/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 BIGGEST_EQUIVALENCE_CLASS --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_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:19:13,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:19:13,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:19:13,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:19:13,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:19:13,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:19:13,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:19:13,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:19:13,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:19:13,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:19:13,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:19:13,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:19:13,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:19:13,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:19:13,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:19:13,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:19:13,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:19:13,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:19:13,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:19:13,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:19:13,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:19:13,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:19:13,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:19:13,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:19:13,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:19:13,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:19:13,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:19:13,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:19:13,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:19:13,942 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:19:13,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:19:13,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:19:13,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:19:13,944 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:19:13,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:19:13,945 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:19:13,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:19:13,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:19:13,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:19:13,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:19:13,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:19:13,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:19:13,949 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:19:13,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:19:13,949 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:19:13,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:19:13,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:19:13,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:19:13,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:19:13,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:19:13,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:19:13,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:19:13,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:19:13,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:19:13,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:19:13,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:13,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:19:13,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:19:13,952 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 22:19:14,236 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:19:14,251 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:19:14,254 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:19:14,256 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:19:14,256 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:19:14,257 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-21 22:19:14,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/445b43039/a4f4c0749ae64f79af4482399f3ca9a9/FLAG4bdb00db9 [2020-07-21 22:19:14,832 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:19:14,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-21 22:19:14,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/445b43039/a4f4c0749ae64f79af4482399f3ca9a9/FLAG4bdb00db9 [2020-07-21 22:19:15,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/445b43039/a4f4c0749ae64f79af4482399f3ca9a9 [2020-07-21 22:19:15,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:19:15,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:19:15,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:19:15,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:19:15,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:19:15,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:19:15" (1/1) ... [2020-07-21 22:19:15,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@775218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:15, skipping insertion in model container [2020-07-21 22:19:15,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:19:15" (1/1) ... [2020-07-21 22:19:15,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:19:15,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:19:15,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:19:15,418 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:19:15,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:19:15,453 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:19:15,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:15 WrapperNode [2020-07-21 22:19:15,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:19:15,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:19:15,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:19:15,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:19:15,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:15" (1/1) ... [2020-07-21 22:19:15,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:15" (1/1) ... [2020-07-21 22:19:15,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:15" (1/1) ... [2020-07-21 22:19:15,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:15" (1/1) ... [2020-07-21 22:19:15,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:15" (1/1) ... [2020-07-21 22:19:15,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:15" (1/1) ... [2020-07-21 22:19:15,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:15" (1/1) ... [2020-07-21 22:19:15,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:19:15,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:19:15,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:19:15,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:19:15,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:19:15,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:19:15,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:19:15,640 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 22:19:15,641 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 22:19:15,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:19:15,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:19:15,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:19:15,641 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 22:19:15,641 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 22:19:15,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:19:15,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:19:15,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:19:15,846 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:19:15,847 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:19:15,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:19:15 BoogieIcfgContainer [2020-07-21 22:19:15,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:19:15,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:19:15,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:19:15,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:19:15,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:19:15" (1/3) ... [2020-07-21 22:19:15,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9ed14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:19:15, skipping insertion in model container [2020-07-21 22:19:15,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:15" (2/3) ... [2020-07-21 22:19:15,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9ed14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:19:15, skipping insertion in model container [2020-07-21 22:19:15,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:19:15" (3/3) ... [2020-07-21 22:19:15,861 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-07-21 22:19:15,873 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:19:15,882 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:19:15,896 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:19:15,920 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:19:15,921 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:19:15,921 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:19:15,921 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:19:15,921 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:19:15,921 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:19:15,921 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:19:15,921 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:19:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 22:19:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:19:15,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:15,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:15,947 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:15,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:15,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 22:19:15,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:15,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670751024] [2020-07-21 22:19:15,961 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 [2020-07-21 22:19:16,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:16,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:16,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:19:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:19:16,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:19:16,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670751024] [2020-07-21 22:19:16,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:19:16,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:19:16,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681729324] [2020-07-21 22:19:16,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:19:16,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:16,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:19:16,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:19:16,211 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 22:19:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:16,327 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 22:19:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:19:16,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:19:16,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:16,340 INFO L225 Difference]: With dead ends: 44 [2020-07-21 22:19:16,341 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 