/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:56:15,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:56:15,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:56:15,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:56:15,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:56:15,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:56:15,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:56:15,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:56:15,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:56:15,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:56:15,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:56:15,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:56:15,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:56:15,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:56:15,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:56:15,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:56:15,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:56:15,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:56:15,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:56:15,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:56:15,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:56:15,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:56:15,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:56:15,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:56:15,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:56:15,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:56:15,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:56:15,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:56:15,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 16:56:15,511 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:56:15,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:56:15,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:56:15,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:56:15,518 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:56:15,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:56:15,518 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:56:15,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:56:15,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:56:15,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:56:15,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:56:15,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:56:15,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:56:15,522 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:56:15,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:56:15,523 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:56:15,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:56:15,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:56:15,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:56:15,524 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:56:15,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:56:15,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:56:15,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:56:15,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:56:15,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:56:15,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:56:15,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:15,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:56:15,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:56:15,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:56:15,936 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:56:15,958 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:56:15,964 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:56:15,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:56:15,968 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:56:15,969 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-20 16:56:16,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22c2bb7ee/8381638fd3724184bce939a4119152af/FLAG19f71c02c [2020-07-20 16:56:16,863 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:56:16,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-20 16:56:16,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22c2bb7ee/8381638fd3724184bce939a4119152af/FLAG19f71c02c [2020-07-20 16:56:17,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22c2bb7ee/8381638fd3724184bce939a4119152af [2020-07-20 16:56:17,150 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:56:17,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:56:17,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:56:17,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:56:17,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:56:17,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:56:17" (1/1) ... [2020-07-20 16:56:17,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9bc63f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:17, skipping insertion in model container [2020-07-20 16:56:17,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:56:17" (1/1) ... [2020-07-20 16:56:17,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:56:17,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:56:17,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:56:17,399 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:56:17,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:56:17,434 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:56:17,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:17 WrapperNode [2020-07-20 16:56:17,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:56:17,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:56:17,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:56:17,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:56:17,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:17" (1/1) ... [2020-07-20 16:56:17,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:17" (1/1) ... [2020-07-20 16:56:17,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:17" (1/1) ... [2020-07-20 16:56:17,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:17" (1/1) ... [2020-07-20 16:56:17,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:17" (1/1) ... [2020-07-20 16:56:17,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:17" (1/1) ... [2020-07-20 16:56:17,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:17" (1/1) ... [2020-07-20 16:56:17,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:56:17,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:56:17,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:56:17,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:56:17,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:56:17,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:56:17,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:56:17,641 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-20 16:56:17,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:56:17,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 16:56:17,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:56:17,642 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-20 16:56:17,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:56:17,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:56:17,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:56:17,837 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:56:17,837 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 16:56:17,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:56:17 BoogieIcfgContainer [2020-07-20 16:56:17,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:56:17,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:56:17,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:56:17,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:56:17,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:56:17" (1/3) ... [2020-07-20 16:56:17,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b68eb66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:56:17, skipping insertion in model container [2020-07-20 16:56:17,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:17" (2/3) ... [2020-07-20 16:56:17,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b68eb66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:56:17, skipping insertion in model container [2020-07-20 16:56:17,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:56:17" (3/3) ... [2020-07-20 16:56:17,880 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2020-07-20 16:56:17,912 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:56:17,927 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:56:17,944 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:56:17,972 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:56:17,972 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:56:17,973 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:56:17,973 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:56:17,973 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:56:17,973 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:56:17,973 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:56:17,973 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:56:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 16:56:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 16:56:18,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:18,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:18,009 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:18,020 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-20 16:56:18,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:18,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684816467] [2020-07-20 16:56:18,030 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:18,097 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:18,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:18,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:56:18,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:56:18,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:56:18,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684816467] [2020-07-20 16:56:18,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:56:18,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:56:18,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936767343] [2020-07-20 16:56:18,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:56:18,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:18,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:56:18,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:56:18,218 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 16:56:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:18,333 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-20 