/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:39:27,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:39:27,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:39:27,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:39:27,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:39:27,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:39:27,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:39:27,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:39:27,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:39:27,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:39:27,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:39:27,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:39:27,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:39:27,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:39:27,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:39:27,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:39:27,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:39:27,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:39:27,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:39:27,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:39:27,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:39:27,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:39:27,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:39:27,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:39:27,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:39:27,559 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:39:27,559 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:39:27,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:39:27,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:39:27,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:39:27,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:39:27,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:39:27,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:39:27,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:39:27,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:39:27,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:39:27,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:39:27,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:39:27,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:39:27,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:39:27,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:39:27,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 16:39:27,617 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:39:27,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:39:27,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:39:27,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:39:27,620 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:39:27,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:39:27,621 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:39:27,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:39:27,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:39:27,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:39:27,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:39:27,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:39:27,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:39:27,623 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:39:27,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:39:27,624 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:39:27,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:39:27,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:39:27,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:39:27,624 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:39:27,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:39:27,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:39:27,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:39:27,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:39:27,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:39:27,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:39:27,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:39:27,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:39:27,626 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:39:27,626 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:39:27,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:39:27,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:39:27,943 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:39:27,944 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:39:27,945 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:39:27,945 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-2.i [2020-08-21 16:39:28,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0544dc18/4d81ca64f9924b7cb1c01e5475bd8397/FLAGbb6949aa3 [2020-08-21 16:39:28,439 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:39:28,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/trex01-2.i [2020-08-21 16:39:28,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0544dc18/4d81ca64f9924b7cb1c01e5475bd8397/FLAGbb6949aa3 [2020-08-21 16:39:28,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0544dc18/4d81ca64f9924b7cb1c01e5475bd8397 [2020-08-21 16:39:28,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:39:28,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:39:28,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:28,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:39:28,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:39:28,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:28" (1/1) ... [2020-08-21 16:39:28,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f77297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:28, skipping insertion in model container [2020-08-21 16:39:28,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:28" (1/1) ... [2020-08-21 16:39:28,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:39:28,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:39:29,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:29,068 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:39:29,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:29,100 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:39:29,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:29 WrapperNode [2020-08-21 16:39:29,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:29,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:39:29,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:39:29,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:39:29,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:29" (1/1) ... [2020-08-21 16:39:29,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:29" (1/1) ... [2020-08-21 16:39:29,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:29" (1/1) ... [2020-08-21 16:39:29,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:29" (1/1) ... [2020-08-21 16:39:29,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:29" (1/1) ... [2020-08-21 16:39:29,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:29" (1/1) ... [2020-08-21 16:39:29,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:29" (1/1) ... [2020-08-21 16:39:29,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:39:29,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:39:29,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:39:29,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:39:29,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 16:39:29,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:39:29,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:39:29,295 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 16:39:29,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 16:39:29,295 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-08-21 16:39:29,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:39:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:39:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 16:39:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 16:39:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:39:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 16:39:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:39:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-08-21 16:39:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:39:29,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:39:29,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:39:29,529 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:39:29,530 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 16:39:29,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:29 BoogieIcfgContainer [2020-08-21 16:39:29,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:39:29,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:39:29,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:39:29,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:39:29,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:39:28" (1/3) ... [2020-08-21 16:39:29,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7202e9a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:29, skipping insertion in model container [2020-08-21 16:39:29,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:29" (2/3) ... [2020-08-21 16:39:29,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7202e9a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:29, skipping insertion in model container [2020-08-21 16:39:29,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:29" (3/3) ... [2020-08-21 16:39:29,544 INFO L109 eAbstractionObserver]: Analyzing ICFG trex01-2.i [2020-08-21 16:39:29,556 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:39:29,564 