/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/ldv-regression/stateful_check.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:52:42,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:52:42,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:52:42,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:52:42,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:52:42,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:52:42,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:52:42,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:52:42,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:52:42,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:52:42,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:52:42,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:52:42,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:52:42,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:52:42,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:52:42,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:52:42,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:52:42,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:52:42,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:52:42,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:52:42,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:52:42,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:52:42,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:52:42,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:52:42,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:52:42,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:52:42,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:52:42,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:52:42,484 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 21:52:42,525 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:52:42,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:52:42,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:52:42,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:52:42,532 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:52:42,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:52:42,532 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:52:42,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:52:42,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:52:42,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:52:42,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:52:42,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:52:42,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:52:42,534 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:52:42,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:52:42,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:52:42,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:52:42,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:52:42,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:52:42,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:52:42,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:52:42,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:52:42,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:52:42,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:52:42,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:52:42,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:52:42,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:42,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:52:42,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:52:42,538 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 21:52:42,859 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:52:42,876 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:52:42,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:52:42,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:52:42,886 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:52:42,887 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-07-20 21:52:42,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e4577baf/4cfd22d60b2c4728a1077181f20a78c3/FLAG4e864c73b [2020-07-20 21:52:43,585 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:52:43,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-07-20 21:52:43,593 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e4577baf/4cfd22d60b2c4728a1077181f20a78c3/FLAG4e864c73b [2020-07-20 21:52:43,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e4577baf/4cfd22d60b2c4728a1077181f20a78c3 [2020-07-20 21:52:43,925 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:52:43,929 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:52:43,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:52:43,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:52:43,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:52:43,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:52:43" (1/1) ... [2020-07-20 21:52:43,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd54479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:43, skipping insertion in model container [2020-07-20 21:52:43,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:52:43" (1/1) ... [2020-07-20 21:52:43,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:52:43,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:52:44,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:52:44,202 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:52:44,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:52:44,243 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:52:44,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:44 WrapperNode [2020-07-20 21:52:44,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:52:44,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:52:44,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:52:44,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:52:44,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:44" (1/1) ... [2020-07-20 21:52:44,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:44" (1/1) ... [2020-07-20 21:52:44,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:44" (1/1) ... [2020-07-20 21:52:44,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:44" (1/1) ... [2020-07-20 21:52:44,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:44" (1/1) ... [2020-07-20 21:52:44,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:44" (1/1) ... [2020-07-20 21:52:44,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:44" (1/1) ... [2020-07-20 21:52:44,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:52:44,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:52:44,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:52:44,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:52:44,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:44" (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 21:52:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:52:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:52:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-20 21:52:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-07-20 21:52:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-07-20 21:52:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure check_final_state [2020-07-20 21:52:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_release [2020-07-20 21:52:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_llseek [2020-07-20 21:52:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_read [2020-07-20 21:52:44,504 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_open [2020-07-20 21:52:44,504 INFO L138 BoogieDeclarations]: Found implementation of procedure my_init [2020-07-20 21:52:44,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:52:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:52:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-20 