16:56:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:56:18,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 16:56:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:18,347 INFO L225 Difference]: With dead ends: 35 [2020-07-20 16:56:18,347 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 16:56:18,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:56:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 16:56:18,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 16:56:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 16:56:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 16:56:18,405 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 16:56:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:18,406 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 16:56:18,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:56:18,406 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 16:56:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 16:56:18,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:18,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:18,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:18,625 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-20 16:56:18,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:18,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277218759] [2020-07-20 16:56:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:18,653 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:18,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:18,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:56:18,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:56:18,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:56:18,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277218759] [2020-07-20 16:56:18,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:56:18,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:56:18,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817806824] [2020-07-20 16:56:18,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:56:18,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:18,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:56:18,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:56:18,697 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 16:56:18,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:18,761 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 16:56:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:56:18,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 16:56:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:18,764 INFO L225 Difference]: With dead ends: 27 [2020-07-20 16:56:18,764 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 16:56:18,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:56:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 16:56:18,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 16:56:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 16:56:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 16:56:18,775 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 16:56:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:18,775 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 16:56:18,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:56:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 16:56:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 16:56:18,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:18,778 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:18,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:18,992 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:18,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:18,994 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-20 16:56:18,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:18,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075491779] [2020-07-20 16:56:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:19,029 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:19,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:19,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:56:19,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 16:56:19,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:19,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:56:19,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075491779] [2020-07-20 16:56:19,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:19,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 16:56:19,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214799542] [2020-07-20 16:56:19,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 16:56:19,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:19,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 16:56:19,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 16:56:19,405 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 16:56:19,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:19,562 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-20 16:56:19,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:56:19,562 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 16:56:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:19,565 INFO L225 Difference]: With dead ends: 32 [2020-07-20 16:56:19,566 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 16:56:19,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:56:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 16:56:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 16:56:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 16:56:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 16:56:19,580 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-20 16:56:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:19,580 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 16:56:19,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 16:56:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 16:56:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 16:56:19,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:19,583 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:19,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:19,785 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:19,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:19,786 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-20 16:56:19,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:19,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805649739] [2020-07-20 16:56:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:19,836 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:19,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:19,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:56:19,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 16:56:19,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:20,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:56:20,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805649739] [2020-07-20 16:56:20,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:20,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 16:56:20,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405062385] [2020-07-20 16:56:20,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 16:56:20,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:20,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 16:56:20,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 16:56:20,234 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-20 16:56:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:20,435 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-20 16:56:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:56:20,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 16:56:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:20,440 INFO L225 Difference]: With dead ends: 37 [2020-07-20 16:56:20,446 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 16:56:20,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:56:20,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 16:56:20,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-20 16:56:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 16:56:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 16:56:20,475 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-20 16:56:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:20,477 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 16:56:20,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 16:56:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 16:56:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 16:56:20,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:20,484 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:20,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:20,700 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:20,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:20,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-20 16:56:20,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:20,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136177034] [2020-07-20 16:56:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:20,761 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:20,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:20,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:56:20,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:56:20,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:21,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:21,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:21,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:21,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 16:56:21,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136177034] [2020-07-20 16:56:21,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:21,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 16:56:21,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127059257] [2020-07-20 16:56:21,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 16:56:21,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:21,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 16:56:21,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:56:21,231 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-20 16:56:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:21,469 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-20 16:56:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 16:56:21,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 16:56:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:21,473 INFO L225 Difference]: With dead ends: 42 [2020-07-20 16:56:21,474 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 