/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:17:03,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:17:03,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:17:03,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:17:03,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:17:03,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:17:03,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:17:03,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:17:03,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:17:03,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:17:03,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:17:03,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:17:03,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:17:03,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:17:03,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:17:03,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:17:03,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:17:03,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:17:03,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:17:03,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:17:03,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:17:03,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:17:03,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:17:03,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:17:03,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 13:17:03,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:17:03,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:17:03,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:17:03,602 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 13:17:03,639 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:17:03,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:17:03,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:17:03,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:17:03,641 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:17:03,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:17:03,642 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:17:03,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:17:03,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:17:03,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:17:03,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:17:03,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:17:03,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:17:03,644 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:17:03,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:17:03,644 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:17:03,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:17:03,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:17:03,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:17:03,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:17:03,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:17:03,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:17:03,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:17:03,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:17:03,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:17:03,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:17:03,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:03,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:17:03,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:17:03,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 13:17:03,958 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:17:03,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:17:03,976 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:17:03,978 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:17:03,978 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:17:03,979 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-21 13:17:04,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66d7c79ab/7ac22425c48a4a9e9c6e3e9b47085af7/FLAGa81ca1f5d [2020-07-21 13:17:04,556 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:17:04,557 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-21 13:17:04,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66d7c79ab/7ac22425c48a4a9e9c6e3e9b47085af7/FLAGa81ca1f5d [2020-07-21 13:17:04,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66d7c79ab/7ac22425c48a4a9e9c6e3e9b47085af7 [2020-07-21 13:17:04,975 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:17:04,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:17:04,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:17:04,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:17:04,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:17:04,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:17:04" (1/1) ... [2020-07-21 13:17:04,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75bc0f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:17:04, skipping insertion in model container [2020-07-21 13:17:04,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:17:04" (1/1) ... [2020-07-21 13:17:04,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:17:05,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:17:05,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:17:05,194 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:17:05,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:17:05,227 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:17:05,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:17:05 WrapperNode [2020-07-21 13:17:05,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:17:05,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:17:05,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:17:05,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:17:05,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:17:05" (1/1) ... [2020-07-21 13:17:05,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:17:05" (1/1) ... [2020-07-21 13:17:05,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:17:05" (1/1) ... [2020-07-21 13:17:05,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:17:05" (1/1) ... [2020-07-21 13:17:05,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:17:05" (1/1) ... [2020-07-21 13:17:05,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:17:05" (1/1) ... [2020-07-21 13:17:05,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:17:05" (1/1) ... [2020-07-21 13:17:05,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:17:05,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:17:05,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:17:05,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:17:05,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:17:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:17:05,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:17:05,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:17:05,421 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 13:17:05,422 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 13:17:05,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:17:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:17:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:17:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 13:17:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 13:17:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:17:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:17:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:17:05,634 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:17:05,635 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 13:17:05,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:17:05 BoogieIcfgContainer [2020-07-21 13:17:05,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:17:05,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:17:05,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:17:05,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:17:05,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:17:04" (1/3) ... [2020-07-21 13:17:05,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5655a56a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:17:05, skipping insertion in model container [2020-07-21 13:17:05,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:17:05" (2/3) ... [2020-07-21 13:17:05,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5655a56a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:17:05, skipping insertion in model container [2020-07-21 13:17:05,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:17:05" (3/3) ... [2020-07-21 13:17:05,650 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-07-21 13:17:05,662 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:17:05,670 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:17:05,691 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:17:05,724 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:17:05,725 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:17:05,725 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:17:05,725 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:17:05,725 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:17:05,726 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:17:05,726 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:17:05,726 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:17:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 13:17:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 13:17:05,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:05,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:17:05,776 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:05,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:05,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 13:17:05,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:05,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252650624] [2020-07-21 13:17:05,796 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 13:17:05,870 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:05,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:05,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:17:05,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:05,986 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 13:17:05,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:17:05,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252650624] [2020-07-21 13:17:05,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:17:05,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:17:05,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444029230] [2020-07-21 13:17:05,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:17:05,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:06,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:17:06,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:17:06,009 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 13:17:06,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:06,123 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 13:17:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:17:06,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 13:17:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:06,137 INFO L225 Difference]: With dead ends: 44 [2020-07-21 13:17:06,138 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 13:17:06,141 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 