 -> 4 [2020-07-20 22:15:11,828 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:15:11,844 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:15:11,847 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:15:11,849 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:15:11,850 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:15:11,850 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-07-20 22:15:11,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8eaec0f3/8e5557fed4f0473dbd7532737379d9cb/FLAG451e0cc87 [2020-07-20 22:15:12,464 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:15:12,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/lu.cmp.c [2020-07-20 22:15:12,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8eaec0f3/8e5557fed4f0473dbd7532737379d9cb/FLAG451e0cc87 [2020-07-20 22:15:12,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8eaec0f3/8e5557fed4f0473dbd7532737379d9cb [2020-07-20 22:15:12,782 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:15:12,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:15:12,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:15:12,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:15:12,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:15:12,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:15:12" (1/1) ... [2020-07-20 22:15:12,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@158c267f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:12, skipping insertion in model container [2020-07-20 22:15:12,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:15:12" (1/1) ... [2020-07-20 22:15:12,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:15:12,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:15:13,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:15:13,062 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:15:13,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:15:13,230 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:15:13,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:13 WrapperNode [2020-07-20 22:15:13,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:15:13,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:15:13,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:15:13,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:15:13,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:13" (1/1) ... [2020-07-20 22:15:13,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:13" (1/1) ... [2020-07-20 22:15:13,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:13" (1/1) ... [2020-07-20 22:15:13,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:13" (1/1) ... [2020-07-20 22:15:13,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:13" (1/1) ... [2020-07-20 22:15:13,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:13" (1/1) ... [2020-07-20 22:15:13,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:13" (1/1) ... [2020-07-20 22:15:13,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:15:13,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:15:13,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:15:13,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:15:13,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:13" (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 22:15:13,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:15:13,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:15:13,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:15:13,378 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-07-20 22:15:13,378 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:15:13,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-07-20 22:15:13,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:15:13,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:15:13,379 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-07-20 22:15:13,379 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-07-20 22:15:13,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:15:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 22:15:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 22:15:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 22:15:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:15:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:15:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:15:13,902 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:15:13,902 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-20 22:15:13,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:15:13 BoogieIcfgContainer [2020-07-20 22:15:13,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:15:13,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:15:13,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:15:13,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:15:13,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:15:12" (1/3) ... [2020-07-20 22:15:13,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6579fba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:15:13, skipping insertion in model container [2020-07-20 22:15:13,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:13" (2/3) ... [2020-07-20 22:15:13,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6579fba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:15:13, skipping insertion in model container [2020-07-20 22:15:13,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:15:13" (3/3) ... [2020-07-20 22:15:13,916 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-07-20 22:15:13,926 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:15:13,934 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:15:13,945 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:15:13,967 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:15:13,967 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:15:13,967 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:15:13,968 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:15:13,968 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:15:13,968 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:15:13,968 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:15:13,969 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:15:13,990 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-07-20 22:15:13,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 22:15:13,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:15:13,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:15:13,999 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:15:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:15:14,007 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-07-20 22:15:14,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:15:14,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739905539] [2020-07-20 22:15:14,017 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 