/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:49:39,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:49:39,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:49:39,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:49:39,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:49:39,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:49:39,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:49:39,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:49:39,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:49:39,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:49:39,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:49:39,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:49:39,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:49:39,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:49:39,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:49:39,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:49:39,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:49:39,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:49:39,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:49:39,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:49:39,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:49:39,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:49:39,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:49:39,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:49:39,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 21:49:39,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 21:49:39,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 21:49:39,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 21:49:39,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 21:49:39,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 21:49:39,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 21:49:39,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 21:49:39,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 21:49:39,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 21:49:39,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 21:49:39,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 21:49:39,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 21:49:39,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 21:49:39,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:49:39,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:49:39,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:49:39,321 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:49:39,357 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:49:39,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:49:39,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:49:39,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:49:39,363 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:49:39,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:49:39,364 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:49:39,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:49:39,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:49:39,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:49:39,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:49:39,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:49:39,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:49:39,367 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:49:39,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:49:39,368 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:49:39,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:49:39,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:49:39,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:49:39,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:49:39,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:49:39,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:49:39,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:49:39,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:49:39,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:49:39,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:49:39,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:39,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:49:39,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:49:39,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:49:39,676 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:49:39,690 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:49:39,694 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:49:39,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:49:39,697 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:49:39,698 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-07-20 21:49:39,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82d78dc2/f4b0795fc28c40cbad7c9ef7f0c8d8cd/FLAG8de20a630 [2020-07-20 21:49:40,335 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:49:40,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c [2020-07-20 21:49:40,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82d78dc2/f4b0795fc28c40cbad7c9ef7f0c8d8cd/FLAG8de20a630 [2020-07-20 21:49:40,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82d78dc2/f4b0795fc28c40cbad7c9ef7f0c8d8cd [2020-07-20 21:49:40,692 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:49:40,694 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:49:40,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:49:40,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:49:40,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:49:40,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:40" (1/1) ... [2020-07-20 21:49:40,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19eb74fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:40, skipping insertion in model container [2020-07-20 21:49:40,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:40" (1/1) ... [2020-07-20 21:49:40,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:49:40,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:49:40,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:49:40,987 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:49:41,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:49:41,031 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:49:41,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41 WrapperNode [2020-07-20 21:49:41,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:49:41,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:49:41,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:49:41,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:49:41,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ... [2020-07-20 21:49:41,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ... [2020-07-20 21:49:41,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ... [2020-07-20 21:49:41,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ... [2020-07-20 21:49:41,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ... [2020-07-20 21:49:41,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ... [2020-07-20 21:49:41,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ... [2020-07-20 21:49:41,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:49:41,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:49:41,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:49:41,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:49:41,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:49:41,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:49:41,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:49:41,243 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:49:41,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:49:41,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:49:41,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:49:41,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:49:41,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:49:41,545 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:49:41,545 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 21:49:41,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:41 BoogieIcfgContainer [2020-07-20 21:49:41,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:49:41,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:49:41,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:49:41,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:49:41,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:49:40" (1/3) ... [2020-07-20 21:49:41,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aafc6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:41, skipping insertion in model container [2020-07-20 21:49:41,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (2/3) ... [2020-07-20 21:49:41,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aafc6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:41, skipping insertion in model container [2020-07-20 21:49:41,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:41" (3/3) ... [2020-07-20 21:49:41,566 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-07-20 21:49:41,584 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:49:41,594 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:49:41,616 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:49:41,655 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:49:41,655 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:49:41,655 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:49:41,655 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:49:41,656 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:49:41,656 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:49:41,656 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:49:41,657 