/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:37:04,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:37:04,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:37:04,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:37:04,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:37:04,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:37:04,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:37:04,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:37:04,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:37:04,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:37:04,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:37:04,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:37:04,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:37:04,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:37:04,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:37:04,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:37:04,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:37:04,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:37:04,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:37:04,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:37:04,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:37:04,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:37:04,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:37:04,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:37:04,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:37:04,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:37:04,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:37:04,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:37:04,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 19:37:04,566 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:37:04,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:37:04,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:37:04,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:37:04,571 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:37:04,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:37:04,572 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:37:04,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:37:04,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:37:04,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:37:04,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:37:04,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:37:04,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:37:04,574 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:37:04,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:37:04,575 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:37:04,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:37:04,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:37:04,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:37:04,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:37:04,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:37:04,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:37:04,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:37:04,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:37:04,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:37:04,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:37:04,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:04,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:37:04,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:37:04,580 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 -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 19:37:04,930 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:37:04,957 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:37:04,967 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:37:04,969 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:37:04,969 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:37:04,970 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-21 19:37:05,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05f32092/ba03f66f5a3e4295b470d7b9586a083d/FLAG05a589f11 [2020-07-21 19:37:05,699 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:37:05,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-21 19:37:05,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05f32092/ba03f66f5a3e4295b470d7b9586a083d/FLAG05a589f11 [2020-07-21 19:37:06,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05f32092/ba03f66f5a3e4295b470d7b9586a083d [2020-07-21 19:37:06,056 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:37:06,060 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:37:06,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:37:06,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:37:06,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:37:06,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:37:06" (1/1) ... [2020-07-21 19:37:06,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b391626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:37:06, skipping insertion in model container [2020-07-21 19:37:06,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:37:06" (1/1) ... [2020-07-21 19:37:06,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:37:06,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:37:06,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:37:06,372 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:37:06,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:37:06,413 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:37:06,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:37:06 WrapperNode [2020-07-21 19:37:06,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:37:06,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:37:06,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:37:06,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:37:06,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:37:06" (1/1) ... [2020-07-21 19:37:06,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:37:06" (1/1) ... [2020-07-21 19:37:06,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:37:06" (1/1) ... [2020-07-21 19:37:06,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:37:06" (1/1) ... [2020-07-21 19:37:06,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:37:06" (1/1) ... [2020-07-21 19:37:06,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:37:06" (1/1) ... [2020-07-21 19:37:06,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:37:06" (1/1) ... [2020-07-21 19:37:06,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:37:06,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:37:06,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:37:06,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:37:06,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:37:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:37:06,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:37:06,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:37:06,630 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 19:37:06,630 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 19:37:06,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:37:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:37:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:37:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 19:37:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 19:37:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:37:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:37:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:37:06,877 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:37:06,878 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:37:06,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:37:06 BoogieIcfgContainer [2020-07-21 19:37:06,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:37:06,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:37:06,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:37:06,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:37:06,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:37:06" (1/3) ... [2020-07-21 19:37:06,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42780535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:37:06, skipping insertion in model container [2020-07-21 19:37:06,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:37:06" (2/3) ... [2020-07-21 19:37:06,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42780535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:37:06, skipping insertion in model container [2020-07-21 19:37:06,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:37:06" (3/3) ... [2020-07-21 19:37:06,908 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-07-21 19:37:06,929 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:37:06,944 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:37:06,966 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:37:07,042 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:37:07,043 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:37:07,043 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:37:07,043 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:37:07,043 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:37:07,044 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:37:07,044 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:37:07,044 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:37:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 19:37:07,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:37:07,077 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:07,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:07,079 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:07,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:07,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 19:37:07,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:07,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139426155] [2020-07-21 19:37:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:07,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:37:07,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:07,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:37:07,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:37:07,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:37:07,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139426155] [2020-07-21 19:37:07,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:37:07,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:37:07,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891166132] [2020-07-21 19:37:07,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:37:07,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:07,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:37:07,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:37:07,339 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 19:37:07,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:07,488 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 19:37:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:37:07,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 19:37:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:07,506 INFO L225 Difference]: With dead ends: 44 [2020-07-21 19:37:07,506 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 