/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:27:42,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:27:42,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:27:42,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:27:42,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:27:42,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:27:42,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:27:42,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:27:42,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:27:42,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:27:42,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:27:42,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:27:42,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:27:42,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:27:42,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:27:42,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:27:42,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:27:42,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:27:42,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:27:42,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:27:42,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:27:42,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:27:42,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:27:42,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:27:42,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:27:42,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:27:42,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:27:42,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:27:42,483 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 16:27:42,518 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:27:42,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:27:42,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:27:42,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:27:42,520 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:27:42,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:27:42,521 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:27:42,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:27:42,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:27:42,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:27:42,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:27:42,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:27:42,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:27:42,523 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:27:42,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:27:42,523 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:27:42,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:27:42,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:27:42,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:27:42,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:27:42,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:27:42,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:27:42,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:27:42,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:27:42,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:27:42,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:27:42,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:42,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:27:42,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:27:42,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:27:42,784 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:27:42,804 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:27:42,807 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:27:42,811 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:27:42,811 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:27:42,812 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c [2020-07-20 16:27:42,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6094888d3/12cf22f6ea67460fb4e513c8497c1aca/FLAGf71948b39 [2020-07-20 16:27:43,315 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:27:43,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c [2020-07-20 16:27:43,322 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6094888d3/12cf22f6ea67460fb4e513c8497c1aca/FLAGf71948b39 [2020-07-20 16:27:43,741 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6094888d3/12cf22f6ea67460fb4e513c8497c1aca [2020-07-20 16:27:43,749 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:27:43,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:27:43,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:27:43,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:27:43,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:27:43,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:27:43" (1/1) ... [2020-07-20 16:27:43,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d5ca3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:43, skipping insertion in model container [2020-07-20 16:27:43,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:27:43" (1/1) ... [2020-07-20 16:27:43,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:27:43,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:27:43,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:27:43,961 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:27:43,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:27:44,009 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:27:44,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:44 WrapperNode [2020-07-20 16:27:44,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:27:44,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:27:44,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:27:44,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:27:44,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:44" (1/1) ... [2020-07-20 16:27:44,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:44" (1/1) ... [2020-07-20 16:27:44,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:44" (1/1) ... [2020-07-20 16:27:44,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:44" (1/1) ... [2020-07-20 16:27:44,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:44" (1/1) ... [2020-07-20 16:27:44,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:44" (1/1) ... [2020-07-20 16:27:44,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:44" (1/1) ... [2020-07-20 16:27:44,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:27:44,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:27:44,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:27:44,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:27:44,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:44" (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 16:27:44,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:27:44,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:27:44,220 INFO L138 BoogieDeclarations]: Found implementation of procedure floor_float [2020-07-20 16:27:44,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-20 16:27:44,220 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:27:44,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:27:44,220 INFO L130 BoogieDeclarations]: Found specification of procedure floor_float [2020-07-20 16:27:44,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 16:27:44,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 16:27:44,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 16:27:44,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 16:27:44,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 16:27:44,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 16:27:44,221 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-20 16:27:44,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:27:44,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:27:44,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:27:44,514 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:27:44,515 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-20 16:27:44,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:27:44 BoogieIcfgContainer [2020-07-20 16:27:44,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:27:44,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:27:44,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:27:44,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:27:44,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:27:43" (1/3) ... [2020-07-20 16:27:44,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac535df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:27:44, skipping insertion in model container [2020-07-20 16:27:44,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:44" (2/3) ... [2020-07-20 16:27:44,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac535df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:27:44, skipping insertion in model container [2020-07-20 16:27:44,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:27:44" (3/3) ... [2020-07-20 16:27:44,531 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1052c.c [2020-07-20 16:27:44,544 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:27:44,555 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:27:44,586 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:27:44,613 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:27:44,613 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:27:44,613 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:27:44,614 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:27:44,614 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:27:44,614 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:27:44,614 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:27:44,614 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:27:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-20 16:27:44,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 16:27:44,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:27:44,646 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 16:27:44,646 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:27:44,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:27:44,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2053199230, now seen corresponding path program 1 times [2020-07-20 16:27:44,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:27:44,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212195244] [2020-07-20 16:27:44,658 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 16:27:44,753 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:27:44,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:27:44,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 16:27:44,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:27:44,785 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 16:27:44,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:27:44,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212195244] [2020-07-20 16:27:44,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:27:44,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 16:27:44,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135635188] [2020-07-20 16:27:44,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 16:27:44,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:27:44,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 16:27:44,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 16:27:44,811 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-07-20 16:27:44,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:27:44,838 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2020-07-20 16:27:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 16:27:44,840 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-07-20 16:27:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:27:44,848 INFO L225 Difference]: With dead ends: 78 [2020-07-20 16:27:44,848 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 16:27:44,851 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 16:27:44,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 16:27:44,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 16:27:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 16:27:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-07-20 16:27:44,891 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2020-07-20 16:27:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:27:44,892 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-07-20 16:27:44,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 16:27:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-07-20 16:27:44,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 16:27:44,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:27:44,894 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 16:27:45,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:45,106 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:27:45,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:27:45,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2027240245, now seen corresponding path program 1 times [2020-07-20 16:27:45,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:27:45,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48823645] [2020-07-20 16:27:45,110 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