/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:45:44,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:45:44,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:45:44,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:45:44,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:45:44,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:45:44,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:45:44,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:45:44,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:45:44,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:45:44,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:45:44,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:45:44,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:45:44,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:45:44,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:45:44,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:45:44,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:45:44,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:45:44,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:45:44,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:45:44,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:45:44,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:45:44,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:45:44,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:45:44,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 15:45:44,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 15:45:44,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 15:45:44,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 15:45:44,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 15:45:44,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 15:45:44,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 15:45:44,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 15:45:44,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 15:45:44,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 15:45:44,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 15:45:44,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 15:45:44,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 15:45:44,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 15:45:44,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:45:44,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:45:44,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:45:44,062 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 15:45:44,080 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:45:44,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:45:44,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:45:44,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:45:44,082 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:45:44,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:45:44,083 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:45:44,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:45:44,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:45:44,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:45:44,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:45:44,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:45:44,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:45:44,084 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:45:44,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:45:44,084 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:45:44,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:45:44,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:45:44,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:45:44,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:45:44,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:45:44,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:44,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:45:44,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:45:44,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:45:44,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:45:44,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:44,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:45:44,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:45:44,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 15:45:44,350 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:45:44,363 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:45:44,366 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:45:44,368 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:45:44,368 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:45:44,369 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_10-2.c [2020-07-21 15:45:44,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d62926c25/f34eb74ed67f460fbc257a5ba68381e5/FLAG90f161d1a [2020-07-21 15:45:44,801 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:45:44,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_10-2.c [2020-07-21 15:45:44,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d62926c25/f34eb74ed67f460fbc257a5ba68381e5/FLAG90f161d1a [2020-07-21 15:45:45,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d62926c25/f34eb74ed67f460fbc257a5ba68381e5 [2020-07-21 15:45:45,210 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:45:45,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:45:45,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:45,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:45:45,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:45:45,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:45" (1/1) ... [2020-07-21 15:45:45,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@367101ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:45, skipping insertion in model container [2020-07-21 15:45:45,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:45" (1/1) ... [2020-07-21 15:45:45,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:45:45,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:45:45,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:45,447 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:45:45,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:45,485 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:45:45,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:45 WrapperNode [2020-07-21 15:45:45,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:45,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:45:45,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:45:45,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:45:45,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:45" (1/1) ... [2020-07-21 15:45:45,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:45" (1/1) ... [2020-07-21 15:45:45,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:45" (1/1) ... [2020-07-21 15:45:45,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:45" (1/1) ... [2020-07-21 15:45:45,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:45" (1/1) ... [2020-07-21 15:45:45,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:45" (1/1) ... [2020-07-21 15:45:45,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:45" (1/1) ... [2020-07-21 15:45:45,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:45:45,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:45:45,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:45:45,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:45:45,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:45" (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 15:45:45,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:45:45,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:45:45,683 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 15:45:45,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:45:45,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:45:45,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:45:45,683 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 15:45:45,683 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:45:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:45:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:45:45,988 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:45:45,988 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:45:45,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:45 BoogieIcfgContainer [2020-07-21 15:45:45,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:45:45,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:45:45,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:45:46,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:45:46,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:45:45" (1/3) ... [2020-07-21 15:45:46,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51704c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:46, skipping insertion in model container [2020-07-21 15:45:46,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:45" (2/3) ... [2020-07-21 15:45:46,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51704c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:46, skipping insertion in model container [2020-07-21 15:45:46,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:45" (3/3) ... [2020-07-21 15:45:46,017 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_10-2.c [2020-07-21 15:45:46,044 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:45:46,058 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:45:46,084 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:45:46,111 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:45:46,111 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:45:46,111 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:45:46,112 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:45:46,112 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:45:46,112 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:45:46,112 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:45:46,112 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:45:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 15:45:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 15:45:46,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:46,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:46,142 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:46,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:46,149 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 15:45:46,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:46,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031413986] [2020-07-21 15:45:46,159 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 15:45:46,232 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:46,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:46,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:45:46,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:46,328 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 15:45:46,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:46,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031413986] [2020-07-21 15:45:46,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:46,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:45:46,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635905276] [2020-07-21 15:45:46,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:45:46,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:46,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:45:46,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:46,351 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 15:45:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:46,448 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 15:45:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:45:46,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 15:45:46,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:46,461 INFO L225 Difference]: With dead ends: 35 [2020-07-21 15:45:46,461 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 15:45:46,465 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 15:45:46,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 15:45:46,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 15:45:46,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 15:45:46,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 15:45:46,512 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 15:45:46,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:46,512 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 15:45:46,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:45:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 15:45:46,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 15:45:46,515 