/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:44:54,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:44:54,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:44:54,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:44:54,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:44:54,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:44:54,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:44:54,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:44:54,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:44:54,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:44:54,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:44:54,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:44:54,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:44:54,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:44:54,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:44:54,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:44:54,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:44:54,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:44:54,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:44:54,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:44:54,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:44:54,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:44:54,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:44:54,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:44:54,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:44:54,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:44:54,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:44:54,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:44:54,689 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 15:44:54,705 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:44:54,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:44:54,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:44:54,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:44:54,707 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:44:54,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:44:54,707 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:44:54,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:44:54,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:44:54,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:44:54,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:44:54,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:44:54,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:44:54,708 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:44:54,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:44:54,709 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:44:54,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:44:54,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:44:54,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:44:54,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:44:54,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:44:54,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:44:54,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:44:54,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:44:54,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:44:54,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:44:54,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:54,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:44:54,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:44:54,712 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 -> 2 [2020-07-21 15:44:55,001 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:44:55,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:44:55,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:44:55,019 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:44:55,019 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:44:55,020 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-07-21 15:44:55,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/971523f40/9e97e60b739f4918b6b9f26cae6a3cc9/FLAG6227cc036 [2020-07-21 15:44:55,549 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:44:55,550 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-07-21 15:44:55,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/971523f40/9e97e60b739f4918b6b9f26cae6a3cc9/FLAG6227cc036 [2020-07-21 15:44:55,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/971523f40/9e97e60b739f4918b6b9f26cae6a3cc9 [2020-07-21 15:44:55,932 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:44:55,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:44:55,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:44:55,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:44:55,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:44:55,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:44:55" (1/1) ... [2020-07-21 15:44:55,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7098db54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:55, skipping insertion in model container [2020-07-21 15:44:55,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:44:55" (1/1) ... [2020-07-21 15:44:55,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:44:55,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:44:56,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:44:56,204 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:44:56,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:44:56,381 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:44:56,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56 WrapperNode [2020-07-21 15:44:56,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:44:56,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:44:56,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:44:56,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:44:56,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:44:56,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:44:56,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:44:56,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:44:56,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (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 15:44:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:44:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:44:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 15:44:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-21 15:44:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-21 15:44:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-21 15:44:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:44:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:44:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 15:44:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 15:44:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 15:44:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-21 15:44:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-21 15:44:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-21 15:44:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:44:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:44:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:44:57,105 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:44:57,105 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 15:44:57,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:44:57 BoogieIcfgContainer [2020-07-21 15:44:57,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:44:57,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:44:57,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:44:57,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:44:57,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:44:55" (1/3) ... [2020-07-21 