/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:01:03,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:01:03,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:01:03,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:01:03,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:01:03,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:01:03,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:01:03,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:01:03,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:01:03,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:01:03,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:01:03,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:01:03,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:01:03,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:01:03,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:01:03,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:01:03,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:01:03,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:01:03,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:01:03,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:01:03,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:01:03,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:01:03,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:01:03,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:01:03,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:01:03,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:01:03,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:01:03,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:01:03,716 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 14:01:03,733 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:01:03,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:01:03,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:01:03,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:01:03,735 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:01:03,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:01:03,736 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:01:03,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:01:03,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:01:03,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:01:03,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:01:03,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:01:03,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:01:03,737 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:01:03,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:01:03,737 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:01:03,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:01:03,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:01:03,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:01:03,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:01:03,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:01:03,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:01:03,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:01:03,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:01:03,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:01:03,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:01:03,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:03,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:01:03,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:01:03,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:01:04,044 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:01:04,058 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:01:04,062 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:01:04,064 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:01:04,064 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:01:04,065 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-07-21 14:01:04,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc6db169e/50334fcefea84cf4baa5b38668e0c980/FLAG85bc225de [2020-07-21 14:01:04,648 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:01:04,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/lu.cmp.c [2020-07-21 14:01:04,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc6db169e/50334fcefea84cf4baa5b38668e0c980/FLAG85bc225de [2020-07-21 14:01:04,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc6db169e/50334fcefea84cf4baa5b38668e0c980 [2020-07-21 14:01:05,007 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:01:05,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:01:05,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:01:05,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:01:05,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:01:05,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:01:05" (1/1) ... [2020-07-21 14:01:05,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@141bd110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:05, skipping insertion in model container [2020-07-21 14:01:05,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:01:05" (1/1) ... [2020-07-21 14:01:05,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:01:05,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:01:05,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:01:05,319 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:01:05,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:01:05,500 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:01:05,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:05 WrapperNode [2020-07-21 14:01:05,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:01:05,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:01:05,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:01:05,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:01:05,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:05" (1/1) ... [2020-07-21 14:01:05,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:05" (1/1) ... [2020-07-21 14:01:05,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:05" (1/1) ... [2020-07-21 14:01:05,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:05" (1/1) ... [2020-07-21 14:01:05,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:05" (1/1) ... [2020-07-21 14:01:05,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:05" (1/1) ... [2020-07-21 14:01:05,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:05" (1/1) ... [2020-07-21 14:01:05,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:01:05,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:01:05,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:01:05,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:01:05,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:01:05,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:01:05,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:01:05,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:01:05,629 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-07-21 14:01:05,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:01:05,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-07-21 14:01:05,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:01:05,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:01:05,629 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-07-21 14:01:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-07-21 14:01:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:01:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 14:01:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 14:01:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 14:01:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 14:01:05,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:01:05,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:01:06,138 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:01:06,138 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-21 14:01:06,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:01:06 BoogieIcfgContainer [2020-07-21 