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:46,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:46,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:46,732 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:46,733 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 15:45:46,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:46,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31370472] [2020-07-21 15:45:46,735 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 15:45:46,758 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:46,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:46,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:45:46,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:46,791 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 15:45:46,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:46,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31370472] [2020-07-21 15:45:46,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:46,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:45:46,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126421055] [2020-07-21 15:45:46,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:45:46,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:46,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:45:46,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:46,797 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 15:45:46,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:46,867 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 15:45:46,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:45:46,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 15:45:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:46,870 INFO L225 Difference]: With dead ends: 27 [2020-07-21 15:45:46,870 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 15:45:46,871 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 15:45:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 15:45:46,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 15:45:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 15:45:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 15:45:46,880 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 15:45:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:46,880 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 15:45:46,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:45:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 15:45:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 15:45:46,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:46,882 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:47,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:47,098 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:47,099 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 15:45:47,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:47,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730166575] [2020-07-21 15:45:47,100 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 15:45:47,138 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:47,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:47,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:45:47,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 15:45:47,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:47,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 15:45:47,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730166575] [2020-07-21 15:45:47,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:47,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 15:45:47,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054235309] [2020-07-21 15:45:47,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:45:47,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:47,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:45:47,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:45:47,490 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 15:45:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:47,592 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 15:45:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:47,593 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 15:45:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:47,595 INFO L225 Difference]: With dead ends: 32 [2020-07-21 15:45:47,595 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 15:45:47,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:45:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 15:45:47,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 15:45:47,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 15:45:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 15:45:47,605 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 15:45:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:47,606 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 15:45:47,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:45:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 15:45:47,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 15:45:47,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:47,608 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:47,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:47,823 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:47,824 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 15:45:47,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:47,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074094322] [2020-07-21 15:45:47,825 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 15:45:47,854 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:47,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:47,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:45:47,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 15:45:47,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:48,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 15:45:48,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074094322] [2020-07-21 15:45:48,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:48,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 15:45:48,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850572959] [2020-07-21 15:45:48,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:45:48,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:48,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:45:48,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:45:48,071 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 15:45:48,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:48,154 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 15:45:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:48,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 15:45:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:48,158 INFO L225 Difference]: With dead ends: 37 [2020-07-21 15:45:48,158 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 15:45:48,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:45:48,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 15:45:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 15:45:48,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 15:45:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 15:45:48,168 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 15:45:48,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:48,169 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 15:45:48,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:45:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 15:45:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 15:45:48,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:48,171 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:48,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:48,385 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 15:45:48,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:48,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709002890] [2020-07-21 15:45:48,386 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 15:45:48,427 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:48,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:48,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:45:48,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:45:48,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:48,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:48,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:48,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:48,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 15:45:48,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709002890] [2020-07-21 15:45:48,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:48,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 15:45:48,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957533796] [2020-07-21 15:45:48,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:45:48,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:48,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:45:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:45:48,791 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 15:45:48,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:48,966 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 15:45:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:45:48,967 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 15:45:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:48,969 INFO L225 Difference]: With dead ends: 42 [2020-07-21 15:45:48,969 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 15:45:48,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:45:48,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 15:45:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 15:45:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 15:45:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 15:45:48,982 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 15:45:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:48,982 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 15:45:48,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:45:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 15:45:48,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 15:45:48,984 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:48,985 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:49,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:49,194 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:49,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 15:45:49,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:49,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290267102] [2020-07-21 15:45:49,196 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 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 15:45:49,227 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:49,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:49,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:45:49,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 15:45:49,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:49,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:49,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:49,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 15:45:49,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290267102] [2020-07-21 15:45:49,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:49,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 15:45:49,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741171959] [2020-07-21 15:45:49,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:45:49,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:49,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:45:49,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:45:49,601 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 15:45:49,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:49,718 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 15:45:49,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:45:49,719 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 15:45:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:49,722 INFO L225 Difference]: With dead ends: 47 [2020-07-21 15:45:49,722 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 15:45:49,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:45:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 15:45:49,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 15:45:49,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 15:45:49,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 15:45:49,734 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 