16:56:21,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:56:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 16:56:21,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-20 16:56:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 16:56:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 16:56:21,489 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-20 16:56:21,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:21,490 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 16:56:21,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 16:56:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 16:56:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 16:56:21,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:21,493 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:21,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:21,695 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:21,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:21,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-20 16:56:21,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:21,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130717737] [2020-07-20 16:56:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:21,746 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:21,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:21,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:56:21,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 16:56:21,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:22,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:22,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:22,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 16:56:22,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130717737] [2020-07-20 16:56:22,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:22,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 16:56:22,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762856451] [2020-07-20 16:56:22,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 16:56:22,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:22,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 16:56:22,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:56:22,161 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-20 16:56:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:22,299 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-20 16:56:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 16:56:22,300 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 16:56:22,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:22,302 INFO L225 Difference]: With dead ends: 47 [2020-07-20 16:56:22,302 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 16:56:22,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:56:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 16:56:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-20 16:56:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 16:56:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 16:56:22,316 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-20 16:56:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:22,317 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 16:56:22,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 16:56:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 16:56:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 16:56:22,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:22,323 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:22,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:22,525 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:22,525 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-20 16:56:22,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:22,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946604326] [2020-07-20 16:56:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:22,574 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:22,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:22,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:56:22,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 16:56:22,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:23,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:23,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:23,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:23,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:23,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 16:56:23,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946604326] [2020-07-20 16:56:23,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:23,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 16:56:23,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007485815] [2020-07-20 16:56:23,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 16:56:23,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:23,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 16:56:23,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:56:23,296 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-20 16:56:23,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:23,473 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-20 16:56:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:56:23,474 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 16:56:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:23,477 INFO L225 Difference]: With dead ends: 52 [2020-07-20 16:56:23,477 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 16:56:23,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:56:23,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 16:56:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-20 16:56:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 16:56:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 16:56:23,491 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-20 16:56:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:23,492 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 16:56:23,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 16:56:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 16:56:23,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 16:56:23,495 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:23,495 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:23,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:23,710 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:23,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:23,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-20 16:56:23,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:23,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829802089] [2020-07-20 16:56:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:56:23,765 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:56:23,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:23,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 16:56:23,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 171 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-20 16:56:23,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:24,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:24,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:24,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:25,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:25,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:25,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 193 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-07-20 16:56:25,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829802089] [2020-07-20 16:56:25,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:25,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 21 [2020-07-20 16:56:25,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513007137] [2020-07-20 16:56:25,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 16:56:25,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:25,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 16:56:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:56:25,217 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 21 states. [2020-07-20 16:56:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:25,813 INFO L93 Difference]: Finished difference Result 94 states and 184 transitions. [2020-07-20 16:56:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 16:56:25,814 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-07-20 16:56:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:25,816 INFO L225 Difference]: With dead ends: 94 [2020-07-20 16:56:25,816 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 16:56:25,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 164 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=981, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 16:56:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 16:56:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-07-20 16:56:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 16:56:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-07-20 16:56:25,832 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 96 [2020-07-20 16:56:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:25,832 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-07-20 16:56:25,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 16:56:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-07-20 16:56:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 16:56:25,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:25,835 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:26,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:26,049 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:26,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:26,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 4 times [2020-07-20 16:56:26,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:26,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349072088] [2020-07-20 16:56:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:56:26,106 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:26,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:26,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:56:26,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 16:56:26,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:26,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:26,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:26,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-07-20 16:56:26,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349072088] [2020-07-20 16:56:26,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:26,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 