/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_FUNCTIONS --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 12:55:53,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:55:53,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:55:53,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:55:53,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:55:53,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:55:53,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:55:53,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:55:53,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:55:53,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:55:53,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:55:53,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:55:53,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:55:53,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:55:53,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:55:53,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:55:53,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:55:53,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:55:53,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:55:53,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:55:53,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:55:53,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:55:53,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:55:53,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:55:53,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:55:53,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:55:53,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:55:53,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:55:53,421 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 12:55:53,435 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:55:53,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:55:53,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:55:53,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:55:53,437 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:55:53,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:55:53,438 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:55:53,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:55:53,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:55:53,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:55:53,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:55:53,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:55:53,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:55:53,439 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:55:53,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:55:53,439 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:55:53,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:55:53,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:55:53,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:55:53,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:55:53,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:55:53,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:55:53,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:55:53,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:55:53,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:55:53,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:55:53,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:53,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:55:53,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:55:53,442 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_FUNCTIONS 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 12:55:53,734 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:55:53,747 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:55:53,750 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:55:53,752 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:55:53,752 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:55:53,753 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-07-21 12:55:53,825 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50d8b1eb/5fc9bdcee16d4840801cd6af8c82021a/FLAGc54718ea4 [2020-07-21 12:55:54,373 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:55:54,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-07-21 12:55:54,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50d8b1eb/5fc9bdcee16d4840801cd6af8c82021a/FLAGc54718ea4 [2020-07-21 12:55:54,690 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50d8b1eb/5fc9bdcee16d4840801cd6af8c82021a [2020-07-21 12:55:54,699 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:55:54,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:55:54,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:55:54,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:55:54,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:55:54,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:55:54" (1/1) ... [2020-07-21 12:55:54,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ce081f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:54, skipping insertion in model container [2020-07-21 12:55:54,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:55:54" (1/1) ... [2020-07-21 12:55:54,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:55:54,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:55:55,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:55:55,015 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:55:55,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:55:55,150 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:55:55,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55 WrapperNode [2020-07-21 12:55:55,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:55:55,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:55:55,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:55:55,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:55:55,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (1/1) ... [2020-07-21 12:55:55,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:55:55,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:55:55,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:55:55,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:55:55,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (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 12:55:55,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:55:55,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:55:55,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 12:55:55,247 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-21 12:55:55,247 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-21 12:55:55,247 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-21 12:55:55,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:55:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:55:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:55:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 12:55:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 12:55:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-21 12:55:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-21 12:55:55,249 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-21 12:55:55,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:55:55,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:55:55,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:55:55,721 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:55:55,722 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 12:55:55,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:55:55 BoogieIcfgContainer [2020-07-21 12:55:55,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:55:55,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:55:55,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:55:55,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:55:55,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:55:54" (1/3) ... [2020-07-21 12:55:55,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549cccd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:55:55, skipping insertion in model container [2020-07-21 12:55:55,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:55" (2/3) ... [2020-07-21 12:55:55,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549cccd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:55:55, skipping insertion in model container [2020-07-21 12:55:55,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:55:55" (3/3) ... [2020-07-21 12:55:55,735 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-07-21 12:55:55,746 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:55:55,755 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:55:55,770 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:55:55,796 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:55:55,796 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:55:55,796 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:55:55,796 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:55:55,796 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:55:55,797 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:55:55,797 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:55:55,797 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:55:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-07-21 12:55:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 12:55:55,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:55:55,831 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 12:55:55,831 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:55:55,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:55:55,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1312098946, now seen corresponding path program 1 times [2020-07-21 12:55:55,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:55:55,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890949473] [2020-07-21 12:55:55,845 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 12:55:56,006 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:55:56,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:55:56,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 12:55:56,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:55:56,136 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 12:55:56,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:55:56,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890949473] [2020-07-21 12:55:56,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:55:56,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:55:56,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204229473] [2020-07-21 12:55:56,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:55:56,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:55:56,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:55:56,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:55:56,165 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 8 states. [2020-07-21 12:55:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:55:56,316 INFO L93 Difference]: Finished difference Result 131 states and 196 transitions. [2020-07-21 12:55:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:55:56,318 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-07-21 12:55:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:55:56,331 INFO L225 Difference]: With dead ends: 131 [2020-07-21 12:55:56,332 INFO L226 Difference]: Without dead ends: 71 [2020-07-21 12:55:56,337 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 12:55:56,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-21 12:55:56,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-07-21 12:55:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 12:55:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2020-07-21 12:55:56,392 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 34 [2020-07-21 12:55:56,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:55:56,393 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2020-07-21 12:55:56,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:55:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2020-07-21 12:55:56,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 12:55:56,396 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:55:56,397 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 12:55:56,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:56,602 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:55:56,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:55:56,603 INFO L82 PathProgramCache]: Analyzing trace with hash 837286191, now seen corresponding path program 1 times [2020-07-21 12:55:56,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:55:56,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965541746] [2020-07-21 12:55:56,604 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 12:55:56,678 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:55:56,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:55:56,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 12:55:56,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:55:56,806 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 12:55:56,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:55:56,996 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 12:55:56,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965541746] [2020-07-21 12:55:56,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:55:56,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-21 12:55:56,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083464917] [2020-07-21 12:55:57,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 12:55:57,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:55:57,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 12:55:57,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:55:57,001 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 16 states. [2020-07-21 12:55:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:55:57,204 INFO L93 Difference]: Finished difference Result 124 states and 164 transitions. [2020-07-21 12:55:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 12:55:57,205 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-07-21 12:55:57,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:55:57,208 INFO L225 Difference]: With dead ends: 124 [2020-07-21 12:55:57,208 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 12:55:57,210 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 12:55:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 12:55:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-07-21 12:55:57,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 12:55:57,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2020-07-21 12:55:57,228 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 38 [2020-07-21 12:55:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:55:57,229 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2020-07-21 12:55:57,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 12:55:57,229 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2020-07-21 12:55:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 12:55:57,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:55:57,232 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 12:55:57,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:57,433 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:55:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:55:57,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2083243036, now seen corresponding path program 1 times [2020-07-21 12:55:57,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:55:57,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415747381] [2020-07-21 12:55:57,434 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 12:55:57,479 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:55:57,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:55:57,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 12:55:57,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:55:57,557 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 12:55:57,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:55:57,682 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 12:55:57,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415747381] [2020-07-21 12:55:57,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:55:57,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-21 12:55:57,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778216045] [2020-07-21 12:55:57,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 12:55:57,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:55:57,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 12:55:57,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:55:57,685 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand 9 states. [2020-07-21 12:55:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:55:57,917 INFO L93 Difference]: Finished difference Result 137 states and 182 transitions. [2020-07-21 12:55:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 12:55:57,918 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-07-21 12:55:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:55:57,921 INFO L225 Difference]: With dead ends: 137 [2020-07-21 12:55:57,921 INFO L226 Difference]: Without dead ends: 114 [2020-07-21 12:55:57,922 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 12:55:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-21 12:55:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 90. [2020-07-21 12:55:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 12:55:57,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2020-07-21 12:55:57,942 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 42 [2020-07-21 12:55:57,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:55:57,943 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2020-07-21 12:55:57,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 12:55:57,943 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2020-07-21 12:55:57,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 12:55:57,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:55:57,946 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 12:55:58,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:58,162 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:55:58,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:55:58,163 INFO L82 PathProgramCache]: Analyzing trace with hash 424074718, now seen corresponding path program 2 times [2020-07-21 12:55:58,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:55:58,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710115048] [2020-07-21 12:55:58,165 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