15:45:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:49,734 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 15:45:49,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:45:49,735 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 15:45:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 15:45:49,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:49,737 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:49,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:49,942 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:49,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:49,943 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 15:45:49,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:49,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385973569] [2020-07-21 15:45:49,944 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 15:45:49,998 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:49,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:49,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:45:50,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 15:45:50,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:50,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:50,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:50,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:50,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:50,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 15:45:50,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385973569] [2020-07-21 15:45:50,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:50,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 15:45:50,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072515777] [2020-07-21 15:45:50,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 15:45:50,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:50,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 15:45:50,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:45:50,706 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 15:45:50,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:50,875 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 15:45:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:45:50,875 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 15:45:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:50,880 INFO L225 Difference]: With dead ends: 52 [2020-07-21 15:45:50,880 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 15:45:50,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:45:50,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 15:45:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 15:45:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 15:45:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 15:45:50,909 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 15:45:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:50,910 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 15:45:50,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 15:45:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 15:45:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 15:45:50,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:50,916 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:51,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:51,120 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:51,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 15:45:51,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:51,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500511282] [2020-07-21 15:45:51,122 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 15:45:51,167 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:51,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:51,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:45:51,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 171 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-21 15:45:51,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:51,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:52,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:52,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:52,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:52,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:52,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 193 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-07-21 15:45:52,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500511282] [2020-07-21 15:45:52,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:52,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 21 [2020-07-21 15:45:52,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551380142] [2020-07-21 15:45:52,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:45:52,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:52,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:45:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:45:52,497 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 21 states. [2020-07-21 15:45:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:53,047 INFO L93 Difference]: Finished difference Result 94 states and 184 transitions. [2020-07-21 15:45:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 15:45:53,048 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-07-21 15:45:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:53,049 INFO L225 Difference]: With dead ends: 94 [2020-07-21 15:45:53,050 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 15:45:53,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 164 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=981, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 15:45:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 15:45:53,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-07-21 15:45:53,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 15:45:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-07-21 15:45:53,065 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 96 [2020-07-21 15:45:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:53,066 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-07-21 15:45:53,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:45:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-07-21 15:45:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 15:45:53,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:53,068 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:53,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:53,282 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:53,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:53,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 4 times [2020-07-21 15:45:53,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:53,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835249888] [2020-07-21 15:45:53,284 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 15:45:53,337 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:53,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:53,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:45:53,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-21 15:45:53,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:53,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:53,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:53,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-07-21 15:45:53,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835249888] [2020-07-21 15:45:53,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:53,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 15:45:53,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830938984] [2020-07-21 15:45:53,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 15:45:53,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:53,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 15:45:53,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:45:53,922 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 13 states. [2020-07-21 15:45:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:54,050 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-07-21 15:45:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:45:54,051 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-07-21 15:45:54,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:54,053 INFO L225 Difference]: With dead ends: 65 [2020-07-21 15:45:54,053 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 15:45:54,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:45:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 15:45:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-21 15:45:54,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 15:45:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-21 15:45:54,063 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 68 [2020-07-21 15:45:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:54,064 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-21 15:45:54,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 15:45:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-21 15:45:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 15:45:54,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:54,066 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:54,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:54,280 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:54,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2020-07-21 15:45:54,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:54,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736253136] [2020-07-21 15:45:54,281 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 15:45:54,347 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:54,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:54,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:45:54,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-21 15:45:54,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:55,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:55,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:55,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:55,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:55,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-07-21 15:45:55,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736253136] [2020-07-21 15:45:55,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:55,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 15:45:55,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110613272] [2020-07-21 15:45:55,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 15:45:55,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:55,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 15:45:55,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:45:55,323 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 15 states. [2020-07-21 15:45:55,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:55,491 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-07-21 15:45:55,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:45:55,491 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 109 [2020-07-21 15:45:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:55,493 INFO L225 Difference]: With dead ends: 68 [2020-07-21 15:45:55,493 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 15:45:55,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 15:45:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 15:45:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-21 15:45:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 15:45:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-21 15:45:55,502 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 109 [2020-07-21 15:45:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:55,503 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-21 15:45:55,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 15:45:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-21 15:45:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-21 15:45:55,506 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:55,507 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:55,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:55,721 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:55,722 INFO L82 PathProgramCache]: Analyzing trace with hash 706081956, now seen corresponding path program 6 times [2020-07-21 15:45:55,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:55,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575046115] [2020-07-21 15:45:55,723 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 15:45:55,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:55,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:45:55,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 