22:15:14,133 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:15:14,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:15:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:15:14,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:15:14,201 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:15:14,255 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 22:15:14,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:15:14,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739905539] [2020-07-20 22:15:14,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:15:14,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:15:14,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121025086] [2020-07-20 22:15:14,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:15:14,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:15:14,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:15:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:15:14,291 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 5 states. [2020-07-20 22:15:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:15:14,450 INFO L93 Difference]: Finished difference Result 138 states and 203 transitions. [2020-07-20 22:15:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:15:14,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 22:15:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:15:14,459 INFO L225 Difference]: With dead ends: 138 [2020-07-20 22:15:14,460 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 22:15:14,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:15:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 22:15:14,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 22:15:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 22:15:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-20 22:15:14,503 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 12 [2020-07-20 22:15:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:15:14,504 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-20 22:15:14,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:15:14,504 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-20 22:15:14,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 22:15:14,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:15:14,506 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:15:14,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:15:14,721 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:15:14,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:15:14,722 INFO L82 PathProgramCache]: Analyzing trace with hash 92366603, now seen corresponding path program 1 times [2020-07-20 22:15:14,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:15:14,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494569026] [2020-07-20 22:15:14,723 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 22:15:14,808 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:15:14,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:15:14,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:15:14,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:15:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 22:15:14,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:15:14,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494569026] [2020-07-20 22:15:14,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:15:14,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:15:14,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562252867] [2020-07-20 22:15:14,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:15:14,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:15:14,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:15:14,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:15:14,862 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 4 states. [2020-07-20 22:15:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:15:14,895 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-07-20 22:15:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:15:14,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 22:15:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:15:14,899 INFO L225 Difference]: With dead ends: 57 [2020-07-20 22:15:14,900 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 22:15:14,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:15:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 22:15:14,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-07-20 22:15:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 22:15:14,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-20 22:15:14,909 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 21 [2020-07-20 22:15:14,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:15:14,910 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-20 22:15:14,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:15:14,910 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-20 22:15:14,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 22:15:14,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:15:14,912 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:15:15,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:15:15,120 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:15:15,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:15:15,121 INFO L82 PathProgramCache]: Analyzing trace with hash 865519403, now seen corresponding path program 1 times [2020-07-20 22:15:15,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:15:15,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607139879] [2020-07-20 22:15:15,122 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 22:15:15,193 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:15:15,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:15:15,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:15:15,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:15:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 22:15:15,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:15:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 22:15:15,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607139879] [2020-07-20 22:15:15,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:15:15,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 22:15:15,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051014002] [2020-07-20 22:15:15,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:15:15,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:15:15,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:15:15,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:15:15,324 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-07-20 22:15:15,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:15:15,411 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2020-07-20 