13:17:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 13:17:06,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 13:17:06,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 13:17:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 13:17:06,192 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 13:17:06,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:06,192 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 13:17:06,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:17:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 13:17:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 13:17:06,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:06,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:17:06,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:06,412 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:06,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 13:17:06,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:06,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299525225] [2020-07-21 13:17:06,414 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 13:17:06,456 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:06,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:06,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:17:06,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:06,486 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 13:17:06,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:17:06,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299525225] [2020-07-21 13:17:06,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:17:06,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:17:06,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013361495] [2020-07-21 13:17:06,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:17:06,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:06,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:17:06,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:17:06,492 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 13:17:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:06,562 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 13:17:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:17:06,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 13:17:06,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:06,565 INFO L225 Difference]: With dead ends: 36 [2020-07-21 13:17:06,565 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 13:17:06,567 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 13:17:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 13:17:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 13:17:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 13:17:06,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 13:17:06,579 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 13:17:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:06,580 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 13:17:06,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:17:06,580 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 13:17:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 13:17:06,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:06,583 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 13:17:06,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:06,784 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:06,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 13:17:06,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:06,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500910167] [2020-07-21 13:17:06,788 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 13:17:06,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:06,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:06,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:17:06,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:06,907 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 13:17:06,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:07,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:07,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:07,159 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 13:17:07,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500910167] [2020-07-21 13:17:07,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:07,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 13:17:07,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051905009] [2020-07-21 13:17:07,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 13:17:07,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 13:17:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 13:17:07,163 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 13:17:07,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:07,276 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 13:17:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:17:07,277 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 13:17:07,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:07,279 INFO L225 Difference]: With dead ends: 41 [2020-07-21 13:17:07,279 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 13:17:07,280 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 13:17:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 13:17:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 13:17:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 13:17:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 13:17:07,290 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 13:17:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:07,291 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 13:17:07,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 13:17:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 13:17:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 13:17:07,293 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:07,293 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 13:17:07,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:07,508 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:07,509 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 13:17:07,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:07,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82540980] [2020-07-21 13:17:07,511 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 13:17:07,542 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:07,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:07,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:17:07,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:07,596 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 13:17:07,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:07,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:07,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:07,841 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 13:17:07,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82540980] [2020-07-21 13:17:07,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:07,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 13:17:07,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087568607] [2020-07-21 13:17:07,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 13:17:07,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:07,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 13:17:07,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 13:17:07,849 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 13:17:07,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:07,992 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 13:17:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:17:07,992 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 13:17:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:07,998 INFO L225 Difference]: With dead ends: 46 [2020-07-21 13:17:07,998 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 13:17:07,999 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 13:17:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 13:17:08,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 13:17:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 13:17:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 13:17:08,020 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 13:17:08,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:08,020 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 13:17:08,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 13:17:08,021 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 13:17:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 13:17:08,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:08,026 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 13:17:08,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:08,243 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:08,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:08,244 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 13:17:08,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:08,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876486963] [2020-07-21 13:17:08,246 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 13:17:08,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:08,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:08,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:17:08,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:08,355 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 13:17:08,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:08,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:08,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:08,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:08,783 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 13:17:08,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876486963] [2020-07-21 13:17:08,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:08,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 13:17:08,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179572112] [2020-07-21 13:17:08,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 13:17:08,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:08,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 13:17:08,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:17:08,786 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 13:17:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:08,985 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 13:17:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:17:08,986 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 13:17:08,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:08,987 INFO L225 Difference]: With dead ends: 51 [2020-07-21 13:17:08,988 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 13:17:08,989 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 13:17:08,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 13:17:08,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 13:17:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 13:17:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 13:17:09,000 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 13:17:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:09,000 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 13:17:09,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 13:17:09,001 