/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 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 [2020-07-20 13:34:34,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:34:34,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:34:34,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:34:34,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:34:34,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:34:34,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:34:34,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:34:34,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:34:34,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:34:34,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:34:34,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:34:34,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:34:34,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:34:34,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:34:34,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:34:34,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:34:34,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:34:34,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:34:35,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:34:35,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:34:35,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:34:35,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:34:35,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:34:35,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:34:35,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:34:35,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:34:35,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:34:35,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:34:35,054 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:34:35,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:34:35,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:34:35,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:34:35,058 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:34:35,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:34:35,058 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:34:35,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:34:35,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:34:35,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:34:35,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:34:35,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:34:35,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:34:35,063 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:34:35,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:34:35,063 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:34:35,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:34:35,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:34:35,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:34:35,064 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:34:35,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:34:35,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:34:35,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:34:35,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:34:35,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:34:35,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:34:35,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:35,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:34:35,066 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:34:35,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:34:35,491 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:34:35,530 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:34:35,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:34:35,540 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:34:35,541 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:34:35,543 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-20 13:34:35,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24c00e12b/f17d992765214e969f7e659fbe5b8443/FLAG799cd7d7b [2020-07-20 13:34:36,551 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:34:36,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-20 13:34:36,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24c00e12b/f17d992765214e969f7e659fbe5b8443/FLAG799cd7d7b [2020-07-20 13:34:36,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24c00e12b/f17d992765214e969f7e659fbe5b8443 [2020-07-20 13:34:36,616 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:34:36,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:34:36,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:34:36,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:34:36,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:34:36,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:34:36" (1/1) ... [2020-07-20 13:34:36,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd18d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:36, skipping insertion in model container [2020-07-20 13:34:36,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:34:36" (1/1) ... [2020-07-20 13:34:36,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:34:36,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:34:37,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:34:37,029 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:34:37,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:34:37,094 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:34:37,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:37 WrapperNode [2020-07-20 13:34:37,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:34:37,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:34:37,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:34:37,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:34:37,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:37" (1/1) ... [2020-07-20 13:34:37,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:37" (1/1) ... [2020-07-20 13:34:37,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:37" (1/1) ... [2020-07-20 13:34:37,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:37" (1/1) ... [2020-07-20 13:34:37,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:37" (1/1) ... [2020-07-20 13:34:37,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:37" (1/1) ... [2020-07-20 13:34:37,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:37" (1/1) ... [2020-07-20 13:34:37,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:34:37,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:34:37,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:34:37,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:34:37,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:34:37,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:34:37,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:34:37,505 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 13:34:37,505 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 13:34:37,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:34:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:34:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:34:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 13:34:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 13:34:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:34:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:34:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:34:37,807 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:34:37,807 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:34:37,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:34:37 BoogieIcfgContainer [2020-07-20 13:34:37,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:34:37,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:34:37,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:34:37,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:34:37,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:34:36" (1/3) ... [2020-07-20 13:34:37,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3661ef75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:34:37, skipping insertion in model container [2020-07-20 13:34:37,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:37" (2/3) ... [2020-07-20 13:34:37,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3661ef75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:34:37, skipping insertion in model container [2020-07-20 13:34:37,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:34:37" (3/3) ... [2020-07-20 13:34:37,840 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-07-20 13:34:37,858 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:34:37,877 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:34:37,901 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:34:37,961 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:34:37,962 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:34:37,962 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:34:37,962 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:34:37,963 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:34:37,963 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:34:37,963 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:34:37,963 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:34:37,990 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 13:34:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 13:34:38,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:38,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:38,003 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:38,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:38,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 13:34:38,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:38,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666331243] [2020-07-20 13:34:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:38,122 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:38,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:38,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:34:38,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:34:38,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:34:38,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666331243] [2020-07-20 13:34:38,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:34:38,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:34:38,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211385857] [2020-07-20 13:34:38,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:34:38,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:38,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:34:38,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:34:38,460 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 13:34:38,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:38,649 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 13:34:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:34:38,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 13:34:38,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:38,669 INFO L225 Difference]: With dead ends: 44 [2020-07-20 13:34:38,670 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 