/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:56:03,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:56:03,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:56:03,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:56:03,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:56:03,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:56:03,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:56:03,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:56:03,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:56:03,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:56:03,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:56:03,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:56:03,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:56:03,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:56:03,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:56:03,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:56:03,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:56:03,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:56:03,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:56:03,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:56:03,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:56:03,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:56:03,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:56:03,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:56:03,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:56:03,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:56:03,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:56:03,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:56:03,583 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 12:56:03,598 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:56:03,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:56:03,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:56:03,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:56:03,599 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:56:03,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:56:03,600 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:56:03,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:56:03,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:56:03,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:56:03,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:56:03,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:56:03,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:56:03,601 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:56:03,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:56:03,602 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:56:03,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:56:03,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:56:03,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:56:03,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:56:03,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:56:03,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:56:03,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:56:03,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:56:03,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:56:03,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:56:03,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:03,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:56:03,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:56:03,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 12:56:03,928 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:56:03,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:56:03,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:56:03,950 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:56:03,950 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:56:03,951 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-21 12:56:04,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3eb61a8c/f227c7b366de4245b44c2c2b4c3d2ac3/FLAGcbaad7b8a [2020-07-21 12:56:04,485 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:56:04,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-21 12:56:04,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3eb61a8c/f227c7b366de4245b44c2c2b4c3d2ac3/FLAGcbaad7b8a [2020-07-21 12:56:04,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3eb61a8c/f227c7b366de4245b44c2c2b4c3d2ac3 [2020-07-21 12:56:04,907 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:56:04,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:56:04,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:04,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:56:04,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:56:04,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:04" (1/1) ... [2020-07-21 12:56:04,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5138ac0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:04, skipping insertion in model container [2020-07-21 12:56:04,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:04" (1/1) ... [2020-07-21 12:56:04,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:56:04,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:56:05,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:05,156 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:56:05,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:05,186 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:56:05,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:05 WrapperNode [2020-07-21 12:56:05,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:05,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:56:05,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:56:05,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:56:05,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:05" (1/1) ... [2020-07-21 12:56:05,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:05" (1/1) ... [2020-07-21 12:56:05,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:05" (1/1) ... [2020-07-21 12:56:05,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:05" (1/1) ... [2020-07-21 12:56:05,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:05" (1/1) ... [2020-07-21 12:56:05,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:05" (1/1) ... [2020-07-21 12:56:05,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:05" (1/1) ... [2020-07-21 12:56:05,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:56:05,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:56:05,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:56:05,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:56:05,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:56:05,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:56:05,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:56:05,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-21 12:56:05,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:56:05,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:56:05,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:56:05,368 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-21 12:56:05,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:56:05,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:56:05,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:56:05,573 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:56:05,573 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:56:05,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:05 BoogieIcfgContainer [2020-07-21 12:56:05,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:56:05,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:56:05,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:56:05,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:56:05,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:56:04" (1/3) ... [2020-07-21 12:56:05,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7862eb89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:56:05, skipping insertion in model container [2020-07-21 12:56:05,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:05" (2/3) ... [2020-07-21 12:56:05,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7862eb89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:56:05, skipping insertion in model container [2020-07-21 12:56:05,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:05" (3/3) ... [2020-07-21 12:56:05,586 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-07-21 12:56:05,597 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:56:05,605 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:56:05,620 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:56:05,646 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:56:05,646 