/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/Ackermann03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:56:04,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:56:04,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:56:04,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:56:04,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:56:04,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:56:04,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:56:04,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:56:04,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:56:04,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:56:04,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:56:04,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:56:04,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:56:04,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:56:04,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:56:04,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:56:04,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:56:04,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:56:04,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:56:04,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:56:04,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:56:04,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:56:04,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:56:04,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:56:04,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:56:04,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:56:04,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:56:04,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:56:04,355 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 12:56:04,385 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:56:04,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:56:04,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:56:04,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:56:04,388 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:56:04,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:56:04,388 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:56:04,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:56:04,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:56:04,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:56:04,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:56:04,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:56:04,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:56:04,391 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:56:04,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:56:04,392 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:56:04,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:56:04,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:56:04,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:56:04,393 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:56:04,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:56:04,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:56:04,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:56:04,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:56:04,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:56:04,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:56:04,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:04,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:56:04,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:56:04,395 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 12:56:04,673 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:56:04,686 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:56:04,689 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:56:04,691 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:56:04,691 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:56:04,692 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-21 12:56:04,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bf9fd228/03175bca5f514d5fabb8171bca923614/FLAGcde6c6737 [2020-07-21 12:56:05,159 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:56:05,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-21 12:56:05,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bf9fd228/03175bca5f514d5fabb8171bca923614/FLAGcde6c6737 [2020-07-21 12:56:05,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bf9fd228/03175bca5f514d5fabb8171bca923614 [2020-07-21 12:56:05,626 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:56:05,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:56:05,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:05,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:56:05,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:56:05,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:05" (1/1) ... [2020-07-21 12:56:05,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7272f00e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:05, skipping insertion in model container [2020-07-21 12:56:05,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:05" (1/1) ... [2020-07-21 12:56:05,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:56:05,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:56:05,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:05,834 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:56:05,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:05,869 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:56:05,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:05 WrapperNode [2020-07-21 12:56:05,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:05,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:56:05,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:56:05,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:56:05,885 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 12:56:05,886 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 12:56:05,892 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 12:56:05,892 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 12:56:05,896 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 12:56:05,899 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 12:56:05,900 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 12:56:05,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:56:05,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:56:05,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:56:05,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:56:05,903 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 12:56:06,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:56:06,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:56:06,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-21 12:56:06,112 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:56:06,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:56:06,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:56:06,113 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-21 12:56:06,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:56:06,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:56:06,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:56:06,309 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:56:06,310 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:56:06,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:06 BoogieIcfgContainer [2020-07-21 12:56:06,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:56:06,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:56:06,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:56:06,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:56:06,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:56:05" (1/3) ... [2020-07-21 12:56:06,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505c55e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:56:06, skipping insertion in model container [2020-07-21 12:56:06,320 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 12:56:06,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505c55e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:56:06, skipping insertion in model container [2020-07-21 12:56:06,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:06" (3/3) ... [2020-07-21 12:56:06,322 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2020-07-21 12:56:06,334 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:56:06,342 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:56:06,357 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:56:06,410 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:56:06,411 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:56:06,411 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:56:06,411 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:56:06,411 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:56:06,411 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:56:06,412 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:56:06,412 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:56:06,455 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 12:56:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 12:56:06,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:06,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:06,475 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:06,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:06,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-21 