14:01:06,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:01:06,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:01:06,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:01:06,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:01:06,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:01:05" (1/3) ... [2020-07-21 14:01:06,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210e04e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:01:06, skipping insertion in model container [2020-07-21 14:01:06,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:05" (2/3) ... [2020-07-21 14:01:06,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210e04e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:01:06, skipping insertion in model container [2020-07-21 14:01:06,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:01:06" (3/3) ... [2020-07-21 14:01:06,157 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-07-21 14:01:06,168 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:01:06,176 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:01:06,190 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:01:06,217 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:01:06,217 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:01:06,217 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:01:06,217 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:01:06,218 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:01:06,218 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:01:06,218 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:01:06,218 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:01:06,239 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-07-21 14:01:06,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 14:01:06,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:06,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:06,248 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:06,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:06,259 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-07-21 14:01:06,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:06,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895722248] [2020-07-21 14:01:06,269 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 14:01:06,395 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:06,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:06,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 14:01:06,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:06,428 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 14:01:06,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:06,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895722248] [2020-07-21 14:01:06,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:06,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 14:01:06,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163450142] [2020-07-21 14:01:06,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 14:01:06,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:06,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 14:01:06,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 14:01:06,457 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2020-07-21 14:01:06,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:06,492 INFO L93 Difference]: Finished difference Result 122 states and 178 transitions. [2020-07-21 14:01:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 14:01:06,493 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-21 14:01:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:06,500 INFO L225 Difference]: With dead ends: 122 [2020-07-21 14:01:06,501 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 14:01:06,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 14:01:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 14:01:06,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 14:01:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 14:01:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-21 14:01:06,549 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-07-21 14:01:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:06,550 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-21 14:01:06,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 14:01:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-21 14:01:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 14:01:06,552 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:06,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:06,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:06,767 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:06,768 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-07-21 14:01:06,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:06,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626813687] [2020-07-21 14:01:06,769 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 14:01:06,883 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:01:06,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:06,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:01:06,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:06,928 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 14:01:06,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:06,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626813687] [2020-07-21 14:01:06,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:06,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:01:06,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281257033] [2020-07-21 14:01:06,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:01:06,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:06,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:01:06,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:01:06,933 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-07-21 14:01:06,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:06,981 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-07-21 14:01:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:01:06,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-21 14:01:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:06,983 INFO L225 Difference]: With dead ends: 38 [2020-07-21 14:01:06,983 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 14:01:06,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:01:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 14:01:06,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-07-21 14:01:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 14:01:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-21 14:01:06,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-07-21 14:01:06,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:06,992 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-21 14:01:06,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:01:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-21 14:01:06,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 14:01:06,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:06,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:07,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:07,209 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:07,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:07,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-07-21 14:01:07,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:07,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309159443] [2020-07-21 14:01:07,211 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 14:01:07,266 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:01:07,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:07,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:01:07,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:01:07,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:01:07,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309159443] [2020-07-21 14:01:07,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:01:07,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 