839 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-21 15:45:55,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:57,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:57,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:57,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:57,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:57,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 891 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2020-07-21 15:45:58,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575046115] [2020-07-21 15:45:58,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:58,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 15:45:58,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229462608] [2020-07-21 15:45:58,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 15:45:58,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:58,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 15:45:58,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 15:45:58,437 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 25 states. [2020-07-21 15:45:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:59,196 INFO L93 Difference]: Finished difference Result 144 states and 221 transitions. [2020-07-21 15:45:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 15:45:59,197 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 218 [2020-07-21 15:45:59,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:59,201 INFO L225 Difference]: With dead ends: 144 [2020-07-21 15:45:59,201 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 15:45:59,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 391 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 15:45:59,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 15:45:59,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-07-21 15:45:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 15:45:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2020-07-21 15:45:59,216 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 218 [2020-07-21 15:45:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:59,216 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2020-07-21 15:45:59,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 15:45:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2020-07-21 15:45:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-21 15:45:59,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:59,219 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:59,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:59,427 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:59,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:59,427 INFO L82 PathProgramCache]: Analyzing trace with hash 259499213, now seen corresponding path program 7 times [2020-07-21 15:45:59,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:59,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30716099] [2020-07-21 15:45:59,428 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 15:45:59,538 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:59,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:59,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:45:59,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-07-21 15:45:59,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:00,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:01,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:01,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 573 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2020-07-21 15:46:01,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30716099] [2020-07-21 15:46:01,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:01,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 15:46:01,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247246103] [2020-07-21 15:46:01,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:46:01,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:01,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:46:01,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:46:01,176 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand 17 states. [2020-07-21 15:46:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:01,382 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2020-07-21 15:46:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:46:01,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 177 [2020-07-21 15:46:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:01,385 INFO L225 Difference]: With dead ends: 85 [2020-07-21 15:46:01,385 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 15:46:01,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 326 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:46:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 15:46:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-21 15:46:01,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 15:46:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-07-21 15:46:01,395 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 177 [2020-07-21 15:46:01,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:01,396 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-07-21 15:46:01,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:46:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-07-21 15:46:01,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 15:46:01,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:01,400 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:01,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:01,614 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:01,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 8 times [2020-07-21 15:46:01,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:01,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45863108] [2020-07-21 15:46:01,616 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 15:46:01,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:01,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:01,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:46:01,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2020-07-21 15:46:01,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:03,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:03,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:03,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:04,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:04,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:04,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:04,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:04,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1187 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2020-07-21 15:46:04,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45863108] [2020-07-21 15:46:04,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:04,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 15:46:04,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710894480] [2020-07-21 15:46:04,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 15:46:04,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:04,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 15:46:04,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:46:04,466 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 19 states. [2020-07-21 15:46:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:04,748 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2020-07-21 15:46:04,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:46:04,749 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 286 [2020-07-21 15:46:04,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:04,751 INFO L225 Difference]: With dead ends: 90 [2020-07-21 15:46:04,751 INFO L226 Difference]: Without dead ends: 86 [2020-07-21 15:46:04,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 540 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 15:46:04,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-21 15:46:04,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-07-21 15:46:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-21 15:46:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 120 transitions. [2020-07-21 15:46:04,772 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 120 transitions. Word has length 286 [2020-07-21 15:46:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:04,777 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 120 transitions. [2020-07-21 15:46:04,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 15:46:04,777 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 120 transitions. [2020-07-21 15:46:04,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 15:46:04,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:04,794 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 59, 36, 36, 36, 36, 36, 36, 36, 23, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:05,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:05,010 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:05,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:05,010 INFO L82 PathProgramCache]: Analyzing trace with hash -350328107, now seen corresponding path program 9 times [2020-07-21 15:46:05,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:05,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579636225] [2020-07-21 15:46:05,011 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 15:46:05,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:46:05,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:05,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 15:46:05,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14743 backedges. 7742 proven. 1596 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2020-07-21 15:46:05,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:08,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:08,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:08,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:09,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:09,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:09,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:09,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:09,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:10,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:10,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:10,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:10,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:10,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:10,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:10,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:10,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:10,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14743 backedges. 1220 proven. 3406 refuted. 0 times theorem prover too weak. 10117 trivial. 0 not checked. [2020-07-21 15:46:11,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579636225] [2020-07-21 15:46:11,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:11,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 15:46:11,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725789827] [2020-07-21 15:46:11,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 15:46:11,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:11,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 15:46:11,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:46:11,058 INFO L87 Difference]: Start difference. First operand 86 states and 120 transitions. Second operand 29 states. [2020-07-21 15:46:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:12,348 INFO L93 Difference]: Finished difference Result 187 states and 314 transitions. [2020-07-21 15:46:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 15:46:12,349 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 504 [2020-07-21 15:46:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:12,351 INFO L225 Difference]: With dead ends: 187 [2020-07-21 15:46:12,351 INFO L226 Difference]: Without dead ends: 109 [2020-07-21 15:46:12,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 955 SyntacticMatches, 25 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 15:46:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-07-21 15:46:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-07-21 15:46:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-21 15:46:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 135 transitions. [2020-07-21 15:46:12,364 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 135 transitions. Word has length 504 [2020-07-21 15:46:12,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:12,365 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 135 transitions. [2020-07-21 15:46:12,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 15:46:12,365 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 135 transitions. [2020-07-21 15:46:12,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 15:46:12,369 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:12,369 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:12,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:12,584 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash -229001048, now seen corresponding path program 10 times [2020-07-21 15:46:12,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:12,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45166476] [2020-07-21 15:46:12,586 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 15:46:12,858 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:12,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:12,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:46:12,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2270 refuted. 