21:52:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:52:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-07-20 21:52:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-07-20 21:52:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure check_final_state [2020-07-20 21:52:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure misc_release [2020-07-20 21:52:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure misc_llseek [2020-07-20 21:52:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure misc_read [2020-07-20 21:52:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure misc_open [2020-07-20 21:52:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure my_init [2020-07-20 21:52:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:52:44,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:52:44,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:52:44,931 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:52:44,931 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 21:52:44,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:52:44 BoogieIcfgContainer [2020-07-20 21:52:44,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:52:44,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:52:44,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:52:44,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:52:44,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:52:43" (1/3) ... [2020-07-20 21:52:44,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67020fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:52:44, skipping insertion in model container [2020-07-20 21:52:44,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:44" (2/3) ... [2020-07-20 21:52:44,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67020fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:52:44, skipping insertion in model container [2020-07-20 21:52:44,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:52:44" (3/3) ... [2020-07-20 21:52:44,947 INFO L109 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-07-20 21:52:44,961 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:52:44,971 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:52:44,984 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:52:45,010 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:52:45,011 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:52:45,011 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:52:45,011 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:52:45,011 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:52:45,012 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:52:45,012 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:52:45,012 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:52:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-07-20 21:52:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 21:52:45,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:52:45,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:52:45,045 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:52:45,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:52:45,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1865767033, now seen corresponding path program 1 times [2020-07-20 21:52:45,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:52:45,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036220225] [2020-07-20 21:52:45,060 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 21:52:45,152 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:52:45,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:52:45,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:52:45,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:52:45,203 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 21:52:45,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:52:45,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036220225] [2020-07-20 21:52:45,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:52:45,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:52:45,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839073204] [2020-07-20 21:52:45,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:52:45,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:52:45,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:52:45,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:52:45,233 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 3 states. [2020-07-20 21:52:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:52:45,336 INFO L93 Difference]: Finished difference Result 174 states and 243 transitions. [2020-07-20 21:52:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:52:45,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 21:52:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:52:45,355 INFO L225 Difference]: With dead ends: 174 [2020-07-20 21:52:45,356 INFO L226 Difference]: Without dead ends: 102 [2020-07-20 21:52:45,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 21:52:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-20 21:52:45,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-07-20 21:52:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-20 21:52:45,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2020-07-20 21:52:45,435 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 16 [2020-07-20 21:52:45,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:52:45,436 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2020-07-20 21:52:45,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:52:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2020-07-20 21:52:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 21:52:45,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:52:45,440 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, 1, 1, 1, 1, 1, 1] [2020-07-20 21:52:45,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:45,656 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:52:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:52:45,658 INFO L82 PathProgramCache]: Analyzing trace with hash -695621135, now seen corresponding path program 1 times [2020-07-20 21:52:45,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:52:45,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822964470] [2020-07-20 21:52:45,659 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 21:52:45,714 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:52:45,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:52:45,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 21:52:45,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:52:45,746 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 21:52:45,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:52:45,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822964470] [2020-07-20 21:52:45,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:52:45,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:52:45,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335302853] [2020-07-20 21:52:45,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:52:45,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:52:45,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:52:45,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:52:45,751 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand 3 states. [2020-07-20 21:52:45,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:52:45,822 INFO L93 Difference]: Finished difference Result 218 states and 297 transitions. [2020-07-20 21:52:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:52:45,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-20 21:52:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:52:45,826 INFO L225 Difference]: With dead ends: 218 [2020-07-20 21:52:45,826 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 21:52:45,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 21:52:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 21:52:45,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-07-20 21:52:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-20 21:52:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 169 transitions. [2020-07-20 21:52:45,854 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 169 transitions. Word has length 29 [2020-07-20 21:52:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:52:45,855 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 169 transitions. [2020-07-20 21:52:45,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:52:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 169 transitions. [2020-07-20 21:52:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 21:52:45,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:52:45,860 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:52:46,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:46,077 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:52:46,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:52:46,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1328709660, now seen corresponding path program 1 times [2020-07-20 21:52:46,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:52:46,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955838715] [2020-07-20 21:52:46,079 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 21:52:46,128 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:52:46,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:52:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:52:46,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:52:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:52:46,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:52:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:52:46,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955838715] [2020-07-20 21:52:46,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:52:46,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-07-20 21:52:46,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340388369] [2020-07-20 21:52:46,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:52:46,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:52:46,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:52:46,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:52:46,232 INFO L87 Difference]: Start difference. First operand 126 states and 169 transitions. Second operand 5 states. [2020-07-20 21:52:46,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:52:46,381 INFO L93 Difference]: Finished difference Result 316 states and 459 transitions. [2020-07-20 21:52:46,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:52:46,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-07-20 21:52:46,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:52:46,386 INFO L225 Difference]: With dead ends: 316 [2020-07-20 21:52:46,386 INFO L226 Difference]: Without dead ends: 201 [2020-07-20 21:52:46,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:52:46,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-20 21:52:46,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 174. [2020-07-20 21:52:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-07-20 21:52:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 249 transitions. [2020-07-20 21:52:46,444 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 249 transitions. Word has length 40 [2020-07-20 21:52:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:52:46,445 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 249 transitions. [2020-07-20 21:52:46,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:52:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 249 transitions. [2020-07-20 21:52:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-20 21:52:46,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:52:46,454 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:52:46,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:46,656 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:52:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:52:46,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1574199465, now seen corresponding path program 1 times [2020-07-20 21:52:46,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:52:46,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362973033] [2020-07-20 21:52:46,659 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 21:52:46,730 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:52:46,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:52:46,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:52:46,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:52:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-20 21:52:46,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:52:46,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362973033] [2020-07-20 21:52:46,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:52:46,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:52:46,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405257848] [2020-07-20 21:52:46,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:52:46,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:52:46,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:52:46,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:52:46,758 INFO L87 Difference]: Start difference. First operand 174 states and 249 transitions. Second operand 3 states. [2020-07-20 21:52:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:52:46,792 INFO L93 Difference]: Finished difference Result 261 states and 372 transitions. [2020-07-20 21:52:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:52:46,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-07-20 21:52:46,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:52:46,795 INFO L225 Difference]: With dead ends: 261 [2020-07-20 21:52:46,795 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 21:52:46,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 21:52:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 21:52:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-07-20 21:52:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 21:52:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-07-20 21:52:46,810 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 63 [2020-07-20 21:52:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:52:46,811 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-07-20 21:52:46,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:52:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-07-20 21:52:46,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-20 21:52:46,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:52:46,813 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:52:47,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:47,028 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:52:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:52:47,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1192820603, now seen corresponding path program 1 times [2020-07-20 21:52:47,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:52:47,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523707857] [2020-07-20 21:52:47,030 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 21:52:47,097 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:52:47,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:52:47,098 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:52:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:52:47,124 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:52:47,159 