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:49:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-20 21:49:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 21:49:41,691 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:41,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:41,693 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:41,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:41,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-07-20 21:49:41,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:41,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259527886] [2020-07-20 21:49:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:41,816 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:41,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:41,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:41,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:41,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:41,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259527886] [2020-07-20 21:49:41,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:41,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:41,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121060607] [2020-07-20 21:49:41,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:41,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:41,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:41,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:41,896 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-07-20 21:49:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:41,960 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-07-20 21:49:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:41,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 21:49:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:41,982 INFO L225 Difference]: With dead ends: 69 [2020-07-20 21:49:41,982 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 21:49:41,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 21:49:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-07-20 21:49:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 21:49:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-07-20 21:49:42,045 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-07-20 21:49:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:42,046 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-07-20 21:49:42,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-07-20 21:49:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 21:49:42,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:42,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:42,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:42,264 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:42,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:42,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-07-20 21:49:42,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:42,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928207769] [2020-07-20 21:49:42,267 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:42,324 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:42,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:42,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:42,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:42,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928207769] [2020-07-20 21:49:42,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:42,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:42,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601969313] [2020-07-20 21:49:42,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:42,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:42,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:42,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:42,350 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-07-20 21:49:42,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:42,386 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-07-20 21:49:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:42,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 21:49:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:42,390 INFO L225 Difference]: With dead ends: 87 [2020-07-20 21:49:42,390 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 21:49:42,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 21:49:42,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-07-20 21:49:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 21:49:42,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-07-20 21:49:42,403 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-07-20 21:49:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:42,404 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-07-20 21:49:42,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:42,404 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-07-20 21:49:42,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 21:49:42,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:42,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:42,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:42,619 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:42,620 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-07-20 21:49:42,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:42,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150148609] [2020-07-20 21:49:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:42,688 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:42,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:42,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:42,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:42,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150148609] [2020-07-20 21:49:42,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:42,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:42,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835692211] [2020-07-20 21:49:42,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:42,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:42,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:42,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:42,712 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-07-20 21:49:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:42,736 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-07-20 21:49:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:42,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 21:49:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:42,739 INFO L225 Difference]: With dead ends: 81 [2020-07-20 21:49:42,739 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 21:49:42,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 21:49:42,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-07-20 21:49:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 21:49:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-07-20 21:49:42,758 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-07-20 21:49:42,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:42,759 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-07-20 21:49:42,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-07-20 21:49:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 21:49:42,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:42,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:42,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:42,977 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-07-20 21:49:42,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:42,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964189279] [2020-07-20 21:49:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:43,023 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:43,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:43,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:43,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:43,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:43,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964189279] [2020-07-20 21:49:43,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:43,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:43,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925254015] [2020-07-20 21:49:43,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:43,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:43,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:43,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:43,051 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-07-20 21:49:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:43,082 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-07-20 21:49:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:43,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 21:49:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:43,085 INFO L225 Difference]: With dead ends: 100 [2020-07-20 21:49:43,086 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 21:49:43,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 21:49:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-07-20 21:49:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 21:49:43,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-07-20 21:49:43,099 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-07-20 21:49:43,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:43,099 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-07-20 21:49:43,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:43,100 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-07-20 21:49:43,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 21:49:43,101 