14:01:07,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970559308] [2020-07-21 14:01:07,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:01:07,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:07,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:01:07,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:01:07,388 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2020-07-21 14:01:07,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:07,478 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-21 14:01:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 14:01:07,479 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-07-21 14:01:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:07,480 INFO L225 Difference]: With dead ends: 48 [2020-07-21 14:01:07,480 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 14:01:07,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-21 14:01:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 14:01:07,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 14:01:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 14:01:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-21 14:01:07,488 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2020-07-21 14:01:07,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:07,488 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-21 14:01:07,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:01:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-21 14:01:07,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 14:01:07,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:07,490 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:07,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:07,705 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:07,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:07,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1296658810, now seen corresponding path program 2 times [2020-07-21 14:01:07,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:07,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733358901] [2020-07-21 14:01:07,708 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 14:01:07,762 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:01:07,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:07,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:01:07,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 14:01:07,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:07,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733358901] [2020-07-21 14:01:07,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:07,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:01:07,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823684885] [2020-07-21 14:01:07,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:01:07,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:07,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:01:07,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:01:07,791 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 4 states. [2020-07-21 14:01:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:07,875 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-07-21 14:01:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:01:07,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-07-21 14:01:07,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:07,879 INFO L225 Difference]: With dead ends: 87 [2020-07-21 14:01:07,879 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 14:01:07,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:01:07,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 14:01:07,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2020-07-21 14:01:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 14:01:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-21 14:01:07,893 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 28 [2020-07-21 14:01:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:07,894 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-21 14:01:07,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:01:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-21 14:01:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 14:01:07,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:07,895 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:08,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:08,110 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:08,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:08,111 INFO L82 PathProgramCache]: Analyzing trace with hash -479010360, now seen corresponding path program 1 times [2020-07-21 14:01:08,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:08,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389779320] [2020-07-21 14:01:08,112 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 14:01:08,186 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:08,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:08,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 14:01:08,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:01:08,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:01:08,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389779320] [2020-07-21 14:01:08,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:01:08,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 14:01:08,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195008072] [2020-07-21 14:01:08,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 14:01:08,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:08,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 14:01:08,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2020-07-21 14:01:08,391 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 14 states. [2020-07-21 14:01:08,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:08,513 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2020-07-21 14:01:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 14:01:08,513 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-07-21 14:01:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:08,515 INFO L225 Difference]: With dead ends: 71 [2020-07-21 14:01:08,515 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 14:01:08,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-07-21 14:01:08,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 14:01:08,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 14:01:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 14:01:08,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-07-21 14:01:08,531 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 28 [2020-07-21 14:01:08,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:08,531 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-07-21 14:01:08,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 14:01:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-07-21 14:01:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 14:01:08,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:08,533 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:08,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:08,737 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:08,738 INFO L82 PathProgramCache]: Analyzing trace with hash -850791622, now seen corresponding path program 2 times [2020-07-21 14:01:08,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:08,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056410022] [2020-07-21 14:01:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:08,806 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:08,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:08,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:01:08,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:08,827 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:01:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 14:01:08,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:08,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056410022] [2020-07-21 