19:37:07,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:37:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 19:37:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 19:37:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:37:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 19:37:07,577 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 19:37:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:07,578 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 19:37:07,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:37:07,578 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 19:37:07,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 19:37:07,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:07,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:07,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:07,798 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:07,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 19:37:07,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:07,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610468125] [2020-07-21 19:37:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:07,832 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:37:07,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:07,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:37:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:37:07,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:37:07,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610468125] [2020-07-21 19:37:07,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:37:07,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:37:07,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125295948] [2020-07-21 19:37:07,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:37:07,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:07,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:37:07,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:37:07,882 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 19:37:07,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:07,990 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 19:37:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:37:07,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 19:37:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:07,993 INFO L225 Difference]: With dead ends: 36 [2020-07-21 19:37:07,993 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 19:37:07,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:37:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 19:37:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 19:37:08,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:37:08,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 19:37:08,007 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 19:37:08,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:08,008 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 19:37:08,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:37:08,009 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 19:37:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 19:37:08,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:08,011 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:08,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:08,227 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:08,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 19:37:08,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:08,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869705304] [2020-07-21 19:37:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:08,273 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:08,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:08,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:37:08,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:37:08,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:08,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:08,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:37:08,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869705304] [2020-07-21 19:37:08,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:08,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 19:37:08,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86321289] [2020-07-21 19:37:08,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 19:37:08,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:08,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 19:37:08,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:37:08,694 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 19:37:08,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:08,850 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 19:37:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:37:08,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 19:37:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:08,853 INFO L225 Difference]: With dead ends: 41 [2020-07-21 19:37:08,853 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 19:37:08,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:37:08,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 19:37:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 19:37:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 19:37:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 19:37:08,866 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 19:37:08,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:08,867 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 19:37:08,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 19:37:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 19:37:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 19:37:08,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:08,869 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:09,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:09,081 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:09,083 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 19:37:09,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:09,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050843382] [2020-07-21 19:37:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:09,123 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:09,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:09,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:37:09,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:37:09,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:09,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:09,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:37:09,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050843382] [2020-07-21 19:37:09,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:09,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 19:37:09,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495747136] [2020-07-21 19:37:09,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 19:37:09,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:09,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 19:37:09,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:37:09,523 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 19:37:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:09,719 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 19:37:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:37:09,720 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 19:37:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:09,725 INFO L225 Difference]: With dead ends: 46 [2020-07-21 19:37:09,728 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 19:37:09,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:37:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 19:37:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 19:37:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 19:37:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 19:37:09,766 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 19:37:09,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:09,770 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 19:37:09,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 19:37:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 19:37:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 19:37:09,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:09,777 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:09,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:09,992 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:09,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:09,992 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 19:37:09,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:09,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53570211] [2020-07-21 19:37:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:10,044 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:10,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:10,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:37:10,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 19:37:10,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:10,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:10,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:10,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:37:10,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53570211] [2020-07-21 19:37:10,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:10,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 19:37:10,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755206165] [2020-07-21 19:37:10,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:37:10,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:10,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:37:10,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:37:10,544 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 19:37:10,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:10,749 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 19:37:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:37:10,749 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 19:37:10,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:10,752 INFO L225 Difference]: With dead ends: 51 [2020-07-21 19:37:10,752 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 19:37:10,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:37:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 19:37:10,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 19:37:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 19:37:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 19:37:10,780 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 19:37:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:10,781 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 19:37:10,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:37:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 19:37:10,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 19:37:10,790 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:10,791 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:11,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:11,007 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:11,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 