22:19:16,345 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 [2020-07-21 22:19:16,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 22:19:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 22:19:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:19:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:19:16,391 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 22:19:16,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:16,391 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:19:16,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:19:16,392 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:19:16,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:19:16,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:16,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:16,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:16,596 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:16,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 22:19:16,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:16,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631787074] [2020-07-21 22:19:16,599 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 [2020-07-21 22:19:16,631 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:19:16,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:16,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:19:16,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:19:16,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:19:16,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631787074] [2020-07-21 22:19:16,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:19:16,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:19:16,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580263441] [2020-07-21 22:19:16,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:19:16,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:16,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:19:16,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:19:16,670 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 22:19:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:16,741 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 22:19:16,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:19:16,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:19:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:16,744 INFO L225 Difference]: With dead ends: 36 [2020-07-21 22:19:16,744 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 22:19:16,746 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 [2020-07-21 22:19:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 22:19:16,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 22:19:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:19:16,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:19:16,756 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 22:19:16,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:16,757 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:19:16,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:19:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:19:16,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:19:16,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:16,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:16,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:16,973 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:16,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:16,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 22:19:16,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:16,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448808654] [2020-07-21 22:19:16,975 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 [2020-07-21 22:19:17,003 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:17,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:17,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:19:17,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:19:17,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:17,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:17,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:19:17,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448808654] [2020-07-21 22:19:17,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:17,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:19:17,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289763721] [2020-07-21 22:19:17,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:19:17,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:17,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:19:17,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:19:17,351 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 22:19:17,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:17,487 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 22:19:17,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:19:17,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 22:19:17,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:17,490 INFO L225 Difference]: With dead ends: 41 [2020-07-21 22:19:17,491 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 22:19:17,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:19:17,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 22:19:17,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 22:19:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:19:17,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:19:17,502 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 22:19:17,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:17,502 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:19:17,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:19:17,502 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:19:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:19:17,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:17,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:17,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:17,719 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:17,720 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 22:19:17,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:17,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018774454] [2020-07-21 22:19:17,722 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) [2020-07-21 22:19:17,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:17,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:17,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:19:17,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:19:17,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:18,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:18,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:19:18,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018774454] [2020-07-21 22:19:18,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:18,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:19:18,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889919599] [2020-07-21 22:19:18,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:19:18,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:18,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:19:18,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:19:18,067 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 22:19:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:18,210 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 22:19:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:19:18,211 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 22:19:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:18,213 INFO L225 Difference]: With dead ends: 46 [2020-07-21 22:19:18,213 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:19:18,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:19:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:19:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 22:19:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:19:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:19:18,243 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 22:19:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:18,243 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:19:18,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:19:18,244 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:19:18,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 22:19:18,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:18,248 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:18,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:18,462 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:18,463 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 22:19:18,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:18,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840031311] [2020-07-21 22:19:18,465 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 [2020-07-21 22:19:18,502 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:18,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:18,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:19:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 22:19:18,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:18,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:18,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:18,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:19:18,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840031311] [2020-07-21 22:19:18,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:18,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:19:18,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175864745] [2020-07-21 22:19:18,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:19:18,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:18,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:19:18,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:19:18,932 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 22:19:19,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:19,109 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 22:19:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:19:19,110 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 22:19:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:19,112 INFO L225 Difference]: With dead ends: 51 [2020-07-21 22:19:19,112 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 22:19:19,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:19:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 22:19:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 22:19:19,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:19:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:19:19,123 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 22:19:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:19,124 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:19:19,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:19:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:19:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 22:19:19,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:19,127 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:19,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:19,343 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 