13:34:38,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:34:38,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 13:34:38,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 13:34:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:34:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 13:34:38,751 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 13:34:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:38,752 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 13:34:38,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:34:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 13:34:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:34:38,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:38,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:38,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:38,972 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:38,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 13:34:38,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:38,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824664517] [2020-07-20 13:34:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:39,013 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:39,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:39,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:34:39,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:34:39,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:34:39,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824664517] [2020-07-20 13:34:39,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:34:39,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:34:39,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140496548] [2020-07-20 13:34:39,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:34:39,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:39,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:34:39,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:34:39,109 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 13:34:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:39,280 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 13:34:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:34:39,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 13:34:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:39,283 INFO L225 Difference]: With dead ends: 36 [2020-07-20 13:34:39,284 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 13:34:39,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:34:39,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 13:34:39,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 13:34:39,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:34:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 13:34:39,301 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 13:34:39,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:39,301 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 13:34:39,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:34:39,302 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 13:34:39,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 13:34:39,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:39,304 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] [2020-07-20 13:34:39,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:39,519 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:39,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 13:34:39,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:39,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163740015] [2020-07-20 13:34:39,522 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:39,589 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:39,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:39,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:34:39,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:34:39,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:39,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:39,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:34:40,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163740015] [2020-07-20 13:34:40,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:40,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 13:34:40,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223886227] [2020-07-20 13:34:40,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:34:40,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:40,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:34:40,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:34:40,067 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 13:34:40,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:40,295 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 13:34:40,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:34:40,296 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 13:34:40,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:40,299 INFO L225 Difference]: With dead ends: 41 [2020-07-20 13:34:40,300 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 13:34:40,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:34:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 13:34:40,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 13:34:40,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 13:34:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 13:34:40,314 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 13:34:40,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:40,315 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 13:34:40,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:34:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 13:34:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:34:40,317 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:40,318 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] [2020-07-20 13:34:40,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:40,533 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:40,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:40,534 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 13:34:40,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:40,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541276716] [2020-07-20 13:34:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:40,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:40,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:40,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:34:40,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:34:40,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:40,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:40,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:34:41,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541276716] [2020-07-20 13:34:41,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:41,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 13:34:41,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324715355] [2020-07-20 13:34:41,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:34:41,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:41,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:34:41,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:34:41,031 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 13:34:41,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:41,269 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 13:34:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:34:41,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 13:34:41,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:41,280 INFO L225 Difference]: With dead ends: 46 [2020-07-20 13:34:41,280 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 13:34:41,284 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 [2020-07-20 13:34:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 13:34:41,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 13:34:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 13:34:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 13:34:41,301 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 13:34:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:41,302 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 13:34:41,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:34:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 13:34:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 13:34:41,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:41,305 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] [2020-07-20 13:34:41,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:41,508 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:41,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:41,509 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 13:34:41,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:41,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652092121] [2020-07-20 13:34:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:41,556 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:41,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:41,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:34:41,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 13:34:41,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:42,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:42,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:42,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:34:42,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652092121] [2020-07-20 13:34:42,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:42,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 13:34:42,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690591084] [2020-07-20 13:34:42,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 13:34:42,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:42,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 13:34:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:34:42,168 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 13:34:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:42,408 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 13:34:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:34:42,408 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 13:34:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:42,411 INFO L225 Difference]: With dead ends: 51 [2020-07-20 13:34:42,411 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 13:34:42,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:34:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 13:34:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 13:34:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 13:34:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 13:34:42,426 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 13:34:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:42,426 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 13:34:42,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 13:34:42,427 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 13:34:42,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 13:34:42,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:42,429 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] [2020-07-20 