22:15:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:15:15,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-20 22:15:15,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:15:15,413 INFO L225 Difference]: With dead ends: 76 [2020-07-20 22:15:15,413 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 22:15:15,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-20 22:15:15,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 22:15:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-20 22:15:15,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 22:15:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-07-20 22:15:15,425 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 29 [2020-07-20 22:15:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:15:15,425 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-07-20 22:15:15,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:15:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-07-20 22:15:15,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 22:15:15,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:15:15,427 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:15:15,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:15:15,639 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:15:15,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:15:15,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1085865355, now seen corresponding path program 2 times [2020-07-20 22:15:15,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:15:15,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53596062] [2020-07-20 22:15:15,642 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 22:15:15,722 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:15:15,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:15:15,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:15:15,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:15:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-07-20 22:15:15,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:15:15,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53596062] [2020-07-20 22:15:15,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:15:15,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:15:15,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727874587] [2020-07-20 22:15:15,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:15:15,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:15:15,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:15:15,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:15:15,754 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 4 states. [2020-07-20 22:15:15,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:15:15,802 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2020-07-20 22:15:15,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:15:15,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-07-20 22:15:15,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:15:15,805 INFO L225 Difference]: With dead ends: 111 [2020-07-20 22:15:15,805 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 22:15:15,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:15:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 22:15:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2020-07-20 22:15:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 22:15:15,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-07-20 22:15:15,816 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 53 [2020-07-20 22:15:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:15:15,816 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-07-20 22:15:15,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:15:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-07-20 22:15:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 22:15:15,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:15:15,818 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:15:16,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:15:16,032 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:15:16,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:15:16,033 INFO L82 PathProgramCache]: Analyzing trace with hash 192379017, now seen corresponding path program 1 times [2020-07-20 22:15:16,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:15:16,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105697351] [2020-07-20 22:15:16,034 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 22:15:16,211 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:15:16,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:15:16,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:15:16,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:15:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-07-20 22:15:16,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:15:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-20 22:15:16,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105697351] [2020-07-20 22:15:16,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:15:16,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 22:15:16,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258849807] [2020-07-20 22:15:16,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 22:15:16,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:15:16,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 22:15:16,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2020-07-20 22:15:16,413 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 14 states. [2020-07-20 22:15:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:15:16,511 INFO L93 Difference]: Finished difference Result 104 states and 126 transitions. [2020-07-20 22:15:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 22:15:16,512 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-07-20 22:15:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:15:16,514 INFO L225 Difference]: With dead ends: 104 [2020-07-20 22:15:16,514 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 22:15:16,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-07-20 22:15:16,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 22:15:16,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-20 22:15:16,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 22:15:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-07-20 22:15:16,535 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 53 [2020-07-20 22:15:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:15:16,536 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-07-20 22:15:16,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 22:15:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-07-20 22:15:16,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 22:15:16,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:15:16,540 