12:56:06,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:06,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520272160] [2020-07-21 12:56:06,517 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 12:56:06,637 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:56:06,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:06,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:56:06,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:06,735 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 12:56:06,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:06,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520272160] [2020-07-21 12:56:06,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:06,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:56:06,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929261561] [2020-07-21 12:56:06,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:56:06,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:06,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:56:06,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:56:06,759 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-21 12:56:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:06,891 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-07-21 12:56:06,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:56:06,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 12:56:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:06,905 INFO L225 Difference]: With dead ends: 42 [2020-07-21 12:56:06,906 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 12:56:06,910 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 12:56:06,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 12:56:06,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 12:56:06,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 12:56:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-07-21 12:56:06,959 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-07-21 12:56:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:06,960 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-07-21 12:56:06,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:56:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-07-21 12:56:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 12:56:06,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:06,964 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 12:56:07,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:07,172 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:07,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:07,173 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-21 12:56:07,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:07,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109106768] [2020-07-21 12:56:07,174 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 12:56:07,219 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:56:07,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:07,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:56:07,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 12:56:07,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:07,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:07,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 12:56:07,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109106768] [2020-07-21 12:56:07,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:07,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-21 12:56:07,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194294619] [2020-07-21 12:56:07,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:56:07,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:07,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:56:07,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:56:07,473 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-07-21 12:56:07,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:07,589 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-07-21 12:56:07,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:56:07,590 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-21 12:56:07,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:07,593 INFO L225 Difference]: With dead ends: 38 [2020-07-21 12:56:07,593 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 12:56:07,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 12:56:07,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 12:56:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-21 12:56:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 12:56:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2020-07-21 12:56:07,619 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 22 [2020-07-21 12:56:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:07,619 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2020-07-21 12:56:07,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:56:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2020-07-21 12:56:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 12:56:07,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:07,622 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:07,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:07,836 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:07,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:07,836 INFO L82 PathProgramCache]: Analyzing trace with hash 687949058, now seen corresponding path program 2 times [2020-07-21 12:56:07,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:07,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83725629] [2020-07-21 12:56:07,837 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 12:56:07,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:07,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:07,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:56:07,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 12:56:07,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 12:56:08,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83725629] [2020-07-21 12:56:08,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:08,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 12:56:08,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269374755] [2020-07-21 12:56:08,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:56:08,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:08,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:56:08,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:56:08,011 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 8 states. [2020-07-21 12:56:08,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:08,129 INFO L93 Difference]: Finished difference Result 87 states and 187 transitions. [2020-07-21 12:56:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:56:08,130 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-21 12:56:08,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:08,134 INFO L225 Difference]: With dead ends: 87 [2020-07-21 12:56:08,134 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 12:56:08,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-21 12:56:08,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 12:56:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-21 12:56:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 12:56:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2020-07-21 12:56:08,162 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 29 [2020-07-21 12:56:08,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:08,166 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2020-07-21 12:56:08,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:56:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2020-07-21 12:56:08,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 12:56:08,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:08,181 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:08,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:08,395 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:08,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:08,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2091057537, now seen corresponding path program 1 times [2020-07-21 12:56:08,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:08,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219063118] [2020-07-21 12:56:08,398 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 12:56:08,488 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:56:08,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:08,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 12:56:08,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 157 proven. 146 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2020-07-21 12:56:08,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:09,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:09,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:09,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:10,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:10,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:10,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 159 proven. 