/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/terminator_03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:17:21,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:17:21,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:17:21,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:17:21,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:17:21,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:17:21,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:17:21,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:17:21,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:17:21,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:17:21,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:17:21,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:17:21,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:17:21,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:17:21,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:17:21,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:17:21,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:17:21,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:17:21,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:17:21,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:17:21,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:17:21,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:17:21,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:17:21,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:17:21,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 22:17:21,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 22:17:21,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 22:17:21,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 22:17:21,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 22:17:21,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 22:17:21,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 22:17:21,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 22:17:21,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 22:17:21,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 22:17:21,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 22:17:21,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 22:17:21,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 22:17:21,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 22:17:21,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:17:21,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:17:21,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:17:21,432 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:17:21,450 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:17:21,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:17:21,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:17:21,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:17:21,453 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:17:21,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:17:21,454 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:17:21,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:17:21,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:17:21,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:17:21,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:17:21,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:17:21,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:17:21,455 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:17:21,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:17:21,456 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:17:21,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:17:21,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:17:21,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:17:21,457 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:17:21,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:17:21,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:17:21,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:17:21,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:17:21,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:17:21,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:17:21,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:21,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:17:21,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:17:21,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:17:21,837 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:17:21,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:17:21,859 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:17:21,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:17:21,862 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:17:21,863 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_03-1.c [2020-07-20 22:17:21,948 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b852123e/a244c8432f1a425e996abe36e7ca2950/FLAGc6b73a134 [2020-07-20 22:17:22,600 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:17:22,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_03-1.c [2020-07-20 22:17:22,614 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b852123e/a244c8432f1a425e996abe36e7ca2950/FLAGc6b73a134 [2020-07-20 22:17:22,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b852123e/a244c8432f1a425e996abe36e7ca2950 [2020-07-20 22:17:22,890 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:17:22,894 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:17:22,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:17:22,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:17:22,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:17:22,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:17:22" (1/1) ... [2020-07-20 22:17:22,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@487a7de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:22, skipping insertion in model container [2020-07-20 22:17:22,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:17:22" (1/1) ... [2020-07-20 22:17:22,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:17:22,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:17:23,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:17:23,193 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:17:23,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:17:23,236 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:17:23,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:23 WrapperNode [2020-07-20 22:17:23,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:17:23,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:17:23,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:17:23,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:17:23,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:23" (1/1) ... [2020-07-20 22:17:23,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:23" (1/1) ... [2020-07-20 22:17:23,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:23" (1/1) ... [2020-07-20 22:17:23,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:23" (1/1) ... [2020-07-20 22:17:23,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:23" (1/1) ... [2020-07-20 22:17:23,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:23" (1/1) ... [2020-07-20 22:17:23,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:23" (1/1) ... [2020-07-20 22:17:23,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:17:23,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:17:23,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:17:23,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:17:23,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:17:23,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:17:23,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:17:23,460 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:17:23,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:17:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:17:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:17:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:17:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:17:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:17:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:17:23,659 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:17:23,660 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:17:23,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:17:23 BoogieIcfgContainer [2020-07-20 22:17:23,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:17:23,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:17:23,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:17:23,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:17:23,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:17:22" (1/3) ... [2020-07-20 22:17:23,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199064b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:17:23, skipping insertion in model container [2020-07-20 22:17:23,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:23" (2/3) ... [2020-07-20 22:17:23,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199064b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:17:23, skipping insertion in model container [2020-07-20 22:17:23,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:17:23" (3/3) ... [2020-07-20 22:17:23,673 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_03-1.c [2020-07-20 22:17:23,683 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:17:23,691 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:17:23,710 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:17:23,743 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:17:23,743 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:17:23,744 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:17:23,744 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:17:23,744 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:17:23,744 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:17:23,745 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:17:23,745 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:17:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 22:17:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 22:17:23,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:17:23,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:17:23,778 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:17:23,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:17:23,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2020-07-20 22:17:23,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:17:23,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761166230] [2020-07-20 22:17:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:23,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:17:23,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:17:23,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:17:23,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:17:23,975 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:17:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:17:24,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:17:24,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761166230] [2020-07-20 22:17:24,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:17:24,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:17:24,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032224732] [2020-07-20 22:17:24,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:17:24,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:17:24,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:17:24,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:17:24,070 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-07-20 22:17:24,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:17:24,184 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-07-20 22:17:24,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:17:24,188 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 22:17:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:17:24,202 INFO L225 Difference]: With dead ends: 39 [2020-07-20 22:17:24,203 INFO L226 Difference]: Without dead ends: 12 [2020-07-20 22:17:24,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:17:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-20 22:17:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-20 22:17:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-20 22:17:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-20 22:17:24,259 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-20 22:17:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:17:24,261 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-20 22:17:24,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:17:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-20 22:17:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 22:17:24,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:17:24,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:17:24,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:24,471 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:17:24,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:17:24,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1117320769, now seen corresponding path program 1 times [2020-07-20 22:17:24,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:17:24,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020389973] [2020-07-20 22:17:24,475 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:24,516 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:17:24,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 22:17:24,517 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:17:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 22:17:24,530 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:17:24,546 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 22:17:24,547 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 22:17:24,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:24,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:17:24 BoogieIcfgContainer [2020-07-20 22:17:24,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:17:24,783 INFO L168 Benchmark]: Toolchain (without parser) took 1890.17 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 99.3 MB in the beginning and 132.6 MB in the end (delta: -33.3 MB). Peak memory consumption was 30.1 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:24,784 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory was 117.2 MB in the beginning and 117.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 22:17:24,786 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.41 ms. Allocated memory is still 136.3 MB. Free memory was 98.8 MB in the beginning and 89.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:24,787 INFO L168 Benchmark]: Boogie Preprocessor took 145.88 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 89.5 MB in the beginning and 179.8 MB in the end (delta: -90.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:24,788 INFO L168 Benchmark]: RCFGBuilder took 280.23 ms. Allocated memory is still 199.8 MB. Free memory was 179.8 MB in the beginning and 166.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:24,790 INFO L168 Benchmark]: TraceAbstraction took 1113.92 ms. Allocated memory is still 199.8 MB. Free memory was 166.4 MB in the beginning and 132.6 MB in the end (delta: 33.8 MB). Peak memory consumption was 33.8 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:24,795 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory was 117.2 MB in the beginning and 117.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 342.41 ms. Allocated memory is still 136.3 MB. Free memory was 98.8 MB in the beginning and 89.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.88 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 89.5 MB in the beginning and 179.8 MB in the end (delta: -90.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 280.23 ms. Allocated memory is still 199.8 MB. Free memory was 179.8 MB in the beginning and 166.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1113.92 ms. Allocated memory is still 199.8 MB. Free memory was 166.4 MB in the beginning and 132.6 MB in the end (delta: 33.8 MB). Peak memory consumption was 33.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int x=__VERIFIER_nondet_int(); [L14] int y=__VERIFIER_nondet_int(); [L16] COND TRUE y>0 VAL [x=100, y=1] [L18] COND FALSE !(x<100) VAL [x=100, y=1] [L23] CALL __VERIFIER_assert(y<=0 || (y<0 && x>=100)) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 7 SDslu, 49 SDs, 0 SdLazy, 15 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 21 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 135 SizeOfPredicates, 2 NumberOfNonLiveVariables, 22 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 proved your program to be incorrect! Received shutdown request...