/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/float-newlib/float_req_bl_1092b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:07:45,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:07:45,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:07:45,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:07:45,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:07:45,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:07:45,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:07:45,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:07:45,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:07:45,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:07:45,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:07:45,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:07:45,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:07:45,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:07:45,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:07:45,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:07:45,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:07:45,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:07:45,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:07:45,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:07:45,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:07:45,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:07:45,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:07:45,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:07:45,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:07:45,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:07:45,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:07:45,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:07:45,989 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 21:07:46,023 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:07:46,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:07:46,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:07:46,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:07:46,028 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:07:46,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:07:46,028 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:07:46,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:07:46,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:07:46,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:07:46,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:07:46,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:07:46,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:07:46,030 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:07:46,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:07:46,030 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:07:46,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:07:46,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:07:46,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:07:46,031 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:07:46,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:07:46,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:07:46,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:07:46,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:07:46,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:07:46,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:07:46,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:46,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:07:46,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:07:46,033 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 21:07:46,301 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:07:46,323 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:07:46,326 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:07:46,330 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:07:46,331 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:07:46,332 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1092b.c [2020-07-20 21:07:46,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa68ebe55/2e544b981a7e48cfad20d33e088ad8d4/FLAG700922fd4 [2020-07-20 21:07:46,883 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:07:46,884 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1092b.c [2020-07-20 21:07:46,893 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa68ebe55/2e544b981a7e48cfad20d33e088ad8d4/FLAG700922fd4 [2020-07-20 21:07:47,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa68ebe55/2e544b981a7e48cfad20d33e088ad8d4 [2020-07-20 21:07:47,247 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:07:47,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:07:47,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:07:47,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:07:47,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:07:47,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:47" (1/1) ... [2020-07-20 21:07:47,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76573965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47, skipping insertion in model container [2020-07-20 21:07:47,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:47" (1/1) ... [2020-07-20 21:07:47,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:07:47,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:07:47,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:07:47,476 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:07:47,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:07:47,616 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:07:47,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47 WrapperNode [2020-07-20 21:07:47,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:07:47,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:07:47,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:07:47,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:07:47,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ... [2020-07-20 21:07:47,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ... [2020-07-20 21:07:47,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ... [2020-07-20 21:07:47,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ... [2020-07-20 21:07:47,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ... [2020-07-20 21:07:47,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ... [2020-07-20 21:07:47,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ... [2020-07-20 21:07:47,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:07:47,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:07:47,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:07:47,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:07:47,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (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 21:07:47,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:07:47,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:07:47,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ceil_float [2020-07-20 21:07:47,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-20 21:07:47,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:07:47,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:07:47,728 INFO L130 BoogieDeclarations]: Found specification of procedure ceil_float [2020-07-20 21:07:47,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 21:07:47,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 21:07:47,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 21:07:47,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:07:47,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 21:07:47,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 21:07:47,729 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-20 21:07:47,729 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:07:47,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:07:47,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:07:48,076 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:07:48,077 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-20 21:07:48,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:48 BoogieIcfgContainer [2020-07-20 21:07:48,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:07:48,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:07:48,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:07:48,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:07:48,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:07:47" (1/3) ... [2020-07-20 21:07:48,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e02c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:48, skipping insertion in model container [2020-07-20 21:07:48,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (2/3) ... [2020-07-20 21:07:48,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e02c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:48, skipping insertion in model container [2020-07-20 21:07:48,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:48" (3/3) ... [2020-07-20 21:07:48,090 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1092b.c [2020-07-20 21:07:48,101 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:07:48,110 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:07:48,125 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:07:48,150 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:07:48,150 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:07:48,150 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:07:48,150 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:07:48,151 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:07:48,151 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:07:48,151 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:07:48,151 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:07:48,178 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-20 21:07:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 21:07:48,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:07:48,185 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 21:07:48,186 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:07:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:07:48,192 INFO L82 PathProgramCache]: Analyzing trace with hash 263185431, now seen corresponding path program 1 times [2020-07-20 21:07:48,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:07:48,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901504668] [2020-07-20 21:07:48,201 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 21:07:48,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:07:48,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:07:48,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 21:07:48,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:07:48,355 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 21:07:48,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:07:48,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901504668] [2020-07-20 21:07:48,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:07:48,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 21:07:48,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167031894] [2020-07-20 21:07:48,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 21:07:48,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:07:48,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 21:07:48,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 21:07:48,382 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-07-20 21:07:48,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:07:48,408 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2020-07-20 21:07:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 21:07:48,409 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-07-20 21:07:48,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:07:48,419 INFO L225 Difference]: With dead ends: 78 [2020-07-20 21:07:48,420 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 21:07:48,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 21:07:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 21:07:48,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 21:07:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 21:07:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-07-20 21:07:48,466 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2020-07-20 21:07:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:07:48,467 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-07-20 21:07:48,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 21:07:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-07-20 21:07:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:07:48,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:07:48,469 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 21:07:48,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:48,683 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:07:48,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:07:48,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1491196875, now seen corresponding path program 1 times [2020-07-20 21:07:48,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:07:48,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409673132] [2020-07-20 21:07:48,685 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 21:07:48,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:07:48,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:07:48,750 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.