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:56:05,646 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:56:05,647 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:56:05,647 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:56:05,647 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:56:05,647 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:56:05,647 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:56:05,672 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 12:56:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 12:56:05,682 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:05,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:05,684 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:05,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-21 12:56:05,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:05,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051085950] [2020-07-21 12:56:05,719 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 12:56:05,818 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:05,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:05,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:56:05,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:05,945 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 12:56:05,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:05,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051085950] [2020-07-21 12:56:05,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:05,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 12:56:05,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781433098] [2020-07-21 12:56:05,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 12:56:05,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:05,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 12:56:05,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:56:05,969 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-21 12:56:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:06,145 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-07-21 12:56:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:56:06,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 12:56:06,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:06,158 INFO L225 Difference]: With dead ends: 39 [2020-07-21 12:56:06,158 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 12:56:06,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:56:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 12:56:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 12:56:06,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 12:56:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-21 12:56:06,206 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2020-07-21 12:56:06,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:06,207 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-21 12:56:06,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 12:56:06,207 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-21 12:56:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 12:56:06,209 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:06,209 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] [2020-07-21 12:56:06,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:06,416 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:06,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:06,417 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-21 12:56:06,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:06,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300063070] [2020-07-21 12:56:06,419 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 12:56:06,456 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:06,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:06,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:56:06,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 12:56:06,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 12:56:06,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300063070] [2020-07-21 12:56:06,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 12:56:06,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2020-07-21 12:56:06,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493233662] [2020-07-21 12:56:06,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:56:06,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:06,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:56:06,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-21 12:56:06,783 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 8 states. [2020-07-21 12:56:06,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:06,970 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-07-21 12:56:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:56:06,971 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-21 12:56:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:06,973 INFO L225 Difference]: With dead ends: 32 [2020-07-21 12:56:06,973 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 12:56:06,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-07-21 12:56:06,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 12:56:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 12:56:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 12:56:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-07-21 12:56:06,984 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2020-07-21 12:56:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:06,984 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-07-21 12:56:06,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:56:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-07-21 12:56:06,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 12:56:06,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:06,987 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:07,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:07,204 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:07,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:07,205 INFO L82 PathProgramCache]: Analyzing trace with hash 408363011, now seen corresponding path program 1 times [2020-07-21 12:56:07,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:07,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700400703] [2020-07-21 12:56:07,206 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 12:56:07,246 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:07,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:07,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:56:07,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 12:56:07,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 12:56:07,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700400703] [2020-07-21 12:56:07,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:07,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 12:56:07,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354366540] [2020-07-21 12:56:07,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 12:56:07,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:07,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 12:56:07,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:56:07,474 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 9 states. [2020-07-21 12:56:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:07,639 INFO L93 Difference]: Finished difference Result 53 states and 81 transitions. [2020-07-21 12:56:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:56:07,640 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 12:56:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:07,642 INFO L225 Difference]: With dead ends: 53 [2020-07-21 12:56:07,642 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 12:56:07,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-21 12:56:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 12:56:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 12:56:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 12:56:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-21 12:56:07,652 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2020-07-21 12:56:07,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:07,653 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-21 12:56:07,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 12:56:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-21 12:56:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-21 12:56:07,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:07,655 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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 