0 times theorem prover too weak. 9756 trivial. 0 not checked. [2020-07-21 15:46:13,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:15,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:15,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:16,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:16,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:16,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:16,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:16,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:16,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:17,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:17,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:17,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:17,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2347 refuted. 0 times theorem prover too weak. 9679 trivial. 0 not checked. [2020-07-21 15:46:17,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45166476] [2020-07-21 15:46:17,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:17,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 15:46:17,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061977488] [2020-07-21 15:46:17,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:46:17,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:17,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:46:17,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:46:17,240 INFO L87 Difference]: Start difference. First operand 98 states and 135 transitions. Second operand 21 states. [2020-07-21 15:46:17,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:17,572 INFO L93 Difference]: Finished difference Result 107 states and 153 transitions. [2020-07-21 15:46:17,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 15:46:17,573 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 463 [2020-07-21 15:46:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:17,576 INFO L225 Difference]: With dead ends: 107 [2020-07-21 15:46:17,576 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 15:46:17,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 890 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:46:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 15:46:17,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-07-21 15:46:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-21 15:46:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 149 transitions. [2020-07-21 15:46:17,586 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 149 transitions. Word has length 463 [2020-07-21 15:46:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:17,587 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 149 transitions. [2020-07-21 15:46:17,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:46:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 149 transitions. [2020-07-21 15:46:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 995 [2020-07-21 15:46:17,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:17,612 INFO L422 BasicCegarLoop]: trace histogram [145, 145, 117, 72, 72, 72, 72, 72, 72, 72, 45, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:17,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:17,813 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:17,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:17,814 INFO L82 PathProgramCache]: Analyzing trace with hash -928557949, now seen corresponding path program 11 times [2020-07-21 15:46:17,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:17,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574330840] [2020-07-21 15:46:17,815 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 15:46:18,191 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:46:18,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:18,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1485 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 15:46:18,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 58770 backedges. 29376 proven. 4650 refuted. 0 times theorem prover too weak. 24744 trivial. 0 not checked. [2020-07-21 15:46:18,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:24,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:24,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:25,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:26,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:26,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:26,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:26,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:26,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:26,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:28,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:28,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:28,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:28,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:29,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:29,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:29,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:29,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:29,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:29,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 58770 backedges. 2815 proven. 9221 refuted. 0 times theorem prover too weak. 46734 trivial. 0 not checked. [2020-07-21 15:46:30,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574330840] [2020-07-21 15:46:30,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:30,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 33] total 37 [2020-07-21 15:46:30,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579740886] [2020-07-21 15:46:30,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-21 15:46:30,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:30,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-21 15:46:30,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 15:46:30,048 INFO L87 Difference]: Start difference. First operand 103 states and 149 transitions. Second operand 37 states. [2020-07-21 15:46:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:32,012 INFO L93 Difference]: Finished difference Result 257 states and 498 transitions. [2020-07-21 15:46:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-21 15:46:32,013 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 994 [2020-07-21 15:46:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:32,016 INFO L225 Difference]: With dead ends: 257 [2020-07-21 15:46:32,016 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 15:46:32,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2023 GetRequests, 1923 SyntacticMatches, 29 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1231, Invalid=4025, Unknown=0, NotChecked=0, Total=5256 [2020-07-21 15:46:32,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 15:46:32,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 129. [2020-07-21 15:46:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-21 15:46:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 186 transitions. [2020-07-21 15:46:32,031 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 186 transitions. Word has length 994 [2020-07-21 15:46:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:32,032 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 186 transitions. [2020-07-21 15:46:32,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-21 15:46:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 186 transitions. [2020-07-21 15:46:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-07-21 15:46:32,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:32,039 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:32,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:32,244 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:32,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:32,245 INFO L82 PathProgramCache]: Analyzing trace with hash -127293739, now seen corresponding path program 12 times [2020-07-21 15:46:32,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:32,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622910170] [2020-07-21 15:46:32,246 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 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 15:46:32,727 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:32,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:32,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 15:46:32,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 659 proven. 4380 refuted. 0 times theorem prover too weak. 28057 trivial. 0 not checked. [2020-07-21 15:46:33,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:36,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:37,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:38,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:39,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:39,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:39,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:39,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:39,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:39,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:39,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 659 proven. 4480 refuted. 0 times theorem prover too weak. 27957 trivial. 0 not checked. [2020-07-21 15:46:39,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622910170] [2020-07-21 15:46:39,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:39,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 15:46:39,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041396517] [2020-07-21 15:46:39,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 15:46:39,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:39,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 15:46:39,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 15:46:39,936 INFO L87 Difference]: Start difference. First operand 129 states and 186 transitions. Second operand 22 states. [2020-07-21 15:46:40,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:40,226 INFO L93 Difference]: Finished difference Result 136 states and 198 transitions. [2020-07-21 15:46:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 15:46:40,227 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 749 [2020-07-21 15:46:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:40,230 INFO L225 Difference]: With dead ends: 136 [2020-07-21 15:46:40,230 INFO L226 Difference]: Without dead ends: 132 [2020-07-21 15:46:40,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1506 GetRequests, 1458 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 15:46:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-21 15:46:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-07-21 15:46:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-21 15:46:40,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 194 transitions. [2020-07-21 15:46:40,241 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 194 transitions. Word has length 749 [2020-07-21 15:46:40,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:40,244 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 194 transitions. [2020-07-21 15:46:40,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 15:46:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 194 transitions. [2020-07-21 15:46:40,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2020-07-21 15:46:40,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:40,257 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:40,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:40,472 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:40,473 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 13 times [2020-07-21 