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 13:17:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 13:17:09,002 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:09,003 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 13:17:09,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:09,217 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:09,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 13:17:09,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:09,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099045026] [2020-07-21 13:17:09,219 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 13:17:09,251 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:09,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:09,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:17:09,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:09,311 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 13:17:09,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:09,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:09,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:09,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:09,619 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 13:17:09,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099045026] [2020-07-21 13:17:09,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:09,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 13:17:09,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407475334] [2020-07-21 13:17:09,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 13:17:09,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:09,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 13:17:09,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:17:09,623 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 13:17:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:09,806 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 13:17:09,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:17:09,810 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 13:17:09,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:09,814 INFO L225 Difference]: With dead ends: 56 [2020-07-21 13:17:09,814 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 13:17:09,815 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 13:17:09,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 13:17:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 13:17:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 13:17:09,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 13:17:09,842 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 13:17:09,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:09,842 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 13:17:09,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 13:17:09,843 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 13:17:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 13:17:09,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:09,850 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 13:17:10,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:10,068 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:10,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:10,069 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 13:17:10,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:10,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765099152] [2020-07-21 13:17:10,070 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 13:17:10,123 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:10,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:10,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:17:10,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:10,197 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 13:17:10,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:10,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:10,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:10,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:10,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:10,740 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 13:17:10,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765099152] [2020-07-21 13:17:10,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:10,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 13:17:10,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191430797] [2020-07-21 13:17:10,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 13:17:10,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:10,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 13:17:10,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:17:10,743 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 13:17:10,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:10,971 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 13:17:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:17:10,971 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 13:17:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:10,973 INFO L225 Difference]: With dead ends: 61 [2020-07-21 13:17:10,973 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 13:17:10,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 13:17:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 13:17:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 13:17:10,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 13:17:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 13:17:10,985 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 13:17:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:10,986 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 13:17:10,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 13:17:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 13:17:10,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 13:17:10,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:10,988 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 13:17:11,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:11,193 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:11,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:11,194 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 13:17:11,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:11,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192131867] [2020-07-21 13:17:11,196 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 13:17:11,240 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:11,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:11,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:17:11,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:11,310 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 13:17:11,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:11,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:11,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:11,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:11,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:11,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:11,852 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 13:17:11,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192131867] [2020-07-21 13:17:11,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:11,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 13:17:11,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113608581] [2020-07-21 13:17:11,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:17:11,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:11,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:17:11,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:17:11,855 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 13 states. [2020-07-21 13:17:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:12,081 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 13:17:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:17:12,082 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-07-21 13:17:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:12,084 INFO L225 Difference]: With dead ends: 66 [2020-07-21 13:17:12,084 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 13:17:12,086 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 13:17:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 13:17:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 13:17:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 13:17:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 13:17:12,102 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 13:17:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:12,103 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 13:17:12,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:17:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 13:17:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 13:17:12,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:12,105 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 13:17:12,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:12,320 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:12,322 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 13:17:12,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:12,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540086365] [2020-07-21 13:17:12,323 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:12,392 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:12,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:12,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:17:12,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:12,471 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 13:17:12,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:13,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:13,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:13,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:13,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:13,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:13,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:13,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:13,412 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 13:17:13,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540086365] [2020-07-21 13:17:13,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:13,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:17:13,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573223115] [2020-07-21 13:17:13,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:17:13,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:13,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:17:13,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:17:13,417 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 15 states. [2020-07-21 13:17:13,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:13,676 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 13:17:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:17:13,677 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-07-21 13:17:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:13,680 INFO L225 Difference]: With dead ends: 71 [2020-07-21 13:17:13,680 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 13:17:13,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:17:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 13:17:13,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 13:17:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 