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:52:47,160 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:52:47,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:47,408 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,409 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,410 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,411 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,411 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,412 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,412 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,413 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,413 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,414 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,414 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,415 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,415 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,416 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 21:52:47,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:52:47 BoogieIcfgContainer [2020-07-20 21:52:47,436 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:52:47,439 INFO L168 Benchmark]: Toolchain (without parser) took 3511.59 ms. Allocated memory was 141.0 MB in the beginning and 235.9 MB in the end (delta: 94.9 MB). Free memory was 102.4 MB in the beginning and 158.5 MB in the end (delta: -56.0 MB). Peak memory consumption was 38.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:47,441 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 141.0 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 21:52:47,442 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.39 ms. Allocated memory is still 141.0 MB. Free memory was 102.2 MB in the beginning and 91.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:47,443 INFO L168 Benchmark]: Boogie Preprocessor took 160.34 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 91.8 MB in the beginning and 182.6 MB in the end (delta: -90.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:47,443 INFO L168 Benchmark]: RCFGBuilder took 531.02 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 163.0 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:47,445 INFO L168 Benchmark]: TraceAbstraction took 2498.84 ms. Allocated memory was 204.5 MB in the beginning and 235.9 MB in the end (delta: 31.5 MB). Free memory was 163.0 MB in the beginning and 158.5 MB in the end (delta: 4.5 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:47,449 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 141.0 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 313.39 ms. Allocated memory is still 141.0 MB. Free memory was 102.2 MB in the beginning and 91.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 160.34 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 91.8 MB in the beginning and 182.6 MB in the end (delta: -90.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 531.02 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 163.0 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2498.84 ms. Allocated memory was 204.5 MB in the beginning and 235.9 MB in the end (delta: 31.5 MB). Free memory was 163.0 MB in the beginning and 158.5 MB in the end (delta: 4.5 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] int ldv_mutex = 1; [L11] int open_called = 0; VAL [\old(ldv_mutex)=5, \old(open_called)=4, ldv_mutex=1, open_called=0] [L74] int ldv_s_misc_fops_file_operations = 0; VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=0, open_called=0] [L75] CALL my_init() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L69] open_called = 0 [L70] return 0; VAL [\old(ldv_mutex)=1, \old(open_called)=0, \result=0, ldv_mutex=1, open_called=0] [L75] RET my_init() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=0, my_init()=0, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=0, open_called=0] [L81] COND TRUE ldv_s_misc_fops_file_operations==0 VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=0, open_called=0] [L82] CALL misc_open() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L57] COND TRUE __VERIFIER_nondet_int() [L59] return 1; VAL [\old(ldv_mutex)=1, \old(open_called)=0, \result=1, ldv_mutex=1, open_called=0] [L82] RET misc_open() VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=0, misc_open()=1, open_called=0] [L83] ldv_s_misc_fops_file_operations++ VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=1, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=1, ldv_mutex=1, ldv_s_misc_fops_file_operations=1, open_called=0] [L89] COND TRUE ldv_s_misc_fops_file_operations==1 VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=1, ldv_mutex=1, ldv_s_misc_fops_file_operations=1, open_called=0] [L90] CALL misc_read() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L52] return 0; VAL [\old(ldv_mutex)=1, \old(open_called)=0, \result=0, ldv_mutex=1, open_called=0] [L90] RET misc_read() VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=1, ldv_mutex=1, ldv_s_misc_fops_file_operations=1, misc_read()=0, open_called=0] [L91] ldv_s_misc_fops_file_operations++ VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=1, ldv_mutex=1, ldv_s_misc_fops_file_operations=2, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=2, ldv_mutex=1, ldv_s_misc_fops_file_operations=2, open_called=0] [L97] COND TRUE ldv_s_misc_fops_file_operations==2 VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=2, ldv_mutex=1, ldv_s_misc_fops_file_operations=2, open_called=0] [L98] CALL misc_llseek() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L48] return 0; VAL [\old(ldv_mutex)=1, \old(open_called)=0, \result=0, ldv_mutex=1, open_called=0] [L98] RET misc_llseek() VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=2, ldv_mutex=1, ldv_s_misc_fops_file_operations=2, misc_llseek()=0, open_called=0] [L99] ldv_s_misc_fops_file_operations++ VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=2, ldv_mutex=1, ldv_s_misc_fops_file_operations=3, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L104] case 3: VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=3, ldv_mutex=1, ldv_s_misc_fops_file_operations=3, open_called=0] [L105] COND TRUE ldv_s_misc_fops_file_operations==3 VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=3, ldv_mutex=1, ldv_s_misc_fops_file_operations=3, open_called=0] [L106] CALL misc_release() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L34] COND FALSE !(\read(open_called)) VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L41] CALL mutex_lock() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L16] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L17] ldv_mutex = 2 VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=2, open_called=0] [L41] RET mutex_lock() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=2, open_called=0] [L42] CALL mutex_lock() VAL [\old(ldv_mutex)=2, \old(open_called)=0, ldv_mutex=2, open_called=0] [L16] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [\old(ldv_mutex)=2, \old(open_called)=0, ldv_mutex=2, open_called=0] [L16] CALL __blast_assert() VAL [\old(ldv_mutex)=2, \old(open_called)=0, ldv_mutex=2, open_called=0] [L4] __VERIFIER_error() VAL [\old(ldv_mutex)=2, \old(open_called)=0, ldv_mutex=2, open_called=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 74 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 308 SDtfs, 156 SDslu, 277 SDs, 0 SdLazy, 56 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 211 NumberOfCodeBlocks, 174 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 183 ConstructedInterpolants, 0 QuantifiedInterpolants, 11751 SizeOfPredicates, 4 NumberOfNonLiveVariables, 304 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 25/31 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 incorrect! Received shutdown request...