15:46:40,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:40,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965627761] [2020-07-21 15:46:40,473 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 15:46:41,137 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:41,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:41,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 711 conjunts are in the unsatisfiable core [2020-07-21 15:46:41,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2020-07-21 15:46:42,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:47:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2020-07-21 15:47:04,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965627761] [2020-07-21 15:47:04,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:47:04,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 40 [2020-07-21 15:47:04,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589166675] [2020-07-21 15:47:04,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-21 15:47:04,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:47:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-21 15:47:04,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 15:47:04,968 INFO L87 Difference]: Start difference. First operand 132 states and 194 transitions. Second operand 40 states. [2020-07-21 15:47:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:47:05,846 INFO L93 Difference]: Finished difference Result 153 states and 240 transitions. [2020-07-21 15:47:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 15:47:05,847 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1212 [2020-07-21 15:47:05,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:47:05,852 INFO L225 Difference]: With dead ends: 153 [2020-07-21 15:47:05,852 INFO L226 Difference]: Without dead ends: 149 [2020-07-21 15:47:05,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2423 GetRequests, 2339 SyntacticMatches, 46 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 15:47:05,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-07-21 15:47:05,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2020-07-21 15:47:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-21 15:47:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 223 transitions. [2020-07-21 15:47:05,864 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 223 transitions. Word has length 1212 [2020-07-21 15:47:05,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:47:05,866 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 223 transitions. [2020-07-21 15:47:05,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-21 15:47:05,866 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 223 transitions. [2020-07-21 15:47:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2207 [2020-07-21 15:47:05,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:47:05,906 INFO L422 BasicCegarLoop]: trace histogram [323, 323, 261, 161, 161, 161, 161, 161, 161, 161, 100, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:47:06,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:06,119 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:47:06,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:47:06,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1410440460, now seen corresponding path program 14 times [2020-07-21 15:47:06,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:47:06,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597312328] [2020-07-21 15:47:06,121 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 15:47:06,956 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:47:06,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:47:06,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 3291 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 15:47:06,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:47:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 293462 backedges. 123819 proven. 3818 refuted. 0 times theorem prover too weak. 165825 trivial. 0 not checked. [2020-07-21 15:47:08,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:47:21,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:21,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:21,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:21,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:21,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:21,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:24,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:24,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:25,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:25,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:25,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:25,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:25,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:26,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:26,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:26,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 293462 backedges. 4185 proven. 23185 refuted. 0 times theorem prover too weak. 266092 trivial. 0 not checked. [2020-07-21 15:47:28,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597312328] [2020-07-21 15:47:28,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:47:28,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 33 [2020-07-21 15:47:28,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515841025] [2020-07-21 15:47:28,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 15:47:28,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:47:28,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 15:47:28,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 15:47:28,099 INFO L87 Difference]: Start difference. First operand 142 states and 223 transitions. Second operand 33 states. [2020-07-21 15:47:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:47:29,305 INFO L93 Difference]: Finished difference Result 290 states and 482 transitions. [2020-07-21 15:47:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 15:47:29,307 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 2206 [2020-07-21 15:47:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:47:29,309 INFO L225 Difference]: With dead ends: 290 [2020-07-21 15:47:29,310 INFO L226 Difference]: Without dead ends: 156 [2020-07-21 15:47:29,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4432 GetRequests, 4351 SyntacticMatches, 29 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=724, Invalid=2138, Unknown=0, NotChecked=0, Total=2862 [2020-07-21 15:47:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-21 15:47:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 122. [2020-07-21 15:47:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-21 15:47:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 188 transitions. [2020-07-21 15:47:29,323 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 188 transitions. Word has length 2206 [2020-07-21 15:47:29,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:47:29,323 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 188 transitions. [2020-07-21 15:47:29,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 15:47:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 188 transitions. [2020-07-21 15:47:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1499 [2020-07-21 15:47:29,342 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:47:29,342 INFO L422 BasicCegarLoop]: trace histogram [219, 219, 177, 109, 109, 109, 109, 109, 109, 109, 68, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:47:29,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:29,557 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:47:29,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:47:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1905168074, now seen corresponding path program 15 times [2020-07-21 15:47:29,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:47:29,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217968808] [2020-07-21 15:47:29,558 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 15:47:30,245 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:47:30,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:47:30,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 2237 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-21 15:47:30,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:47:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 134604 backedges. 7045 proven. 14191 refuted. 0 times theorem prover too weak. 113368 trivial. 0 not checked. [2020-07-21 15:47:31,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:47:37,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:39,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:39,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:39,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:39,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:40,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:40,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:40,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:40,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:40,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:40,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:41,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:41,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:41,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:44,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:46,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:47,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:47,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:47,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:47,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:48,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:48,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:48,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:48,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:48,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:48,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:48,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 134604 backedges. 7045 proven. 14391 refuted. 0 times theorem prover too weak. 113168 trivial. 0 not checked. [2020-07-21 15:47:49,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217968808] [2020-07-21 15:47:49,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:47:49,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 39] total 41 [2020-07-21 15:47:49,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509428550] [2020-07-21 15:47:49,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-21 15:47:49,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:47:49,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-21 15:47:49,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 15:47:49,463 INFO L87 Difference]: Start difference. First operand 122 states and 188 transitions. Second operand 41 states. [2020-07-21 15:47:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:47:51,966 INFO L93 Difference]: Finished difference Result 275 states and 502 transitions. [2020-07-21 15:47:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-21 15:47:51,968 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 1498 [2020-07-21 15:47:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:47:51,971 INFO L225 Difference]: With dead ends: 275 [2020-07-21 15:47:51,971 INFO L226 Difference]: Without dead ends: 161 [2020-07-21 15:47:51,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3036 GetRequests, 2919 SyntacticMatches, 37 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1563, Invalid=5079, Unknown=0, NotChecked=0, Total=6642 [2020-07-21 15:47:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-07-21 15:47:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2020-07-21 15:47:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 15:47:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 238 transitions. [2020-07-21 15:47:51,988 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 238 transitions. Word has length 1498 [2020-07-21 15:47:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:47:51,989 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 238 transitions. [2020-07-21 15:47:51,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-21 15:47:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 238 transitions. [2020-07-21 15:47:52,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1499 [2020-07-21 15:47:52,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:47:52,008 INFO L422 BasicCegarLoop]: trace histogram [219, 219, 177, 109, 109, 109, 109, 109, 109, 109, 68, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:47:52,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:52,222 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:47:52,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:47:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash -918806966, now seen corresponding path program 16 times [2020-07-21 15:47:52,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:47:52,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320720111] [2020-07-21 15:47:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:47:52,995 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:47:52,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:47:53,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2235 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-21 15:47:53,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:47:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 134604 backedges. 