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:43,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:43,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:43,317 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:43,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:43,318 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-07-20 21:49:43,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:43,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337762684] [2020-07-20 21:49:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:43,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:43,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:43,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:43,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:43,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:43,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337762684] [2020-07-20 21:49:43,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:43,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:43,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655724657] [2020-07-20 21:49:43,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:43,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:43,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:43,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:43,375 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-07-20 21:49:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:43,408 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-07-20 21:49:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:43,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 21:49:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:43,425 INFO L225 Difference]: With dead ends: 164 [2020-07-20 21:49:43,425 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 21:49:43,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 21:49:43,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-07-20 21:49:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 21:49:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-07-20 21:49:43,448 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-07-20 21:49:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:43,448 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-07-20 21:49:43,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-07-20 21:49:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:49:43,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:43,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:43,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:43,666 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:43,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:43,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-07-20 21:49:43,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:43,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80317654] [2020-07-20 21:49:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:43,716 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:43,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:43,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:43,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:43,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:43,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80317654] [2020-07-20 21:49:43,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:43,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:43,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465224649] [2020-07-20 21:49:43,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:43,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:43,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:43,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:43,747 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-07-20 21:49:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:43,783 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-07-20 21:49:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:43,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 21:49:43,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:43,785 INFO L225 Difference]: With dead ends: 147 [2020-07-20 21:49:43,785 INFO L226 Difference]: Without dead ends: 102 [2020-07-20 21:49:43,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-20 21:49:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-07-20 21:49:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-20 21:49:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-07-20 21:49:43,814 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-07-20 21:49:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:43,814 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-07-20 21:49:43,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-07-20 21:49:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:49:43,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:43,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:44,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:44,033 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:44,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:44,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-07-20 21:49:44,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:44,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995949189] [2020-07-20 21:49:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:44,080 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:44,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:44,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:44,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:44,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:44,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995949189] [2020-07-20 21:49:44,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:44,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:44,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100892771] [2020-07-20 21:49:44,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:44,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:44,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:44,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:44,105 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-07-20 21:49:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:44,128 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-07-20 21:49:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:44,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 21:49:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:44,130 INFO L225 Difference]: With dead ends: 180 [2020-07-20 21:49:44,130 INFO L226 Difference]: Without dead ends: 178 [2020-07-20 21:49:44,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-20 21:49:44,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-07-20 21:49:44,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 21:49:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-07-20 21:49:44,145 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-07-20 21:49:44,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:44,145 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-07-20 21:49:44,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-07-20 21:49:44,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:49:44,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:44,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:44,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:44,363 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:44,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-07-20 21:49:44,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:44,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245162645] [2020-07-20 21:49:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:44,398 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:44,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:44,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:44,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:44,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:44,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245162645] [2020-07-20 21:49:44,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:44,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:44,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968111242] [2020-07-20 21:49:44,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:44,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:44,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:44,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:44,411 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-07-20 21:49:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:44,443 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-07-20 21:49:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:44,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 21:49:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:44,446 INFO L225 Difference]: With dead ends: 312 [2020-07-20 21:49:44,446 INFO L226 Difference]: Without dead ends: 186 [2020-07-20 21:49:44,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:44,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-07-20 21:49:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-07-20 21:49:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-20 21:49:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-07-20 21:49:44,462 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-07-20 21:49:44,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:44,463 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-07-20 21:49:44,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-07-20 