/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_VARIABLES --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/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:54:08,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:54:08,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:54:08,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:54:08,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:54:08,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:54:08,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:54:08,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:54:08,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:54:08,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:54:08,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:54:08,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:54:08,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:54:08,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:54:08,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:54:08,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:54:08,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:54:08,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:54:08,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:54:08,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:54:08,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:54:08,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:54:08,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:54:08,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:54:08,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:54:08,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:54:08,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:54:08,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:54:08,139 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 17:54:08,152 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:54:08,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:54:08,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:54:08,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:54:08,154 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:54:08,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:54:08,155 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:54:08,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:54:08,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:54:08,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:54:08,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:54:08,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:54:08,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:54:08,156 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:54:08,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:54:08,157 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:54:08,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:54:08,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:54:08,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:54:08,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:54:08,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:54:08,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:54:08,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:54:08,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:54:08,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:54:08,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:54:08,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:54:08,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:54:08,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:54:08,160 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_VARIABLES 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 17:54:08,422 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:54:08,441 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:54:08,445 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:54:08,447 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:54:08,447 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:54:08,448 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-20 17:54:08,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef943c94/e78fff0f9f96466c9aa318265e9bf28d/FLAGb3d5d4e8b [2020-07-20 17:54:08,972 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:54:08,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-20 17:54:08,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef943c94/e78fff0f9f96466c9aa318265e9bf28d/FLAGb3d5d4e8b [2020-07-20 17:54:09,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef943c94/e78fff0f9f96466c9aa318265e9bf28d [2020-07-20 17:54:09,336 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:54:09,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:54:09,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:54:09,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:54:09,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:54:09,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:54:09" (1/1) ... [2020-07-20 17:54:09,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2976d14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:54:09, skipping insertion in model container [2020-07-20 17:54:09,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:54:09" (1/1) ... [2020-07-20 17:54:09,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:54:09,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:54:09,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:54:09,526 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:54:09,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:54:09,559 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:54:09,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:54:09 WrapperNode [2020-07-20 17:54:09,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:54:09,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:54:09,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:54:09,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:54:09,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:54:09" (1/1) ... [2020-07-20 17:54:09,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:54:09" (1/1) ... [2020-07-20 17:54:09,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:54:09" (1/1) ... [2020-07-20 17:54:09,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:54:09" (1/1) ... [2020-07-20 17:54:09,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:54:09" (1/1) ... [2020-07-20 17:54:09,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:54:09" (1/1) ... [2020-07-20 17:54:09,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:54:09" (1/1) ... [2020-07-20 17:54:09,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:54:09,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:54:09,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:54:09,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:54:09,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:54:09" (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 17:54:09,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:54:09,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:54:09,739 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:54:09,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:54:09,739 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:54:09,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:54:09,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:54:09,740 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:54:09,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:54:09,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:54:09,740 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:54:09,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:54:09,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:54:09,952 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:54:09,952 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 17:54:09,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:54:09 BoogieIcfgContainer [2020-07-20 17:54:09,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:54:09,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:54:09,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:54:09,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:54:09,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:54:09" (1/3) ... [2020-07-20 17:54:09,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7c791d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:54:09, skipping insertion in model container [2020-07-20 17:54:09,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:54:09" (2/3) ... [2020-07-20 17:54:09,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7c791d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:54:09, skipping insertion in model container [2020-07-20 17:54:09,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:54:09" (3/3) ... [2020-07-20 17:54:09,966 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-07-20 17:54:09,976 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:54:09,989 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:54:10,015 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:54:10,066 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:54:10,066 