13:34:42,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:42,636 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:42,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:42,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 13:34:42,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:42,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894622106] [2020-07-20 13:34:42,639 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:42,684 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:42,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:42,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:34:42,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:34:42,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:43,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:43,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:43,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:34:43,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894622106] [2020-07-20 13:34:43,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:43,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 13:34:43,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518639067] [2020-07-20 13:34:43,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 13:34:43,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:43,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 13:34:43,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:34:43,207 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-20 13:34:43,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:43,477 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 13:34:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:34:43,478 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 13:34:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:43,484 INFO L225 Difference]: With dead ends: 56 [2020-07-20 13:34:43,484 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 13:34:43,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:34:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 13:34:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 13:34:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 13:34:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 13:34:43,523 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 13:34:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:43,525 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 13:34:43,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 13:34:43,526 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 13:34:43,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 13:34:43,528 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:43,529 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] [2020-07-20 13:34:43,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:43,744 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:43,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:43,745 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 13:34:43,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:43,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628252808] [2020-07-20 13:34:43,747 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:43,806 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:43,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:43,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:34:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 13:34:43,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:44,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:44,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:44,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:44,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 13:34:44,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628252808] [2020-07-20 13:34:44,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:44,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 13:34:44,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455645984] [2020-07-20 13:34:44,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 13:34:44,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:44,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 13:34:44,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:34:44,623 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-20 13:34:44,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:44,933 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 13:34:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:34:44,934 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-20 13:34:44,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:44,936 INFO L225 Difference]: With dead ends: 61 [2020-07-20 13:34:44,937 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 13:34:44,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:34:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 13:34:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 13:34:44,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 13:34:44,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 13:34:44,953 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 13:34:44,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:44,953 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 13:34:44,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 13:34:44,954 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 13:34:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 13:34:44,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:44,957 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] [2020-07-20 13:34:45,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:45,166 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:45,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:45,167 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 13:34:45,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:45,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889581380] [2020-07-20 13:34:45,168 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:45,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:45,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:45,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:34:45,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 13:34:45,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:45,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:45,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:45,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:45,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:45,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 13:34:46,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889581380] [2020-07-20 13:34:46,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:46,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:34:46,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785051621] [2020-07-20 13:34:46,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:34:46,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:46,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:34:46,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:34:46,034 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 13 states. [2020-07-20 13:34:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:46,317 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-20 13:34:46,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:34:46,318 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-07-20 13:34:46,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:46,321 INFO L225 Difference]: With dead ends: 66 [2020-07-20 13:34:46,322 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 13:34:46,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:34:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 13:34:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-20 13:34:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 13:34:46,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 13:34:46,339 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-20 13:34:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:46,340 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 13:34:46,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:34:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 13:34:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 13:34:46,344 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:46,344 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] [2020-07-20 13:34:46,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:46,559 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:46,560 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-20 13:34:46,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:46,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043126647] [2020-07-20 13:34:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:46,634 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:46,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:46,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:34:46,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 13:34:46,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:47,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 13:34:47,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043126647] [2020-07-20 13:34:47,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:47,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 13:34:47,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420209990] [2020-07-20 13:34:47,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:34:47,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:47,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:34:47,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:34:47,895 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 15 states. [2020-07-20 13:34:48,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:48,252 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-20 13:34:48,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:34:48,253 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-07-20 13:34:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:48,256 INFO L225 Difference]: With dead ends: 71 [2020-07-20 13:34:48,256 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 13:34:48,258 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 [2020-07-20 13:34:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 13:34:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 13:34:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 13:34:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 13:34:48,275 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-20 13:34:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:48,275 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 13:34:48,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:34:48,276 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 13:34:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 13:34:48,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:48,279 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] [2020-07-20 13:34:48,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:48,494 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:48,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:48,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-20 