/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 2 -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 [2020-07-21 16:56:32,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:56:32,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:56:32,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:56:32,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:56:32,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:56:32,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:56:32,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:56:32,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:56:32,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:56:32,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:56:32,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:56:32,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:56:32,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:56:32,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:56:32,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:56:32,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:56:32,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:56:32,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:56:32,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:56:32,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:56:32,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:56:32,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:56:32,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:56:32,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:56:32,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:56:32,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:56:32,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:56:32,369 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 16:56:32,383 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:56:32,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:56:32,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:56:32,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:56:32,385 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:56:32,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:56:32,386 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:56:32,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:56:32,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:56:32,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:56:32,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:56:32,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:56:32,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:56:32,387 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:56:32,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:56:32,387 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:56:32,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:56:32,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:56:32,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:56:32,388 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:56:32,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:56:32,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:56:32,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:56:32,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:56:32,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:56:32,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:56:32,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:32,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:56:32,390 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:56:32,390 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 -> 2 [2020-07-21 16:56:32,686 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:56:32,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:56:32,703 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:56:32,704 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:56:32,705 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:56:32,706 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-21 16:56:32,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78bd2c99d/b266d6093441415b97191ca66312b71f/FLAG025d43c61 [2020-07-21 16:56:33,265 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:56:33,266 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-21 16:56:33,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78bd2c99d/b266d6093441415b97191ca66312b71f/FLAG025d43c61 [2020-07-21 16:56:33,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78bd2c99d/b266d6093441415b97191ca66312b71f [2020-07-21 16:56:33,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:56:33,647 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:56:33,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:56:33,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:56:33,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:56:33,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:56:33" (1/1) ... [2020-07-21 16:56:33,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18f0dfff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:33, skipping insertion in model container [2020-07-21 16:56:33,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:56:33" (1/1) ... [2020-07-21 16:56:33,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:56:33,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:56:33,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:56:33,859 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:56:33,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:56:33,891 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:56:33,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:33 WrapperNode [2020-07-21 16:56:33,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:56:33,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:56:33,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:56:33,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:56:33,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:33" (1/1) ... [2020-07-21 16:56:33,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:33" (1/1) ... [2020-07-21 16:56:33,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:33" (1/1) ... [2020-07-21 16:56:33,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:33" (1/1) ... [2020-07-21 16:56:34,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:33" (1/1) ... [2020-07-21 16:56:34,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:33" (1/1) ... [2020-07-21 16:56:34,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:33" (1/1) ... [2020-07-21 16:56:34,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:56:34,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:56:34,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:56:34,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:56:34,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:33" (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 16:56:34,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:56:34,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:56:34,085 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:56:34,085 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:56:34,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:56:34,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:56:34,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:56:34,086 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:56:34,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:56:34,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:56:34,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:56:34,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:56:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:56:34,359 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:56:34,360 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 16:56:34,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:56:34 BoogieIcfgContainer [2020-07-21 16:56:34,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:56:34,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:56:34,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:56:34,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:56:34,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:56:33" (1/3) ... [2020-07-21 16:56:34,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac0eff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:56:34, skipping insertion in model container [2020-07-21 16:56:34,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:33" (2/3) ... [2020-07-21 16:56:34,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac0eff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:56:34, skipping insertion in model container [2020-07-21 16:56:34,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:56:34" (3/3) ... [2020-07-21 16:56:34,389 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-07-21 16:56:34,399 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:56:34,409 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:56:34,420 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:56:34,444 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:56:34,444 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:56:34,444 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:56:34,444 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:56:34,444 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:56:34,444 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:56:34,445 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:56:34,445 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:56:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 16:56:34,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 