14:01:08,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:08,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:01:08,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424613442] [2020-07-21 14:01:08,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:01:08,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:08,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:01:08,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:01:08,864 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 5 states. [2020-07-21 14:01:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:08,927 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-07-21 14:01:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:01:08,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-07-21 14:01:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:08,930 INFO L225 Difference]: With dead ends: 76 [2020-07-21 14:01:08,930 INFO L226 Difference]: Without dead ends: 74 [2020-07-21 14:01:08,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:01:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-21 14:01:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-07-21 14:01:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 14:01:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-07-21 14:01:08,942 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 36 [2020-07-21 14:01:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:08,943 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-07-21 14:01:08,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:01:08,943 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-07-21 14:01:08,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 14:01:08,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:08,946 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] [2020-07-21 14:01:09,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:09,161 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:09,162 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 1 times [2020-07-21 14:01:09,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:09,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110209927] [2020-07-21 14:01:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:09,386 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:09,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:09,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:01:09,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:09,433 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:01:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 14:01:09,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:09,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:01:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 14:01:09,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110209927] [2020-07-21 14:01:09,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:01:09,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 14:01:09,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919966674] [2020-07-21 14:01:09,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:01:09,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:09,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:01:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:01:09,520 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 8 states. [2020-07-21 14:01:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:09,625 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2020-07-21 14:01:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 14:01:09,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-21 14:01:09,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:09,628 INFO L225 Difference]: With dead ends: 167 [2020-07-21 14:01:09,628 INFO L226 Difference]: Without dead ends: 165 [2020-07-21 14:01:09,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:01:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-21 14:01:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2020-07-21 14:01:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 14:01:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 199 transitions. [2020-07-21 14:01:09,647 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 199 transitions. Word has length 69 [2020-07-21 14:01:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:09,647 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 199 transitions. [2020-07-21 14:01:09,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:01:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 199 transitions. [2020-07-21 14:01:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 14:01:09,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:09,651 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:09,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:09,867 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:09,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1281791738, now seen corresponding path program 2 times [2020-07-21 14:01:09,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:09,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395068115] [2020-07-21 14:01:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:09,956 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:01:09,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:09,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 14:01:09,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 762 proven. 41 refuted. 0 times theorem prover too weak. 1161 trivial. 0 not checked. [2020-07-21 14:01:10,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 756 proven. 41 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2020-07-21 14:01:10,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395068115] [2020-07-21 14:01:10,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:01:10,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 14:01:10,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797996570] [2020-07-21 14:01:10,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:01:10,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:10,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:01:10,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:01:10,142 INFO L87 Difference]: Start difference. First operand 163 states and 199 transitions. Second operand 8 states. [2020-07-21 14:01:10,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:10,242 INFO L93 Difference]: Finished difference Result 338 states and 403 transitions. [2020-07-21 14:01:10,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 14:01:10,243 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 168 [2020-07-21 14:01:10,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:10,248 INFO L225 Difference]: With dead ends: 338 [2020-07-21 14:01:10,249 INFO L226 Difference]: Without dead ends: 217 [2020-07-21 14:01:10,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:01:10,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-07-21 14:01:10,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 163. [2020-07-21 14:01:10,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 14:01:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 197 transitions. [2020-07-21 14:01:10,288 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 197 transitions. Word has length 168 [2020-07-21 14:01:10,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:10,289 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 197 transitions. [2020-07-21 14:01:10,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:01:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 197 transitions. [2020-07-21 14:01:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 14:01:10,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:10,298 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 28, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:10,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:10,500 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:10,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:10,501 INFO L82 PathProgramCache]: Analyzing trace with hash 419958136, now seen corresponding path program 3 times [2020-07-21 14:01:10,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:10,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318398121] [2020-07-21 14:01:10,502 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:10,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:01:10,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:10,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 14:01:10,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1019 proven. 