19:37:11,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:11,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879916648] [2020-07-21 19:37:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:11,044 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:11,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:11,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:37:11,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 19:37:11,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:11,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:11,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:11,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:37:11,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879916648] [2020-07-21 19:37:11,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:11,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 19:37:11,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481124748] [2020-07-21 19:37:11,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:37:11,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:11,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:37:11,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:37:11,466 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 19:37:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:11,650 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 19:37:11,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:37:11,655 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 19:37:11,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:11,658 INFO L225 Difference]: With dead ends: 56 [2020-07-21 19:37:11,658 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 19:37:11,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:37:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 19:37:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 19:37:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 19:37:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 19:37:11,685 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 19:37:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:11,686 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 19:37:11,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:37:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 19:37:11,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 19:37:11,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:11,694 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:11,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:11,915 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:11,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:11,916 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 19:37:11,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:11,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663920014] [2020-07-21 19:37:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:11,983 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:11,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:11,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:37:11,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 19:37:12,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:12,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:12,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:12,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:12,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 19:37:12,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663920014] [2020-07-21 19:37:12,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:12,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 19:37:12,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083394949] [2020-07-21 19:37:12,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 19:37:12,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:12,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 19:37:12,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:37:12,723 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 19:37:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:12,977 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 19:37:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:37:12,979 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 19:37:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:12,981 INFO L225 Difference]: With dead ends: 61 [2020-07-21 19:37:12,982 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 19:37:12,983 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 [2020-07-21 19:37:12,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 19:37:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 19:37:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 19:37:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 19:37:12,996 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 19:37:12,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:13,000 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 19:37:13,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 19:37:13,000 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 19:37:13,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 19:37:13,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:13,006 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:13,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:13,223 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:13,224 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 19:37:13,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:13,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891912290] [2020-07-21 19:37:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:13,271 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:13,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:13,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:37:13,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 19:37:13,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:13,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:13,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:13,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:13,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:13,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 19:37:13,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891912290] [2020-07-21 19:37:13,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:13,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:37:13,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437073245] [2020-07-21 19:37:13,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:37:13,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:13,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:37:13,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:37:13,931 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 13 states. [2020-07-21 19:37:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:14,163 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 19:37:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:37:14,164 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-07-21 19:37:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:14,168 INFO L225 Difference]: With dead ends: 66 [2020-07-21 19:37:14,168 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 19:37:14,169 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 [2020-07-21 19:37:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 19:37:14,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 19:37:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 19:37:14,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 19:37:14,182 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 19:37:14,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:14,183 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 19:37:14,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:37:14,183 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 19:37:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 19:37:14,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:14,186 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:14,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:14,397 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 19:37:14,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:14,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805167371] [2020-07-21 19:37:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:14,462 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:14,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:14,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:37:14,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 19:37:14,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:15,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:15,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:15,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:15,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:15,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:15,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:15,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 19:37:15,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805167371] [2020-07-21 19:37:15,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:15,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:37:15,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623674279] [2020-07-21 19:37:15,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:37:15,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:15,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:37:15,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:37:15,572 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 15 states. [2020-07-21 19:37:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:15,889 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 19:37:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:37:15,890 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-07-21 19:37:15,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:15,893 INFO L225 Difference]: With dead ends: 71 [2020-07-21 19:37:15,893 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 19:37:15,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:37:15,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 19:37:15,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 19:37:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 19:37:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 19:37:15,907 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 19:37:15,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:15,908 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 19:37:15,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:37:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 19:37:15,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 19:37:15,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:15,911 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:16,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:16,125 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:16,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 19:37:16,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:16,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810639586] [2020-07-21 