16:56:26,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898684916] [2020-07-20 16:56:26,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 16:56:26,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:26,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 16:56:26,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:56:26,729 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 13 states. [2020-07-20 16:56:26,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:26,876 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-07-20 16:56:26,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:56:26,877 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-07-20 16:56:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:26,879 INFO L225 Difference]: With dead ends: 65 [2020-07-20 16:56:26,879 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 16:56:26,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:56:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 16:56:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-20 16:56:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 16:56:26,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-20 16:56:26,889 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 68 [2020-07-20 16:56:26,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:26,890 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-20 16:56:26,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 16:56:26,890 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-20 16:56:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 16:56:26,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:26,892 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:27,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:27,107 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:27,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2020-07-20 16:56:27,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:27,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019098087] [2020-07-20 16:56:27,110 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:56:27,179 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:27,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:27,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 16:56:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-20 16:56:27,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:27,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:28,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:28,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:28,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:28,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-07-20 16:56:28,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019098087] [2020-07-20 16:56:28,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:28,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 16:56:28,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691958411] [2020-07-20 16:56:28,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 16:56:28,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:28,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 16:56:28,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 16:56:28,208 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 15 states. [2020-07-20 16:56:28,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:28,375 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-07-20 16:56:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:56:28,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 109 [2020-07-20 16:56:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:28,377 INFO L225 Difference]: With dead ends: 68 [2020-07-20 16:56:28,378 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 16:56:28,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:56:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 16:56:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-20 16:56:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 16:56:28,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-20 16:56:28,405 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 109 [2020-07-20 16:56:28,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:28,406 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-20 16:56:28,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 16:56:28,406 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-20 16:56:28,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-20 16:56:28,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:28,412 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:28,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:28,627 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:28,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:28,628 INFO L82 PathProgramCache]: Analyzing trace with hash 706081956, now seen corresponding path program 6 times [2020-07-20 16:56:28,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:28,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862750326] [2020-07-20 16:56:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:56:28,724 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:56:28,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 16:56:28,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 839 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-20 16:56:28,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:30,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:30,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:30,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:30,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:30,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:31,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:31,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:31,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:31,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:31,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:31,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 891 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2020-07-20 16:56:31,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862750326] [2020-07-20 16:56:31,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:31,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-20 16:56:31,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742628538] [2020-07-20 16:56:31,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 16:56:31,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:31,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 16:56:31,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-20 16:56:31,529 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 25 states. [2020-07-20 16:56:32,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:32,289 INFO L93 Difference]: Finished difference Result 144 states and 221 transitions. [2020-07-20 16:56:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 16:56:32,290 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 218 [2020-07-20 16:56:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:32,293 INFO L225 Difference]: With dead ends: 144 [2020-07-20 16:56:32,293 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 16:56:32,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 391 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 16:56:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 16:56:32,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-07-20 16:56:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 16:56:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2020-07-20 16:56:32,307 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 218 [2020-07-20 16:56:32,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:32,307 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2020-07-20 16:56:32,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 16:56:32,308 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2020-07-20 16:56:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-20 16:56:32,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:32,310 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:32,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:32,525 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:32,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:32,526 INFO L82 PathProgramCache]: Analyzing trace with hash 259499213, now seen corresponding path program 7 times [2020-07-20 16:56:32,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:32,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174783388] [2020-07-20 16:56:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:56:32,631 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:32,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:32,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:56:32,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-07-20 16:56:32,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:33,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:33,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:33,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:34,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:34,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:34,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:34,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 573 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2020-07-20 16:56:34,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174783388] [2020-07-20 16:56:34,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:34,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-20 16:56:34,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190528521] [2020-07-20 16:56:34,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 16:56:34,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:34,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 16:56:34,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:56:34,253 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand 16 states. [2020-07-20 16:56:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:34,464 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2020-07-20 16:56:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 16:56:34,465 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 177 [2020-07-20 16:56:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:34,466 INFO L225 Difference]: With dead ends: 85 [2020-07-20 16:56:34,466 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 16:56:34,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 326 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-07-20 16:56:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 16:56:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-20 16:56:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 