297 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-07-21 14:01:10,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1007 proven. 297 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-21 14:01:10,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318398121] [2020-07-21 14:01:10,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:01:10,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-21 14:01:10,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87093074] [2020-07-21 14:01:10,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 14:01:10,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:10,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 14:01:10,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-21 14:01:10,778 INFO L87 Difference]: Start difference. First operand 163 states and 197 transitions. Second operand 11 states. [2020-07-21 14:01:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:10,991 INFO L93 Difference]: Finished difference Result 303 states and 358 transitions. [2020-07-21 14:01:10,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 14:01:10,991 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 168 [2020-07-21 14:01:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:10,993 INFO L225 Difference]: With dead ends: 303 [2020-07-21 14:01:10,993 INFO L226 Difference]: Without dead ends: 211 [2020-07-21 14:01:10,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-21 14:01:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-21 14:01:11,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2020-07-21 14:01:11,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 14:01:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 194 transitions. [2020-07-21 14:01:11,009 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 194 transitions. Word has length 168 [2020-07-21 14:01:11,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:11,009 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 194 transitions. [2020-07-21 14:01:11,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 14:01:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 194 transitions. [2020-07-21 14:01:11,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 14:01:11,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:11,012 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 27, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:11,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:11,228 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:11,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1916434374, now seen corresponding path program 4 times [2020-07-21 14:01:11,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:11,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000158824] [2020-07-21 14:01:11,231 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:12,691 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:12,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:12,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:01:12,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:12,727 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:01:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 632 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-07-21 14:01:12,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:12,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:01:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 632 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-07-21 14:01:12,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000158824] [2020-07-21 14:01:12,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:01:12,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 14:01:12,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233110976] [2020-07-21 14:01:12,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:01:12,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:12,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:01:12,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:01:12,913 INFO L87 Difference]: Start difference. First operand 163 states and 194 transitions. Second operand 8 states. [2020-07-21 14:01:12,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:12,998 INFO L93 Difference]: Finished difference Result 163 states and 194 transitions. [2020-07-21 14:01:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 14:01:12,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 168 [2020-07-21 14:01:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:13,001 INFO L225 Difference]: With dead ends: 163 [2020-07-21 14:01:13,001 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 14:01:13,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 327 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-21 14:01:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 14:01:13,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 14:01:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 14:01:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 14:01:13,005 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 168 [2020-07-21 14:01:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:13,006 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 14:01:13,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:01:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 14:01:13,007 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 14:01:13,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:13,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 14:01:13,532 INFO L271 CegarLoopResult]: At program point L118(line 118) the Hoare annotation is: true [2020-07-21 14:01:13,532 INFO L268 CegarLoopResult]: For program point L118-1(line 118) no Hoare annotation was computed. [2020-07-21 14:01:13,532 INFO L268 CegarLoopResult]: For program point L127-2(lines 127 133) no Hoare annotation was computed. [2020-07-21 14:01:13,533 INFO L271 CegarLoopResult]: At program point L127-3(lines 127 133) the Hoare annotation is: true [2020-07-21 14:01:13,533 INFO L268 CegarLoopResult]: For program point L119-2(lines 119 126) no Hoare annotation was computed. [2020-07-21 14:01:13,533 INFO L271 CegarLoopResult]: At program point L119-3(lines 119 126) the Hoare annotation is: true [2020-07-21 14:01:13,533 INFO L268 CegarLoopResult]: For program point L119-4(lines 119 126) no Hoare annotation was computed. [2020-07-21 14:01:13,533 INFO L268 CegarLoopResult]: For program point L144-2(lines 144 150) no Hoare annotation was computed. [2020-07-21 14:01:13,533 INFO L271 CegarLoopResult]: At program point L144-3(lines 144 150) the Hoare annotation is: true [2020-07-21 14:01:13,533 INFO L268 CegarLoopResult]: For program point L144-4(lines 144 150) no Hoare annotation was computed. [2020-07-21 14:01:13,534 INFO L268 CegarLoopResult]: For program point L136-2(lines 136 142) no Hoare annotation was computed. [2020-07-21 14:01:13,534 INFO L271 CegarLoopResult]: At program point L136-3(lines 136 142) the Hoare annotation is: true [2020-07-21 14:01:13,534 INFO L268 CegarLoopResult]: For program point L136-4(lines 136 142) no Hoare annotation was computed. [2020-07-21 14:01:13,534 INFO L268 CegarLoopResult]: For program point ludcmpEXIT(lines 109 153) no Hoare annotation was computed. [2020-07-21 14:01:13,534 INFO L271 CegarLoopResult]: At program point ludcmpENTRY(lines 109 153) the Hoare annotation is: true [2020-07-21 