22:19:19,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:19,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053539951] [2020-07-21 22:19:19,345 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 [2020-07-21 22:19:19,372 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:19,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:19,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:19:19,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 22:19:19,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:19,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:19,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:19,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:19:19,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053539951] [2020-07-21 22:19:19,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:19,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:19:19,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576804782] [2020-07-21 22:19:19,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:19:19,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:19,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:19:19,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:19:19,753 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 22:19:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:19,920 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 22:19:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:19:19,923 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 22:19:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:19,929 INFO L225 Difference]: With dead ends: 56 [2020-07-21 22:19:19,929 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 22:19:19,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:19:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 22:19:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 22:19:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:19:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:19:19,960 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 22:19:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:19,960 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:19:19,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:19:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:19:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 22:19:19,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:19,966 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:20,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:20,181 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:20,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:20,182 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 22:19:20,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:20,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15173686] [2020-07-21 22:19:20,183 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 [2020-07-21 22:19:20,248 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:20,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:20,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:19:20,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 22:19:20,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:20,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:20,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:20,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:20,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:19:20,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15173686] [2020-07-21 22:19:20,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:20,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:19:20,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180807597] [2020-07-21 22:19:20,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:19:20,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:20,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:19:20,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:19:20,874 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 22:19:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:21,078 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 22:19:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:19:21,079 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 22:19:21,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:21,085 INFO L225 Difference]: With dead ends: 61 [2020-07-21 22:19:21,086 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 22:19:21,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:19:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 22:19:21,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 22:19:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:19:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:19:21,110 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 22:19:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:21,111 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:19:21,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:19:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:19:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 22:19:21,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:21,122 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:21,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:21,323 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:21,324 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 22:19:21,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:21,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13598196] [2020-07-21 22:19:21,325 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 [2020-07-21 22:19:21,359 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:21,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:21,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:19:21,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 22:19:21,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:21,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:21,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:21,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:21,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:21,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:19:21,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13598196] [2020-07-21 22:19:21,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:21,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 22:19:21,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105033438] [2020-07-21 22:19:21,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:19:21,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:21,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:19:21,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:19:21,974 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 13 states. [2020-07-21 22:19:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:22,191 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 22:19:22,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:19:22,192 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-07-21 22:19:22,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:22,195 INFO L225 Difference]: With dead ends: 66 [2020-07-21 22:19:22,195 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 22:19:22,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:19:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 22:19:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 22:19:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:19:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:19:22,209 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 22:19:22,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:22,210 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:19:22,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:19:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:19:22,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 22:19:22,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:22,213 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:22,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:22,421 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:22,422 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 22:19:22,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:22,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491698545] [2020-07-21 22:19:22,424 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 [2020-07-21 22:19:22,474 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:22,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:22,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:19:22,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 22:19:22,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:23,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:23,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:23,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:23,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:23,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:23,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:23,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 22:19:23,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491698545] [2020-07-21 22:19:23,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:23,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:19:23,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825319331] [2020-07-21 22:19:23,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:19:23,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:23,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:19:23,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:19:23,495 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 15 states. [2020-07-21 22:19:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:23,741 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 22:19:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:19:23,742 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-07-21 22:19:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:23,745 INFO L225 Difference]: With dead ends: 71 [2020-07-21 22:19:23,745 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 22:19:23,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:19:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 22:19:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 22:19:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:19:23,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:19:23,758 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 22:19:23,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:23,759 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:19:23,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:19:23,759 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:19:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 22:19:23,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:23,761 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:23,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:23,975 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:23,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 22:19:23,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:23,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21079796] [2020-07-21 22:19:23,978 