13:34:48,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:48,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174442142] [2020-07-20 13:34:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:48,619 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:48,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:48,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:34:48,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 79 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-07-20 13:34:48,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:49,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:49,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:49,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:49,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 83 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-07-20 13:34:49,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174442142] [2020-07-20 13:34:49,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:49,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:34:49,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50090937] [2020-07-20 13:34:49,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:34:49,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:49,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:34:49,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:34:49,524 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 13 states. [2020-07-20 13:34:49,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:49,773 INFO L93 Difference]: Finished difference Result 84 states and 164 transitions. [2020-07-20 13:34:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:34:49,779 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-07-20 13:34:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:49,782 INFO L225 Difference]: With dead ends: 84 [2020-07-20 13:34:49,783 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 13:34:49,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 196 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:34:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 13:34:49,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2020-07-20 13:34:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 13:34:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-20 13:34:49,809 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 108 [2020-07-20 13:34:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:49,811 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-20 13:34:49,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:34:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-20 13:34:49,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 13:34:49,814 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:49,814 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] [2020-07-20 13:34:50,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:50,030 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:50,031 INFO L82 PathProgramCache]: Analyzing trace with hash -60364660, now seen corresponding path program 1 times [2020-07-20 13:34:50,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:50,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179682918] [2020-07-20 13:34:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:50,107 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:50,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:50,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:34:50,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 56 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-07-20 13:34:50,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:50,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:50,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:50,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-07-20 13:34:50,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179682918] [2020-07-20 13:34:50,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:50,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 13:34:50,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089140528] [2020-07-20 13:34:50,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:34:50,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:50,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:34:50,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:34:50,742 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 11 states. [2020-07-20 13:34:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:50,926 INFO L93 Difference]: Finished difference Result 79 states and 145 transitions. [2020-07-20 13:34:50,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:34:50,928 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2020-07-20 13:34:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:50,930 INFO L225 Difference]: With dead ends: 79 [2020-07-20 13:34:50,931 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 13:34:50,932 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 [2020-07-20 13:34:50,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 13:34:50,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-07-20 13:34:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 13:34:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 85 transitions. [2020-07-20 13:34:50,948 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 85 transitions. Word has length 109 [2020-07-20 13:34:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:50,949 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 85 transitions. [2020-07-20 13:34:50,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:34:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 85 transitions. [2020-07-20 13:34:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 13:34:50,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:50,952 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] [2020-07-20 13:34:51,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:51,168 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:51,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:51,168 INFO L82 PathProgramCache]: Analyzing trace with hash 836558126, now seen corresponding path program 1 times [2020-07-20 13:34:51,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:51,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297675600] [2020-07-20 13:34:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:51,266 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:51,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:51,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:34:51,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 103 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2020-07-20 13:34:51,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:52,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:52,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:52,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:52,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:52,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:52,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:52,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 113 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-07-20 13:34:52,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297675600] [2020-07-20 13:34:52,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:52,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 13:34:52,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330685568] [2020-07-20 13:34:52,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:34:52,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:52,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:34:52,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:34:52,517 INFO L87 Difference]: Start difference. First operand 54 states and 85 transitions. Second operand 15 states. [2020-07-20 13:34:52,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:52,868 INFO L93 Difference]: Finished difference Result 94 states and 199 transitions. [2020-07-20 13:34:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:34:52,870 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-07-20 13:34:52,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:52,872 INFO L225 Difference]: With dead ends: 94 [2020-07-20 13:34:52,872 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 13:34:52,882 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 [2020-07-20 13:34:52,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 13:34:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-07-20 13:34:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 13:34:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 95 transitions. [2020-07-20 13:34:52,925 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 95 transitions. Word has length 135 [2020-07-20 13:34:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:52,926 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 95 transitions. [2020-07-20 13:34:52,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:34:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 95 transitions. [2020-07-20 13:34:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 13:34:52,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:52,936 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] [2020-07-20 13:34:53,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:53,150 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:53,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1608635723, now seen corresponding path program 2 times [2020-07-20 13:34:53,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:53,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572308734] [2020-07-20 13:34:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:53,247 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:53,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:53,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:34:53,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 78 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-07-20 13:34:53,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:53,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:53,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:53,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:54,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:54,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 82 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-07-20 13:34:54,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572308734] [2020-07-20 13:34:54,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:54,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:34:54,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564941548] [2020-07-20 13:34:54,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:34:54,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:54,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:34:54,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:34:54,101 INFO L87 Difference]: Start difference. First operand 62 states and 95 transitions. Second operand 13 states. [2020-07-20 13:34:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:54,357 INFO L93 Difference]: Finished difference Result 92 states and 161 