19:37:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:16,226 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:16,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:16,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:37:16,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 79 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-07-21 19:37:16,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:16,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:16,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:16,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:16,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 83 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-07-21 19:37:17,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810639586] [2020-07-21 19:37:17,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:17,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:37:17,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270669415] [2020-07-21 19:37:17,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:37:17,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:17,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:37:17,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:37:17,004 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 13 states. [2020-07-21 19:37:17,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:17,210 INFO L93 Difference]: Finished difference Result 84 states and 164 transitions. [2020-07-21 19:37:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:37:17,215 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-07-21 19:37:17,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:17,218 INFO L225 Difference]: With dead ends: 84 [2020-07-21 19:37:17,218 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 19:37:17,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 196 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:37:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 19:37:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2020-07-21 19:37:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 19:37:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-21 19:37:17,242 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 108 [2020-07-21 19:37:17,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:17,243 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-21 19:37:17,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:37:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-21 19:37:17,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 19:37:17,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:17,245 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:17,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:17,448 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:17,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:17,449 INFO L82 PathProgramCache]: Analyzing trace with hash -60364660, now seen corresponding path program 1 times [2020-07-21 19:37:17,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:17,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896817189] [2020-07-21 19:37:17,449 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:17,517 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:17,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:17,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:37:17,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 56 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-07-21 19:37:17,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:17,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:17,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:17,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-07-21 19:37:18,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896817189] [2020-07-21 19:37:18,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:18,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 19:37:18,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611975504] [2020-07-21 19:37:18,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:37:18,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:18,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:37:18,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:37:18,038 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 11 states. [2020-07-21 19:37:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:18,188 INFO L93 Difference]: Finished difference Result 79 states and 145 transitions. [2020-07-21 19:37:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:37:18,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2020-07-21 19:37:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:18,193 INFO L225 Difference]: With dead ends: 79 [2020-07-21 19:37:18,194 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 19:37:18,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 202 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:37:18,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 19:37:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-07-21 19:37:18,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 19:37:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 85 transitions. [2020-07-21 19:37:18,206 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 85 transitions. Word has length 109 [2020-07-21 19:37:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:18,207 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 85 transitions. [2020-07-21 19:37:18,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:37:18,207 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 85 transitions. [2020-07-21 19:37:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 19:37:18,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:18,226 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:18,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:18,440 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash 836558126, now seen corresponding path program 1 times [2020-07-21 19:37:18,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:18,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116871273] [2020-07-21 19:37:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:18,524 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:18,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:18,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:37:18,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 103 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2020-07-21 19:37:18,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:19,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:19,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:19,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:19,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:19,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:19,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:19,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 113 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-07-21 19:37:19,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116871273] [2020-07-21 19:37:19,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:19,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:37:19,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884419858] [2020-07-21 19:37:19,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:37:19,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:19,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:37:19,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:37:19,625 INFO L87 Difference]: Start difference. First operand 54 states and 85 transitions. Second operand 15 states. [2020-07-21 19:37:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:19,915 INFO L93 Difference]: Finished difference Result 94 states and 199 transitions. [2020-07-21 19:37:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:37:19,916 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-07-21 19:37:19,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:19,918 INFO L225 Difference]: With dead ends: 94 [2020-07-21 19:37:19,918 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 19:37:19,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:37:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 19:37:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-07-21 19:37:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 19:37:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 95 transitions. [2020-07-21 19:37:19,932 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 95 transitions. Word has length 135 [2020-07-21 19:37:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:19,933 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 95 transitions. [2020-07-21 19:37:19,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:37:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 95 transitions. [2020-07-21 19:37:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 19:37:19,936 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:19,936 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] [2020-07-21 19:37:20,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:20,152 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:20,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1608635723, now seen corresponding path program 2 times [2020-07-21 19:37:20,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:20,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951980622] [2020-07-21 19:37:20,154 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:20,236 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:20,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:20,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:37:20,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 78 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-07-21 19:37:20,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:20,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:20,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:20,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:20,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:20,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 82 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-07-21 19:37:20,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951980622] [2020-07-21 19:37:20,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:20,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:37:20,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307158703] [2020-07-21 19:37:20,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:37:20,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:20,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:37:20,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:37:20,948 INFO L87 Difference]: Start difference. First operand 62 states and 95 transitions. Second operand 13 states. [2020-07-21 19:37:21,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:21,156 INFO L93 Difference]: Finished difference Result 92 states and 161 transitions. [2020-07-21 19:37:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:37:21,157 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-21 19:37:21,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:21,159 INFO L225 Difference]: With dead ends: 92 [2020-07-21 19:37:21,160 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 