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 [2020-07-21 22:19:24,033 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:24,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:24,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:19:24,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 79 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-07-21 22:19:24,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:24,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:24,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:24,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:24,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 83 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-07-21 22:19:24,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21079796] [2020-07-21 22:19:24,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:24,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 22:19:24,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745498476] [2020-07-21 22:19:24,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:19:24,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:24,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:19:24,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:19:24,753 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 13 states. [2020-07-21 22:19:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:24,938 INFO L93 Difference]: Finished difference Result 84 states and 164 transitions. [2020-07-21 22:19:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:19:24,944 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-07-21 22:19:24,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:24,946 INFO L225 Difference]: With dead ends: 84 [2020-07-21 22:19:24,947 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 22:19:24,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 196 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:19:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 22:19:24,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2020-07-21 22:19:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 22:19:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-21 22:19:24,962 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 108 [2020-07-21 22:19:24,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:24,963 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-21 22:19:24,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:19:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-21 22:19:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 22:19:24,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:24,965 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:25,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:25,180 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:25,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:25,181 INFO L82 PathProgramCache]: Analyzing trace with hash -60364660, now seen corresponding path program 1 times [2020-07-21 22:19:25,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:25,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507744982] [2020-07-21 22:19:25,181 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 [2020-07-21 22:19:25,238 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:25,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:19:25,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 56 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-07-21 22:19:25,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:25,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:25,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:25,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-07-21 22:19:25,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507744982] [2020-07-21 22:19:25,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:25,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 22:19:25,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353182496] [2020-07-21 22:19:25,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:19:25,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:25,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:19:25,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:19:25,739 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 11 states. [2020-07-21 22:19:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:25,886 INFO L93 Difference]: Finished difference Result 79 states and 145 transitions. [2020-07-21 22:19:25,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:19:25,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2020-07-21 22:19:25,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:25,892 INFO L225 Difference]: With dead ends: 79 [2020-07-21 22:19:25,893 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 22:19:25,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 202 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:19:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 22:19:25,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-07-21 22:19:25,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 22:19:25,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 85 transitions. [2020-07-21 22:19:25,908 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 85 transitions. Word has length 109 [2020-07-21 22:19:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:25,909 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 85 transitions. [2020-07-21 22:19:25,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:19:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 85 transitions. [2020-07-21 22:19:25,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 22:19:25,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:25,915 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:26,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:26,116 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:26,117 INFO L82 PathProgramCache]: Analyzing trace with hash 836558126, now seen corresponding path program 1 times [2020-07-21 22:19:26,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:26,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151082388] [2020-07-21 22:19:26,118 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 [2020-07-21 22:19:26,184 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:26,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:26,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:19:26,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 105 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-07-21 22:19:26,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:26,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:27,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:27,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:27,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:27,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:27,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:27,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 113 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-07-21 22:19:27,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151082388] [2020-07-21 22:19:27,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:27,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:19:27,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641160733] [2020-07-21 22:19:27,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:19:27,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:27,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:19:27,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:19:27,251 INFO L87 Difference]: Start difference. First operand 54 states and 85 transitions. Second operand 15 states. [2020-07-21 22:19:27,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:27,540 INFO L93 Difference]: Finished difference Result 94 states and 199 transitions. [2020-07-21 22:19:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:19:27,541 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-07-21 22:19:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:27,543 INFO L225 Difference]: With dead ends: 94 [2020-07-21 22:19:27,543 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 22:19:27,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:19:27,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 22:19:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-07-21 22:19:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 22:19:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 95 transitions. [2020-07-21 22:19:27,572 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 95 transitions. Word has length 135 [2020-07-21 22:19:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:27,573 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 95 transitions. [2020-07-21 22:19:27,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:19:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 95 transitions. [2020-07-21 22:19:27,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:19:27,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:27,579 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:27,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:27,794 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:27,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1608635723, now seen corresponding path program 2 times [2020-07-21 22:19:27,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:27,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82641625] [2020-07-21 22:19:27,796 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 [2020-07-21 22:19:27,861 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:27,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:27,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:19:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 78 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-07-21 22:19:27,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:28,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:28,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:28,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:28,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:28,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 82 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-07-21 22:19:28,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82641625] [2020-07-21 22:19:28,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:28,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 22:19:28,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329945440] [2020-07-21 22:19:28,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:19:28,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:28,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:19:28,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:19:28,585 INFO L87 Difference]: Start difference. First operand 62 states and 95 transitions. Second operand 13 states. [2020-07-21 22:19:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:28,791 INFO L93 Difference]: Finished difference Result 92 states and 161 transitions. [2020-07-21 22:19:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:19:28,792 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-21 22:19:28,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:28,794 INFO L225 Difference]: With dead ends: 92 [2020-07-21 22:19:28,794 