168 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-07-21 12:56:10,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219063118] [2020-07-21 12:56:10,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:10,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-21 12:56:10,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582259738] [2020-07-21 12:56:10,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 12:56:10,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:10,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 12:56:10,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-21 12:56:10,202 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand 12 states. [2020-07-21 12:56:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:10,453 INFO L93 Difference]: Finished difference Result 128 states and 498 transitions. [2020-07-21 12:56:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:56:10,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 122 [2020-07-21 12:56:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:10,459 INFO L225 Difference]: With dead ends: 128 [2020-07-21 12:56:10,459 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 12:56:10,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 220 SyntacticMatches, 13 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:56:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 12:56:10,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-21 12:56:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 12:56:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2020-07-21 12:56:10,488 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 122 [2020-07-21 12:56:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:10,489 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2020-07-21 12:56:10,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 12:56:10,490 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2020-07-21 12:56:10,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 12:56:10,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:10,498 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:10,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:10,700 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:10,700 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 2 times [2020-07-21 12:56:10,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:10,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794428967] [2020-07-21 12:56:10,702 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 12:56:10,762 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:10,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:10,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 12:56:10,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-07-21 12:56:10,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-21 12:56:12,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794428967] [2020-07-21 12:56:12,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:12,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-21 12:56:12,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796179454] [2020-07-21 12:56:12,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 12:56:12,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:12,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 12:56:12,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-21 12:56:12,557 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 24 states. [2020-07-21 12:56:12,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:12,923 INFO L93 Difference]: Finished difference Result 97 states and 130 transitions. [2020-07-21 12:56:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 12:56:12,926 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-07-21 12:56:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:12,928 INFO L225 Difference]: With dead ends: 97 [2020-07-21 12:56:12,928 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 12:56:12,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 138 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 12:56:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 12:56:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-07-21 12:56:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 12:56:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-07-21 12:56:12,938 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 82 [2020-07-21 12:56:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:12,939 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-07-21 12:56:12,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 12:56:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-07-21 12:56:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-21 12:56:12,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:12,942 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:13,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:13,145 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1706548602, now seen corresponding path program 3 times [2020-07-21 12:56:13,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:13,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010116065] [2020-07-21 12:56:13,147 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 12:56:13,270 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:13,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:13,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 12:56:13,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 367 proven. 209 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2020-07-21 12:56:13,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:14,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:14,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:14,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 410 proven. 201 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2020-07-21 12:56:17,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010116065] [2020-07-21 12:56:17,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:17,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 35 [2020-07-21 12:56:17,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807233320] [2020-07-21 12:56:17,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 12:56:17,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:17,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 12:56:17,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 12:56:17,935 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 35 states. [2020-07-21 12:56:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:19,170 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2020-07-21 12:56:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 12:56:19,171 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 147 [2020-07-21 12:56:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:19,176 INFO L225 Difference]: With dead ends: 126 [2020-07-21 12:56:19,176 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 12:56:19,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 241 SyntacticMatches, 19 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=3600, Unknown=0, NotChecked=0, Total=4422 [2020-07-21 12:56:19,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 12:56:19,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2020-07-21 12:56:19,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 12:56:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-21 12:56:19,207 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 147 [2020-07-21 12:56:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:19,208 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-21 12:56:19,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 12:56:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-21 12:56:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-21 12:56:19,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:19,216 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:19,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:19,430 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:19,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:19,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1628439286, now seen corresponding path program 4 times [2020-07-21 12:56:19,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:19,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238711018] [2020-07-21 12:56:19,431 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 12:56:19,570 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:19,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:19,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 12:56:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 595 proven. 114 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2020-07-21 12:56:19,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:20,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:20,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:21,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:21,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 160 proven. 