15:44:57,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c0d618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:44:57, skipping insertion in model container [2020-07-21 15:44:57,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (2/3) ... [2020-07-21 15:44:57,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c0d618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:44:57, skipping insertion in model container [2020-07-21 15:44:57,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:44:57" (3/3) ... [2020-07-21 15:44:57,118 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-07-21 15:44:57,129 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:44:57,135 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:44:57,149 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:44:57,172 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:44:57,173 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:44:57,173 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:44:57,173 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:44:57,173 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:44:57,173 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:44:57,173 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:44:57,174 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:44:57,191 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-07-21 15:44:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 15:44:57,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:57,201 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 15:44:57,201 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:57,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1312098946, now seen corresponding path program 1 times [2020-07-21 15:44:57,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:57,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133376559] [2020-07-21 15:44:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:44:57,413 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:44:57,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:57,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 15:44:57,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 15:44:57,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:44:57,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133376559] [2020-07-21 15:44:57,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:44:57,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 15:44:57,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195532889] [2020-07-21 15:44:57,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 15:44:57,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:57,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 15:44:57,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 15:44:57,561 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 8 states. [2020-07-21 15:44:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:57,707 INFO L93 Difference]: Finished difference Result 131 states and 196 transitions. [2020-07-21 15:44:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:44:57,709 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-07-21 15:44:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:57,722 INFO L225 Difference]: With dead ends: 131 [2020-07-21 15:44:57,723 INFO L226 Difference]: Without dead ends: 71 [2020-07-21 15:44:57,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:44:57,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-21 15:44:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-07-21 15:44:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 15:44:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2020-07-21 15:44:57,787 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 34 [2020-07-21 15:44:57,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:57,788 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2020-07-21 15:44:57,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 15:44:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2020-07-21 15:44:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 15:44:57,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:57,792 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-07-21 15:44:58,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:58,007 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:58,008 INFO L82 PathProgramCache]: Analyzing trace with hash 837286191, now seen corresponding path program 1 times [2020-07-21 15:44:58,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:58,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421542413] [2020-07-21 15:44:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:44:58,111 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:44:58,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:58,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 15:44:58,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 15:44:58,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:44:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 15:44:58,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421542413] [2020-07-21 15:44:58,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:44:58,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-21 15:44:58,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216370688] [2020-07-21 15:44:58,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 15:44:58,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:58,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 15:44:58,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:44:58,433 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 16 states. [2020-07-21 15:44:58,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:58,630 INFO L93 Difference]: Finished difference Result 124 states and 164 transitions. [2020-07-21 15:44:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:44:58,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-07-21 15:44:58,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:58,634 INFO L225 Difference]: With dead ends: 124 [2020-07-21 15:44:58,634 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 15:44:58,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-07-21 15:44:58,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 15:44:58,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-07-21 15:44:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 15:44:58,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2020-07-21 15:44:58,651 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 38 [2020-07-21 15:44:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:58,652 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2020-07-21 15:44:58,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 15:44:58,652 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2020-07-21 15:44:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 15:44:58,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:58,654 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-07-21 15:44:58,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:58,870 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:58,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:58,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2083243036, now seen corresponding path program 1 times [2020-07-21 15:44:58,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:58,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630093614] [2020-07-21 15:44:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:44:58,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:58,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:58,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:44:58,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 