21:49:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:49:44,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:44,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:44,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:44,681 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:44,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:44,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-07-20 21:49:44,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:44,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2628704] [2020-07-20 21:49:44,684 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:44,713 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:44,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:44,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:44,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:44,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:44,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2628704] [2020-07-20 21:49:44,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:44,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:44,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784747982] [2020-07-20 21:49:44,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:44,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:44,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:44,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:44,735 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-07-20 21:49:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:44,764 INFO L93 Difference]: Finished difference Result 328 states and 524 transitions. [2020-07-20 21:49:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:44,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 21:49:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:44,768 INFO L225 Difference]: With dead ends: 328 [2020-07-20 21:49:44,771 INFO L226 Difference]: Without dead ends: 326 [2020-07-20 21:49:44,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-07-20 21:49:44,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 260. [2020-07-20 21:49:44,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-20 21:49:44,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 402 transitions. [2020-07-20 21:49:44,814 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 402 transitions. Word has length 20 [2020-07-20 21:49:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:44,814 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 402 transitions. [2020-07-20 21:49:44,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:44,814 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 402 transitions. [2020-07-20 21:49:44,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:49:44,825 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:44,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:45,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:45,027 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:45,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:45,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1197665575, now seen corresponding path program 1 times [2020-07-20 21:49:45,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:45,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348423831] [2020-07-20 21:49:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:45,074 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:45,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:45,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:45,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:45,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:45,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348423831] [2020-07-20 21:49:45,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:45,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:45,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508619645] [2020-07-20 21:49:45,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:45,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:45,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:45,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:45,090 INFO L87 Difference]: Start difference. First operand 260 states and 402 transitions. Second operand 3 states. [2020-07-20 21:49:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:45,112 INFO L93 Difference]: Finished difference Result 388 states and 596 transitions. [2020-07-20 21:49:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:45,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 21:49:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:45,115 INFO L225 Difference]: With dead ends: 388 [2020-07-20 21:49:45,115 INFO L226 Difference]: Without dead ends: 266 [2020-07-20 21:49:45,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-07-20 21:49:45,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-07-20 21:49:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-07-20 21:49:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-07-20 21:49:45,128 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-07-20 21:49:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:45,128 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-07-20 21:49:45,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-07-20 21:49:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:49:45,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:45,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:45,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:45,345 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:45,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:45,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-07-20 21:49:45,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:45,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442325954] [2020-07-20 21:49:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:45,376 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:45,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:45,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:45,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:45,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:45,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442325954] [2020-07-20 21:49:45,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:45,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:45,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074227916] [2020-07-20 21:49:45,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:45,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:45,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:45,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:45,392 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-07-20 21:49:45,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:45,424 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-07-20 21:49:45,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:45,425 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 21:49:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:45,428 INFO L225 Difference]: With dead ends: 604 [2020-07-20 21:49:45,428 INFO L226 Difference]: Without dead ends: 354 [2020-07-20 21:49:45,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:45,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-07-20 21:49:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-07-20 21:49:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-07-20 21:49:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-07-20 21:49:45,457 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-07-20 21:49:45,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:45,457 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-07-20 21:49:45,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-07-20 21:49:45,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 21:49:45,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:45,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:45,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:45,674 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:45,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-07-20 21:49:45,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:45,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722884010] [2020-07-20 21:49:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:45,704 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:45,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:45,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:45,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:45,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:45,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722884010] [2020-07-20 21:49:45,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:45,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:45,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715968371] [2020-07-20 21:49:45,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:45,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:45,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:45,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:45,720 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-07-20 21:49:45,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:45,754 INFO L93 Difference]: Finished difference Result 612 states and 912 transitions. [2020-07-20 21:49:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:45,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 21:49:45,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:45,759 INFO L225 Difference]: With dead ends: 612 [2020-07-20 21:49:45,759 INFO L226 Difference]: Without dead ends: 610 [2020-07-20 21:49:45,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:45,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-07-20 