360 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2020-07-21 12:56:21,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238711018] [2020-07-21 12:56:21,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:21,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2020-07-21 12:56:21,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045617574] [2020-07-21 12:56:21,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 12:56:21,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:21,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 12:56:21,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-07-21 12:56:21,878 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 19 states. [2020-07-21 12:56:22,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:22,393 INFO L93 Difference]: Finished difference Result 119 states and 153 transitions. [2020-07-21 12:56:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 12:56:22,394 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 147 [2020-07-21 12:56:22,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:22,396 INFO L225 Difference]: With dead ends: 119 [2020-07-21 12:56:22,396 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 12:56:22,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 258 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 12:56:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 12:56:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-07-21 12:56:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 12:56:22,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-07-21 12:56:22,407 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 147 [2020-07-21 12:56:22,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:22,408 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-07-21 12:56:22,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 12:56:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-07-21 12:56:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-21 12:56:22,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:22,411 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:22,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:22,622 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:22,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:22,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 5 times [2020-07-21 12:56:22,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:22,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124968924] [2020-07-21 12:56:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:22,792 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:22,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:22,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 12:56:22,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-07-21 12:56:23,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:24,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:24,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:24,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:24,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-07-21 12:56:27,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124968924] [2020-07-21 12:56:27,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:27,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 33 [2020-07-21 12:56:27,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906904142] [2020-07-21 12:56:27,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 12:56:27,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:27,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 12:56:27,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 12:56:27,870 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 33 states. [2020-07-21 12:56:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:29,088 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2020-07-21 12:56:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 12:56:29,089 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 160 [2020-07-21 12:56:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:29,093 INFO L225 Difference]: With dead ends: 137 [2020-07-21 12:56:29,093 INFO L226 Difference]: Without dead ends: 84 [2020-07-21 12:56:29,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 263 SyntacticMatches, 25 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=807, Invalid=3353, Unknown=0, NotChecked=0, Total=4160 [2020-07-21 12:56:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-21 12:56:29,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-07-21 12:56:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 12:56:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-07-21 12:56:29,106 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 160 [2020-07-21 12:56:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:29,106 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-07-21 12:56:29,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 12:56:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-07-21 12:56:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-21 12:56:29,109 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:29,110 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:29,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:29,320 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:29,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:29,321 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 6 times [2020-07-21 12:56:29,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:29,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345247531] [2020-07-21 12:56:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:29,528 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:29,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:29,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 12:56:29,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 12:56:29,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:31,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:31,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:31,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:32,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:32,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:32,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:32,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2020-07-21 12:56:35,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345247531] [2020-07-21 12:56:35,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:35,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 30 [2020-07-21 12:56:35,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988383493] [2020-07-21 12:56:35,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 12:56:35,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:35,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 12:56:35,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-07-21 12:56:35,157 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 30 states. [2020-07-21 12:56:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:36,340 INFO L93 Difference]: Finished difference Result 152 states and 202 transitions. [2020-07-21 12:56:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 12:56:36,341 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 173 [2020-07-21 12:56:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:36,343 INFO L225 Difference]: With dead ends: 152 [2020-07-21 12:56:36,343 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 12:56:36,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 285 SyntacticMatches, 32 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=867, Invalid=3293, Unknown=0, NotChecked=0, Total=4160 [2020-07-21 12:56:36,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 12:56:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2020-07-21 12:56:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 12:56:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2020-07-21 12:56:36,358 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 173 [2020-07-21 12:56:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:36,359 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2020-07-21 12:56:36,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 12:56:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2020-07-21 12:56:36,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-21 12:56:36,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:36,363 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:36,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:36,577 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:36,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 7 times [2020-07-21 12:56:36,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:36,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036430254] [2020-07-21 12:56:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:36,855 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:36,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:36,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-21 12:56:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-07-21 12:56:37,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 597 proven. 