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 22:19:28,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 221 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:19:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 22:19:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-07-21 22:19:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:19:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 103 transitions. [2020-07-21 22:19:28,813 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 103 transitions. Word has length 121 [2020-07-21 22:19:28,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:28,814 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 103 transitions. [2020-07-21 22:19:28,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:19:28,814 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 103 transitions. [2020-07-21 22:19:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-21 22:19:28,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:28,816 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:29,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:29,032 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:29,032 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 3 times [2020-07-21 22:19:29,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:29,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611650169] [2020-07-21 22:19:29,033 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 [2020-07-21 22:19:29,120 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:19:29,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:29,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:19:29,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-21 22:19:29,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:29,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:29,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:29,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:29,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-07-21 22:19:29,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611650169] [2020-07-21 22:19:29,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:29,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 22:19:29,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872296278] [2020-07-21 22:19:29,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:19:29,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:29,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:19:29,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:19:29,592 INFO L87 Difference]: Start difference. First operand 65 states and 103 transitions. Second operand 11 states. [2020-07-21 22:19:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:29,725 INFO L93 Difference]: Finished difference Result 84 states and 140 transitions. [2020-07-21 22:19:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:19:29,726 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 95 [2020-07-21 22:19:29,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:29,728 INFO L225 Difference]: With dead ends: 84 [2020-07-21 22:19:29,728 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 22:19:29,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 173 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:19:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 22:19:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-07-21 22:19:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 22:19:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 122 transitions. [2020-07-21 22:19:29,745 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 122 transitions. Word has length 95 [2020-07-21 22:19:29,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:29,746 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 122 transitions. [2020-07-21 22:19:29,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:19:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 122 transitions. [2020-07-21 22:19:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-21 22:19:29,748 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:29,749 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:29,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:29,960 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:29,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:29,961 INFO L82 PathProgramCache]: Analyzing trace with hash 594466134, now seen corresponding path program 4 times [2020-07-21 22:19:29,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:29,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243663084] [2020-07-21 22:19:29,962 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 [2020-07-21 22:19:30,039 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:19:30,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:30,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:19:30,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 83 proven. 24 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-07-21 22:19:30,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:30,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:30,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:30,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:30,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:30,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-21 22:19:30,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243663084] [2020-07-21 22:19:30,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:30,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 22:19:30,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799945182] [2020-07-21 22:19:30,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:19:30,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:30,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:19:30,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:19:30,762 INFO L87 Difference]: Start difference. First operand 72 states and 122 transitions. Second operand 13 states. [2020-07-21 22:19:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:30,945 INFO L93 Difference]: Finished difference Result 92 states and 158 transitions. [2020-07-21 22:19:30,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:19:30,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 107 [2020-07-21 22:19:30,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:30,948 INFO L225 Difference]: With dead ends: 92 [2020-07-21 22:19:30,948 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 22:19:30,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 193 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:19:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 22:19:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2020-07-21 22:19:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 22:19:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-21 22:19:30,960 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 107 [2020-07-21 22:19:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:30,961 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-21 22:19:30,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:19:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-21 22:19:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 22:19:30,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:30,964 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:31,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:31,174 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:31,176 INFO L82 PathProgramCache]: Analyzing trace with hash 235412830, now seen corresponding path program 5 times [2020-07-21 22:19:31,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:31,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233441074] [2020-07-21 22:19:31,177 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 [2020-07-21 22:19:31,265 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:19:31,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:31,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:19:31,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 19 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-07-21 22:19:31,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:31,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:31,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:31,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:31,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 22:19:31,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233441074] [2020-07-21 22:19:31,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:31,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 22:19:31,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349876418] [2020-07-21 22:19:31,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:19:31,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:31,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:19:31,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:19:31,723 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 11 states. [2020-07-21 22:19:31,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:31,867 INFO L93 Difference]: Finished difference Result 91 states and 155 transitions. [2020-07-21 22:19:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:19:31,868 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-07-21 22:19:31,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:31,870 INFO L225 Difference]: With dead ends: 91 [2020-07-21 22:19:31,870 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 22:19:31,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:19:31,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 22:19:31,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-07-21 22:19:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 22:19:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-21 22:19:31,892 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 108 [2020-07-21 22:19:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:31,893 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-21 22:19:31,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:19:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-21 22:19:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 22:19:31,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:31,896 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:32,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:32,112 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:32,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:32,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 6 times [2020-07-21 22:19:32,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:32,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205743547] [2020-07-21 22:19:32,113 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:32,206 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:19:32,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:32,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-21 22:19:32,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-21 22:19:32,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-21 22:19:33,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205743547] [2020-07-21 22:19:33,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:33,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-21 22:19:33,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007523745] [2020-07-21 