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:15:16,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:15:16,757 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:15:16,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:15:16,758 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 2 times [2020-07-20 22:15:16,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:15:16,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996927456] [2020-07-20 22:15:16,759 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:15:17,171 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:15:17,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:15:17,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:15:17,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:15:17,215 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:15:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 158 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-07-20 22:15:17,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:15:17,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:15:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 158 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-07-20 22:15:17,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996927456] [2020-07-20 22:15:17,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:15:17,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 22:15:17,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739704508] [2020-07-20 22:15:17,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:15:17,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:15:17,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:15:17,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:15:17,322 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 8 states. [2020-07-20 22:15:17,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:15:17,395 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2020-07-20 22:15:17,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:15:17,395 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-20 22:15:17,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:15:17,396 INFO L225 Difference]: With dead ends: 72 [2020-07-20 22:15:17,396 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:15:17,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 22:15:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:15:17,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:15:17,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:15:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:15:17,398 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2020-07-20 22:15:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:15:17,398 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:15:17,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:15:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:15:17,399 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:15:17,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:15:17,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:15:17,823 INFO L271 CegarLoopResult]: At program point L118(line 118) the Hoare annotation is: true [2020-07-20 22:15:17,823 INFO L268 CegarLoopResult]: For program point L118-1(line 118) no Hoare annotation was computed. [2020-07-20 22:15:17,823 INFO L268 CegarLoopResult]: For program point L127-2(lines 127 133) no Hoare annotation was computed. [2020-07-20 22:15:17,823 INFO L271 CegarLoopResult]: At program point L127-3(lines 127 133) the Hoare annotation is: true [2020-07-20 22:15:17,823 INFO L268 CegarLoopResult]: For program point L119-2(lines 119 126) no Hoare annotation was computed. [2020-07-20 22:15:17,824 INFO L271 CegarLoopResult]: At program point L119-3(lines 119 126) the Hoare annotation is: true [2020-07-20 22:15:17,824 INFO L268 CegarLoopResult]: For program point L119-4(lines 119 126) no Hoare annotation was computed. [2020-07-20 22:15:17,824 INFO L268 CegarLoopResult]: For program point L144-2(lines 144 150) no Hoare annotation was computed. [2020-07-20 22:15:17,824 INFO L271 CegarLoopResult]: At program point L144-3(lines 144 150) the Hoare annotation is: true [2020-07-20 22:15:17,824 INFO L268 CegarLoopResult]: For program point L144-4(lines 144 150) no Hoare annotation was computed. [2020-07-20 22:15:17,824 INFO L268 CegarLoopResult]: For program point L136-2(lines 136 142) no Hoare annotation was computed. [2020-07-20 22:15:17,824 INFO L271 CegarLoopResult]: At program point L136-3(lines 136 142) the Hoare annotation is: true [2020-07-20 22:15:17,825 INFO L268 CegarLoopResult]: For program point L136-4(lines 136 142) no Hoare annotation was computed. [2020-07-20 22:15:17,825 INFO L268 CegarLoopResult]: For program point ludcmpEXIT(lines 109 153) no Hoare annotation was computed. [2020-07-20 22:15:17,825 INFO L271 CegarLoopResult]: At program point ludcmpENTRY(lines 109 153) the Hoare annotation is: true [2020-07-20 22:15:17,825 INFO L268 CegarLoopResult]: For program point ludcmpFINAL(lines 109 153) no Hoare annotation was computed. [2020-07-20 22:15:17,825 INFO L268 CegarLoopResult]: For program point L130-2(lines 130 131) no Hoare annotation was computed. [2020-07-20 22:15:17,825 INFO L271 CegarLoopResult]: At program point L130-3(lines 130 131) the Hoare annotation is: true [2020-07-20 22:15:17,825 INFO L268 CegarLoopResult]: For program point L130-4(lines 130 131) no Hoare annotation was computed. [2020-07-20 22:15:17,826 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-07-20 22:15:17,826 INFO L268 CegarLoopResult]: For program point L122-1(lines 122 124) no Hoare annotation was computed. [2020-07-20 22:15:17,826 INFO L268 CegarLoopResult]: For program point L147-2(lines 147 148) no Hoare annotation was computed. [2020-07-20 22:15:17,826 INFO L271 CegarLoopResult]: At program point L147-3(lines 147 148) the Hoare annotation is: true [2020-07-20 22:15:17,826 INFO L268 CegarLoopResult]: For program point L147-4(lines 147 148) no Hoare annotation was computed. [2020-07-20 22:15:17,826 INFO L268 CegarLoopResult]: For program point L139-2(lines 139 140) no Hoare annotation was computed. [2020-07-20 22:15:17,826 INFO L271 CegarLoopResult]: At program point L139-3(lines 139 140) the Hoare annotation is: true [2020-07-20 22:15:17,827 INFO L268 CegarLoopResult]: For program point L139-4(lines 139 140) no Hoare annotation was computed. [2020-07-20 22:15:17,827 INFO L268 CegarLoopResult]: For program point L123-2(lines 123 124) no Hoare annotation was computed. [2020-07-20 22:15:17,827 INFO L271 CegarLoopResult]: At program point L123-3(lines 123 124) the Hoare annotation is: true [2020-07-20 22:15:17,827 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-07-20 22:15:17,827 INFO L268 CegarLoopResult]: For program point L116-2(lines 116 134) no Hoare annotation was computed. [2020-07-20 22:15:17,827 INFO L271 CegarLoopResult]: At program point L116-3(lines 116 134) the Hoare annotation is: true [2020-07-20 22:15:17,827 INFO L268 CegarLoopResult]: For program point L116-4(lines 116 134) no Hoare annotation was computed. [2020-07-20 22:15:17,828 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:15:17,828 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:15:17,828 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:15:17,828 INFO L268 CegarLoopResult]: For program point L78(lines 78 79) no Hoare annotation was computed. [2020-07-20 22:15:17,828 INFO L268 CegarLoopResult]: For program point L78-2(lines 78 79) no Hoare annotation was computed. [2020-07-20 22:15:17,828 INFO L268 CegarLoopResult]: For program point fabsEXIT(lines 74 81) no Hoare annotation was computed. [2020-07-20 22:15:17,828 INFO L271 CegarLoopResult]: At program point fabsENTRY(lines 74 81) the Hoare annotation is: true [2020-07-20 22:15:17,829 INFO L268 CegarLoopResult]: For program point fabsFINAL(lines 74 81) no Hoare annotation was computed. [2020-07-20 22:15:17,829 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:15:17,829 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:15:17,829 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:15:17,829 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:15:17,829 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-07-20 22:15:17,829 INFO L268 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-07-20 22:15:17,830 INFO L268 CegarLoopResult]: For program point L91-2(lines 91 102) no Hoare annotation was computed. [2020-07-20 22:15:17,830 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 83 107) no Hoare annotation was computed. [2020-07-20 22:15:17,830 INFO L264 CegarLoopResult]: At program point L91-3(lines 91 102) the Hoare annotation is: (and (<= main_~n~0 5) (<= 5 main_~n~0) (< main_~i~0 50)) [2020-07-20 22:15:17,830 INFO L271 CegarLoopResult]: At program point L91-4(lines 91 102) the Hoare annotation is: true [2020-07-20 22:15:17,830 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 83 107) no Hoare annotation was computed. [2020-07-20 22:15:17,830 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-20 22:15:17,830 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-07-20 22:15:17,831 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 83 107) the Hoare annotation is: true [2020-07-20 22:15:17,831 INFO L268 CegarLoopResult]: For program point L94-2(lines 94 99) no Hoare annotation was computed. [2020-07-20 22:15:17,831 INFO L264 CegarLoopResult]: At program point L94-3(lines 94 99) the Hoare annotation is: (and (<= main_~n~0 5) (<= 5 main_~n~0) (<= main_~i~0 5)) [2020-07-20 22:15:17,831 INFO L264 CegarLoopResult]: At program point L94-4(lines 94 99) the Hoare annotation is: (and (<= main_~n~0 5) (<= 5 main_~n~0) (<= main_~i~0 5)) [2020-07-20 22:15:17,831 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-20 22:15:17,831 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-20 22:15:17,832 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 22:15:17,832 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-20 22:15:17,832 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-20 22:15:17,832 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-20 22:15:17,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:15:17 BoogieIcfgContainer [2020-07-20 22:15:17,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:15:17,857 INFO L168 Benchmark]: Toolchain (without parser) took 5072.57 ms. Allocated memory was 144.7 MB in the beginning and 248.5 MB in the end (delta: 103.8 MB). Free memory was 101.4 MB in the beginning and 166.5 MB in the end (delta: -65.2 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:15:17,858 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 22:15:17,859 INFO L168 Benchmark]: CACSL2BoogieTranslator took 444.43 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 101.1 MB in the beginning and 180.5 MB in the end (delta: -79.4 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:15:17,860 INFO L168 Benchmark]: Boogie Preprocessor took 64.70 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 178.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-07-20 22:15:17,861 INFO L168 Benchmark]: RCFGBuilder took 610.61 ms. Allocated memory is still 202.4 MB. Free memory was 177.4 MB in the beginning and 149.6 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2020-07-20 22:15:17,862 INFO L168 Benchmark]: TraceAbstraction took 3946.07 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 149.0 MB in the beginning and 166.5 MB in the end (delta: -17.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:15:17,866 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 444.43 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 101.1 MB in the beginning and 180.5 MB in the end (delta: -79.4 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.70 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 178.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 610.61 ms. Allocated memory is still 202.4 MB. Free memory was 177.4 MB in the beginning and 149.6 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3946.07 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 149.0 MB in the beginning and 166.5 MB in the end (delta: -17.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 116]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 94]: Loop Invariant Derived loop invariant: (n <= 5 && 5 <= n) && i <= 5 - InvariantResult [Line: 127]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 144]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 123]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 139]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 91]: Loop Invariant Derived loop invariant: (n <= 5 && 5 <= n) && i < 50 - InvariantResult [Line: 119]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 130]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 136]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 6, TraceHistogramMax: 12, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 145 SDtfs, 175 SDslu, 396 SDs, 0 SdLazy, 185 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 389 GetRequests, 349 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=5, 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, 6 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 54 PreInvPairs, 94 NumberOfFragments, 48 HoareAnnotationTreeSize, 54 FomulaSimplifications, 241 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 21 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 237 NumberOfCodeBlocks, 158 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 379 ConstructedInterpolants, 0 QuantifiedInterpolants, 45983 SizeOfPredicates, 14 NumberOfNonLiveVariables, 605 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 642/1016 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...