13:17:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 13:17:13,693 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 13:17:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:13,694 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 13:17:13,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:17:13,694 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 13:17:13,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 13:17:13,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:13,696 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 13:17:13,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:13,913 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:13,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 13:17:13,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:13,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591516570] [2020-07-21 13:17:13,915 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 13:17:13,981 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:13,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:13,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:17:13,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:14,052 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 13:17:14,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:14,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:14,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:14,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:14,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:14,722 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 13:17:14,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591516570] [2020-07-21 13:17:14,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:14,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 13:17:14,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306000987] [2020-07-21 13:17:14,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:17:14,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:14,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:17:14,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:17:14,725 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 13 states. [2020-07-21 13:17:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:14,906 INFO L93 Difference]: Finished difference Result 84 states and 164 transitions. [2020-07-21 13:17:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:17:14,910 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-07-21 13:17:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:14,912 INFO L225 Difference]: With dead ends: 84 [2020-07-21 13:17:14,912 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 13:17:14,914 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 13:17:14,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 13:17:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2020-07-21 13:17:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 13:17:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-21 13:17:14,946 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 108 [2020-07-21 13:17:14,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:14,947 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-21 13:17:14,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:17:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-21 13:17:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 13:17:14,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:14,949 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 13:17:15,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:15,167 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash -60364660, now seen corresponding path program 1 times [2020-07-21 13:17:15,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:15,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598415988] [2020-07-21 13:17:15,169 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 13:17:15,237 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:15,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:17:15,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:15,299 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 13:17:15,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:15,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:15,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:15,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-07-21 13:17:15,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598415988] [2020-07-21 13:17:15,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:15,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 13:17:15,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824158059] [2020-07-21 13:17:15,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:17:15,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:15,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:17:15,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:17:15,740 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 11 states. [2020-07-21 13:17:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:15,875 INFO L93 Difference]: Finished difference Result 79 states and 145 transitions. [2020-07-21 13:17:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:17:15,878 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2020-07-21 13:17:15,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:15,880 INFO L225 Difference]: With dead ends: 79 [2020-07-21 13:17:15,880 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 13:17:15,881 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 13:17:15,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 13:17:15,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-07-21 13:17:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 13:17:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 85 transitions. [2020-07-21 13:17:15,891 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 85 transitions. Word has length 109 [2020-07-21 13:17:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:15,892 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 85 transitions. [2020-07-21 13:17:15,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:17:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 85 transitions. [2020-07-21 13:17:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 13:17:15,894 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:15,894 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 13:17:16,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:16,102 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:16,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:16,102 INFO L82 PathProgramCache]: Analyzing trace with hash 836558126, now seen corresponding path program 1 times [2020-07-21 13:17:16,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:16,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278796240] [2020-07-21 13:17:16,104 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 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 13:17:16,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:16,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:17:16,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:16,256 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 13:17:16,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:16,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:17,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:17,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:17,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:17,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:17,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:17,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:17,242 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 13:17:17,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278796240] [2020-07-21 13:17:17,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:17,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:17:17,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568717742] [2020-07-21 13:17:17,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:17:17,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:17,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:17:17,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:17:17,245 INFO L87 Difference]: Start difference. First operand 54 states and 85 transitions. Second operand 15 states. [2020-07-21 13:17:17,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:17,515 INFO L93 Difference]: Finished difference Result 94 states and 199 transitions. [2020-07-21 13:17:17,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:17:17,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-07-21 13:17:17,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:17,518 INFO L225 Difference]: With dead ends: 94 [2020-07-21 13:17:17,518 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 13:17:17,520 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 13:17:17,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 13:17:17,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-07-21 13:17:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 13:17:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 95 transitions. [2020-07-21 13:17:17,530 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 95 transitions. Word has length 135 [2020-07-21 13:17:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:17,530 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 95 transitions. [2020-07-21 13:17:17,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:17:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 95 transitions. [2020-07-21 13:17:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 13:17:17,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:17,534 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 13:17:17,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:17,748 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:17,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:17,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1608635723, now seen corresponding path program 2 times [2020-07-21 13:17:17,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:17,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586268287] [2020-07-21 13:17:17,751 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 13:17:17,835 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:17,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:17,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:17:17,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:17,902 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 13:17:17,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:18,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:18,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:18,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:18,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:18,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:18,542 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 13:17:18,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586268287] [2020-07-21 13:17:18,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:18,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 13:17:18,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057594427] [2020-07-21 