22:19:33,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 22:19:33,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:33,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 22:19:33,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:19:33,498 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 28 states. [2020-07-21 22:19:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:33,995 INFO L93 Difference]: Finished difference Result 148 states and 317 transitions. [2020-07-21 22:19:33,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 22:19:33,995 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-07-21 22:19:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:33,998 INFO L225 Difference]: With dead ends: 148 [2020-07-21 22:19:33,998 INFO L226 Difference]: Without dead ends: 144 [2020-07-21 22:19:34,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:19:34,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-21 22:19:34,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2020-07-21 22:19:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 22:19:34,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 226 transitions. [2020-07-21 22:19:34,024 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 226 transitions. Word has length 109 [2020-07-21 22:19:34,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:34,024 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 226 transitions. [2020-07-21 22:19:34,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 22:19:34,025 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 226 transitions. [2020-07-21 22:19:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-07-21 22:19:34,028 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:34,028 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:34,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:34,243 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:34,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:34,244 INFO L82 PathProgramCache]: Analyzing trace with hash -706406608, now seen corresponding path program 7 times [2020-07-21 22:19:34,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:34,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628866534] [2020-07-21 22:19:34,245 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:34,328 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:34,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:34,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:19:34,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 60 proven. 98 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-07-21 22:19:34,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:34,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:34,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:34,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:34,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:35,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:35,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 62 proven. 100 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2020-07-21 22:19:35,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628866534] [2020-07-21 22:19:35,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:35,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 22:19:35,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51959634] [2020-07-21 22:19:35,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:19:35,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:35,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:19:35,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:19:35,132 INFO L87 Difference]: Start difference. First operand 107 states and 226 transitions. Second operand 13 states. [2020-07-21 22:19:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:35,346 INFO L93 Difference]: Finished difference Result 156 states and 384 transitions. [2020-07-21 22:19:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:19:35,346 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-07-21 22:19:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:35,349 INFO L225 Difference]: With dead ends: 156 [2020-07-21 22:19:35,349 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 22:19:35,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 253 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:19:35,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 22:19:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2020-07-21 22:19:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 22:19:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 226 transitions. [2020-07-21 22:19:35,366 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 226 transitions. Word has length 137 [2020-07-21 22:19:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:35,366 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 226 transitions. [2020-07-21 22:19:35,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:19:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 226 transitions. [2020-07-21 22:19:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-21 22:19:35,370 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:35,370 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:35,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:35,585 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:35,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1521075862, now seen corresponding path program 8 times [2020-07-21 22:19:35,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:35,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771775475] [2020-07-21 22:19:35,586 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:35,696 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:19:35,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:35,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:19:35,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 18 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-07-21 22:19:35,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:36,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:36,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:36,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:36,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:36,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:36,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:36,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 24 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-21 22:19:36,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771775475] [2020-07-21 22:19:36,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:36,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 22:19:36,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398503122] [2020-07-21 22:19:36,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:19:36,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:36,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:19:36,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:19:36,343 INFO L87 Difference]: Start difference. First operand 107 states and 226 transitions. Second operand 13 states. [2020-07-21 22:19:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:36,556 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2020-07-21 22:19:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:19:36,557 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 110 [2020-07-21 22:19:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:36,560 INFO L225 Difference]: With dead ends: 138 [2020-07-21 22:19:36,560 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 22:19:36,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 199 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:19:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 22:19:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2020-07-21 22:19:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-21 22:19:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 257 transitions. [2020-07-21 22:19:36,581 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 257 transitions. Word has length 110 [2020-07-21 22:19:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:36,581 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 257 transitions. [2020-07-21 22:19:36,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:19:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 257 transitions. [2020-07-21 22:19:36,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:19:36,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:36,586 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:36,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:36,799 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:36,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:36,799 INFO L82 PathProgramCache]: Analyzing trace with hash 989968015, now seen corresponding path program 9 times [2020-07-21 22:19:36,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:36,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747678239] [2020-07-21 22:19:36,800 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:36,900 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:19:36,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 22:19:36,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 112 proven. 26 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-21 22:19:36,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:37,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:37,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:37,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:37,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:37,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 111 proven. 31 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 22:19:37,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747678239] [2020-07-21 22:19:37,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:37,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 22:19:37,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173657221] [2020-07-21 22:19:37,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:19:37,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:19:37,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:19:37,810 INFO L87 Difference]: Start difference. First operand 114 states and 257 transitions. Second operand 15 states. [2020-07-21 22:19:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:38,080 INFO L93 Difference]: Finished difference Result 147 states and 340 transitions. [2020-07-21 22:19:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:19:38,081 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 22:19:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:38,083 INFO L225 Difference]: With dead ends: 147 [2020-07-21 22:19:38,083 INFO L226 Difference]: Without dead ends: 143 [2020-07-21 22:19:38,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:19:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-21 22:19:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 102. [2020-07-21 22:19:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 22:19:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2020-07-21 22:19:38,098 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 121 [2020-07-21 22:19:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:38,099 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2020-07-21 22:19:38,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:19:38,099 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2020-07-21 22:19:38,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:19:38,103 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:38,103 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:38,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:38,317 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:38,318 INFO L82 PathProgramCache]: Analyzing trace with hash -77183713, now seen corresponding path program 10 times [2020-07-21 22:19:38,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:38,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369432280] [2020-07-21 22:19:38,319 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:38,423 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:19:38,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:38,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 22:19:38,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 87 proven. 