transitions. [2020-07-20 13:34:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:34:54,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-20 13:34:54,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:54,362 INFO L225 Difference]: With dead ends: 92 [2020-07-20 13:34:54,362 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 13:34:54,364 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 [2020-07-20 13:34:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 13:34:54,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-07-20 13:34:54,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 13:34:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 103 transitions. [2020-07-20 13:34:54,379 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 103 transitions. Word has length 121 [2020-07-20 13:34:54,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:54,380 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 103 transitions. [2020-07-20 13:34:54,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:34:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 103 transitions. [2020-07-20 13:34:54,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-20 13:34:54,383 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:54,383 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] [2020-07-20 13:34:54,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:54,598 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:54,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:54,598 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 3 times [2020-07-20 13:34:54,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:54,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878545279] [2020-07-20 13:34:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:54,690 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:34:54,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:54,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:34:54,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-20 13:34:54,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:55,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:55,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:55,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:55,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-07-20 13:34:55,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878545279] [2020-07-20 13:34:55,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:55,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 13:34:55,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713969684] [2020-07-20 13:34:55,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:34:55,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:55,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:34:55,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:34:55,268 INFO L87 Difference]: Start difference. First operand 65 states and 103 transitions. Second operand 11 states. [2020-07-20 13:34:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:55,459 INFO L93 Difference]: Finished difference Result 84 states and 140 transitions. [2020-07-20 13:34:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:34:55,460 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 95 [2020-07-20 13:34:55,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:55,462 INFO L225 Difference]: With dead ends: 84 [2020-07-20 13:34:55,462 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 13:34:55,463 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 [2020-07-20 13:34:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 13:34:55,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-07-20 13:34:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 13:34:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 122 transitions. [2020-07-20 13:34:55,476 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 122 transitions. Word has length 95 [2020-07-20 13:34:55,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:55,476 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 122 transitions. [2020-07-20 13:34:55,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:34:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 122 transitions. [2020-07-20 13:34:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 13:34:55,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:55,479 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] [2020-07-20 13:34:55,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:55,692 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash 594466134, now seen corresponding path program 4 times [2020-07-20 13:34:55,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:55,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368119360] [2020-07-20 13:34:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:55,787 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:34:55,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:55,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:34:55,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 83 proven. 24 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-07-20 13:34:55,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:56,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:56,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:56,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:56,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:56,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-20 13:34:56,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368119360] [2020-07-20 13:34:56,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:56,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:34:56,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809693844] [2020-07-20 13:34:56,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:34:56,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:56,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:34:56,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:34:56,623 INFO L87 Difference]: Start difference. First operand 72 states and 122 transitions. Second operand 13 states. [2020-07-20 13:34:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:56,861 INFO L93 Difference]: Finished difference Result 92 states and 158 transitions. [2020-07-20 13:34:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:34:56,862 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 107 [2020-07-20 13:34:56,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:56,865 INFO L225 Difference]: With dead ends: 92 [2020-07-20 13:34:56,865 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 13:34:56,867 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 [2020-07-20 13:34:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 13:34:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2020-07-20 13:34:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-20 13:34:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-20 13:34:56,881 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 107 [2020-07-20 13:34:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:56,882 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-20 13:34:56,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:34:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-20 13:34:56,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 13:34:56,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:56,885 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] [2020-07-20 13:34:57,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:57,102 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash 235412830, now seen corresponding path program 5 times [2020-07-20 13:34:57,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:57,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913215637] [2020-07-20 13:34:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:57,209 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:34:57,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:57,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:34:57,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 19 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-07-20 13:34:57,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:57,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:57,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:57,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:57,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-20 13:34:57,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913215637] [2020-07-20 13:34:57,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:57,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 13:34:57,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746135104] [2020-07-20 13:34:57,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:34:57,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:57,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:34:57,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:34:57,795 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 11 states. [2020-07-20 13:34:57,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:57,970 INFO L93 Difference]: Finished difference Result 91 states and 155 transitions. [2020-07-20 13:34:57,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:34:57,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-07-20 13:34:57,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:57,974 INFO L225 Difference]: With dead ends: 91 [2020-07-20 13:34:57,974 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 13:34:57,976 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 [2020-07-20 13:34:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 13:34:57,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-07-20 13:34:57,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-20 13:34:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-20 13:34:57,991 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 108 [2020-07-20 13:34:57,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:57,992 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-20 13:34:57,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:34:57,992 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-20 13:34:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 13:34:57,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:57,995 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] [2020-07-20 13:34:58,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:58,210 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:58,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 6 times [2020-07-20 13:34:58,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:58,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560993861] [2020-07-20 13:34:58,213 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 [2020-07-20 13:34:58,355 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:34:58,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:58,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 13:34:58,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-20 13:34:58,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-20 13:35:00,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560993861] [2020-07-20 13:35:00,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:00,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-20 