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:54:10,066 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:54:10,066 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:54:10,066 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:54:10,067 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:54:10,067 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:54:10,067 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:54:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 17:54:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 17:54:10,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:54:10,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:54:10,113 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:54:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:54:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash 404168940, now seen corresponding path program 1 times [2020-07-20 17:54:10,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:54:10,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037274006] [2020-07-20 17:54:10,129 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 17:54:10,198 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:54:10,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:54:10,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:54:10,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:54:10,249 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:54:10,286 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 17:54:10,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:54:10,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037274006] [2020-07-20 17:54:10,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:54:10,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:54:10,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254803947] [2020-07-20 17:54:10,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:54:10,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:54:10,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:54:10,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:54:10,308 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-20 17:54:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:54:10,417 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2020-07-20 17:54:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:54:10,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 17:54:10,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:54:10,429 INFO L225 Difference]: With dead ends: 57 [2020-07-20 17:54:10,429 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 17:54:10,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 17:54:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 17:54:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 17:54:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 17:54:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-20 17:54:10,480 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-07-20 17:54:10,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:54:10,481 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-20 17:54:10,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:54:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-20 17:54:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 17:54:10,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:54:10,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:54:10,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:54:10,699 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:54:10,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:54:10,700 INFO L82 PathProgramCache]: Analyzing trace with hash -849304486, now seen corresponding path program 1 times [2020-07-20 17:54:10,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:54:10,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564313715] [2020-07-20 17:54:10,702 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 17:54:10,734 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:54:10,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:54:10,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:54:10,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:54:10,766 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:54:10,785 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 17:54:10,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:54:10,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564313715] [2020-07-20 17:54:10,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:54:10,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:54:10,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635931785] [2020-07-20 17:54:10,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:54:10,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:54:10,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:54:10,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:54:10,790 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-07-20 17:54:10,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:54:10,916 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-20 17:54:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:54:10,917 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 17:54:10,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:54:10,919 INFO L225 Difference]: With dead ends: 40 [2020-07-20 17:54:10,919 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 17:54:10,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:54:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 17:54:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-07-20 17:54:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 17:54:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 17:54:10,929 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2020-07-20 17:54:10,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:54:10,930 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 17:54:10,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:54:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 17:54:10,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 17:54:10,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:54:10,931 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:54:11,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:54:11,145 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:54:11,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:54:11,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1573212483, now seen corresponding path program 1 times [2020-07-20 17:54:11,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:54:11,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057720938] [2020-07-20 17:54:11,149 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 17:54:11,183 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:54:11,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:54:11,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:54:11,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:54:11,208 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:54:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:54:11,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:54:11,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057720938] [2020-07-20 17:54:11,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:54:11,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:54:11,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693596073] [2020-07-20 17:54:11,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:54:11,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:54:11,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:54:11,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:54:11,233 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2020-07-20 17:54:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:54:11,299 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-07-20 17:54:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:54:11,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 17:54:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:54:11,302 INFO L225 Difference]: With dead ends: 45 [2020-07-20 17:54:11,302 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 17:54:11,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 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 17:54:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 17:54:11,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-20 17:54:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 17:54:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-20 17:54:11,317 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2020-07-20 17:54:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:54:11,317 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-20 17:54:11,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:54:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-20 17:54:11,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 17:54:11,322 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:54:11,322 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:54:11,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:54:11,536 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:54:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:54:11,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1604756500, now