22 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2020-07-21 22:19:38,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:38,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:38,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:38,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:39,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 86 proven. 24 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-07-21 22:19:39,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369432280] [2020-07-21 22:19:39,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:39,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 22:19:39,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295265940] [2020-07-21 22:19:39,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:19:39,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:39,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:19:39,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:19:39,157 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand 13 states. [2020-07-21 22:19:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:39,339 INFO L93 Difference]: Finished difference Result 128 states and 276 transitions. [2020-07-21 22:19:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:19:39,340 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-21 22:19:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:39,342 INFO L225 Difference]: With dead ends: 128 [2020-07-21 22:19:39,342 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 22:19:39,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 223 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:19:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 22:19:39,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2020-07-21 22:19:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 22:19:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 184 transitions. [2020-07-21 22:19:39,354 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 184 transitions. Word has length 121 [2020-07-21 22:19:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:39,354 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 184 transitions. [2020-07-21 22:19:39,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:19:39,354 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 184 transitions. [2020-07-21 22:19:39,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:19:39,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:39,357 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:39,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:39,570 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:39,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:39,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1853548191, now seen corresponding path program 11 times [2020-07-21 22:19:39,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:39,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627613798] [2020-07-21 22:19:39,571 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:39,655 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:39,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:39,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 22:19:39,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 67 proven. 71 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-21 22:19:39,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:40,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:40,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:40,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:40,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:40,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 22:19:40,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627613798] [2020-07-21 22:19:40,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:40,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 22:19:40,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651593239] [2020-07-21 22:19:40,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:19:40,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:19:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:19:40,472 INFO L87 Difference]: Start difference. First operand 94 states and 184 transitions. Second operand 15 states. [2020-07-21 22:19:40,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:40,735 INFO L93 Difference]: Finished difference Result 126 states and 280 transitions. [2020-07-21 22:19:40,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:19:40,738 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 22:19:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:40,740 INFO L225 Difference]: With dead ends: 126 [2020-07-21 22:19:40,740 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 22:19:40,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:19:40,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 22:19:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2020-07-21 22:19:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 22:19:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 147 transitions. [2020-07-21 22:19:40,751 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 147 transitions. Word has length 121 [2020-07-21 22:19:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:40,751 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 147 transitions. [2020-07-21 22:19:40,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:19:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 147 transitions. [2020-07-21 22:19:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-21 22:19:40,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:40,754 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:40,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:40,968 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:40,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:40,968 INFO L82 PathProgramCache]: Analyzing trace with hash 250703466, now seen corresponding path program 1 times [2020-07-21 22:19:40,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:40,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264174826] [2020-07-21 22:19:40,969 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:41,059 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:41,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:41,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:19:41,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-07-21 22:19:41,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:41,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:41,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:41,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:41,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:41,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:42,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:42,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:42,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 38 proven. 102 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-07-21 22:19:42,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264174826] [2020-07-21 22:19:42,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:42,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:19:42,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534661395] [2020-07-21 22:19:42,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:19:42,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:42,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:19:42,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:19:42,063 INFO L87 Difference]: Start difference. First operand 81 states and 147 transitions. Second operand 15 states. [2020-07-21 22:19:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:42,317 INFO L93 Difference]: Finished difference Result 124 states and 266 transitions. [2020-07-21 22:19:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:19:42,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 110 [2020-07-21 22:19:42,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:42,320 INFO L225 Difference]: With dead ends: 124 [2020-07-21 22:19:42,320 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 22:19:42,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 195 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:19:42,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 22:19:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-07-21 22:19:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 22:19:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-07-21 22:19:42,331 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 110 [2020-07-21 22:19:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:42,331 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-07-21 22:19:42,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:19:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-07-21 22:19:42,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:19:42,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:42,333 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:42,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:42,547 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:42,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:42,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1905629551, now seen corresponding path program 12 times [2020-07-21 22:19:42,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:42,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985933538] [2020-07-21 22:19:42,549 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:42,653 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:19:42,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:42,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:19:42,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 50 proven. 107 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-21 22:19:42,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:43,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:43,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:43,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:43,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:43,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:43,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:43,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 48 proven. 