13:35:00,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267261312] [2020-07-20 13:35:00,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 13:35:00,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:00,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 13:35:00,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-20 13:35:00,031 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 28 states. [2020-07-20 13:35:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:00,624 INFO L93 Difference]: Finished difference Result 148 states and 317 transitions. [2020-07-20 13:35:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 13:35:00,625 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-07-20 13:35:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:00,629 INFO L225 Difference]: With dead ends: 148 [2020-07-20 13:35:00,630 INFO L226 Difference]: Without dead ends: 144 [2020-07-20 13:35:00,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:35:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-20 13:35:00,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2020-07-20 13:35:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 13:35:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 226 transitions. [2020-07-20 13:35:00,658 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 226 transitions. Word has length 109 [2020-07-20 13:35:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:00,658 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 226 transitions. [2020-07-20 13:35:00,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 13:35:00,659 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 226 transitions. [2020-07-20 13:35:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-07-20 13:35:00,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:00,663 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] [2020-07-20 13:35:00,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:00,878 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:00,879 INFO L82 PathProgramCache]: Analyzing trace with hash -706406608, now seen corresponding path program 7 times [2020-07-20 13:35:00,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:00,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443675842] [2020-07-20 13:35:00,880 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 [2020-07-20 13:35:00,993 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:00,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:00,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:35:01,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 60 proven. 97 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-07-20 13:35:01,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:01,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 62 proven. 100 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2020-07-20 13:35:01,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443675842] [2020-07-20 13:35:01,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:01,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:35:01,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150837598] [2020-07-20 13:35:01,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:35:01,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:01,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:35:01,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:35:01,893 INFO L87 Difference]: Start difference. First operand 107 states and 226 transitions. Second operand 13 states. [2020-07-20 13:35:02,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:02,103 INFO L93 Difference]: Finished difference Result 156 states and 384 transitions. [2020-07-20 13:35:02,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:35:02,104 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-07-20 13:35:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:02,108 INFO L225 Difference]: With dead ends: 156 [2020-07-20 13:35:02,110 INFO L226 Difference]: Without dead ends: 116 [2020-07-20 13:35:02,111 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 [2020-07-20 13:35:02,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-20 13:35:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2020-07-20 13:35:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 13:35:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 226 transitions. [2020-07-20 13:35:02,125 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 226 transitions. Word has length 137 [2020-07-20 13:35:02,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:02,125 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 226 transitions. [2020-07-20 13:35:02,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:35:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 226 transitions. [2020-07-20 13:35:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-20 13:35:02,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:02,129 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] [2020-07-20 13:35:02,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:02,344 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:02,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:02,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1521075862, now seen corresponding path program 8 times [2020-07-20 13:35:02,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:02,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365839511] [2020-07-20 13:35:02,345 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 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 [2020-07-20 13:35:02,470 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:02,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:02,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:35:02,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 17 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 13:35:02,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:02,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:02,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:03,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:03,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:03,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:03,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:03,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 24 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-20 13:35:03,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365839511] [2020-07-20 13:35:03,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:03,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:35:03,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888058565] [2020-07-20 13:35:03,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:35:03,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:03,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:35:03,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:35:03,257 INFO L87 Difference]: Start difference. First operand 107 states and 226 transitions. Second operand 13 states. [2020-07-20 13:35:03,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:03,561 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2020-07-20 13:35:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:35:03,562 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 110 [2020-07-20 13:35:03,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:03,566 INFO L225 Difference]: With dead ends: 138 [2020-07-20 13:35:03,566 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 13:35:03,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 199 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:35:03,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 13:35:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2020-07-20 13:35:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-20 13:35:03,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 257 transitions. [2020-07-20 13:35:03,585 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 257 transitions. Word has length 110 [2020-07-20 13:35:03,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:03,586 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 257 transitions. [2020-07-20 13:35:03,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:35:03,586 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 257 transitions. [2020-07-20 13:35:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 13:35:03,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:03,591 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] [2020-07-20 13:35:03,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:03,806 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:03,806 INFO L82 PathProgramCache]: Analyzing trace with hash 989968015, now seen corresponding path program 9 times [2020-07-20 13:35:03,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:03,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321345067] [2020-07-20 13:35:03,807 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 [2020-07-20 13:35:03,906 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:03,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:03,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:35:03,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 112 proven. 26 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-20 13:35:03,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:04,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:04,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:04,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:04,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:04,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 111 proven. 31 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-20 13:35:04,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321345067] [2020-07-20 13:35:04,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:04,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-20 13:35:04,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413955164] [2020-07-20 13:35:04,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:04,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:04,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:04,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:04,858 INFO L87 Difference]: Start difference. First operand 114 states and 257 transitions. Second operand 15 states. [2020-07-20 13:35:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:05,096 INFO L93 Difference]: Finished difference Result 147 states and 340 transitions. [2020-07-20 13:35:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:05,097 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-20 13:35:05,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:05,100 INFO L225 Difference]: With dead ends: 147 [2020-07-20 13:35:05,100 INFO L226 Difference]: Without dead ends: 143 [2020-07-20 13:35:05,102 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 [2020-07-20 13:35:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-20 13:35:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 102. [2020-07-20 13:35:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-20 13:35:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2020-07-20 13:35:05,117 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 121 [2020-07-20 13:35:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:05,118 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2020-07-20 13:35:05,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2020-07-20 13:35:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 13:35:05,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:05,122 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] [2020-07-20 13:35:05,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:05,338 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:05,339 INFO L82 PathProgramCache]: Analyzing trace with hash -77183713, now seen corresponding path program 10 times [2020-07-20 13:35:05,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:05,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236995089] [2020-07-20 13:35:05,340 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 [2020-07-20 13:35:05,443 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:05,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:05,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:35:05,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 87 proven. 