16:56:34,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:34,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:34,472 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:34,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:34,478 INFO L82 PathProgramCache]: Analyzing trace with hash 404168940, now seen corresponding path program 1 times [2020-07-21 16:56:34,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:34,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785507436] [2020-07-21 16:56:34,487 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 16:56:34,560 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:34,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:34,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:56:34,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:34,620 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:34,653 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 16:56:34,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:56:34,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785507436] [2020-07-21 16:56:34,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:56:34,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:56:34,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193563410] [2020-07-21 16:56:34,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:56:34,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:34,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:56:34,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:56:34,679 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-21 16:56:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:34,801 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2020-07-21 16:56:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:56:34,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 16:56:34,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:34,814 INFO L225 Difference]: With dead ends: 57 [2020-07-21 16:56:34,814 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 16:56:34,818 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 [2020-07-21 16:56:34,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 16:56:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 16:56:34,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 16:56:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-21 16:56:34,866 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-07-21 16:56:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:34,866 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-21 16:56:34,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:56:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-21 16:56:34,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 16:56:34,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:34,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:35,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:35,070 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:35,071 INFO L82 PathProgramCache]: Analyzing trace with hash -849304486, now seen corresponding path program 1 times [2020-07-21 16:56:35,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:35,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028837948] [2020-07-21 16:56:35,073 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 16:56:35,103 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:35,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:35,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:56:35,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:35,136 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:35,159 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 16:56:35,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:56:35,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028837948] [2020-07-21 16:56:35,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:56:35,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:56:35,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286983726] [2020-07-21 16:56:35,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:56:35,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:35,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:56:35,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:56:35,166 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-07-21 16:56:35,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:35,376 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-21 16:56:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:56:35,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-21 16:56:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:35,378 INFO L225 Difference]: With dead ends: 40 [2020-07-21 16:56:35,379 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 16:56:35,381 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 [2020-07-21 16:56:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 16:56:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-07-21 16:56:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 16:56:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 16:56:35,398 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2020-07-21 16:56:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:35,401 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 16:56:35,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:56:35,401 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 16:56:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 16:56:35,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:35,405 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:35,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:35,623 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:35,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1573212483, now seen corresponding path program 1 times [2020-07-21 16:56:35,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:35,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175845545] [2020-07-21 16:56:35,625 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 16:56:35,667 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:35,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:56:35,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:35,685 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:56:35,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:56:35,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175845545] [2020-07-21 16:56:35,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:56:35,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:56:35,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992201487] [2020-07-21 16:56:35,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:56:35,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:35,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:56:35,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:56:35,715 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2020-07-21 16:56:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:35,794 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-07-21 16:56:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:56:35,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 16:56:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:35,795 INFO L225 Difference]: With dead ends: 45 [2020-07-21 16:56:35,796 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 16:56:35,796 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 [2020-07-21 16:56:35,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 16:56:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-21 16:56:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 16:56:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-21 16:56:35,807 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2020-07-21 16:56:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:35,808 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-21 16:56:35,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:56:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-21 16:56:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 16:56:35,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:35,809 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] [2020-07-21 16:56:36,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:36,021 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:36,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1604756500, now seen corresponding path program 1 times [2020-07-21 16:56:36,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:36,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83243224] [2020-07-21 16:56:36,023 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 16:56:36,063 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:56:36,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:36,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:56:36,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:56:36,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:56:36,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83243224] [2020-07-21 16:56:36,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:56:36,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:56:36,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358247591] [2020-07-21 16:56:36,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:56:36,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:36,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:56:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:56:36,088 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 4 states. [2020-07-21 16:56:36,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:36,160 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-07-21 