12:56:07,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:07,871 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:07,872 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-07-21 12:56:07,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:07,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917911248] [2020-07-21 12:56:07,873 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 12:56:07,924 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:07,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:07,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 12:56:07,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 12:56:08,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-21 12:56:08,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917911248] [2020-07-21 12:56:08,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:08,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2020-07-21 12:56:08,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848801560] [2020-07-21 12:56:08,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 12:56:08,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:08,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 12:56:08,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:56:08,626 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 22 states. [2020-07-21 12:56:09,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:09,308 INFO L93 Difference]: Finished difference Result 56 states and 88 transitions. [2020-07-21 12:56:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 12:56:09,309 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-07-21 12:56:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:09,315 INFO L225 Difference]: With dead ends: 56 [2020-07-21 12:56:09,315 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 12:56:09,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 12:56:09,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 12:56:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2020-07-21 12:56:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 12:56:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 67 transitions. [2020-07-21 12:56:09,342 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 67 transitions. Word has length 35 [2020-07-21 12:56:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:09,343 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 67 transitions. [2020-07-21 12:56:09,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 12:56:09,343 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 67 transitions. [2020-07-21 12:56:09,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-21 12:56:09,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:09,345 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:09,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:09,558 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:09,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:09,559 INFO L82 PathProgramCache]: Analyzing trace with hash -692340191, now seen corresponding path program 2 times [2020-07-21 12:56:09,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:09,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847369283] [2020-07-21 12:56:09,560 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 12:56:09,603 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:56:09,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:09,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 12:56:09,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 12:56:09,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:10,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:10,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-21 12:56:10,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847369283] [2020-07-21 12:56:10,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:10,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 12:56:10,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424623216] [2020-07-21 12:56:10,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 12:56:10,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:10,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 12:56:10,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 12:56:10,191 INFO L87 Difference]: Start difference. First operand 41 states and 67 transitions. Second operand 13 states. [2020-07-21 12:56:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:10,444 INFO L93 Difference]: Finished difference Result 101 states and 246 transitions. [2020-07-21 12:56:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 12:56:10,446 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-21 12:56:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:10,451 INFO L225 Difference]: With dead ends: 101 [2020-07-21 12:56:10,451 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 12:56:10,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-07-21 12:56:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 12:56:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-07-21 12:56:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-21 12:56:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 135 transitions. [2020-07-21 12:56:10,474 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 135 transitions. Word has length 49 [2020-07-21 12:56:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:10,474 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 135 transitions. [2020-07-21 12:56:10,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 12:56:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 135 transitions. [2020-07-21 12:56:10,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 12:56:10,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:10,478 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:10,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:10,694 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:10,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2059848011, now seen corresponding path program 3 times [2020-07-21 12:56:10,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:10,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338917034] [2020-07-21 12:56:10,695 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 12:56:10,742 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:10,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:10,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:56:10,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-21 12:56:10,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-07-21 12:56:10,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338917034] [2020-07-21 12:56:10,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:10,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-07-21 12:56:10,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266308856] [2020-07-21 12:56:10,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:56:10,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:10,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:56:10,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:56:10,914 INFO L87 Difference]: Start difference. First operand 68 states and 135 transitions. Second operand 5 states. [2020-07-21 12:56:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:10,977 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-07-21 12:56:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:56:10,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-07-21 12:56:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:10,981 INFO L225 Difference]: With dead ends: 125 [2020-07-21 12:56:10,982 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 12:56:10,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:56:10,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 12:56:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-21 12:56:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 12:56:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-07-21 12:56:11,007 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 56 [2020-07-21 12:56:11,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:11,008 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-07-21 12:56:11,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:56:11,008 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-07-21 12:56:11,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 12:56:11,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:11,011 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:11,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:11,225 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:11,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:11,226 INFO L82 PathProgramCache]: Analyzing trace with hash -615976298, now seen corresponding path program 4 times [2020-07-21 12:56:11,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:11,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33379293] [2020-07-21 12:56:11,228 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 12:56:11,282 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:11,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:11,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 12:56:11,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 64 proven. 