19:37:21,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 221 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:37:21,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 19:37:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-07-21 19:37:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 19:37:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 103 transitions. [2020-07-21 19:37:21,172 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 103 transitions. Word has length 121 [2020-07-21 19:37:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:21,173 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 103 transitions. [2020-07-21 19:37:21,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:37:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 103 transitions. [2020-07-21 19:37:21,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-21 19:37:21,175 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:21,175 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:21,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:21,389 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:21,390 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 3 times [2020-07-21 19:37:21,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:21,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173690119] [2020-07-21 19:37:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:21,477 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:21,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:21,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:37:21,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-21 19:37:21,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:21,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:21,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:21,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:21,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-07-21 19:37:21,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173690119] [2020-07-21 19:37:21,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:21,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 19:37:21,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139010111] [2020-07-21 19:37:21,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:37:21,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:21,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:37:21,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:37:21,966 INFO L87 Difference]: Start difference. First operand 65 states and 103 transitions. Second operand 11 states. [2020-07-21 19:37:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:22,119 INFO L93 Difference]: Finished difference Result 84 states and 140 transitions. [2020-07-21 19:37:22,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:37:22,120 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 95 [2020-07-21 19:37:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:22,122 INFO L225 Difference]: With dead ends: 84 [2020-07-21 19:37:22,123 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 19:37:22,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 173 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:37:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 19:37:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-07-21 19:37:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 19:37:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 122 transitions. [2020-07-21 19:37:22,136 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 122 transitions. Word has length 95 [2020-07-21 19:37:22,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:22,137 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 122 transitions. [2020-07-21 19:37:22,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:37:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 122 transitions. [2020-07-21 19:37:22,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-21 19:37:22,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:22,140 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:22,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:22,355 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:22,356 INFO L82 PathProgramCache]: Analyzing trace with hash 594466134, now seen corresponding path program 4 times [2020-07-21 19:37:22,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:22,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737000824] [2020-07-21 19:37:22,358 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:22,456 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:22,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:22,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:37:22,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 83 proven. 24 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-07-21 19:37:22,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:22,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:22,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:22,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:23,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:23,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-21 19:37:23,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737000824] [2020-07-21 19:37:23,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:23,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:37:23,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489998911] [2020-07-21 19:37:23,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:37:23,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:23,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:37:23,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:37:23,185 INFO L87 Difference]: Start difference. First operand 72 states and 122 transitions. Second operand 13 states. [2020-07-21 19:37:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:23,398 INFO L93 Difference]: Finished difference Result 92 states and 158 transitions. [2020-07-21 19:37:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:37:23,399 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 107 [2020-07-21 19:37:23,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:23,401 INFO L225 Difference]: With dead ends: 92 [2020-07-21 19:37:23,402 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 19:37:23,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 193 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:37:23,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 19:37:23,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2020-07-21 19:37:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 19:37:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-21 19:37:23,430 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 107 [2020-07-21 19:37:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:23,431 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-21 19:37:23,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:37:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-21 19:37:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 19:37:23,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:23,436 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:23,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:23,649 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:23,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:23,649 INFO L82 PathProgramCache]: Analyzing trace with hash 235412830, now seen corresponding path program 5 times [2020-07-21 19:37:23,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:23,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77832246] [2020-07-21 19:37:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:23,760 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:23,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:23,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:37:23,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 19 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-07-21 19:37:23,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:24,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:24,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:24,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:24,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 19:37:24,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77832246] [2020-07-21 19:37:24,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:24,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 19:37:24,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792491663] [2020-07-21 19:37:24,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:37:24,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:24,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:37:24,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:37:24,262 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 11 states. [2020-07-21 19:37:24,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:24,408 INFO L93 Difference]: Finished difference Result 91 states and 155 transitions. [2020-07-21 19:37:24,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:37:24,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-07-21 19:37:24,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:24,416 INFO L225 Difference]: With dead ends: 91 [2020-07-21 19:37:24,416 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 19:37:24,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:37:24,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 19:37:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-07-21 19:37:24,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 19:37:24,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-21 19:37:24,436 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 108 [2020-07-21 19:37:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:24,437 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-21 19:37:24,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:37:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-21 19:37:24,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 19:37:24,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:24,443 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:24,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:24,658 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:24,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:24,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 6 times [2020-07-21 19:37:24,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:24,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622337790] [2020-07-21 19:37:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:24,802 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:24,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:24,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-21 19:37:24,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-21 19:37:25,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-21 19:37:26,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622337790] [2020-07-21 19:37:26,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:26,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-21 19:37:26,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048920719] [2020-07-21 19:37:26,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 