62853 proven. 7454 refuted. 0 times theorem prover too weak. 64297 trivial. 0 not checked. [2020-07-21 15:47:54,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:02,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:03,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:03,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:03,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:03,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:03,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:04,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:04,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:08,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:09,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:09,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:10,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:10,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:11,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:11,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:11,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:11,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:12,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:12,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 134604 backedges. 6010 proven. 13838 refuted. 0 times theorem prover too weak. 114756 trivial. 0 not checked. [2020-07-21 15:48:13,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320720111] [2020-07-21 15:48:13,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:13,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 35] total 37 [2020-07-21 15:48:13,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700906260] [2020-07-21 15:48:13,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-21 15:48:13,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:13,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-21 15:48:13,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 15:48:13,081 INFO L87 Difference]: Start difference. First operand 154 states and 238 transitions. Second operand 37 states. [2020-07-21 15:48:15,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:15,034 INFO L93 Difference]: Finished difference Result 318 states and 509 transitions. [2020-07-21 15:48:15,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 15:48:15,036 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 1498 [2020-07-21 15:48:15,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:15,039 INFO L225 Difference]: With dead ends: 318 [2020-07-21 15:48:15,040 INFO L226 Difference]: Without dead ends: 172 [2020-07-21 15:48:15,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3019 GetRequests, 2927 SyntacticMatches, 33 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=909, Invalid=2751, Unknown=0, NotChecked=0, Total=3660 [2020-07-21 15:48:15,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-21 15:48:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2020-07-21 15:48:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-21 15:48:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 197 transitions. [2020-07-21 15:48:15,060 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 197 transitions. Word has length 1498 [2020-07-21 15:48:15,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:15,061 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 197 transitions. [2020-07-21 15:48:15,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-21 15:48:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 197 transitions. [2020-07-21 15:48:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1676 [2020-07-21 15:48:15,085 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:15,086 INFO L422 BasicCegarLoop]: trace histogram [245, 245, 198, 122, 122, 122, 122, 122, 122, 122, 76, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:15,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:15,301 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:15,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1947361163, now seen corresponding path program 17 times [2020-07-21 15:48:15,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:15,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946384094] [2020-07-21 15:48:15,303 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 15:48:16,206 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:48:16,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:16,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 2499 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-21 15:48:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 168587 backedges. 9826 proven. 14112 refuted. 0 times theorem prover too weak. 144649 trivial. 0 not checked. [2020-07-21 15:48:17,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:24,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:24,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:25,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:25,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:26,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:26,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:26,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:26,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:26,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:26,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:33,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:33,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:36,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:38,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:38,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:39,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:39,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:40,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:40,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:40,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:41,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:41,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:41,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 168587 backedges. 9826 proven. 14315 refuted. 0 times theorem prover too weak. 144446 trivial. 0 not checked. [2020-07-21 15:48:42,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946384094] [2020-07-21 15:48:42,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:42,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 39] total 41 [2020-07-21 15:48:42,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767146789] [2020-07-21 15:48:42,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-21 15:48:42,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:42,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-21 15:48:42,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 15:48:42,596 INFO L87 Difference]: Start difference. First operand 130 states and 197 transitions. Second operand 41 states. [2020-07-21 15:48:44,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:44,775 INFO L93 Difference]: Finished difference Result 279 states and 438 transitions. [2020-07-21 15:48:44,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 15:48:44,778 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 1675 [2020-07-21 15:48:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:44,782 INFO L225 Difference]: With dead ends: 279 [2020-07-21 15:48:44,782 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 15:48:44,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3376 GetRequests, 3273 SyntacticMatches, 37 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1115, Invalid=3441, Unknown=0, NotChecked=0, Total=4556 [2020-07-21 15:48:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 15:48:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 134. [2020-07-21 15:48:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 15:48:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 204 transitions. [2020-07-21 15:48:44,803 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 204 transitions. Word has length 1675 [2020-07-21 15:48:44,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:44,804 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 204 transitions. [2020-07-21 15:48:44,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-21 15:48:44,804 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 204 transitions. [2020-07-21 15:48:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2425 [2020-07-21 15:48:44,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:44,851 INFO L422 BasicCegarLoop]: trace histogram [355, 355, 287, 177, 177, 177, 177, 177, 177, 177, 110, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:45,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:45,066 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:45,068 INFO L82 PathProgramCache]: Analyzing trace with hash 222700524, now seen corresponding path program 18 times [2020-07-21 15:48:45,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:45,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151214887] [2020-07-21 15:48:45,069 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 15:48:46,227 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:48:46,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:46,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 3616 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-21 15:48:46,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 354685 backedges. 12810 proven. 26340 refuted. 0 times theorem prover too weak. 315535 trivial. 0 not checked. [2020-07-21 15:48:48,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:01,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:01,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:05,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:07,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:09,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:10,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:10,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:11,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:11,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:11,663 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 15:49:11,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:11,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:12,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:12,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:12,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:21,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:21,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:25,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:25,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:27,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:28,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:28,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:29,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:30,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:30,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:30,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:30,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:30,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:30,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:30,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 354685 backedges. 12810 proven. 26592 refuted. 0 times theorem prover too weak. 315283 trivial. 