37 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-21 12:56:11,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 80 proven. 26 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-07-21 12:56:13,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33379293] [2020-07-21 12:56:13,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:13,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-21 12:56:13,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426412472] [2020-07-21 12:56:13,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 12:56:13,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:13,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 12:56:13,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-21 12:56:13,055 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 24 states. [2020-07-21 12:56:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:13,377 INFO L93 Difference]: Finished difference Result 100 states and 206 transitions. [2020-07-21 12:56:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 12:56:13,380 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-07-21 12:56:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:13,381 INFO L225 Difference]: With dead ends: 100 [2020-07-21 12:56:13,381 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 12:56:13,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 12:56:13,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 12:56:13,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 12:56:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 12:56:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 12:56:13,385 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2020-07-21 12:56:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:13,385 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 12:56:13,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 12:56:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 12:56:13,385 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 12:56:13,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:13,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 12:56:14,096 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2020-07-21 12:56:14,185 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 12:56:14,185 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:56:14,185 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:56:14,185 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 12:56:14,185 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 12:56:14,186 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 12:56:14,186 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2020-07-21 12:56:14,186 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= |ackermann_#in~n| ackermann_~n) (or (not (<= 0 |ackermann_#in~m|)) (<= 1 |ackermann_#in~m|)) (<= ackermann_~m |ackermann_#in~m|)) [2020-07-21 12:56:14,186 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2020-07-21 12:56:14,186 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-21 12:56:14,186 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (or (not (<= 0 |ackermann_#in~m|)) (<= 1 |ackermann_#in~m|)) (<= |ackermann_#in~n| ackermann_~n) (<= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| 0)) [2020-07-21 12:56:14,186 INFO L264 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (<= |ackermann_#in~m| ackermann_~m)) (.cse1 (<= |ackermann_#in~n| ackermann_~n)) (.cse2 (<= 1 |ackermann_#in~m|))) (or (and .cse0 .cse1 (<= 2 |ackermann_#t~ret1|) (<= ackermann_~m 1) .cse2) (and .cse0 (<= ackermann_~m 0) .cse1 (<= 0 |ackermann_#in~m|)) (and .cse0 (<= 3 |ackermann_#t~ret1|) .cse1 (<= ackermann_~m |ackermann_#in~m|) .cse2))) [2020-07-21 12:56:14,187 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-21 12:56:14,187 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-21 12:56:14,187 INFO L268 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-07-21 12:56:14,187 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-21 12:56:14,187 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2020-07-21 12:56:14,188 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2020-07-21 12:56:14,188 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2020-07-21 12:56:14,188 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-21 12:56:14,188 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2020-07-21 12:56:14,188 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2020-07-21 12:56:14,188 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-07-21 12:56:14,189 INFO L268 CegarLoopResult]: For program point L41(lines 41 45) no Hoare annotation was computed. [2020-07-21 12:56:14,189 INFO L271 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: true [2020-07-21 12:56:14,189 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-07-21 12:56:14,189 INFO L268 CegarLoopResult]: For program point L34(lines 34 39) no Hoare annotation was computed. [2020-07-21 12:56:14,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:56:14 BoogieIcfgContainer [2020-07-21 12:56:14,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 12:56:14,200 INFO L168 Benchmark]: Toolchain (without parser) took 9289.85 ms. Allocated memory was 143.7 MB in the beginning and 310.4 MB in the end (delta: 166.7 MB). Free memory was 101.2 MB in the beginning and 132.2 MB in the end (delta: -31.0 MB). Peak memory consumption was 135.7 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:14,202 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 12:56:14,204 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.37 ms. Allocated memory is still 143.7 MB. Free memory was 100.8 MB in the beginning and 91.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:14,210 INFO L168 Benchmark]: Boogie Preprocessor took 27.44 ms. Allocated memory is still 143.7 MB. Free memory was 91.3 MB in the beginning and 89.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:14,211 INFO L168 Benchmark]: RCFGBuilder took 362.78 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 89.8 MB in the beginning and 166.5 MB in the end (delta: -76.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:14,212 INFO L168 Benchmark]: TraceAbstraction took 8617.90 ms. Allocated memory was 200.3 MB in the beginning and 310.4 MB in the end (delta: 110.1 MB). Free memory was 165.9 MB in the beginning and 132.2 MB in the end (delta: 33.6 MB). Peak memory consumption was 143.7 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:14,226 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.37 ms. Allocated memory is still 143.7 MB. Free memory was 100.8 MB in the beginning and 91.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.44 ms. Allocated memory is still 143.7 MB. Free memory was 91.3 MB in the beginning and 89.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 362.78 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 89.8 MB in the beginning and 166.5 MB in the end (delta: -76.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8617.90 ms. Allocated memory was 200.3 MB in the beginning and 310.4 MB in the end (delta: 110.1 MB). Free memory was 165.9 MB in the beginning and 132.2 MB in the end (delta: 33.6 MB). Peak memory consumption was 143.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.9s, OverallIterations: 7, TraceHistogramMax: 9, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 153 SDtfs, 178 SDslu, 698 SDs, 0 SdLazy, 936 SolverSat, 229 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 576 GetRequests, 432 SyntacticMatches, 23 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred 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, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 145 PreInvPairs, 197 NumberOfFragments, 91 HoareAnnotationTreeSize, 145 FomulaSimplifications, 204 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 9 FomulaSimplificationsInter, 609 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 274 NumberOfCodeBlocks, 250 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 520 ConstructedInterpolants, 0 QuantifiedInterpolants, 49756 SizeOfPredicates, 25 NumberOfNonLiveVariables, 780 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 655/788 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...