19:37:26,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:26,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 19:37:26,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:37:26,322 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 28 states. [2020-07-21 19:37:26,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:26,837 INFO L93 Difference]: Finished difference Result 148 states and 317 transitions. [2020-07-21 19:37:26,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 19:37:26,838 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-07-21 19:37:26,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:26,841 INFO L225 Difference]: With dead ends: 148 [2020-07-21 19:37:26,842 INFO L226 Difference]: Without dead ends: 144 [2020-07-21 19:37:26,844 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 [2020-07-21 19:37:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-21 19:37:26,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2020-07-21 19:37:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 19:37:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 226 transitions. [2020-07-21 19:37:26,863 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 226 transitions. Word has length 109 [2020-07-21 19:37:26,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:26,864 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 226 transitions. [2020-07-21 19:37:26,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 19:37:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 226 transitions. [2020-07-21 19:37:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-07-21 19:37:26,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:26,868 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:27,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:27,083 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:27,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:27,084 INFO L82 PathProgramCache]: Analyzing trace with hash -706406608, now seen corresponding path program 7 times [2020-07-21 19:37:27,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:27,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643960515] [2020-07-21 19:37:27,086 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:27,195 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:27,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:27,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:37:27,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 60 proven. 97 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-07-21 19:37:27,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:27,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:28,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:28,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:28,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:28,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:28,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 62 proven. 100 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2020-07-21 19:37:28,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643960515] [2020-07-21 19:37:28,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:28,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:37:28,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892711487] [2020-07-21 19:37:28,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:37:28,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:28,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:37:28,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:37:28,212 INFO L87 Difference]: Start difference. First operand 107 states and 226 transitions. Second operand 13 states. [2020-07-21 19:37:28,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:28,440 INFO L93 Difference]: Finished difference Result 156 states and 384 transitions. [2020-07-21 19:37:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:37:28,441 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-07-21 19:37:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:28,444 INFO L225 Difference]: With dead ends: 156 [2020-07-21 19:37:28,444 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 19:37:28,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 253 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:37:28,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 19:37:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2020-07-21 19:37:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 19:37:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 226 transitions. [2020-07-21 19:37:28,467 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 226 transitions. Word has length 137 [2020-07-21 19:37:28,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:28,467 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 226 transitions. [2020-07-21 19:37:28,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:37:28,468 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 226 transitions. [2020-07-21 19:37:28,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-21 19:37:28,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:28,473 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:28,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:28,686 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:28,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1521075862, now seen corresponding path program 8 times [2020-07-21 19:37:28,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:28,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675278738] [2020-07-21 19:37:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:28,813 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:28,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:28,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:37:28,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 17 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-21 19:37:28,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:29,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:29,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:29,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:29,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:29,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:29,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:29,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 24 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-21 19:37:29,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675278738] [2020-07-21 19:37:29,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:29,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:37:29,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136985762] [2020-07-21 19:37:29,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:37:29,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:29,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:37:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:37:29,580 INFO L87 Difference]: Start difference. First operand 107 states and 226 transitions. Second operand 13 states. [2020-07-21 19:37:29,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:29,853 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2020-07-21 19:37:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:37:29,854 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 110 [2020-07-21 19:37:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:29,857 INFO L225 Difference]: With dead ends: 138 [2020-07-21 19:37:29,858 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 19:37:29,859 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 [2020-07-21 19:37:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 19:37:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2020-07-21 19:37:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-21 19:37:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 257 transitions. [2020-07-21 19:37:29,880 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 257 transitions. Word has length 110 [2020-07-21 19:37:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:29,880 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 257 transitions. [2020-07-21 19:37:29,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:37:29,881 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 257 transitions. [2020-07-21 19:37:29,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 19:37:29,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:29,886 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:30,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:30,102 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:30,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:30,103 INFO L82 PathProgramCache]: Analyzing trace with hash 989968015, now seen corresponding path program 9 times [2020-07-21 19:37:30,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:30,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620532689] [2020-07-21 19:37:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:30,203 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:30,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:30,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 19:37:30,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 112 proven. 26 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-21 19:37:30,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:30,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:31,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:31,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:31,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:31,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 111 proven. 31 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 19:37:31,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620532689] [2020-07-21 19:37:31,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:31,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 19:37:31,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161812615] [2020-07-21 19:37:31,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:37:31,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:31,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:37:31,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:37:31,316 INFO L87 Difference]: Start difference. First operand 114 states and 257 transitions. Second operand 15 states. [2020-07-21 19:37:31,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:31,663 INFO L93 Difference]: Finished difference Result 147 states and 340 transitions. [2020-07-21 19:37:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:37:31,663 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 19:37:31,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:31,666 INFO L225 Difference]: With dead ends: 147 [2020-07-21 19:37:31,666 INFO L226 Difference]: Without dead ends: 143 [2020-07-21 19:37:31,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:37:31,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-21 19:37:31,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 102. [2020-07-21 19:37:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 19:37:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2020-07-21 19:37:31,687 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 121 [2020-07-21 19:37:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:31,687 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2020-07-21 19:37:31,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:37:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2020-07-21 19:37:31,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 19:37:31,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:31,693 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:31,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:31,906 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:31,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:31,907 INFO L82 PathProgramCache]: Analyzing trace with hash -77183713, now seen corresponding path program 10 times [2020-07-21 19:37:31,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:31,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172833635] [2020-07-21 19:37:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:32,009 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:32,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:32,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 19:37:32,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 87 proven. 