13:17:18,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:17:18,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:18,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:17:18,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:17:18,545 INFO L87 Difference]: Start difference. First operand 62 states and 95 transitions. Second operand 13 states. [2020-07-21 13:17:18,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:18,735 INFO L93 Difference]: Finished difference Result 92 states and 161 transitions. [2020-07-21 13:17:18,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:17:18,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-21 13:17:18,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:18,738 INFO L225 Difference]: With dead ends: 92 [2020-07-21 13:17:18,738 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 13:17:18,739 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 13:17:18,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 13:17:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-07-21 13:17:18,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 13:17:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 103 transitions. [2020-07-21 13:17:18,749 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 103 transitions. Word has length 121 [2020-07-21 13:17:18,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:18,750 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 103 transitions. [2020-07-21 13:17:18,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:17:18,750 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 103 transitions. [2020-07-21 13:17:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-21 13:17:18,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:18,752 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 13:17:18,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:18,966 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:18,966 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 3 times [2020-07-21 13:17:18,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:18,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127672300] [2020-07-21 13:17:18,967 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 13:17:19,043 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:19,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:19,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:17:19,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:19,099 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 13:17:19,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:19,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:19,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:19,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:19,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:19,512 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 13:17:19,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127672300] [2020-07-21 13:17:19,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:19,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 13:17:19,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936821818] [2020-07-21 13:17:19,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:17:19,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:17:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:17:19,515 INFO L87 Difference]: Start difference. First operand 65 states and 103 transitions. Second operand 11 states. [2020-07-21 13:17:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:19,639 INFO L93 Difference]: Finished difference Result 84 states and 140 transitions. [2020-07-21 13:17:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:17:19,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 95 [2020-07-21 13:17:19,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:19,641 INFO L225 Difference]: With dead ends: 84 [2020-07-21 13:17:19,641 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 13:17:19,642 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 13:17:19,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 13:17:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-07-21 13:17:19,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 13:17:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 122 transitions. [2020-07-21 13:17:19,651 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 122 transitions. Word has length 95 [2020-07-21 13:17:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:19,652 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 122 transitions. [2020-07-21 13:17:19,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:17:19,652 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 122 transitions. [2020-07-21 13:17:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-21 13:17:19,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:19,654 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 13:17:19,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:19,868 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash 594466134, now seen corresponding path program 4 times [2020-07-21 13:17:19,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:19,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925412762] [2020-07-21 13:17:19,870 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 13:17:19,947 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:19,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:17:19,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:20,000 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 13:17:20,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:20,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:20,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:20,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:20,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:20,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:20,615 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 13:17:20,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925412762] [2020-07-21 13:17:20,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:20,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 13:17:20,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662893119] [2020-07-21 13:17:20,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:17:20,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:20,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:17:20,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:17:20,617 INFO L87 Difference]: Start difference. First operand 72 states and 122 transitions. Second operand 13 states. [2020-07-21 13:17:20,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:20,800 INFO L93 Difference]: Finished difference Result 92 states and 158 transitions. [2020-07-21 13:17:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:17:20,801 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 107 [2020-07-21 13:17:20,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:20,803 INFO L225 Difference]: With dead ends: 92 [2020-07-21 13:17:20,803 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 13:17:20,804 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 13:17:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 13:17:20,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2020-07-21 13:17:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 13:17:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-21 13:17:20,824 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 107 [2020-07-21 13:17:20,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:20,824 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-21 13:17:20,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:17:20,825 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-21 13:17:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 13:17:20,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:20,828 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 13:17:21,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:21,043 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:21,043 INFO L82 PathProgramCache]: Analyzing trace with hash 235412830, now seen corresponding path program 5 times [2020-07-21 13:17:21,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:21,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221255979] [2020-07-21 13:17:21,044 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 13:17:21,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:21,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:21,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:17:21,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:21,200 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 13:17:21,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:21,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:21,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:21,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:21,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:21,603 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 13:17:21,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221255979] [2020-07-21 13:17:21,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:21,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 13:17:21,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157652997] [2020-07-21 13:17:21,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:17:21,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:21,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:17:21,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:17:21,606 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 11 states. [2020-07-21 13:17:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:21,736 INFO L93 Difference]: Finished difference Result 91 states and 155 transitions. [2020-07-21 13:17:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:17:21,737 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-07-21 13:17:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:21,739 INFO L225 Difference]: With dead ends: 91 [2020-07-21 13:17:21,739 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 13:17:21,744 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 13:17:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 13:17:21,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-07-21 13:17:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 13:17:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-21 13:17:21,755 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 108 [2020-07-21 13:17:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:21,755 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-21 13:17:21,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:17:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-21 13:17:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 13:17:21,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:21,758 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 13:17:21,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:21,972 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:21,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:21,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 6 times [2020-07-21 13:17:21,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:21,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878879023] [2020-07-21 13:17:21,975 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 13:17:22,059 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:22,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:22,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-21 