0 not checked. [2020-07-21 15:49:33,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151214887] [2020-07-21 15:49:33,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:49:33,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 43] total 45 [2020-07-21 15:49:33,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633097456] [2020-07-21 15:49:33,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-21 15:49:33,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:33,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-21 15:49:33,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1673, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 15:49:33,664 INFO L87 Difference]: Start difference. First operand 134 states and 204 transitions. Second operand 45 states. [2020-07-21 15:49:38,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:38,140 INFO L93 Difference]: Finished difference Result 300 states and 521 transitions. [2020-07-21 15:49:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-21 15:49:38,143 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 2424 [2020-07-21 15:49:38,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:38,147 INFO L225 Difference]: With dead ends: 300 [2020-07-21 15:49:38,148 INFO L226 Difference]: Without dead ends: 174 [2020-07-21 15:49:38,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4893 GetRequests, 4763 SyntacticMatches, 41 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1899, Invalid=6291, Unknown=0, NotChecked=0, Total=8190 [2020-07-21 15:49:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-07-21 15:49:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 140. [2020-07-21 15:49:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-21 15:49:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 212 transitions. [2020-07-21 15:49:38,165 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 212 transitions. Word has length 2424 [2020-07-21 15:49:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:38,167 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 212 transitions. [2020-07-21 15:49:38,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-21 15:49:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 212 transitions. [2020-07-21 15:49:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1962 [2020-07-21 15:49:38,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:38,200 INFO L422 BasicCegarLoop]: trace histogram [287, 287, 232, 143, 143, 143, 143, 143, 143, 143, 89, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:38,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:38,414 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:38,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1868832152, now seen corresponding path program 19 times [2020-07-21 15:49:38,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:38,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817157325] [2020-07-21 15:49:38,417 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 15:49:39,750 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:49:39,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:39,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 4355 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 15:49:39,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 231572 backedges. 2252 proven. 14852 refuted. 0 times theorem prover too weak. 214468 trivial. 0 not checked. [2020-07-21 15:49:41,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:46,101 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:49:46,210 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:49:46,317 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 15:49:46,423 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 15:49:46,545 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 15:49:46,649 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 15:49:56,580 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:49:57,520 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:49:57,626 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:49:57,738 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:49:57,849 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:49:58,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:58,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:06,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:06,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:11,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:11,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:14,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:14,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:15,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:15,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:17,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:17,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:17,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:18,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:18,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:18,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:18,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 231572 backedges. 2252 proven. 15007 refuted. 0 times theorem prover too weak. 214313 trivial. 0 not checked. [2020-07-21 15:50:20,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817157325] [2020-07-21 15:50:20,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:50:20,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 26 [2020-07-21 15:50:20,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845894933] [2020-07-21 15:50:20,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 15:50:20,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:50:20,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 15:50:20,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2020-07-21 15:50:20,362 INFO L87 Difference]: Start difference. First operand 140 states and 212 transitions. Second operand 26 states. [2020-07-21 15:50:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:50:21,285 INFO L93 Difference]: Finished difference Result 140 states and 212 transitions. [2020-07-21 15:50:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 15:50:21,290 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 1961 [2020-07-21 15:50:21,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:50:21,292 INFO L225 Difference]: With dead ends: 140 [2020-07-21 15:50:21,293 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 15:50:21,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3932 GetRequests, 3874 SyntacticMatches, 23 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 15:50:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 15:50:21,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 15:50:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 15:50:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 15:50:21,296 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1961 [2020-07-21 15:50:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:50:21,296 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 15:50:21,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 15:50:21,296 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 15:50:21,297 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 15:50:21,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:50:21,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 15:50:21,832 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 54 [2020-07-21 15:50:25,281 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 200 DAG size of output: 57 [2020-07-21 15:50:25,509 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 1 [2020-07-21 15:50:26,146 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 8 [2020-07-21 15:50:26,152 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 15:50:26,153 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:50:26,153 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:50:26,153 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 15:50:26,153 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 15:50:26,153 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 15:50:26,153 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-07-21 15:50:26,153 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-07-21 15:50:26,154 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-21 15:50:26,154 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-21 15:50:26,154 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 10) (<= 10 main_~x~0)) [2020-07-21 15:50:26,154 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-07-21 15:50:26,154 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-21 15:50:26,154 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-07-21 15:50:26,154 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-07-21 15:50:26,155 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-07-21 15:50:26,155 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-07-21 15:50:26,155 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (<= 2 |fibo_#in~n|)) [2020-07-21 15:50:26,155 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-21 15:50:26,155 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (= |fibo_#t~ret0| 1)) (.cse1 (<= fibo_~n |fibo_#in~n|)) (.cse2 (<= |fibo_#in~n| fibo_~n))) (or (and .cse0 .cse1 .cse2 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)) (and (<= |fibo_#in~n| 6) .cse1 .cse2 (= 5 |fibo_#t~ret0|) (<= 6 |fibo_#in~n|)) (and .cse1 .cse2 (<= 11 fibo_~n)) (and (= 13 |fibo_#t~ret0|) .cse2 (<= fibo_~n 8) (<= 8 |fibo_#in~n|)) (and .cse1 (<= 9 fibo_~n) (<= |fibo_#in~n| 9) (= 21 |fibo_#t~ret0|)) (and (<= 5 |fibo_#in~n|) .cse1 .cse2 (<= |fibo_#in~n| 5) (= |fibo_#t~ret0| 3)) (and .cse2 (<= fibo_~n 10) (= |fibo_#t~ret0| 34) (<= 10 |fibo_#in~n|)) (and (<= 4 |fibo_#in~n|) (= |fibo_#t~ret0| 2) .cse2 (<= fibo_~n 4)) (and .cse2 (<= fibo_~n 7) (<= 7 |fibo_#in~n|) (= |fibo_#t~ret0| 8)) (and .cse0 .cse1 (<= |fibo_#in~n| 2) .cse2 (<= 2 |fibo_#in~n|)))) [2020-07-21 15:50:26,155 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-07-21 15:50:26,156 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-07-21 15:50:26,156 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-07-21 15:50:26,156 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-07-21 15:50:26,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:50:26 BoogieIcfgContainer [2020-07-21 15:50:26,163 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:50:26,165 INFO L168 Benchmark]: Toolchain (without parser) took 280953.96 ms. Allocated memory was 138.4 MB in the beginning and 2.7 GB in the end (delta: 2.6 GB). Free memory was 102.3 MB in the beginning and 1.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2020-07-21 15:50:26,166 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 15:50:26,166 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.34 ms. Allocated memory is still 138.4 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 15:50:26,167 INFO L168 Benchmark]: Boogie Preprocessor took 35.59 ms. Allocated memory is still 138.4 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 15:50:26,167 INFO L168 Benchmark]: RCFGBuilder took 473.70 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 91.1 MB in the beginning and 171.2 MB in the end (delta: -80.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 15:50:26,168 INFO L168 Benchmark]: TraceAbstraction took 280164.06 ms. Allocated memory was 203.4 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 171.2 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2020-07-21 15:50:26,170 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.34 ms. Allocated memory is still 138.4 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.59 ms. Allocated memory is still 138.4 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 473.70 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 91.1 MB in the beginning and 171.2 MB in the end (delta: -80.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 280164.06 ms. Allocated memory was 203.4 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 171.2 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 275.4s, OverallIterations: 24, TraceHistogramMax: 355, AutomataDifference: 21.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 727 SDtfs, 4549 SDslu, 4682 SDs, 0 SdLazy, 7666 SolverSat, 7145 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33012 GetRequests, 31750 SyntacticMatches, 441 SemanticMatches, 821 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10655 ImplicationChecksByTransitivity, 20.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 24 MinimizatonAttempts, 246 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 596 PreInvPairs, 725 NumberOfFragments, 162 HoareAnnotationTreeSize, 596 FomulaSimplifications, 6460 FormulaSimplificationTreeSizeReduction, 1.6s HoareSimplificationTime, 8 FomulaSimplificationsInter, 8982 FormulaSimplificationTreeSizeReductionInter, 2.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 239.9s InterpolantComputationTime, 16363 NumberOfCodeBlocks, 10807 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 32653 ConstructedInterpolants, 0 QuantifiedInterpolants, 63988327 SizeOfPredicates, 228 NumberOfNonLiveVariables, 28265 ConjunctsInSsa, 1149 ConjunctsInUnsatCore, 46 InterpolantComputations, 2 PerfectInterpolantSequences, 2784344/3069122 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...