22 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2020-07-21 19:37:32,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:32,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:32,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:32,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:32,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 86 proven. 24 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-07-21 19:37:32,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172833635] [2020-07-21 19:37:32,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:32,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 19:37:32,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042928134] [2020-07-21 19:37:32,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:37:32,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:32,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:37:32,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:37:32,617 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand 13 states. [2020-07-21 19:37:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:32,824 INFO L93 Difference]: Finished difference Result 128 states and 276 transitions. [2020-07-21 19:37:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:37:32,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-21 19:37:32,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:32,828 INFO L225 Difference]: With dead ends: 128 [2020-07-21 19:37:32,828 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 19:37:32,830 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 [2020-07-21 19:37:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 19:37:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2020-07-21 19:37:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 19:37:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 184 transitions. [2020-07-21 19:37:32,844 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 184 transitions. Word has length 121 [2020-07-21 19:37:32,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:32,844 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 184 transitions. [2020-07-21 19:37:32,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:37:32,844 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 184 transitions. [2020-07-21 19:37:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 19:37:32,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:32,848 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:33,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:33,063 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:33,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1853548191, now seen corresponding path program 11 times [2020-07-21 19:37:33,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:33,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783861772] [2020-07-21 19:37:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:33,166 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:33,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:33,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 19:37:33,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 67 proven. 71 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-21 19:37:33,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:33,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:33,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:33,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:33,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:34,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 19:37:34,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783861772] [2020-07-21 19:37:34,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:34,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 19:37:34,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463028214] [2020-07-21 19:37:34,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:37:34,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:34,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:37:34,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:37:34,130 INFO L87 Difference]: Start difference. First operand 94 states and 184 transitions. Second operand 15 states. [2020-07-21 19:37:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:34,471 INFO L93 Difference]: Finished difference Result 126 states and 280 transitions. [2020-07-21 19:37:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:37:34,472 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 19:37:34,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:34,475 INFO L225 Difference]: With dead ends: 126 [2020-07-21 19:37:34,475 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 19:37:34,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:37:34,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 19:37:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2020-07-21 19:37:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 19:37:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 147 transitions. [2020-07-21 19:37:34,492 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 147 transitions. Word has length 121 [2020-07-21 19:37:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:34,492 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 147 transitions. [2020-07-21 19:37:34,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:37:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 147 transitions. [2020-07-21 19:37:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-21 19:37:34,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:34,496 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:34,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:34,711 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:34,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:34,712 INFO L82 PathProgramCache]: Analyzing trace with hash 250703466, now seen corresponding path program 1 times [2020-07-21 19:37:34,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:34,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284384894] [2020-07-21 19:37:34,712 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:34,834 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:34,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:34,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:37:34,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 36 proven. 94 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-07-21 19:37:34,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:35,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:35,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:35,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:35,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:35,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:35,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:35,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:35,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 38 proven. 102 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-07-21 19:37:35,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284384894] [2020-07-21 19:37:35,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:35,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:37:35,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210348309] [2020-07-21 19:37:35,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:37:35,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:35,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:37:35,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:37:35,919 INFO L87 Difference]: Start difference. First operand 81 states and 147 transitions. Second operand 15 states. [2020-07-21 19:37:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:36,216 INFO L93 Difference]: Finished difference Result 124 states and 266 transitions. [2020-07-21 19:37:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:37:36,216 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 110 [2020-07-21 19:37:36,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:36,218 INFO L225 Difference]: With dead ends: 124 [2020-07-21 19:37:36,218 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 19:37:36,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 195 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:37:36,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 19:37:36,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-07-21 19:37:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 19:37:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-07-21 19:37:36,230 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 110 [2020-07-21 19:37:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:36,230 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-07-21 19:37:36,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:37:36,230 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-07-21 19:37:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 19:37:36,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:36,233 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:36,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:36,447 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:36,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1905629551, now seen corresponding path program 12 times [2020-07-21 19:37:36,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:36,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327083263] [2020-07-21 19:37:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:36,566 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:36,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:36,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 19:37:36,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 50 proven. 107 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-21 19:37:36,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:37,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:37,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:37,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:37,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:37,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:37,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:37,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 48 proven. 