14:01:13,534 INFO L268 CegarLoopResult]: For program point ludcmpFINAL(lines 109 153) no Hoare annotation was computed. [2020-07-21 14:01:13,534 INFO L268 CegarLoopResult]: For program point L130-2(lines 130 131) no Hoare annotation was computed. [2020-07-21 14:01:13,534 INFO L271 CegarLoopResult]: At program point L130-3(lines 130 131) the Hoare annotation is: true [2020-07-21 14:01:13,535 INFO L268 CegarLoopResult]: For program point L130-4(lines 130 131) no Hoare annotation was computed. [2020-07-21 14:01:13,535 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-07-21 14:01:13,535 INFO L268 CegarLoopResult]: For program point L122-1(lines 122 124) no Hoare annotation was computed. [2020-07-21 14:01:13,535 INFO L268 CegarLoopResult]: For program point L147-2(lines 147 148) no Hoare annotation was computed. [2020-07-21 14:01:13,535 INFO L271 CegarLoopResult]: At program point L147-3(lines 147 148) the Hoare annotation is: true [2020-07-21 14:01:13,535 INFO L268 CegarLoopResult]: For program point L147-4(lines 147 148) no Hoare annotation was computed. [2020-07-21 14:01:13,535 INFO L268 CegarLoopResult]: For program point L139-2(lines 139 140) no Hoare annotation was computed. [2020-07-21 14:01:13,536 INFO L271 CegarLoopResult]: At program point L139-3(lines 139 140) the Hoare annotation is: true [2020-07-21 14:01:13,536 INFO L268 CegarLoopResult]: For program point L139-4(lines 139 140) no Hoare annotation was computed. [2020-07-21 14:01:13,536 INFO L268 CegarLoopResult]: For program point L123-2(lines 123 124) no Hoare annotation was computed. [2020-07-21 14:01:13,536 INFO L271 CegarLoopResult]: At program point L123-3(lines 123 124) the Hoare annotation is: true [2020-07-21 14:01:13,536 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-07-21 14:01:13,536 INFO L268 CegarLoopResult]: For program point L116-2(lines 116 134) no Hoare annotation was computed. [2020-07-21 14:01:13,536 INFO L271 CegarLoopResult]: At program point L116-3(lines 116 134) the Hoare annotation is: true [2020-07-21 14:01:13,536 INFO L268 CegarLoopResult]: For program point L116-4(lines 116 134) no Hoare annotation was computed. [2020-07-21 14:01:13,537 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 14:01:13,537 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 14:01:13,537 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:01:13,537 INFO L268 CegarLoopResult]: For program point L78(lines 78 79) no Hoare annotation was computed. [2020-07-21 14:01:13,537 INFO L268 CegarLoopResult]: For program point L78-2(lines 78 79) no Hoare annotation was computed. [2020-07-21 14:01:13,537 INFO L268 CegarLoopResult]: For program point fabsEXIT(lines 74 81) no Hoare annotation was computed. [2020-07-21 14:01:13,537 INFO L271 CegarLoopResult]: At program point fabsENTRY(lines 74 81) the Hoare annotation is: true [2020-07-21 14:01:13,538 INFO L268 CegarLoopResult]: For program point fabsFINAL(lines 74 81) no Hoare annotation was computed. [2020-07-21 14:01:13,538 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:01:13,538 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 14:01:13,538 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 14:01:13,538 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 14:01:13,538 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-07-21 14:01:13,538 INFO L268 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-07-21 14:01:13,539 INFO L268 CegarLoopResult]: For program point L91-2(lines 91 102) no Hoare annotation was computed. [2020-07-21 14:01:13,539 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 83 107) no Hoare annotation was computed. [2020-07-21 14:01:13,539 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)) [2020-07-21 14:01:13,539 INFO L271 CegarLoopResult]: At program point L91-4(lines 91 102) the Hoare annotation is: true [2020-07-21 14:01:13,539 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 83 107) no Hoare annotation was computed. [2020-07-21 14:01:13,539 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-21 14:01:13,539 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-07-21 14:01:13,540 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 83 107) the Hoare annotation is: true [2020-07-21 14:01:13,540 INFO L268 CegarLoopResult]: For program point L94-2(lines 94 99) no Hoare annotation was computed. [2020-07-21 14:01:13,540 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)) [2020-07-21 14:01:13,540 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)) [2020-07-21 14:01:13,540 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 14:01:13,540 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 14:01:13,540 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 14:01:13,541 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 14:01:13,541 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 14:01:13,541 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 14:01:13,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:01:13 BoogieIcfgContainer [2020-07-21 14:01:13,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 14:01:13,564 INFO L168 Benchmark]: Toolchain (without parser) took 8554.68 ms. Allocated memory was 144.2 MB in the beginning and 291.0 MB in the end (delta: 146.8 MB). Free memory was 100.7 MB in the beginning and 211.9 MB in the end (delta: -111.1 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:13,565 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 14:01:13,566 INFO L168 Benchmark]: CACSL2BoogieTranslator took 490.16 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 100.3 MB in the beginning and 178.3 MB in the end (delta: -77.9 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:13,567 INFO L168 Benchmark]: Boogie Preprocessor took 59.78 ms. Allocated memory is still 201.9 MB. Free memory was 178.3 MB in the beginning and 175.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:13,568 INFO L168 Benchmark]: RCFGBuilder took 582.11 ms. Allocated memory is still 201.9 MB. Free memory was 175.6 MB in the beginning and 148.4 MB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:13,568 INFO L168 Benchmark]: TraceAbstraction took 7416.68 ms. Allocated memory was 201.9 MB in the beginning and 291.0 MB in the end (delta: 89.1 MB). Free memory was 147.7 MB in the beginning and 211.9 MB in the end (delta: -64.2 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:13,572 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 490.16 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 100.3 MB in the beginning and 178.3 MB in the end (delta: -77.9 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.78 ms. Allocated memory is still 201.9 MB. Free memory was 178.3 MB in the beginning and 175.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 582.11 ms. Allocated memory is still 201.9 MB. Free memory was 175.6 MB in the beginning and 148.4 MB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7416.68 ms. Allocated memory was 201.9 MB in the beginning and 291.0 MB in the end (delta: 89.1 MB). Free memory was 147.7 MB in the beginning and 211.9 MB in the end (delta: -64.2 MB). Peak memory consumption was 25.0 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: 7.0s, OverallIterations: 10, TraceHistogramMax: 30, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 229 SDtfs, 233 SDslu, 466 SDs, 0 SdLazy, 548 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1324 GetRequests, 1256 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 133 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 49 PreInvPairs, 104 NumberOfFragments, 48 HoareAnnotationTreeSize, 49 FomulaSimplifications, 1191 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 21 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 705 NumberOfCodeBlocks, 509 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1306 ConstructedInterpolants, 0 QuantifiedInterpolants, 385742 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1515 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 10206/12522 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...