seen corresponding path program 1 times [2020-07-20 17:54:11,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:54:11,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785259138] [2020-07-20 17:54:11,537 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 17:54:11,573 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:54:11,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:54:11,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:54:11,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:54:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 17:54:11,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:54:11,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785259138] [2020-07-20 17:54:11,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:54:11,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:54:11,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973335870] [2020-07-20 17:54:11,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:54:11,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:54:11,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:54:11,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:54:11,599 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 4 states. [2020-07-20 17:54:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:54:11,660 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-07-20 17:54:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:54:11,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-20 17:54:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:54:11,662 INFO L225 Difference]: With dead ends: 68 [2020-07-20 17:54:11,662 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 17:54:11,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:54:11,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 17:54:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 17:54:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 17:54:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-20 17:54:11,672 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 24 [2020-07-20 17:54:11,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:54:11,672 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-20 17:54:11,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:54:11,673 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-20 17:54:11,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 17:54:11,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:54:11,674 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:54:11,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:54:11,889 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:54:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:54:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1598241856, now seen corresponding path program 1 times [2020-07-20 17:54:11,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:54:11,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386137235] [2020-07-20 17:54:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:54:11,916 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:54:11,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:54:11,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:54:11,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:54:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 17:54:11,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:54:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 17:54:12,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386137235] [2020-07-20 17:54:12,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:54:12,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-20 17:54:12,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691960750] [2020-07-20 17:54:12,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:54:12,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:54:12,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:54:12,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:54:12,009 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 6 states. [2020-07-20 17:54:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:54:12,084 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-07-20 17:54:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:54:12,085 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-07-20 17:54:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:54:12,086 INFO L225 Difference]: With dead ends: 79 [2020-07-20 17:54:12,086 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 17:54:12,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:54:12,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 17:54:12,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-07-20 17:54:12,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 17:54:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-07-20 17:54:12,097 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 31 [2020-07-20 17:54:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:54:12,097 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-07-20 17:54:12,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:54:12,098 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-07-20 17:54:12,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 17:54:12,099 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:54:12,099 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:54:12,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:54:12,313 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:54:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:54:12,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2099424040, now seen corresponding path program 1 times [2020-07-20 17:54:12,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:54:12,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467286238] [2020-07-20 17:54:12,314 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 17:54:12,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:54:12,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:54:12,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:54:12,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:54:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 17:54:12,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:54:18,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467286238] [2020-07-20 17:54:18,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 17:54:18,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 17:54:18,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428694992] [2020-07-20 17:54:18,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 17:54:18,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:54:18,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 17:54:18,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=117, Unknown=3, NotChecked=0, Total=156 [2020-07-20 17:54:18,635 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2020-07-20 17:54:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:54:19,054 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2020-07-20 17:54:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 17:54:19,056 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-07-20 17:54:19,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:54:19,059 INFO L225 Difference]: With dead ends: 126 [2020-07-20 17:54:19,059 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 17:54:19,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=124, Invalid=335, Unknown=3, NotChecked=0, Total=462 [2020-07-20 17:54:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 17:54:19,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-07-20 17:54:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 17:54:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-07-20 17:54:19,080 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 34 [2020-07-20 17:54:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:54:19,081 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-07-20 17:54:19,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 17:54:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-07-20 17:54:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 17:54:19,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:54:19,087 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:54:19,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:54:19,289 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:54:19,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:54:19,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1702845076, now seen corresponding path program 2 times [2020-07-20 17:54:19,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:54:19,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970500583] [2020-07-20 17:54:19,291 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 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 [2020-07-20 17:54:19,322 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:54:19,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:54:19,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:54:19,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:54:19,347 