22 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2020-07-20 13:35:05,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:05,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:05,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:05,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:05,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 86 proven. 24 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-07-20 13:35:06,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236995089] [2020-07-20 13:35:06,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:06,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-20 13:35:06,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151123230] [2020-07-20 13:35:06,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:35:06,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:06,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:35:06,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:35:06,034 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand 13 states. [2020-07-20 13:35:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:06,229 INFO L93 Difference]: Finished difference Result 128 states and 276 transitions. [2020-07-20 13:35:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:35:06,230 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-20 13:35:06,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:06,232 INFO L225 Difference]: With dead ends: 128 [2020-07-20 13:35:06,233 INFO L226 Difference]: Without dead ends: 124 [2020-07-20 13:35:06,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 223 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:35:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-20 13:35:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2020-07-20 13:35:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-20 13:35:06,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 184 transitions. [2020-07-20 13:35:06,249 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 184 transitions. Word has length 121 [2020-07-20 13:35:06,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:06,250 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 184 transitions. [2020-07-20 13:35:06,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:35:06,251 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 184 transitions. [2020-07-20 13:35:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 13:35:06,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:06,255 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] [2020-07-20 13:35:06,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:06,469 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:06,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1853548191, now seen corresponding path program 11 times [2020-07-20 13:35:06,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:06,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36548801] [2020-07-20 13:35:06,471 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 [2020-07-20 13:35:06,567 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:06,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:06,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:35:06,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 67 proven. 71 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-20 13:35:06,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:07,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:07,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:07,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:07,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:07,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-20 13:35:07,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36548801] [2020-07-20 13:35:07,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:07,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-20 13:35:07,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510783653] [2020-07-20 13:35:07,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:07,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:07,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:07,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:07,412 INFO L87 Difference]: Start difference. First operand 94 states and 184 transitions. Second operand 15 states. [2020-07-20 13:35:07,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:07,656 INFO L93 Difference]: Finished difference Result 126 states and 280 transitions. [2020-07-20 13:35:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:07,659 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-20 13:35:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:07,662 INFO L225 Difference]: With dead ends: 126 [2020-07-20 13:35:07,662 INFO L226 Difference]: Without dead ends: 94 [2020-07-20 13:35:07,663 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 [2020-07-20 13:35:07,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-20 13:35:07,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2020-07-20 13:35:07,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 13:35:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 147 transitions. [2020-07-20 13:35:07,672 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 147 transitions. Word has length 121 [2020-07-20 13:35:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:07,672 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 147 transitions. [2020-07-20 13:35:07,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 147 transitions. [2020-07-20 13:35:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-20 13:35:07,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:07,675 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] [2020-07-20 13:35:07,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:07,888 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:07,889 INFO L82 PathProgramCache]: Analyzing trace with hash 250703466, now seen corresponding path program 1 times [2020-07-20 13:35:07,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:07,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3980941] [2020-07-20 13:35:07,890 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 [2020-07-20 13:35:07,997 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:07,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:07,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:35:08,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 36 proven. 94 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-07-20 13:35:08,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:08,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:08,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:08,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:08,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:08,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:08,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:08,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:08,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 38 proven. 102 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-07-20 13:35:09,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3980941] [2020-07-20 13:35:09,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:09,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 13:35:09,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203075728] [2020-07-20 13:35:09,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:09,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:09,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:09,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:09,019 INFO L87 Difference]: Start difference. First operand 81 states and 147 transitions. Second operand 15 states. [2020-07-20 13:35:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:09,265 INFO L93 Difference]: Finished difference Result 124 states and 266 transitions. [2020-07-20 13:35:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:09,266 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 110 [2020-07-20 13:35:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:09,269 INFO L225 Difference]: With dead ends: 124 [2020-07-20 13:35:09,270 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 13:35:09,272 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 [2020-07-20 13:35:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 13:35:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-07-20 13:35:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 13:35:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-07-20 13:35:09,281 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 110 [2020-07-20 13:35:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:09,282 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-07-20 13:35:09,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-07-20 13:35:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 13:35:09,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:09,301 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] [2020-07-20 13:35:09,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:09,515 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:09,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:09,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1905629551, now seen corresponding path program 12 times [2020-07-20 13:35:09,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:09,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778636858] [2020-07-20 13:35:09,516 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 [2020-07-20 13:35:09,627 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:09,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:09,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:35:09,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 50 proven. 107 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-20 13:35:09,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:10,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:10,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:10,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:10,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:10,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:10,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:10,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 48 proven. 