16:56:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:56:36,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-21 16:56:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:36,167 INFO L225 Difference]: With dead ends: 68 [2020-07-21 16:56:36,167 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 16:56:36,168 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 [2020-07-21 16:56:36,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 16:56:36,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 16:56:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 16:56:36,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-21 16:56:36,188 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 24 [2020-07-21 16:56:36,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:36,189 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-21 16:56:36,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:56:36,189 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-21 16:56:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 16:56:36,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:36,192 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] [2020-07-21 16:56:36,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:36,394 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:36,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:36,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1598241856, now seen corresponding path program 1 times [2020-07-21 16:56:36,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:36,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25707664] [2020-07-21 16:56:36,396 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 16:56:36,420 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:56:36,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:36,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:56:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:56:36,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:56:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 16:56:36,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25707664] [2020-07-21 16:56:36,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:56:36,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-21 16:56:36,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899996674] [2020-07-21 16:56:36,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:56:36,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:36,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:56:36,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:56:36,512 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 6 states. [2020-07-21 16:56:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:36,590 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-07-21 16:56:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:56:36,590 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-07-21 16:56:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:36,591 INFO L225 Difference]: With dead ends: 79 [2020-07-21 16:56:36,592 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 16:56:36,592 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 [2020-07-21 16:56:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 16:56:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-07-21 16:56:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 16:56:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-07-21 16:56:36,603 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 31 [2020-07-21 16:56:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:36,603 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-07-21 16:56:36,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:56:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-07-21 16:56:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 16:56:36,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:36,605 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] [2020-07-21 16:56:36,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:36,818 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:36,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:36,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2099424040, now seen corresponding path program 1 times [2020-07-21 16:56:36,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:36,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465771759] [2020-07-21 16:56:36,819 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 16:56:36,845 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:56:36,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:36,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:56:36,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:56:36,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:56:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 16:56:40,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465771759] [2020-07-21 16:56:40,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:56:40,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-21 16:56:40,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788474394] [2020-07-21 16:56:40,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 16:56:40,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:40,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 16:56:40,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-07-21 16:56:40,261 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 13 states. [2020-07-21 16:57:05,971 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-21 16:57:19,894 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-21 16:57:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:57:34,262 INFO L93 Difference]: Finished difference Result 172 states and 229 transitions. [2020-07-21 16:57:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 16:57:34,269 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-07-21 16:57:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:57:34,272 INFO L225 Difference]: With dead ends: 172 [2020-07-21 16:57:34,272 INFO L226 Difference]: Without dead ends: 105 [2020-07-21 16:57:34,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=297, Invalid=888, Unknown=5, NotChecked=0, Total=1190 [2020-07-21 16:57:34,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-21 16:57:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2020-07-21 16:57:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-21 16:57:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2020-07-21 16:57:34,295 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 34 [2020-07-21 16:57:34,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:57:34,295 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2020-07-21 16:57:34,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 16:57:34,296 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2020-07-21 16:57:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 16:57:34,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:57:34,298 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] [2020-07-21 16:57:34,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:57:34,512 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:57:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:57:34,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1702845076, now seen corresponding path program 2 times [2020-07-21 16:57:34,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:57:34,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537043800] [2020-07-21 16:57:34,514 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 16:57:34,542 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:57:34,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:57:34,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:57:34,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:57:34,601 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:57:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 16:57:34,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:57:34,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537043800] [2020-07-21 16:57:34,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:57:34,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:57:34,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193687505] [2020-07-21 16:57:34,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:57:34,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:57:34,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:57:34,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:57:34,645 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 6 states. [2020-07-21 16:57:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:57:34,856 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2020-07-21 16:57:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:57:34,864 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-21 16:57:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:57:34,865 INFO L225 Difference]: With dead ends: 89 [2020-07-21 16:57:34,865 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 16:57:34,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:57:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 16:57:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 16:57:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 16:57:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 16:57:34,868 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2020-07-21 16:57:34,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:57:34,868 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 16:57:34,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:57:34,868 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 16:57:34,869 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 