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:54:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 17:54:19,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:54:19,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970500583] [2020-07-20 17:54:19,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:54:19,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:54:19,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100444646] [2020-07-20 17:54:19,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:54:19,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:54:19,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:54:19,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:54:19,372 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 6 states. [2020-07-20 17:54:19,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:54:19,463 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-07-20 17:54:19,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:54:19,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-20 17:54:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:54:19,467 INFO L225 Difference]: With dead ends: 57 [2020-07-20 17:54:19,467 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:54:19,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:54:19,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:54:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:54:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:54:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:54:19,469 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2020-07-20 17:54:19,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:54:19,469 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:54:19,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:54:19,469 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:54:19,469 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:54:19,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:54:19,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:54:20,122 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 17:54:20,122 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:54:20,123 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:54:20,123 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 17:54:20,123 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:54:20,123 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:54:20,123 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 17:54:20,123 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 17:54:20,123 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 17:54:20,123 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 17:54:20,123 INFO L268 CegarLoopResult]: For program point L31(lines 23 33) no Hoare annotation was computed. [2020-07-20 17:54:20,123 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 37) no Hoare annotation was computed. [2020-07-20 17:54:20,124 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 33) the Hoare annotation is: (let ((.cse2 (* 2 main_~i~0))) (let ((.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= .cse2 main_~j~0))) (or (and (<= main_~k~0 main_~n~0) .cse0 .cse1) (and (<= main_~k~0 (+ .cse2 1)) (<= main_~k~0 main_~j~0) .cse0 .cse1) (and (<= (+ (div (+ (* main_~n~0 (- 1)) 1) (- 2)) 1) (div main_~j~0 2)) (<= main_~j~0 .cse2) .cse0 .cse1)))) [2020-07-20 17:54:20,124 INFO L268 CegarLoopResult]: For program point L24(lines 24 32) no Hoare annotation was computed. [2020-07-20 17:54:20,124 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 27) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (< main_~j~0 main_~n~0) (<= .cse0 main_~k~0) (<= main_~k~0 main_~n~0) (<= .cse0 main_~j~0))) [2020-07-20 17:54:20,124 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-20 17:54:20,124 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 37) no Hoare annotation was computed. [2020-07-20 17:54:20,124 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (< main_~j~0 main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-20 17:54:20,124 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-07-20 17:54:20,124 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (< main_~j~0 main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-20 17:54:20,125 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (< main_~j~0 main_~n~0) (<= (+ main_~k~0 1) main_~n~0) (<= .cse0 main_~k~0) (<= .cse0 main_~j~0))) [2020-07-20 17:54:20,125 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 27) no Hoare annotation was computed. [2020-07-20 17:54:20,125 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 34) no Hoare annotation was computed. [2020-07-20 17:54:20,125 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 34) the Hoare annotation is: (let ((.cse1 (* 2 main_~i~0)) (.cse0 (<= main_~n~0 main_~k~0)) (.cse2 (<= main_~n~0 main_~j~0))) (or (and (<= main_~k~0 main_~n~0) .cse0) (and (<= main_~k~0 .cse1) .cse0 .cse2) (and (<= (+ (div (+ (* main_~n~0 (- 1)) 1) (- 2)) 1) main_~i~0) (<= main_~j~0 .cse1) .cse0 .cse2))) [2020-07-20 17:54:20,125 INFO L268 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-07-20 17:54:20,125 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 21) no Hoare annotation was computed. [2020-07-20 17:54:20,125 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-07-20 17:54:20,125 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 17:54:20,125 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 17:54:20,126 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 17:54:20,126 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 17:54:20,126 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 17:54:20,126 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 17:54:20,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:54:20 BoogieIcfgContainer [2020-07-20 17:54:20,144 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:54:20,147 INFO L168 Benchmark]: Toolchain (without parser) took 10808.64 ms. Allocated memory was 138.9 MB in the beginning and 244.3 MB in the end (delta: 105.4 MB). Free memory was 103.6 MB in the beginning and 177.6 MB in the end (delta: -74.0 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:54:20,148 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 17:54:20,149 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.38 ms. Allocated memory is still 138.9 MB. Free memory was 103.4 MB in the beginning and 93.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:54:20,150 INFO L168 Benchmark]: Boogie Preprocessor took 117.14 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 93.7 MB in the beginning and 183.5 MB in the end (delta: -89.9 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:54:20,150 INFO L168 Benchmark]: RCFGBuilder took 279.28 ms. Allocated memory is still 203.4 MB. Free memory was 183.5 MB in the beginning and 167.6 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:54:20,151 INFO L168 Benchmark]: TraceAbstraction took 10185.85 ms. Allocated memory was 203.4 MB in the beginning and 244.3 MB in the end (delta: 40.9 MB). Free memory was 167.0 MB in the beginning and 177.6 MB in the end (delta: -10.6 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:54:20,156 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 220.38 ms. Allocated memory is still 138.9 MB. Free memory was 103.4 MB in the beginning and 93.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.14 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 93.7 MB in the beginning and 183.5 MB in the end (delta: -89.9 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 279.28 ms. Allocated memory is still 203.4 MB. Free memory was 183.5 MB in the beginning and 167.6 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10185.85 ms. Allocated memory was 203.4 MB in the beginning and 244.3 MB in the end (delta: 40.9 MB). Free memory was 167.0 MB in the beginning and 177.6 MB in the end (delta: -10.6 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 25]: Loop Invariant Derived loop invariant: ((j < n && 2 * i <= k) && k <= n) && 2 * i <= j - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((k <= n && n <= k) || ((k <= 2 * i && n <= k) && n <= j)) || ((((n * -1 + 1) / -2 + 1 <= i && j <= 2 * i) && n <= k) && n <= j) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((k <= n && n <= k) && 2 * i <= j) || (((k <= 2 * i + 1 && k <= j) && n <= k) && 2 * i <= j)) || ((((n * -1 + 1) / -2 + 1 <= j / 2 && j <= 2 * i) && n <= k) && 2 * i <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.6s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 186 SDtfs, 76 SDslu, 432 SDs, 0 SdLazy, 346 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 237 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 22 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 33 PreInvPairs, 62 NumberOfFragments, 174 HoareAnnotationTreeSize, 33 FomulaSimplifications, 937 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 106 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.6s InterpolantComputationTime, 178 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 201 ConstructedInterpolants, 0 QuantifiedInterpolants, 10385 SizeOfPredicates, 21 NumberOfNonLiveVariables, 352 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 61/67 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...