117 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-07-21 19:37:37,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327083263] [2020-07-21 19:37:37,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:37,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 19:37:37,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832171695] [2020-07-21 19:37:37,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:37:37,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:37,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:37:37,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:37:37,910 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 17 states. [2020-07-21 19:37:38,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:38,318 INFO L93 Difference]: Finished difference Result 129 states and 200 transitions. [2020-07-21 19:37:38,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:37:38,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2020-07-21 19:37:38,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:38,321 INFO L225 Difference]: With dead ends: 129 [2020-07-21 19:37:38,321 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 19:37:38,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 215 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:37:38,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 19:37:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-21 19:37:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 19:37:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-21 19:37:38,329 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 121 [2020-07-21 19:37:38,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:38,330 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-21 19:37:38,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:37:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-21 19:37:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 19:37:38,332 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:38,332 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:38,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:38,546 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:38,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1847656481, now seen corresponding path program 13 times [2020-07-21 19:37:38,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:38,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708957185] [2020-07-21 19:37:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:38,673 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:38,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:38,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 19:37:38,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 52 proven. 86 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-21 19:37:38,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:39,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:39,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:39,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:39,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:39,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:39,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 53 proven. 89 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 19:37:39,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708957185] [2020-07-21 19:37:39,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:39,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 19:37:39,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023167378] [2020-07-21 19:37:39,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:37:39,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:39,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:37:39,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:37:39,787 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 15 states. [2020-07-21 19:37:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:40,022 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-07-21 19:37:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:37:40,023 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 19:37:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:40,024 INFO L225 Difference]: With dead ends: 61 [2020-07-21 19:37:40,024 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:37:40,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:37:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:37:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:37:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:37:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:37:40,027 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2020-07-21 19:37:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:40,030 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:37:40,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:37:40,031 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:37:40,031 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:37:40,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:40,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:37:40,664 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2020-07-21 19:37:42,157 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 35 [2020-07-21 19:37:42,801 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 43 [2020-07-21 19:37:43,500 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 21 [2020-07-21 19:37:43,852 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-07-21 19:37:43,856 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 19:37:43,857 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:37:43,857 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:37:43,857 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 19:37:43,857 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 19:37:43,857 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 19:37:43,857 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 19:37:43,857 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 19:37:43,858 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 19:37:43,858 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 19:37:43,858 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 19:37:43,858 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 19:37:43,858 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-07-21 19:37:43,858 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 19:37:43,858 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 19:37:43,858 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 19:37:43,859 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 19:37:43,859 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 19:37:43,859 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (or (<= 5 |fibo2_#in~n|) (and (<= 4 |fibo2_#in~n|) (= 2 |fibo2_#t~ret2|)) (and (= 1 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 3))) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 19:37:43,859 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 19:37:43,859 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 19:37:43,859 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 19:37:43,859 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 19:37:43,860 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 19:37:43,860 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 19:37:43,860 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-21 19:37:43,860 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 19:37:43,860 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 4 |fibo1_#in~n|)) (and (<= 2 |fibo1_#in~n|) .cse0 (= 1 |fibo1_#t~ret0|)))) (let ((.cse1 (<= |fibo1_#in~n| fibo1_~n))) (or (and (<= 6 |fibo1_#in~n|) .cse1) (and (= 3 |fibo1_#t~ret0|) .cse1) (and (<= |fibo1_#in~n| 4) .cse1)))) [2020-07-21 19:37:43,860 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 19:37:43,860 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 19:37:43,861 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 19:37:43,861 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 19:37:43,861 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 19:37:43,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:37:43 BoogieIcfgContainer [2020-07-21 19:37:43,870 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:37:43,872 INFO L168 Benchmark]: Toolchain (without parser) took 37814.33 ms. Allocated memory was 144.7 MB in the beginning and 501.2 MB in the end (delta: 356.5 MB). Free memory was 102.9 MB in the beginning and 363.1 MB in the end (delta: -260.1 MB). Peak memory consumption was 354.4 MB. Max. memory is 7.1 GB. [2020-07-21 19:37:43,872 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 19:37:43,873 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.39 ms. Allocated memory is still 144.7 MB. Free memory was 102.5 MB in the beginning and 93.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 19:37:43,874 INFO L168 Benchmark]: Boogie Preprocessor took 34.27 ms. Allocated memory is still 144.7 MB. Free memory was 93.2 MB in the beginning and 91.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-07-21 19:37:43,875 INFO L168 Benchmark]: RCFGBuilder took 437.96 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.6 MB in the beginning and 167.7 MB in the end (delta: -76.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 19:37:43,875 INFO L168 Benchmark]: TraceAbstraction took 36978.84 ms. Allocated memory was 201.9 MB in the beginning and 501.2 MB in the end (delta: 299.4 MB). Free memory was 167.0 MB in the beginning and 363.1 MB in the end (delta: -196.1 MB). Peak memory consumption was 361.3 MB. Max. memory is 7.1 GB. [2020-07-21 19:37:43,878 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 353.39 ms. Allocated memory is still 144.7 MB. Free memory was 102.5 MB in the beginning and 93.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.27 ms. Allocated memory is still 144.7 MB. Free memory was 93.2 MB in the beginning and 91.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 437.96 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.6 MB in the beginning and 167.7 MB in the end (delta: -76.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 36978.84 ms. Allocated memory was 201.9 MB in the beginning and 501.2 MB in the end (delta: 299.4 MB). Free memory was 167.0 MB in the beginning and 363.1 MB in the end (delta: -196.1 MB). Peak memory consumption was 361.3 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: 33.2s, OverallIterations: 25, TraceHistogramMax: 11, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 707 SDtfs, 785 SDslu, 4765 SDs, 0 SdLazy, 3930 SolverSat, 554 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4445 GetRequests, 3901 SyntacticMatches, 181 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 5.2s 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, 2.9s HoareSimplificationTime, 11 FomulaSimplificationsInter, 2083 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 18.6s InterpolantComputationTime, 2197 NumberOfCodeBlocks, 2184 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 4319 ConstructedInterpolants, 0 QuantifiedInterpolants, 829261 SizeOfPredicates, 108 NumberOfNonLiveVariables, 4886 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...