21:49:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 512. [2020-07-20 21:49:45,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-07-20 21:49:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 734 transitions. [2020-07-20 21:49:45,780 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 734 transitions. Word has length 21 [2020-07-20 21:49:45,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:45,781 INFO L479 AbstractCegarLoop]: Abstraction has 512 states and 734 transitions. [2020-07-20 21:49:45,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 734 transitions. [2020-07-20 21:49:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 21:49:45,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:45,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:45,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:45,997 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:45,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:45,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1932183682, now seen corresponding path program 1 times [2020-07-20 21:49:45,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:45,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357393955] [2020-07-20 21:49:46,000 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,033 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:46,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:46,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:46,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:46,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357393955] [2020-07-20 21:49:46,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:46,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:46,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253936512] [2020-07-20 21:49:46,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:46,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:46,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:46,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,046 INFO L87 Difference]: Start difference. First operand 512 states and 734 transitions. Second operand 3 states. [2020-07-20 21:49:46,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:46,079 INFO L93 Difference]: Finished difference Result 1172 states and 1680 transitions. [2020-07-20 21:49:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:46,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 21:49:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:46,085 INFO L225 Difference]: With dead ends: 1172 [2020-07-20 21:49:46,085 INFO L226 Difference]: Without dead ends: 674 [2020-07-20 21:49:46,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2020-07-20 21:49:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2020-07-20 21:49:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2020-07-20 21:49:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 934 transitions. [2020-07-20 21:49:46,130 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 934 transitions. Word has length 21 [2020-07-20 21:49:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:46,130 INFO L479 AbstractCegarLoop]: Abstraction has 672 states and 934 transitions. [2020-07-20 21:49:46,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 934 transitions. [2020-07-20 21:49:46,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:49:46,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:46,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:46,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,346 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:46,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:46,347 INFO L82 PathProgramCache]: Analyzing trace with hash -932696864, now seen corresponding path program 1 times [2020-07-20 21:49:46,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:46,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973543724] [2020-07-20 21:49:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:46,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:46,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:46,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:46,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973543724] [2020-07-20 21:49:46,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:46,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:46,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288969831] [2020-07-20 21:49:46,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:46,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:46,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:46,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,416 INFO L87 Difference]: Start difference. First operand 672 states and 934 transitions. Second operand 3 states. [2020-07-20 21:49:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:46,461 INFO L93 Difference]: Finished difference Result 1140 states and 1592 transitions. [2020-07-20 21:49:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:46,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 21:49:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:46,471 INFO L225 Difference]: With dead ends: 1140 [2020-07-20 21:49:46,472 INFO L226 Difference]: Without dead ends: 1138 [2020-07-20 21:49:46,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2020-07-20 21:49:46,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1008. [2020-07-20 21:49:46,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1008 states. [2020-07-20 21:49:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1366 transitions. [2020-07-20 21:49:46,522 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1366 transitions. Word has length 22 [2020-07-20 21:49:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:46,523 INFO L479 AbstractCegarLoop]: Abstraction has 1008 states and 1366 transitions. [2020-07-20 21:49:46,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1366 transitions. [2020-07-20 21:49:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:49:46,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:46,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:46,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,741 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:46,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:46,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1325723874, now seen corresponding path program 1 times [2020-07-20 21:49:46,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:46,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650278288] [2020-07-20 21:49:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,788 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:46,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:46,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:46,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:46,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:46,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650278288] [2020-07-20 21:49:46,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:46,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:46,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745977028] [2020-07-20 21:49:46,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:46,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:46,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:46,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,817 INFO L87 Difference]: Start difference. First operand 1008 states and 1366 transitions. Second operand 3 states. [2020-07-20 21:49:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:46,872 INFO L93 Difference]: Finished difference Result 2292 states and 3096 transitions. [2020-07-20 21:49:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:46,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 21:49:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:46,881 INFO L225 Difference]: With dead ends: 2292 [2020-07-20 21:49:46,882 INFO L226 Difference]: Without dead ends: 1298 [2020-07-20 21:49:46,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2020-07-20 21:49:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1296. [2020-07-20 21:49:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1296 states. [2020-07-20 21:49:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1686 transitions. [2020-07-20 21:49:46,942 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1686 transitions. Word has length 22 [2020-07-20 21:49:46,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:46,943 INFO L479 AbstractCegarLoop]: Abstraction has 1296 states and 1686 transitions. [2020-07-20 21:49:46,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:46,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1686 transitions. [2020-07-20 21:49:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 21:49:46,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:46,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:47,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,162 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:47,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1151384345, now seen corresponding path program 1 times [2020-07-20 21:49:47,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:47,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573000455] [2020-07-20 21:49:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,203 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:47,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:47,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:47,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:47,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573000455] [2020-07-20 21:49:47,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:47,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:47,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422918567] [2020-07-20 