16:57:35,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:57:35,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 16:57:35,499 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2020-07-21 16:57:44,267 WARN L193 SmtUtils]: Spent 8.72 s on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-07-21 16:57:44,457 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 13 [2020-07-21 16:58:00,239 WARN L193 SmtUtils]: Spent 15.78 s on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-07-21 16:58:00,246 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 16:58:00,247 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:58:00,247 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:58:00,247 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 16:58:00,247 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:58:00,247 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:58:00,247 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 16:58:00,248 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 16:58:00,248 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 16:58:00,248 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 16:58:00,248 INFO L268 CegarLoopResult]: For program point L31(lines 23 33) no Hoare annotation was computed. [2020-07-21 16:58:00,248 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 37) no Hoare annotation was computed. [2020-07-21 16:58:00,248 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 33) the Hoare annotation is: (let ((.cse4 (* 2 main_~i~0))) (let ((.cse2 (forall ((main_~n~0 Int)) (or (< main_~k~0 main_~n~0) (< (div (* main_~n~0 (- 1)) (- 2)) (+ main_~i~0 2))))) (.cse3 (<= main_~j~0 .cse4)) (.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= .cse4 main_~j~0))) (or (and (<= main_~k~0 main_~n~0) .cse0 .cse1) (and .cse2 (<= main_~k~0 main_~j~0) .cse0 .cse1) (and (<= (+ (div (+ (* main_~n~0 (- 1)) 1) (- 2)) 1) (div main_~j~0 2)) .cse3 .cse0 .cse1) (and .cse2 .cse3 .cse0 .cse1 (<= main_~n~0 main_~j~0))))) [2020-07-21 16:58:00,248 INFO L268 CegarLoopResult]: For program point L24(lines 24 32) no Hoare annotation was computed. [2020-07-21 16:58:00,248 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))) [2020-07-21 16:58:00,248 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-21 16:58:00,248 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 37) no Hoare annotation was computed. [2020-07-21 16:58:00,249 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)) [2020-07-21 16:58:00,249 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-07-21 16:58:00,249 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)) [2020-07-21 16:58:00,249 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))) [2020-07-21 16:58:00,249 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 27) no Hoare annotation was computed. [2020-07-21 16:58:00,249 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 34) no Hoare annotation was computed. [2020-07-21 16:58:00,250 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_~n~0 (+ .cse1 1)) (forall ((main_~n~0 Int)) (or (< main_~k~0 main_~n~0) (< (div (* main_~n~0 (- 1)) (- 2)) (+ main_~i~0 2)))) .cse0 .cse2) (and (<= (+ (div (+ (* main_~n~0 (- 1)) 1) (- 2)) 1) main_~i~0) (<= main_~j~0 .cse1) .cse0 .cse2))) [2020-07-21 16:58:00,250 INFO L268 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-07-21 16:58:00,250 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 21) no Hoare annotation was computed. [2020-07-21 16:58:00,252 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-07-21 16:58:00,254 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 16:58:00,254 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 16:58:00,255 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 16:58:00,255 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 16:58:00,255 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 16:58:00,255 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 16:58:00,275 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,276 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,277 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,277 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,278 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,279 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,279 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,279 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,280 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,280 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,280 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,281 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:58:00 BoogieIcfgContainer [2020-07-21 16:58:00,283 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:58:00,285 INFO L168 Benchmark]: Toolchain (without parser) took 86639.53 ms. Allocated memory was 141.6 MB in the beginning and 244.3 MB in the end (delta: 102.8 MB). Free memory was 101.8 MB in the beginning and 103.2 MB in the end (delta: -1.4 MB). Peak memory consumption was 101.4 MB. Max. memory is 7.1 GB. [2020-07-21 16:58:00,286 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 141.6 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 16:58:00,287 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.15 ms. Allocated memory is still 141.6 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:58:00,288 INFO L168 Benchmark]: Boogie Preprocessor took 119.59 ms. Allocated memory was 141.6 MB in the beginning and 202.4 MB in the end (delta: 60.8 MB). Free memory was 91.8 MB in the beginning and 180.6 MB in the end (delta: -88.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:58:00,289 INFO L168 Benchmark]: RCFGBuilder took 351.87 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 166.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:58:00,289 INFO L168 Benchmark]: TraceAbstraction took 85917.72 ms. Allocated memory was 202.4 MB in the beginning and 244.3 MB in the end (delta: 41.9 MB). Free memory was 166.0 MB in the beginning and 103.2 MB in the end (delta: 62.8 MB). Peak memory consumption was 104.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:58:00,293 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 141.6 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.15 ms. Allocated memory is still 141.6 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.59 ms. Allocated memory was 141.6 MB in the beginning and 202.4 MB in the end (delta: 60.8 MB). Free memory was 91.8 MB in the beginning and 180.6 MB in the end (delta: -88.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 351.87 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 166.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 85917.72 ms. Allocated memory was 202.4 MB in the beginning and 244.3 MB in the end (delta: 41.9 MB). Free memory was 166.0 MB in the beginning and 103.2 MB in the end (delta: 62.8 MB). Peak memory consumption was 104.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] * 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 [2020-07-21 16:58:00,304 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,304 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,305 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,305 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] Derived loop invariant: ((k <= n && n <= k) || (((n < 2 * i + 1 && (forall main_~n~0 : int :: k < main_~n~0 || main_~n~0 * -1 / -2 < i + 2)) && n <= k) && n <= j)) || ((((n * -1 + 1) / -2 + 1 <= i && j <= 2 * i) && n <= k) && n <= j) - InvariantResult [Line: 23]: Loop Invariant [2020-07-21 16:58:00,306 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,306 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,307 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,307 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,307 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,308 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,308 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 16:58:00,308 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] Derived loop invariant: ((((k <= n && n <= k) && 2 * i <= j) || ((((forall main_~n~0 : int :: k < main_~n~0 || main_~n~0 * -1 / -2 < i + 2) && k <= j) && n <= k) && 2 * i <= j)) || ((((n * -1 + 1) / -2 + 1 <= j / 2 && j <= 2 * i) && n <= k) && 2 * i <= j)) || (((((forall main_~n~0 : int :: k < main_~n~0 || main_~n~0 * -1 / -2 < i + 2) && j <= 2 * i) && n <= k) && 2 * i <= j) && n <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 60.6s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 54.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 25.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 199 SDtfs, 100 SDslu, 482 SDs, 0 SdLazy, 469 SolverSat, 94 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 33.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 266 GetRequests, 201 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 23.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred 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: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 27 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 44 PreInvPairs, 94 NumberOfFragments, 228 HoareAnnotationTreeSize, 44 FomulaSimplifications, 2045 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 12 FomulaSimplificationsInter, 140 FormulaSimplificationTreeSizeReductionInter, 24.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 178 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 234 ConstructedInterpolants, 1 QuantifiedInterpolants, 13949 SizeOfPredicates, 23 NumberOfNonLiveVariables, 350 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 71/81 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...