16:56:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-07-20 16:56:34,491 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 177 [2020-07-20 16:56:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:34,492 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-07-20 16:56:34,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 16:56:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-07-20 16:56:34,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-20 16:56:34,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:34,501 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:34,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:34,714 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:34,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:34,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 8 times [2020-07-20 16:56:34,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:34,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992941788] [2020-07-20 16:56:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:56:34,881 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:56:34,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:34,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 167 conjunts are in the unsatisfiable core [2020-07-20 16:56:34,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-20 16:56:35,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-20 16:56:38,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992941788] [2020-07-20 16:56:38,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:38,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-20 16:56:38,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071546126] [2020-07-20 16:56:38,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 16:56:38,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:38,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 16:56:38,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-20 16:56:38,405 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 28 states. [2020-07-20 16:56:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:38,805 INFO L93 Difference]: Finished difference Result 102 states and 144 transitions. [2020-07-20 16:56:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 16:56:38,805 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 286 [2020-07-20 16:56:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:38,808 INFO L225 Difference]: With dead ends: 102 [2020-07-20 16:56:38,808 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 16:56:38,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 534 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-20 16:56:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 16:56:38,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-07-20 16:56:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 16:56:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2020-07-20 16:56:38,819 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 286 [2020-07-20 16:56:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:38,820 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2020-07-20 16:56:38,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 16:56:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2020-07-20 16:56:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-07-20 16:56:38,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:38,823 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 43, 26, 26, 26, 26, 26, 26, 26, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:39,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:39,031 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:39,032 INFO L82 PathProgramCache]: Analyzing trace with hash -120387169, now seen corresponding path program 9 times [2020-07-20 16:56:39,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:39,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36303733] [2020-07-20 16:56:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:39,192 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:56:39,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 16:56:39,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7715 backedges. 1165 proven. 2000 refuted. 0 times theorem prover too weak. 4550 trivial. 0 not checked. [2020-07-20 16:56:39,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:41,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:42,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:42,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:42,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:42,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:42,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:42,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:42,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:42,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:42,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:42,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:43,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:43,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:44,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:44,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:44,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:44,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:44,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:44,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7715 backedges. 1165 proven. 2097 refuted. 0 times theorem prover too weak. 4453 trivial. 0 not checked. [2020-07-20 16:56:44,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36303733] [2020-07-20 16:56:44,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:44,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 33 [2020-07-20 16:56:44,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165734220] [2020-07-20 16:56:44,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 16:56:44,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:44,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 16:56:44,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 16:56:44,592 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand 33 states. [2020-07-20 16:56:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:46,018 INFO L93 Difference]: Finished difference Result 223 states and 422 transitions. [2020-07-20 16:56:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 16:56:46,019 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 368 [2020-07-20 16:56:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:46,025 INFO L225 Difference]: With dead ends: 223 [2020-07-20 16:56:46,025 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 16:56:46,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 679 SyntacticMatches, 25 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=963, Invalid=3069, Unknown=0, NotChecked=0, Total=4032 [2020-07-20 16:56:46,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 16:56:46,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 115. [2020-07-20 16:56:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-07-20 16:56:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 165 transitions. [2020-07-20 16:56:46,052 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 165 transitions. Word has length 368 [2020-07-20 16:56:46,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:46,052 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 165 transitions. [2020-07-20 16:56:46,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 16:56:46,053 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 165 transitions. [2020-07-20 16:56:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-07-20 16:56:46,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:46,057 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 46, 28, 28, 28, 28, 28, 28, 28, 18, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:46,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:46,271 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:46,272 INFO L82 PathProgramCache]: Analyzing trace with hash 161946605, now seen corresponding path program 10 times [2020-07-20 16:56:46,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:46,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550088277] [2020-07-20 16:56:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:46,483 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:56:46,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:46,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 16:56:46,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8931 backedges. 1383 proven. 1865 refuted. 0 times theorem prover too weak. 5683 trivial. 0 not checked. [2020-07-20 16:56:46,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:48,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:48,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:48,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:48,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:48,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:48,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:48,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:50,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:50,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:50,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:50,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:50,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:51,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:51,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:51,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:51,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:51,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8931 backedges. 1383 proven. 1948 refuted. 0 times theorem prover too weak. 5600 trivial. 