117 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-07-21 22:19:43,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985933538] [2020-07-21 22:19:43,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:43,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 22:19:43,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709610990] [2020-07-21 22:19:43,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:19:43,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:43,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:19:43,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:19:43,902 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 17 states. [2020-07-21 22:19:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:44,255 INFO L93 Difference]: Finished difference Result 129 states and 200 transitions. [2020-07-21 22:19:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:19:44,256 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2020-07-21 22:19:44,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:44,257 INFO L225 Difference]: With dead ends: 129 [2020-07-21 22:19:44,257 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 22:19:44,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 215 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:19:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 22:19:44,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-21 22:19:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 22:19:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-21 22:19:44,266 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 121 [2020-07-21 22:19:44,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:44,266 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-21 22:19:44,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:19:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-21 22:19:44,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:19:44,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:44,268 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:44,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:44,482 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:44,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1847656481, now seen corresponding path program 13 times [2020-07-21 22:19:44,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:44,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219852187] [2020-07-21 22:19:44,484 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:44,589 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:44,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:44,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 22:19:44,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 52 proven. 86 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-21 22:19:44,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:45,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:45,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:45,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:45,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:45,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:45,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 53 proven. 89 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 22:19:45,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219852187] [2020-07-21 22:19:45,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:45,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 22:19:45,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252818375] [2020-07-21 22:19:45,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:19:45,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:45,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:19:45,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:19:45,522 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 15 states. [2020-07-21 22:19:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:45,720 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-07-21 22:19:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:19:45,721 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 22:19:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:45,721 INFO L225 Difference]: With dead ends: 61 [2020-07-21 22:19:45,721 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:19:45,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:19:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:19:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:19:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:19:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:19:45,724 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2020-07-21 22:19:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:45,724 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:19:45,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:19:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:19:45,730 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:19:45,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:45,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:19:47,718 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 35 [2020-07-21 22:19:48,647 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 21 [2020-07-21 22:19:48,965 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-07-21 22:19:48,970 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 22:19:48,970 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:19:48,970 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:19:48,970 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:19:48,970 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:19:48,970 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:19:48,970 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 22:19:48,971 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 22:19:48,971 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 22:19:48,971 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 22:19:48,971 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 22:19:48,971 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 22:19:48,971 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-07-21 22:19:48,971 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 22:19:48,971 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 22:19:48,972 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 22:19:48,972 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 22:19:48,972 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 22:19:48,973 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (or (<= 5 |fibo2_#in~n|) (and (<= 4 |fibo2_#in~n|) (= 2 |fibo2_#t~ret2|)) (and (= 1 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 3))) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 22:19:48,973 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 22:19:48,973 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 22:19:48,973 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 22:19:48,973 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 22:19:48,973 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 22:19:48,974 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 22:19:48,974 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-21 22:19:48,974 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 22:19:48,974 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 4 |fibo1_#in~n|)) (and (<= 2 |fibo1_#in~n|) .cse0 (= 1 |fibo1_#t~ret0|)))) (let ((.cse1 (<= |fibo1_#in~n| fibo1_~n))) (or (and (<= 6 |fibo1_#in~n|) .cse1) (and (= 3 |fibo1_#t~ret0|) .cse1) (and (<= |fibo1_#in~n| 4) .cse1)))) [2020-07-21 22:19:48,974 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 22:19:48,974 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 22:19:48,974 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 22:19:48,974 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 22:19:48,975 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 22:19:48,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:19:48 BoogieIcfgContainer [2020-07-21 22:19:48,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:19:48,984 INFO L168 Benchmark]: Toolchain (without parser) took 33776.63 ms. Allocated memory was 138.9 MB in the beginning and 468.2 MB in the end (delta: 329.3 MB). Free memory was 103.8 MB in the beginning and 375.9 MB in the end (delta: -272.1 MB). Peak memory consumption was 348.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:19:48,985 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 22:19:48,985 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.36 ms. Allocated memory is still 138.9 MB. Free memory was 103.4 MB in the beginning and 93.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 22:19:48,986 INFO L168 Benchmark]: Boogie Preprocessor took 33.00 ms. Allocated memory is still 138.9 MB. Free memory was 93.8 MB in the beginning and 92.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:19:48,986 INFO L168 Benchmark]: RCFGBuilder took 363.75 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.5 MB in the beginning and 170.1 MB in the end (delta: -77.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:19:48,987 INFO L168 Benchmark]: TraceAbstraction took 33129.79 ms. Allocated memory was 203.4 MB in the beginning and 468.2 MB in the end (delta: 264.8 MB). Free memory was 169.4 MB in the beginning and 375.9 MB in the end (delta: -206.4 MB). Peak memory consumption was 349.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:19:48,989 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.36 ms. Allocated memory is still 138.9 MB. Free memory was 103.4 MB in the beginning and 93.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.00 ms. Allocated memory is still 138.9 MB. Free memory was 93.8 MB in the beginning and 92.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 363.75 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.5 MB in the beginning and 170.1 MB in the end (delta: -77.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 33129.79 ms. Allocated memory was 203.4 MB in the beginning and 468.2 MB in the end (delta: 264.8 MB). Free memory was 169.4 MB in the beginning and 375.9 MB in the end (delta: -206.4 MB). Peak memory consumption was 349.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 30.0s, OverallIterations: 25, TraceHistogramMax: 11, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 707 SDtfs, 791 SDslu, 4724 SDs, 0 SdLazy, 3888 SolverSat, 554 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4445 GetRequests, 3901 SyntacticMatches, 181 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 340 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 134 PreInvPairs, 1204 NumberOfFragments, 102 HoareAnnotationTreeSize, 134 FomulaSimplifications, 3894644 FormulaSimplificationTreeSizeReduction, 2.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 2083 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 16.8s InterpolantComputationTime, 2197 NumberOfCodeBlocks, 1420 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 4319 ConstructedInterpolants, 0 QuantifiedInterpolants, 827309 SizeOfPredicates, 108 NumberOfNonLiveVariables, 3172 ConjunctsInSsa, 284 ConjunctsInUnsatCore, 48 InterpolantComputations, 2 PerfectInterpolantSequences, 8076/10394 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...