/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 BIGGEST_EQUIVALENCE_CLASS --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_1052a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:31:03,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:31:03,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:31:03,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 00:31:03,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:31:03,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:31:03,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:31:03,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:31:03,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:31:03,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:31:03,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:31:03,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:31:03,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:31:03,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:31:03,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:31:03,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:31:03,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:31:03,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:31:03,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:31:03,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:31:03,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:31:03,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:31:03,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:31:03,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:31:03,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:31:03,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 00:31:03,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 00:31:03,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 00:31:03,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 00:31:03,605 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:31:03,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:31:03,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:31:03,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:31:03,607 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:31:03,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:31:03,607 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:31:03,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:31:03,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:31:03,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:31:03,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:31:03,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:31:03,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:31:03,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:31:03,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:31:03,610 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:31:03,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:31:03,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:31:03,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:31:03,611 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:31:03,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:31:03,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:31:03,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:31:03,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:31:03,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:31:03,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:31:03,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:03,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:31:03,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:31:03,613 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 00:31:03,885 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:31:03,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:31:03,910 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:31:03,912 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:31:03,914 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:31:03,914 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052a.c [2020-07-21 00:31:03,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d6c6cb35/22851647f28a4f2c8ba5c270e023c594/FLAGa587b4b0d [2020-07-21 00:31:04,460 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:31:04,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1052a.c [2020-07-21 00:31:04,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d6c6cb35/22851647f28a4f2c8ba5c270e023c594/FLAGa587b4b0d [2020-07-21 00:31:04,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d6c6cb35/22851647f28a4f2c8ba5c270e023c594 [2020-07-21 00:31:04,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:31:04,810 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:31:04,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:04,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:31:04,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:31:04,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:04" (1/1) ... [2020-07-21 00:31:04,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1183248c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:04, skipping insertion in model container [2020-07-21 00:31:04,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:04" (1/1) ... [2020-07-21 00:31:04,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:31:04,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:31:05,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:05,044 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:31:05,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:05,190 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:31:05,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:05 WrapperNode [2020-07-21 00:31:05,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:05,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:31:05,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:31:05,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:31:05,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:05" (1/1) ... [2020-07-21 00:31:05,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:05" (1/1) ... [2020-07-21 00:31:05,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:05" (1/1) ... [2020-07-21 00:31:05,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:05" (1/1) ... [2020-07-21 00:31:05,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:05" (1/1) ... [2020-07-21 00:31:05,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:05" (1/1) ... [2020-07-21 00:31:05,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:05" (1/1) ... [2020-07-21 00:31:05,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:31:05,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:31:05,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:31:05,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:31:05,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:31:05,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:31:05,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:31:05,302 INFO L138 BoogieDeclarations]: Found implementation of procedure floor_float [2020-07-21 00:31:05,302 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-07-21 00:31:05,303 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:31:05,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:31:05,303 INFO L130 BoogieDeclarations]: Found specification of procedure floor_float [2020-07-21 00:31:05,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 00:31:05,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 00:31:05,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 00:31:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 00:31:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 00:31:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 00:31:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-07-21 00:31:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:31:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:31:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:31:05,595 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:31:05,595 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-21 00:31:05,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:05 BoogieIcfgContainer [2020-07-21 00:31:05,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:31:05,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:31:05,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:31:05,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:31:05,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:31:04" (1/3) ... [2020-07-21 00:31:05,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284a6bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:05, skipping insertion in model container [2020-07-21 00:31:05,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:05" (2/3) ... [2020-07-21 00:31:05,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284a6bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:05, skipping insertion in model container [2020-07-21 00:31:05,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:05" (3/3) ... [2020-07-21 00:31:05,610 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1052a.c [2020-07-21 00:31:05,621 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:31:05,629 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:31:05,644 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:31:05,671 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:31:05,672 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:31:05,672 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:31:05,672 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:31:05,672 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:31:05,672 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:31:05,673 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:31:05,673 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:31:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-07-21 00:31:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 00:31:05,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:05,701 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] [2020-07-21 00:31:05,702 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:05,708 INFO L82 PathProgramCache]: Analyzing trace with hash -305625155, now seen corresponding path program 1 times [2020-07-21 00:31:05,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:05,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475492786] [2020-07-21 00:31:05,724 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 [2020-07-21 00:31:05,817 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:05,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:05,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 00:31:05,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:31:05,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:05,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475492786] [2020-07-21 00:31:05,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:05,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 00:31:05,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77343434] [2020-07-21 00:31:05,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 00:31:05,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:05,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 00:31:05,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 00:31:05,899 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2020-07-21 00:31:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:05,929 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2020-07-21 00:31:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 00:31:05,930 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2020-07-21 00:31:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:05,940 INFO L225 Difference]: With dead ends: 76 [2020-07-21 00:31:05,941 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 00:31:05,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 00:31:05,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 00:31:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-21 00:31:05,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 00:31:05,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-21 00:31:05,992 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 24 [2020-07-21 00:31:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:05,992 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-21 00:31:05,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 00:31:05,993 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-21 00:31:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 00:31:05,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:05,994 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] [2020-07-21 00:31:06,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:06,211 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:06,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:06,212 INFO L82 PathProgramCache]: Analyzing trace with hash -231212118, now seen corresponding path program 1 times [2020-07-21 00:31:06,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:06,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406462971] [2020-07-21 00:31:06,214 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 [2020-07-21 00:31:06,348 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:06,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 00:31:06,349 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.