0 not checked. [2020-07-20 16:56:51,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550088277] [2020-07-20 16:56:51,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:51,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-20 16:56:51,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827041991] [2020-07-20 16:56:51,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 16:56:51,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:51,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 16:56:51,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2020-07-20 16:56:51,439 INFO L87 Difference]: Start difference. First operand 115 states and 165 transitions. Second operand 29 states. [2020-07-20 16:56:52,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:52,271 INFO L93 Difference]: Finished difference Result 234 states and 351 transitions. [2020-07-20 16:56:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 16:56:52,272 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 395 [2020-07-20 16:56:52,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:52,275 INFO L225 Difference]: With dead ends: 234 [2020-07-20 16:56:52,275 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 16:56:52,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 737 SyntacticMatches, 25 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=560, Invalid=1602, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 16:56:52,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 16:56:52,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2020-07-20 16:56:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 16:56:52,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 140 transitions. [2020-07-20 16:56:52,288 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 140 transitions. Word has length 395 [2020-07-20 16:56:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:52,289 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 140 transitions. [2020-07-20 16:56:52,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 16:56:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 140 transitions. [2020-07-20 16:56:52,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-20 16:56:52,293 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:52,293 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:52,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:52,508 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:52,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:52,509 INFO L82 PathProgramCache]: Analyzing trace with hash -229001048, now seen corresponding path program 11 times [2020-07-20 16:56:52,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:52,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133345321] [2020-07-20 16:56:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:52,777 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:52,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:52,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 16:56:52,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 480 proven. 2151 refuted. 0 times theorem prover too weak. 9756 trivial. 0 not checked. [2020-07-20 16:56:53,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:55,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:55,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:55,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:56,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:56,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:56,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:56,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:56,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:56,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 480 proven. 2228 refuted. 0 times theorem prover too weak. 9679 trivial. 0 not checked. [2020-07-20 16:56:57,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133345321] [2020-07-20 16:56:57,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:57,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-20 16:56:57,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737739520] [2020-07-20 16:56:57,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 16:56:57,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:57,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 16:56:57,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:56:57,030 INFO L87 Difference]: Start difference. First operand 101 states and 140 transitions. Second operand 20 states. [2020-07-20 16:56:57,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:57,306 INFO L93 Difference]: Finished difference Result 101 states and 140 transitions. [2020-07-20 16:56:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:56:57,306 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 463 [2020-07-20 16:56:57,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:57,308 INFO L225 Difference]: With dead ends: 101 [2020-07-20 16:56:57,308 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 16:56:57,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 890 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-20 16:56:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 16:56:57,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 16:56:57,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 16:56:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 16:56:57,310 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 463 [2020-07-20 16:56:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:57,310 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 16:56:57,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 16:56:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 16:56:57,311 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 16:56:57,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:57,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 16:56:57,742 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2020-07-20 16:56:58,300 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 38 [2020-07-20 16:56:58,434 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 16:56:58,434 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:56:58,435 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:56:58,435 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 16:56:58,435 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 16:56:58,435 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 16:56:58,435 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-07-20 16:56:58,435 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-07-20 16:56:58,436 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-20 16:56:58,436 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-20 16:56:58,436 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 7 main_~x~0) (<= main_~x~0 7)) [2020-07-20 16:56:58,436 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-07-20 16:56:58,436 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-20 16:56:58,436 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-07-20 16:56:58,436 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-07-20 16:56:58,436 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-07-20 16:56:58,436 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-07-20 16:56:58,436 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (<= 2 |fibo_#in~n|)) [2020-07-20 16:56:58,436 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-20 16:56:58,437 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (and (not (<= |fibo_#in~n| 1)) (let ((.cse0 (<= fibo_~n |fibo_#in~n|)) (.cse1 (<= |fibo_#in~n| fibo_~n))) (or (and (<= |fibo_#in~n| 6) .cse0 .cse1 (= 5 |fibo_#t~ret0|) (<= 6 |fibo_#in~n|)) (and (<= 5 |fibo_#in~n|) .cse0 .cse1 (<= |fibo_#in~n| 5) (= |fibo_#t~ret0| 3)) (and .cse0 .cse1 (<= 8 |fibo_#in~n|)) (and (<= 4 |fibo_#in~n|) (= |fibo_#t~ret0| 2) .cse1 (<= fibo_~n 4)) (and (= |fibo_#t~ret0| 1) .cse0 .cse1 (<= |fibo_#in~n| 3)) (and .cse1 (<= fibo_~n 7) (<= 7 |fibo_#in~n|) (= |fibo_#t~ret0| 8))))) [2020-07-20 16:56:58,437 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-07-20 16:56:58,437 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-07-20 16:56:58,437 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-07-20 16:56:58,437 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-07-20 16:56:58,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:56:58 BoogieIcfgContainer [2020-07-20 16:56:58,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:56:58,445 INFO L168 Benchmark]: Toolchain (without parser) took 41294.01 ms. Allocated memory was 144.2 MB in the beginning and 587.7 MB in the end (delta: 443.5 MB). Free memory was 101.1 MB in the beginning and 176.5 MB in the end (delta: -75.4 MB). Peak memory consumption was 368.1 MB. Max. memory is 7.1 GB. [2020-07-20 16:56:58,446 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 16:56:58,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.78 ms. Allocated memory is still 144.2 MB. Free memory was 100.9 MB in the beginning and 91.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 16:56:58,447 INFO L168 Benchmark]: Boogie Preprocessor took 31.99 ms. Allocated memory is still 144.2 MB. Free memory was 91.6 MB in the beginning and 90.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 16:56:58,448 INFO L168 Benchmark]: RCFGBuilder took 385.03 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 90.2 MB in the beginning and 169.6 MB in the end (delta: -79.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 16:56:58,449 INFO L168 Benchmark]: TraceAbstraction took 40584.89 ms. Allocated memory was 201.3 MB in the beginning and 587.7 MB in the end (delta: 386.4 MB). Free memory was 168.9 MB in the beginning and 176.5 MB in the end (delta: -7.6 MB). Peak memory consumption was 378.8 MB. Max. memory is 7.1 GB. [2020-07-20 16:56:58,459 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.78 ms. Allocated memory is still 144.2 MB. Free memory was 100.9 MB in the beginning and 91.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.99 ms. Allocated memory is still 144.2 MB. Free memory was 91.6 MB in the beginning and 90.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 385.03 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 90.2 MB in the beginning and 169.6 MB in the end (delta: -79.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 40584.89 ms. Allocated memory was 201.3 MB in the beginning and 587.7 MB in the end (delta: 386.4 MB). Free memory was 168.9 MB in the beginning and 176.5 MB in the end (delta: -7.6 MB). Peak memory consumption was 378.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: 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, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 39.5s, OverallIterations: 16, TraceHistogramMax: 67, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 386 SDtfs, 1520 SDslu, 2132 SDs, 0 SdLazy, 2639 SolverSat, 1892 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4905 GetRequests, 4378 SyntacticMatches, 171 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2684 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 113 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 203 PreInvPairs, 279 NumberOfFragments, 109 HoareAnnotationTreeSize, 203 FomulaSimplifications, 2473 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2362 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 28.1s InterpolantComputationTime, 2405 NumberOfCodeBlocks, 1624 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 4753 ConstructedInterpolants, 0 QuantifiedInterpolants, 2353391 SizeOfPredicates, 100 NumberOfNonLiveVariables, 4299 ConjunctsInSsa, 359 ConjunctsInUnsatCore, 30 InterpolantComputations, 2 PerfectInterpolantSequences, 59167/78630 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...