189 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2020-07-21 12:56:39,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036430254] [2020-07-21 12:56:39,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:39,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 35 [2020-07-21 12:56:39,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514795421] [2020-07-21 12:56:39,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 12:56:39,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:39,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 12:56:39,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 12:56:39,591 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand 35 states. [2020-07-21 12:56:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:50,838 INFO L93 Difference]: Finished difference Result 323 states and 516 transitions. [2020-07-21 12:56:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-07-21 12:56:50,840 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 186 [2020-07-21 12:56:50,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:50,845 INFO L225 Difference]: With dead ends: 323 [2020-07-21 12:56:50,845 INFO L226 Difference]: Without dead ends: 145 [2020-07-21 12:56:50,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6305 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2142, Invalid=20208, Unknown=0, NotChecked=0, Total=22350 [2020-07-21 12:56:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-21 12:56:50,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2020-07-21 12:56:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-21 12:56:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2020-07-21 12:56:50,874 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 186 [2020-07-21 12:56:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:50,875 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2020-07-21 12:56:50,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 12:56:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2020-07-21 12:56:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-21 12:56:50,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:50,879 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:51,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:51,092 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:51,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:51,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2090243986, now seen corresponding path program 8 times [2020-07-21 12:56:51,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:51,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070672824] [2020-07-21 12:56:51,094 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:51,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:51,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:51,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-21 12:56:51,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2020-07-21 12:56:51,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:54,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:54,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:55,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:55,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:55,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:55,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:55,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:55,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:55,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:55,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 685 proven. 580 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2020-07-21 12:56:59,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070672824] [2020-07-21 12:56:59,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:59,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32] total 34 [2020-07-21 12:56:59,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146117723] [2020-07-21 12:56:59,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 12:56:59,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:59,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 12:56:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 12:56:59,061 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand 34 states. [2020-07-21 12:57:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:00,663 INFO L93 Difference]: Finished difference Result 238 states and 329 transitions. [2020-07-21 12:57:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 12:57:00,664 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 199 [2020-07-21 12:57:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:00,667 INFO L225 Difference]: With dead ends: 238 [2020-07-21 12:57:00,667 INFO L226 Difference]: Without dead ends: 123 [2020-07-21 12:57:00,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 329 SyntacticMatches, 36 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=685, Invalid=2855, Unknown=0, NotChecked=0, Total=3540 [2020-07-21 12:57:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-21 12:57:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-07-21 12:57:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 12:57:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2020-07-21 12:57:00,685 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 199 [2020-07-21 12:57:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:00,685 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2020-07-21 12:57:00,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 12:57:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2020-07-21 12:57:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-07-21 12:57:00,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:00,691 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:57:00,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:00,906 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:00,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:00,906 INFO L82 PathProgramCache]: Analyzing trace with hash 469178039, now seen corresponding path program 9 times [2020-07-21 12:57:00,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:00,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927772112] [2020-07-21 12:57:00,907 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:01,255 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:01,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:01,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 12:57:01,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1340 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-07-21 12:57:01,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:03,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:03,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:03,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:03,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:04,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:04,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:04,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:04,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 274 proven. 806 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2020-07-21 12:57:05,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927772112] [2020-07-21 12:57:05,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:05,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 23 [2020-07-21 12:57:05,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166417617] [2020-07-21 12:57:05,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 12:57:05,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:05,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 12:57:05,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-07-21 12:57:05,091 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand 23 states. [2020-07-21 12:57:05,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:05,807 INFO L93 Difference]: Finished difference Result 172 states and 224 transitions. [2020-07-21 12:57:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 12:57:05,809 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 212 [2020-07-21 12:57:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:05,811 INFO L225 Difference]: With dead ends: 172 [2020-07-21 12:57:05,811 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 12:57:05,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 380 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 12:57:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 12:57:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-07-21 12:57:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 12:57:05,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2020-07-21 12:57:05,822 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 212 [2020-07-21 12:57:05,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:05,822 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2020-07-21 12:57:05,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 12:57:05,823 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2020-07-21 12:57:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-07-21 12:57:05,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:05,827 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:57:06,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:06,041 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:06,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:06,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024914, now seen corresponding path program 10 times [2020-07-21 12:57:06,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:06,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011152764] [2020-07-21 12:57:06,042 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:06,442 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:06,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:06,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 12:57:06,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 507 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2020-07-21 12:57:06,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:07,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:07,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:07,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:07,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 522 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2020-07-21 12:57:08,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011152764] [2020-07-21 12:57:08,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:08,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-21 