13:17:22,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:22,336 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 13:17:22,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:23,288 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 13:17:23,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878879023] [2020-07-21 13:17:23,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:23,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-21 13:17:23,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472171337] [2020-07-21 13:17:23,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 13:17:23,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 13:17:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-21 13:17:23,291 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 28 states. [2020-07-21 13:17:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:23,737 INFO L93 Difference]: Finished difference Result 148 states and 317 transitions. [2020-07-21 13:17:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 13:17:23,737 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-07-21 13:17:23,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:23,740 INFO L225 Difference]: With dead ends: 148 [2020-07-21 13:17:23,740 INFO L226 Difference]: Without dead ends: 144 [2020-07-21 13:17:23,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2020-07-21 13:17:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-21 13:17:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2020-07-21 13:17:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 13:17:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 226 transitions. [2020-07-21 13:17:23,765 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 226 transitions. Word has length 109 [2020-07-21 13:17:23,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:23,766 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 226 transitions. [2020-07-21 13:17:23,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 13:17:23,766 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 226 transitions. [2020-07-21 13:17:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-07-21 13:17:23,769 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:23,769 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 13:17:23,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:23,984 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:23,985 INFO L82 PathProgramCache]: Analyzing trace with hash -706406608, now seen corresponding path program 7 times [2020-07-21 13:17:23,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:23,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915240904] [2020-07-21 13:17:23,986 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 13:17:24,087 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:24,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:24,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:17:24,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:24,160 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 13:17:24,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:24,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:24,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:24,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:24,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:24,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:24,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:24,856 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 13:17:24,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915240904] [2020-07-21 13:17:24,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:24,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 13:17:24,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915012329] [2020-07-21 13:17:24,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:17:24,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:24,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:17:24,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:17:24,858 INFO L87 Difference]: Start difference. First operand 107 states and 226 transitions. Second operand 13 states. [2020-07-21 13:17:25,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:25,075 INFO L93 Difference]: Finished difference Result 156 states and 384 transitions. [2020-07-21 13:17:25,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:17:25,076 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-07-21 13:17:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:25,079 INFO L225 Difference]: With dead ends: 156 [2020-07-21 13:17:25,079 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 13:17:25,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 253 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:17:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 13:17:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2020-07-21 13:17:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 13:17:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 226 transitions. [2020-07-21 13:17:25,093 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 226 transitions. Word has length 137 [2020-07-21 13:17:25,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:25,094 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 226 transitions. [2020-07-21 13:17:25,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:17:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 226 transitions. [2020-07-21 13:17:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-21 13:17:25,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:25,097 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 13:17:25,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:25,311 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:25,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1521075862, now seen corresponding path program 8 times [2020-07-21 13:17:25,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:25,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099709932] [2020-07-21 13:17:25,312 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 13:17:25,432 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:25,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:25,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:17:25,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:25,509 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 13:17:25,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:25,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:25,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:25,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:26,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:26,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:26,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:26,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:26,159 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 13:17:26,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099709932] [2020-07-21 13:17:26,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:26,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 13:17:26,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885615795] [2020-07-21 13:17:26,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:17:26,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:26,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:17:26,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:17:26,162 INFO L87 Difference]: Start difference. First operand 107 states and 226 transitions. Second operand 13 states. [2020-07-21 13:17:26,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:26,359 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2020-07-21 13:17:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:17:26,360 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 110 [2020-07-21 13:17:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:26,363 INFO L225 Difference]: With dead ends: 138 [2020-07-21 13:17:26,364 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 13:17:26,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 199 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:17:26,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 13:17:26,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2020-07-21 13:17:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-21 13:17:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 257 transitions. [2020-07-21 13:17:26,386 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 257 transitions. Word has length 110 [2020-07-21 13:17:26,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:26,387 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 257 transitions. [2020-07-21 13:17:26,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:17:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 257 transitions. [2020-07-21 13:17:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 13:17:26,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:26,392 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 13:17:26,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:26,607 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:26,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:26,607 INFO L82 PathProgramCache]: Analyzing trace with hash 989968015, now seen corresponding path program 9 times [2020-07-21 13:17:26,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:26,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424240501] [2020-07-21 13:17:26,608 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 13:17:26,707 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:26,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:26,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 13:17:26,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:26,789 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 13:17:26,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:27,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:27,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:27,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:27,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:27,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:27,606 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 13:17:27,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424240501] [2020-07-21 13:17:27,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:27,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 13:17:27,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422037409] [2020-07-21 13:17:27,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:17:27,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:27,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:17:27,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:17:27,609 INFO L87 Difference]: Start difference. First operand 114 states and 257 transitions. Second operand 15 states. [2020-07-21 13:17:27,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:27,861 INFO L93 Difference]: Finished difference Result 147 states and 340 transitions. [2020-07-21 13:17:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:17:27,862 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 13:17:27,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:27,865 INFO L225 Difference]: With dead ends: 147 [2020-07-21 13:17:27,865 INFO L226 Difference]: Without dead ends: 143 [2020-07-21 13:17:27,866 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 13:17:27,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-21 13:17:27,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 102. [2020-07-21 13:17:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 13:17:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2020-07-21 13:17:27,883 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 121 [2020-07-21 13:17:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:27,883 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2020-07-21 13:17:27,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:17:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2020-07-21 13:17:27,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 13:17:27,889 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:27,889 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 13:17:28,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:28,103 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:28,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash -77183713, now seen corresponding path program 10 times [2020-07-21 13:17:28,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:28,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663224651] [2020-07-21 13:17:28,104 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 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 13:17:28,211 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:28,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:28,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 13:17:28,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:28,271 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 13:17:28,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:28,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:28,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:28,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:28,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:28,776 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 13:17:28,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663224651] [2020-07-21 13:17:28,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:28,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 13:17:28,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101536344] [2020-07-21 13:17:28,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:17:28,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:28,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:17:28,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:17:28,779 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand 13 states. [2020-07-21 13:17:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:28,959 INFO L93 Difference]: Finished difference Result 128 states and 276 transitions. [2020-07-21 13:17:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:17:28,960 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-21 13:17:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:28,963 INFO L225 Difference]: With dead ends: 128 [2020-07-21 13:17:28,963 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 13:17:28,964 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 13:17:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 13:17:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2020-07-21 13:17:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 13:17:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 184 transitions. [2020-07-21 13:17:28,977 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 184 transitions. Word has length 121 [2020-07-21 13:17:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:28,978 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 184 transitions. [2020-07-21 13:17:28,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:17:28,979 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 184 transitions. [2020-07-21 13:17:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 13:17:28,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:28,982 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 13:17:29,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:29,196 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:29,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:29,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1853548191, now seen corresponding path program 11 times [2020-07-21 13:17:29,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:29,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492077708] [2020-07-21 13:17:29,199 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 13:17:29,299 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:29,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:29,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 13:17:29,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:29,402 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 13:17:29,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:29,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:29,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:29,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:30,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:30,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:30,145 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 13:17:30,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492077708] [2020-07-21 13:17:30,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:30,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 13:17:30,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257345396] [2020-07-21 13:17:30,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:17:30,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:30,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:17:30,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:17:30,147 INFO L87 Difference]: Start difference. First operand 94 states and 184 transitions. Second operand 15 states. [2020-07-21 13:17:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:30,385 INFO L93 Difference]: Finished difference Result 126 states and 280 transitions. [2020-07-21 13:17:30,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:17:30,388 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 13:17:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:30,390 INFO L225 Difference]: With dead ends: 126 [2020-07-21 13:17:30,390 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 13:17:30,392 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 13:17:30,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 13:17:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2020-07-21 13:17:30,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 13:17:30,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 147 transitions. [2020-07-21 13:17:30,403 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 147 transitions. Word has length 121 [2020-07-21 13:17:30,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:30,404 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 147 transitions. [2020-07-21 13:17:30,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:17:30,404 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 147 transitions. [2020-07-21 13:17:30,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-21 13:17:30,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:30,406 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 13:17:30,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:30,621 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:30,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:30,622 INFO L82 PathProgramCache]: Analyzing trace with hash 250703466, now seen corresponding path program 1 times [2020-07-21 13:17:30,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:30,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990008524] [2020-07-21 13:17:30,622 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 13:17:30,732 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:30,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:17:30,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:30,803 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 13:17:30,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:31,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:31,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:31,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:31,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:31,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:31,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:31,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:31,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:31,761 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 13:17:31,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990008524] [2020-07-21 13:17:31,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:31,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:17:31,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569874843] [2020-07-21 13:17:31,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:17:31,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:31,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:17:31,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:17:31,763 INFO L87 Difference]: Start difference. First operand 81 states and 147 transitions. Second operand 15 states. [2020-07-21 13:17:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:32,033 INFO L93 Difference]: Finished difference Result 124 states and 266 transitions. [2020-07-21 13:17:32,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:17:32,034 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 110 [2020-07-21 13:17:32,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:32,036 INFO L225 Difference]: With dead ends: 124 [2020-07-21 13:17:32,036 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 13:17:32,038 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 13:17:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 13:17:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-07-21 13:17:32,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 13:17:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-07-21 13:17:32,044 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 110 [2020-07-21 13:17:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:32,044 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-07-21 13:17:32,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:17:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-07-21 13:17:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 13:17:32,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:32,046 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 13:17:32,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:32,261 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:32,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:32,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1905629551, now seen corresponding path program 12 times [2020-07-21 13:17:32,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:32,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293376090] [2020-07-21 13:17:32,263 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 13:17:32,378 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:32,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:32,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 