21:49:47,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:47,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:47,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:47,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:47,227 INFO L87 Difference]: Start difference. First operand 1296 states and 1686 transitions. Second operand 3 states. [2020-07-20 21:49:47,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:47,288 INFO L93 Difference]: Finished difference Result 2130 states and 2743 transitions. [2020-07-20 21:49:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:47,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 21:49:47,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:47,301 INFO L225 Difference]: With dead ends: 2130 [2020-07-20 21:49:47,302 INFO L226 Difference]: Without dead ends: 2128 [2020-07-20 21:49:47,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2020-07-20 21:49:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 2000. [2020-07-20 21:49:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2000 states. [2020-07-20 21:49:47,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2550 transitions. [2020-07-20 21:49:47,380 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2550 transitions. Word has length 23 [2020-07-20 21:49:47,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:47,381 INFO L479 AbstractCegarLoop]: Abstraction has 2000 states and 2550 transitions. [2020-07-20 21:49:47,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:47,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2550 transitions. [2020-07-20 21:49:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 21:49:47,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:47,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:47,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,603 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:47,603 INFO L82 PathProgramCache]: Analyzing trace with hash 758357335, now seen corresponding path program 1 times [2020-07-20 21:49:47,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:47,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212814852] [2020-07-20 21:49:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,635 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:47,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:47,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:47,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:47,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:47,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212814852] [2020-07-20 21:49:47,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:47,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:47,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847127316] [2020-07-20 21:49:47,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:47,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:47,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:47,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:47,657 INFO L87 Difference]: Start difference. First operand 2000 states and 2550 transitions. Second operand 3 states. [2020-07-20 21:49:47,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:47,723 INFO L93 Difference]: Finished difference Result 4496 states and 5686 transitions. [2020-07-20 21:49:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:47,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 21:49:47,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:47,724 INFO L225 Difference]: With dead ends: 4496 [2020-07-20 21:49:47,725 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:49:47,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:49:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:49:47,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:49:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:49:47,734 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-07-20 21:49:47,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:47,735 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:49:47,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:47,735 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:49:47,735 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:49:47,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:49:48,035 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 21:49:48,035 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:49:48,035 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:49:48,035 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:49:48,036 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:49:48,036 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:49:48,036 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-07-20 21:49:48,036 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-07-20 21:49:48,036 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 21:49:48,036 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-07-20 21:49:48,036 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-07-20 21:49:48,036 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-07-20 21:49:48,037 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-07-20 21:49:48,037 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-07-20 21:49:48,037 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 21:49:48,037 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-07-20 21:49:48,037 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 21:49:48,037 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 21:49:48,038 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-07-20 21:49:48,038 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 21:49:48,038 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-07-20 21:49:48,038 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 21:49:48,038 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 21:49:48,038 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-07-20 21:49:48,038 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-07-20 21:49:48,040 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-07-20 21:49:48,040 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 21:49:48,040 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 21:49:48,040 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 21:49:48,040 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-07-20 21:49:48,040 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 21:49:48,041 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-07-20 21:49:48,041 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-07-20 21:49:48,041 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-07-20 21:49:48,041 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 21:49:48,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:49:48 BoogieIcfgContainer [2020-07-20 21:49:48,057 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:49:48,060 INFO L168 Benchmark]: Toolchain (without parser) took 7365.74 ms. Allocated memory was 137.4 MB in the beginning and 250.1 MB in the end (delta: 112.7 MB). Free memory was 102.1 MB in the beginning and 217.1 MB in the end (delta: -115.0 MB). Peak memory consumption was 123.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:48,061 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 21:49:48,062 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.67 ms. Allocated memory is still 137.4 MB. Free memory was 101.7 MB in the beginning and 91.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:48,063 INFO L168 Benchmark]: Boogie Preprocessor took 137.74 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 91.5 MB in the beginning and 178.5 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:48,063 INFO L168 Benchmark]: RCFGBuilder took 382.11 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 162.0 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:48,068 INFO L168 Benchmark]: TraceAbstraction took 6502.68 ms. Allocated memory was 201.3 MB in the beginning and 250.1 MB in the end (delta: 48.8 MB). Free memory was 161.3 MB in the beginning and 217.1 MB in the end (delta: -55.8 MB). Peak memory consumption was 119.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:48,071 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 336.67 ms. Allocated memory is still 137.4 MB. Free memory was 101.7 MB in the beginning and 91.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.74 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 91.5 MB in the beginning and 178.5 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 382.11 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 162.0 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6502.68 ms. Allocated memory was 201.3 MB in the beginning and 250.1 MB in the end (delta: 48.8 MB). Free memory was 161.3 MB in the beginning and 217.1 MB in the end (delta: -55.8 MB). Peak memory consumption was 119.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: 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 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.3s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1049 SDtfs, 481 SDslu, 712 SDs, 0 SdLazy, 92 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 320 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2000occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 524 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 337 NumberOfCodeBlocks, 227 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 320 ConstructedInterpolants, 0 QuantifiedInterpolants, 11208 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1230 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 0/0 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...