15:44:59,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:44:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 15:44:59,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630093614] [2020-07-21 15:44:59,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:44:59,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-21 15:44:59,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682481499] [2020-07-21 15:44:59,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:44:59,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:59,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:44:59,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:44:59,130 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand 9 states. [2020-07-21 15:44:59,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:59,346 INFO L93 Difference]: Finished difference Result 137 states and 182 transitions. [2020-07-21 15:44:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:44:59,347 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-07-21 15:44:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:59,350 INFO L225 Difference]: With dead ends: 137 [2020-07-21 15:44:59,350 INFO L226 Difference]: Without dead ends: 114 [2020-07-21 15:44:59,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:44:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-21 15:44:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 90. [2020-07-21 15:44:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 15:44:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2020-07-21 15:44:59,371 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 42 [2020-07-21 15:44:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:59,373 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2020-07-21 15:44:59,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:44:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2020-07-21 15:44:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 15:44:59,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:59,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2020-07-21 15:44:59,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:59,589 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:59,590 INFO L82 PathProgramCache]: Analyzing trace with hash 424074718, now seen corresponding path program 2 times [2020-07-21 15:44:59,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:59,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386213580] [2020-07-21 15:44:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:44:59,638 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:59,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:59,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 15:44:59,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 15:44:59,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:01,064 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 15:45:02,968 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 15:45:04,347 WARN L838 $PredicateComparison]: unable to prove that (forall ((addflt_~b Int)) (<= (mod addflt_~b 4294967296) (mod c_main_~a~0 4294967296))) is different from false [2020-07-21 15:45:04,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386213580] [2020-07-21 15:45:04,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 15:45:04,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 15:45:04,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705616719] [2020-07-21 15:45:04,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 15:45:04,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:04,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 15:45:04,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=72, Unknown=1, NotChecked=16, Total=110 [2020-07-21 15:45:04,359 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand 8 states. [2020-07-21 15:45:04,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:04,562 INFO L93 Difference]: Finished difference Result 164 states and 220 transitions. [2020-07-21 15:45:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:45:04,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-07-21 15:45:04,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:04,567 INFO L225 Difference]: With dead ends: 164 [2020-07-21 15:45:04,570 INFO L226 Difference]: Without dead ends: 132 [2020-07-21 15:45:04,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=31, Invalid=104, Unknown=1, NotChecked=20, Total=156 [2020-07-21 15:45:04,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-21 15:45:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 115. [2020-07-21 15:45:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-07-21 15:45:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2020-07-21 15:45:04,617 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 42 [2020-07-21 15:45:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:04,617 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2020-07-21 15:45:04,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 15:45:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2020-07-21 15:45:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 15:45:04,623 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:04,623 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2020-07-21 15:45:04,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:04,839 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:04,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:04,840 INFO L82 PathProgramCache]: Analyzing trace with hash 481333020, now seen corresponding path program 1 times [2020-07-21 15:45:04,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:04,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178117585] [2020-07-21 15:45:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:45:04,928 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:04,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:04,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-21 15:45:04,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:05,087 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:05,095 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 15:45:05,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:05,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178117585] [2020-07-21 15:45:05,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:05,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-21 15:45:05,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445336289] [2020-07-21 15:45:05,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 15:45:05,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:05,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 15:45:05,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:45:05,143 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand 13 states. [2020-07-21 15:45:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:05,532 INFO L93 Difference]: Finished difference Result 207 states and 278 transitions. [2020-07-21 15:45:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 15:45:05,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-07-21 15:45:05,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:05,538 INFO L225 Difference]: With dead ends: 207 [2020-07-21 15:45:05,539 INFO L226 Difference]: Without dead ends: 169 [2020-07-21 15:45:05,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:45:05,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-21 15:45:05,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 153. [2020-07-21 15:45:05,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-21 15:45:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 