13:17:32,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:32,464 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 13:17:32,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:33,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:33,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:33,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:33,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:33,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:33,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:33,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:33,645 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 13:17:33,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293376090] [2020-07-21 13:17:33,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:33,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 13:17:33,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525690944] [2020-07-21 13:17:33,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:17:33,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:33,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:17:33,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:17:33,648 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 17 states. [2020-07-21 13:17:33,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:33,978 INFO L93 Difference]: Finished difference Result 129 states and 200 transitions. [2020-07-21 13:17:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:17:33,978 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2020-07-21 13:17:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:33,980 INFO L225 Difference]: With dead ends: 129 [2020-07-21 13:17:33,980 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 13:17:33,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 215 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:17:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 13:17:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-21 13:17:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 13:17:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-21 13:17:33,988 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 121 [2020-07-21 13:17:33,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:33,988 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-21 13:17:33,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:17:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-21 13:17:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 13:17:33,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:17:33,990 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 13:17:34,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:34,191 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:17:34,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:17:34,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1847656481, now seen corresponding path program 13 times [2020-07-21 13:17:34,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:17:34,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558482492] [2020-07-21 13:17:34,194 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 13:17:34,317 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:17:34,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:17:34,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 13:17:34,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:34,409 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 13:17:34,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:34,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:34,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:35,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:35,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:35,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:35,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:35,246 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 13:17:35,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558482492] [2020-07-21 13:17:35,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:17:35,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 13:17:35,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147702224] [2020-07-21 13:17:35,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:17:35,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:17:35,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:17:35,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:17:35,248 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 15 states. [2020-07-21 13:17:35,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:17:35,464 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-07-21 13:17:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:17:35,464 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 13:17:35,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:17:35,465 INFO L225 Difference]: With dead ends: 61 [2020-07-21 13:17:35,465 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 13:17:35,466 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 13:17:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 13:17:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 13:17:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 13:17:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 13:17:35,467 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2020-07-21 13:17:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:17:35,468 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 13:17:35,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:17:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 13:17:35,468 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 13:17:35,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:17:35,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 13:17:36,013 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2020-07-21 13:17:37,156 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 35 [2020-07-21 13:17:38,356 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 21 [2020-07-21 13:17:38,660 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-07-21 13:17:38,667 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 13:17:38,668 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:17:38,668 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:17:38,668 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 13:17:38,668 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 13:17:38,668 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 13:17:38,668 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 13:17:38,668 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 13:17:38,668 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 13:17:38,669 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 13:17:38,669 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 13:17:38,669 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 13:17:38,669 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 13:17:38,669 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 13:17:38,669 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 13:17:38,669 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 13:17:38,670 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 13:17:38,670 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 13:17:38,670 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 13:17:38,671 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 13:17:38,671 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 13:17:38,671 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 13:17:38,671 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 13:17:38,671 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 13:17:38,671 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 13:17:38,671 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 13:17:38,672 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 13:17:38,672 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 13:17:38,672 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 13:17:38,672 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 13:17:38,672 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 13:17:38,672 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 13:17:38,672 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 13:17:38,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:17:38 BoogieIcfgContainer [2020-07-21 13:17:38,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:17:38,682 INFO L168 Benchmark]: Toolchain (without parser) took 33706.58 ms. Allocated memory was 145.8 MB in the beginning and 504.4 MB in the end (delta: 358.6 MB). Free memory was 102.5 MB in the beginning and 335.7 MB in the end (delta: -233.2 MB). Peak memory consumption was 354.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:17:38,683 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 13:17:38,684 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.24 ms. Allocated memory is still 145.8 MB. Free memory was 102.1 MB in the beginning and 92.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:17:38,684 INFO L168 Benchmark]: Boogie Preprocessor took 126.74 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 181.6 MB in the end (delta: -89.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 13:17:38,684 INFO L168 Benchmark]: RCFGBuilder took 285.70 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 168.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-07-21 13:17:38,685 INFO L168 Benchmark]: TraceAbstraction took 33038.75 ms. Allocated memory was 202.9 MB in the beginning and 504.4 MB in the end (delta: 301.5 MB). Free memory was 167.6 MB in the beginning and 335.7 MB in the end (delta: -168.1 MB). Peak memory consumption was 362.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:17:38,687 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.24 ms. Allocated memory is still 145.8 MB. Free memory was 102.1 MB in the beginning and 92.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.74 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 181.6 MB in the end (delta: -89.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 285.70 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 168.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 33038.75 ms. Allocated memory was 202.9 MB in the beginning and 504.4 MB in the end (delta: 301.5 MB). Free memory was 167.6 MB in the beginning and 335.7 MB in the end (delta: -168.1 MB). Peak memory consumption was 362.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 29.9s, OverallIterations: 25, TraceHistogramMax: 11, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 707 SDtfs, 785 SDslu, 4765 SDs, 0 SdLazy, 3930 SolverSat, 554 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4445 GetRequests, 3901 SyntacticMatches, 181 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 340 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 134 PreInvPairs, 1204 NumberOfFragments, 102 HoareAnnotationTreeSize, 134 FomulaSimplifications, 3894644 FormulaSimplificationTreeSizeReduction, 2.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 2083 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 16.7s InterpolantComputationTime, 2197 NumberOfCodeBlocks, 2197 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 4319 ConstructedInterpolants, 0 QuantifiedInterpolants, 829261 SizeOfPredicates, 108 NumberOfNonLiveVariables, 4908 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...