12:57:08,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560273742] [2020-07-21 12:57:08,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 12:57:08,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:08,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 12:57:08,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-21 12:57:08,093 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand 12 states. [2020-07-21 12:57:08,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:08,258 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2020-07-21 12:57:08,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 12:57:08,259 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 284 [2020-07-21 12:57:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:08,260 INFO L225 Difference]: With dead ends: 85 [2020-07-21 12:57:08,260 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 12:57:08,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 548 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:57:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 12:57:08,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 12:57:08,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 12:57:08,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 12:57:08,263 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 284 [2020-07-21 12:57:08,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:08,265 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 12:57:08,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 12:57:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 12:57:08,266 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 12:57:08,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:08,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 12:57:09,084 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2020-07-21 12:57:09,223 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2020-07-21 12:57:09,526 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 117 [2020-07-21 12:57:14,632 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 10 [2020-07-21 12:57:18,505 WARN L193 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 320 DAG size of output: 59 [2020-07-21 12:57:18,775 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 12 [2020-07-21 12:57:18,924 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 1 [2020-07-21 12:57:18,927 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 12:57:18,928 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:57:18,928 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:57:18,928 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 12:57:18,928 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 12:57:18,928 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 12:57:18,929 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 12:57:18,929 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 12:57:18,929 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= ackermann_~n |ackermann_#in~n|) (<= |ackermann_#in~n| ackermann_~n) (<= ackermann_~m |ackermann_#in~m|)) [2020-07-21 12:57:18,929 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-21 12:57:18,929 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= 0 |ackermann_#in~n|) (= ackermann_~n |ackermann_#in~n|) (<= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| 0)) [2020-07-21 12:57:18,930 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse11 (<= |ackermann_#in~m| ackermann_~m)) (.cse13 (<= |ackermann_#in~n| ackermann_~n)) (.cse12 (<= ackermann_~m |ackermann_#in~m|))) (let ((.cse4 (and .cse11 (<= |ackermann_#in~m| 0) .cse13 (<= 0 |ackermann_#in~m|) .cse12)) (.cse1 (<= |ackermann_#in~m| 1)) (.cse5 (<= 2 |ackermann_#in~m|))) (and (let ((.cse2 (<= 3 |ackermann_#in~n|)) (.cse3 (<= 5 |ackermann_#t~ret1|)) (.cse6 (<= 2 |ackermann_#in~n|)) (.cse9 (<= 3 |ackermann_#t~ret1|)) (.cse10 (<= |ackermann_#t~ret1| 3)) (.cse0 (= ackermann_~n |ackermann_#in~n|)) (.cse7 (< |ackermann_#in~n| 2)) (.cse8 (<= 1 |ackermann_#in~n|))) (or (<= 3 |ackermann_#in~m|) (and .cse0 .cse1 .cse2 (<= |ackermann_#in~n| 3) (= 4 |ackermann_#t~ret1|)) (and (<= 4 |ackermann_#in~n|) (<= |ackermann_#in~n| 4) .cse0 (= 5 |ackermann_#t~ret1|)) (and (<= 6 |ackermann_#in~n|) .cse0 .cse3) .cse4 (and .cse5 .cse0 .cse3 .cse2) (and .cse5 (<= |ackermann_#t~ret1| 5) .cse0 .cse3 .cse6) (and .cse0 .cse7 .cse1 (= 2 |ackermann_#t~ret1|) .cse8) (and .cse9 .cse10 .cse0 .cse6 .cse1 (<= |ackermann_#in~n| 2)) (and .cse0 (<= 5 |ackermann_#in~n|) (= 6 |ackermann_#t~ret1|)) (and .cse9 .cse5 .cse10 .cse0 .cse7 .cse8))) (or .cse4 (and .cse11 .cse1 .cse12 (<= 1 |ackermann_#in~m|)) (and .cse11 .cse5 .cse13 .cse12))))) [2020-07-21 12:57:18,930 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-21 12:57:18,930 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-21 12:57:18,931 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-21 12:57:18,931 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-21 12:57:18,931 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 12:57:18,931 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-21 12:57:18,932 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-21 12:57:18,932 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-21 12:57:18,932 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-21 12:57:18,932 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-21 12:57:18,932 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-21 12:57:18,932 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-21 12:57:18,933 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-21 12:57:18,933 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-21 12:57:18,933 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-21 12:57:18,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:57:18 BoogieIcfgContainer [2020-07-21 12:57:18,938 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 12:57:18,940 INFO L168 Benchmark]: Toolchain (without parser) took 73311.94 ms. Allocated memory was 139.5 MB in the beginning and 554.2 MB in the end (delta: 414.7 MB). Free memory was 104.5 MB in the beginning and 92.0 MB in the end (delta: 12.5 MB). Peak memory consumption was 430.4 MB. Max. memory is 7.1 GB. [2020-07-21 12:57:18,947 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 12:57:18,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.99 ms. Allocated memory is still 139.5 MB. Free memory was 104.3 MB in the beginning and 94.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 12:57:18,948 INFO L168 Benchmark]: Boogie Preprocessor took 31.62 ms. Allocated memory is still 139.5 MB. Free memory was 94.4 MB in the beginning and 92.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 12:57:18,951 INFO L168 Benchmark]: RCFGBuilder took 411.85 ms. Allocated memory was 139.5 MB in the beginning and 207.6 MB in the end (delta: 68.2 MB). Free memory was 92.9 MB in the beginning and 174.2 MB in the end (delta: -81.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 12:57:18,952 INFO L168 Benchmark]: TraceAbstraction took 72622.83 ms. Allocated memory was 207.6 MB in the beginning and 554.2 MB in the end (delta: 346.6 MB). Free memory was 173.5 MB in the beginning and 92.0 MB in the end (delta: 81.5 MB). Peak memory consumption was 431.2 MB. Max. memory is 7.1 GB. [2020-07-21 12:57:18,961 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 239.99 ms. Allocated memory is still 139.5 MB. Free memory was 104.3 MB in the beginning and 94.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.62 ms. Allocated memory is still 139.5 MB. Free memory was 94.4 MB in the beginning and 92.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 411.85 ms. Allocated memory was 139.5 MB in the beginning and 207.6 MB in the end (delta: 68.2 MB). Free memory was 92.9 MB in the beginning and 174.2 MB in the end (delta: -81.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 72622.83 ms. Allocated memory was 207.6 MB in the beginning and 554.2 MB in the end (delta: 346.6 MB). Free memory was 173.5 MB in the beginning and 92.0 MB in the end (delta: 81.5 MB). Peak memory consumption was 431.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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: 62.0s, OverallIterations: 13, TraceHistogramMax: 42, AutomataDifference: 18.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 10.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 411 SDtfs, 611 SDslu, 2598 SDs, 0 SdLazy, 9349 SolverSat, 1877 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3829 GetRequests, 3094 SyntacticMatches, 184 SemanticMatches, 551 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11475 ImplicationChecksByTransitivity, 15.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=10, 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, 13 MinimizatonAttempts, 172 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 645 PreInvPairs, 6196 NumberOfFragments, 231 HoareAnnotationTreeSize, 645 FomulaSimplifications, 1005512 FormulaSimplificationTreeSizeReduction, 5.7s HoareSimplificationTime, 9 FomulaSimplificationsInter, 160786 FormulaSimplificationTreeSizeReductionInter, 4.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 37.5s InterpolantComputationTime, 1778 NumberOfCodeBlocks, 1699 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 3516 ConstructedInterpolants, 0 QuantifiedInterpolants, 1166092 SizeOfPredicates, 106 NumberOfNonLiveVariables, 5125 ConjunctsInSsa, 326 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 26186/32304 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...