203 transitions. [2020-07-21 15:45:05,585 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 203 transitions. Word has length 42 [2020-07-21 15:45:05,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:05,586 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 203 transitions. [2020-07-21 15:45:05,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 15:45:05,586 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 203 transitions. [2020-07-21 15:45:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 15:45:05,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:05,590 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2020-07-21 15:45:05,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:05,794 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:05,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:05,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2004765024, now seen corresponding path program 1 times [2020-07-21 15:45:05,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:05,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419996976] [2020-07-21 15:45:05,796 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:05,905 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:05,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 15:45:05,906 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 15:45:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 15:45:05,927 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 15:45:05,950 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 15:45:05,950 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 15:45:06,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:06,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:45:06 BoogieIcfgContainer [2020-07-21 15:45:06,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:45:06,190 INFO L168 Benchmark]: Toolchain (without parser) took 10256.23 ms. Allocated memory was 134.7 MB in the beginning and 254.8 MB in the end (delta: 120.1 MB). Free memory was 99.1 MB in the beginning and 115.7 MB in the end (delta: -16.7 MB). Peak memory consumption was 103.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:06,191 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 15:45:06,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 445.46 ms. Allocated memory was 134.7 MB in the beginning and 199.8 MB in the end (delta: 65.0 MB). Free memory was 98.6 MB in the beginning and 177.4 MB in the end (delta: -78.8 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:06,193 INFO L168 Benchmark]: Boogie Preprocessor took 53.02 ms. Allocated memory is still 199.8 MB. Free memory was 177.4 MB in the beginning and 175.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:06,194 INFO L168 Benchmark]: RCFGBuilder took 667.96 ms. Allocated memory is still 199.8 MB. Free memory was 175.2 MB in the beginning and 150.6 MB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:06,195 INFO L168 Benchmark]: TraceAbstraction took 9077.10 ms. Allocated memory was 199.8 MB in the beginning and 254.8 MB in the end (delta: 55.1 MB). Free memory was 150.6 MB in the beginning and 115.7 MB in the end (delta: 34.9 MB). Peak memory consumption was 90.0 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:06,199 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 445.46 ms. Allocated memory was 134.7 MB in the beginning and 199.8 MB in the end (delta: 65.0 MB). Free memory was 98.6 MB in the beginning and 177.4 MB in the end (delta: -78.8 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 53.02 ms. Allocated memory is still 199.8 MB. Free memory was 177.4 MB in the beginning and 175.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 667.96 ms. Allocated memory is still 199.8 MB. Free memory was 175.2 MB in the beginning and 150.6 MB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9077.10 ms. Allocated memory was 199.8 MB in the beginning and 254.8 MB in the end (delta: 55.1 MB). Free memory was 150.6 MB in the beginning and 115.7 MB in the end (delta: 34.9 MB). Peak memory consumption was 90.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 100, overapproximation of bitwiseAnd at line 98. Possible FailurePath: [L216] unsigned int a ; [L217] unsigned int ma = __VERIFIER_nondet_uint(); [L218] signed char ea = __VERIFIER_nondet_char(); [L219] unsigned int b ; [L220] unsigned int mb = __VERIFIER_nondet_uint(); [L221] signed char eb = __VERIFIER_nondet_char(); [L222] unsigned int r_add1 ; [L223] unsigned int r_add2 ; [L224] unsigned int zero ; [L225] int tmp ; [L226] int tmp___0 ; [L227] int __retres14 ; VAL [ea=127, eb=-128, ma=33554432, mb=16777216] [L231] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L19] COND TRUE ! m [L20] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L70] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L231] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=-128, ma=33554432, mb=16777216] [L231] zero = base2flt(0, 0) [L232] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L19] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L47] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L49] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L54] COND TRUE e >= 127 [L55] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L70] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, __retres4=4294967295, e=127, m=33554432] [L232] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=-128, ma=33554432, mb=16777216, zero=0] [L232] a = base2flt(ma, ea) [L233] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=-128, \old(m)=16777216] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L19] COND FALSE !(! m) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L47] COND TRUE 1 VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L49] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L66] m = m & ~ (1U << 24U) [L67] res = m | ((unsigned int )(e + 128) << 24U) [L68] __retres4 = res VAL [\old(e)=-128, \old(m)=16777216, __retres4=4278190080, e=-128, res=4278190080] [L70] return (__retres4); VAL [\old(e)=-128, \old(m)=16777216, \result=72057602611085312, __retres4=4278190080, e=-128, res=4278190080] [L233] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=72057602611085312, ea=127, eb=-128, ma=33554432, mb=16777216, zero=0] [L233] b = base2flt(mb, eb) [L234] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=4278190080] [L74] unsigned int res ; [L75] unsigned int ma ; [L76] unsigned int mb ; [L77] unsigned int delta ; [L78] int ea ; [L79] int eb ; [L80] unsigned int tmp ; [L81] unsigned int __retres10 ; VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080] [L84] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080] [L91] COND FALSE !(! b) [L98] ma = a & ((1U << 24U) - 1U) [L99] ea = (int )(a >> 24U) - 128 [L100] ma = ma | (1U << 24U) [L101] mb = b & ((1U << 24U) - 1U) [L102] eb = (int )(b >> 24U) - 128 [L103] mb = mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080, ea=127, eb=383] [L104] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.9s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 449 SDtfs, 210 SDslu, 3239 SDs, 0 SdLazy, 499 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 299 GetRequests, 229 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=153occurred in iteration=5, 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, 5 MinimizatonAttempts, 86 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 240 NumberOfCodeBlocks, 198 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 271 ConstructedInterpolants, 0 QuantifiedInterpolants, 19875 SizeOfPredicates, 21 NumberOfNonLiveVariables, 543 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 106/119 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...