117 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-07-20 13:35:10,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778636858] [2020-07-20 13:35:10,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:10,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 13:35:10,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609415624] [2020-07-20 13:35:10,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:35:10,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:10,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:35:10,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:35:10,904 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 17 states. [2020-07-20 13:35:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:11,212 INFO L93 Difference]: Finished difference Result 129 states and 200 transitions. [2020-07-20 13:35:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:11,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2020-07-20 13:35:11,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:11,214 INFO L225 Difference]: With dead ends: 129 [2020-07-20 13:35:11,215 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 13:35:11,217 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 [2020-07-20 13:35:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 13:35:11,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-20 13:35:11,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 13:35:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-20 13:35:11,224 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 121 [2020-07-20 13:35:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:11,224 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-20 13:35:11,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:35:11,225 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-20 13:35:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 13:35:11,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:11,227 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] [2020-07-20 13:35:11,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:11,442 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:11,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1847656481, now seen corresponding path program 13 times [2020-07-20 13:35:11,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:11,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403005870] [2020-07-20 13:35:11,443 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 [2020-07-20 13:35:11,573 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:11,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:11,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:35:11,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 52 proven. 86 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-20 13:35:11,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:12,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:12,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:12,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:12,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:12,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:12,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 53 proven. 89 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-20 13:35:12,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403005870] [2020-07-20 13:35:12,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:12,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-20 13:35:12,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910377038] [2020-07-20 13:35:12,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:12,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:12,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:12,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:12,483 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 15 states. [2020-07-20 13:35:12,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:12,658 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-07-20 13:35:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:12,659 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-20 13:35:12,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:12,659 INFO L225 Difference]: With dead ends: 61 [2020-07-20 13:35:12,659 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:35:12,660 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 [2020-07-20 13:35:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:35:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:35:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:35:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:35:12,661 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2020-07-20 13:35:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:12,666 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:35:12,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:12,667 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:35:12,667 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:35:12,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:12,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:35:13,213 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2020-07-20 13:35:15,009 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 43 [2020-07-20 13:35:15,587 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 21 [2020-07-20 13:35:15,885 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-07-20 13:35:15,890 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:35:15,890 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:35:15,890 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:35:15,890 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:35:15,890 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:35:15,890 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:35:15,890 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-20 13:35:15,891 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-20 13:35:15,891 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-20 13:35:15,891 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-20 13:35:15,891 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-20 13:35:15,891 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-20 13:35:15,891 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-07-20 13:35:15,891 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-20 13:35:15,891 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-20 13:35:15,892 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-20 13:35:15,892 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|)) [2020-07-20 13:35:15,892 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-20 13:35:15,892 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|)) [2020-07-20 13:35:15,892 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-20 13:35:15,892 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-20 13:35:15,892 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-20 13:35:15,893 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-20 13:35:15,893 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-20 13:35:15,893 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-20 13:35:15,893 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)) [2020-07-20 13:35:15,893 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-20 13:35:15,893 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)))) [2020-07-20 13:35:15,893 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-20 13:35:15,894 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-20 13:35:15,894 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-20 13:35:15,894 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-20 13:35:15,894 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-20 13:35:15,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:35:15 BoogieIcfgContainer [2020-07-20 13:35:15,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:35:15,903 INFO L168 Benchmark]: Toolchain (without parser) took 39284.36 ms. Allocated memory was 141.0 MB in the beginning and 492.3 MB in the end (delta: 351.3 MB). Free memory was 98.3 MB in the beginning and 117.7 MB in the end (delta: -19.5 MB). Peak memory consumption was 350.2 MB. Max. memory is 7.1 GB. [2020-07-20 13:35:15,903 INFO L168 Benchmark]: CDTParser took 1.31 ms. Allocated memory is still 141.0 MB. Free memory is still 116.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 13:35:15,904 INFO L168 Benchmark]: CACSL2BoogieTranslator took 473.80 ms. Allocated memory is still 141.0 MB. Free memory was 98.3 MB in the beginning and 88.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:35:15,904 INFO L168 Benchmark]: Boogie Preprocessor took 250.79 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 88.7 MB in the beginning and 180.6 MB in the end (delta: -91.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-20 13:35:15,904 INFO L168 Benchmark]: RCFGBuilder took 469.98 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 167.3 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-07-20 13:35:15,905 INFO L168 Benchmark]: TraceAbstraction took 38078.13 ms. Allocated memory was 202.4 MB in the beginning and 492.3 MB in the end (delta: 289.9 MB). Free memory was 167.3 MB in the beginning and 117.7 MB in the end (delta: 49.6 MB). Peak memory consumption was 357.8 MB. Max. memory is 7.1 GB. [2020-07-20 13:35:15,907 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.31 ms. Allocated memory is still 141.0 MB. Free memory is still 116.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 473.80 ms. Allocated memory is still 141.0 MB. Free memory was 98.3 MB in the beginning and 88.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 250.79 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 88.7 MB in the beginning and 180.6 MB in the end (delta: -91.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 469.98 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 167.3 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 38078.13 ms. Allocated memory was 202.4 MB in the beginning and 492.3 MB in the end (delta: 289.9 MB). Free memory was 167.3 MB in the beginning and 117.7 MB in the end (delta: 49.6 MB). Peak memory consumption was 357.8 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: 34.9s, OverallIterations: 25, TraceHistogramMax: 11, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 707 SDtfs, 785 SDslu, 4765 SDs, 0 SdLazy, 3920 SolverSat, 554 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4445 GetRequests, 3901 SyntacticMatches, 181 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 5.5s 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: 0.4s 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: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 19.8s InterpolantComputationTime, 2197 NumberOfCodeBlocks, 1866 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 4319 ConstructedInterpolants, 0 QuantifiedInterpolants, 829261 SizeOfPredicates, 108 NumberOfNonLiveVariables, 4379 ConjunctsInSsa, 284 ConjunctsInUnsatCore, 48 InterpolantComputations, 2 PerfectInterpolantSequences, 8082/10394 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...