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:39:29,587 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:39:29,623 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:39:29,627 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:39:29,627 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:39:29,627 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:39:29,627 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:39:29,627 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:39:29,627 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:39:29,628 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:39:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-08-21 16:39:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 16:39:29,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:29,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:29,657 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:29,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:29,664 INFO L82 PathProgramCache]: Analyzing trace with hash -409844558, now seen corresponding path program 1 times [2020-08-21 16:39:29,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:29,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332056443] [2020-08-21 16:39:29,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:29,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:29,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332056443] [2020-08-21 16:39:29,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:29,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 16:39:29,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967693932] [2020-08-21 16:39:29,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 16:39:29,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:29,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 16:39:29,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 16:39:29,837 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-08-21 16:39:29,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:29,864 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2020-08-21 16:39:29,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 16:39:29,865 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-21 16:39:29,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:29,875 INFO L225 Difference]: With dead ends: 51 [2020-08-21 16:39:29,875 INFO L226 Difference]: Without dead ends: 16 [2020-08-21 16:39:29,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 16:39:29,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-21 16:39:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-21 16:39:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-21 16:39:29,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-08-21 16:39:29,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2020-08-21 16:39:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:29,921 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-08-21 16:39:29,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 16:39:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-08-21 16:39:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 16:39:29,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:29,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:29,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:39:29,923 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:29,924 INFO L82 PathProgramCache]: Analyzing trace with hash -413538642, now seen corresponding path program 1 times [2020-08-21 16:39:29,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:29,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462295300] [2020-08-21 16:39:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:30,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:30,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462295300] [2020-08-21 16:39:30,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:30,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:39:30,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717995345] [2020-08-21 16:39:30,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:39:30,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:30,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:39:30,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:39:30,074 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-08-21 16:39:30,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:30,110 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-08-21 16:39:30,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:39:30,111 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 16:39:30,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:30,111 INFO L225 Difference]: With dead ends: 16 [2020-08-21 16:39:30,112 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 16:39:30,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:39:30,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 16:39:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 16:39:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 16:39:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 16:39:30,114 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-08-21 16:39:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:30,115 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 16:39:30,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:39:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 16:39:30,115 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 16:39:30,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:39:30,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 16:39:30,176 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 16:39:30,177 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:39:30,177 INFO L268 CegarLoopResult]: For program point L27(lines 27 34) no Hoare annotation was computed. [2020-08-21 16:39:30,177 INFO L271 CegarLoopResult]: At program point L27-2(lines 25 35) the Hoare annotation is: true [2020-08-21 16:39:30,177 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-08-21 16:39:30,177 INFO L268 CegarLoopResult]: For program point L25-2(lines 14 36) no Hoare annotation was computed. [2020-08-21 16:39:30,178 INFO L264 CegarLoopResult]: At program point L19-2(line 19) the Hoare annotation is: (<= 1 f_~z~0) [2020-08-21 16:39:30,178 INFO L264 CegarLoopResult]: At program point L19-3(line 19) the Hoare annotation is: (<= 1 f_~z~0) [2020-08-21 16:39:30,178 INFO L268 CegarLoopResult]: For program point fEXIT(lines 14 36) no Hoare annotation was computed. [2020-08-21 16:39:30,178 INFO L271 CegarLoopResult]: At program point fENTRY(lines 14 36) the Hoare annotation is: true [2020-08-21 16:39:30,179 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-08-21 16:39:30,179 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-08-21 16:39:30,179 INFO L268 CegarLoopResult]: For program point L20(lines 14 36) no Hoare annotation was computed. [2020-08-21 16:39:30,179 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-08-21 16:39:30,179 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:39:30,180 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 16:39:30,180 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 16:39:30,180 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 16:39:30,180 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 16:39:30,180 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 16:39:30,181 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 16:39:30,181 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 16:39:30,181 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 37 45) the Hoare annotation is: true [2020-08-21 16:39:30,181 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 37 45) no Hoare annotation was computed. [2020-08-21 16:39:30,182 INFO L271 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: true [2020-08-21 16:39:30,182 INFO L268 CegarLoopResult]: For program point L42-1(lines 39 43) no Hoare annotation was computed. [2020-08-21 16:39:30,182 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 37 45) no Hoare annotation was computed. [2020-08-21 16:39:30,182 INFO L271 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: true [2020-08-21 16:39:30,182 INFO L268 CegarLoopResult]: For program point L39(lines 39 43) no Hoare annotation was computed. [2020-08-21 16:39:30,183 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-21 16:39:30,183 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-21 16:39:30,183 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 16:39:30,183 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-21 16:39:30,183 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-21 16:39:30,184 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-21 16:39:30,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:39:30 BoogieIcfgContainer [2020-08-21 16:39:30,202 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:39:30,205 INFO L168 Benchmark]: Toolchain (without parser) took 1344.95 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 104.2 MB in the beginning and 133.1 MB in the end (delta: -29.0 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:30,206 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 16:39:30,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.30 ms. Allocated memory is still 148.4 MB. Free memory was 103.9 MB in the beginning and 94.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:30,209 INFO L168 Benchmark]: Boogie Preprocessor took 121.17 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 94.1 MB in the beginning and 183.1 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:30,210 INFO L168 Benchmark]: RCFGBuilder took 312.68 ms. Allocated memory is still 205.0 MB. Free memory was 183.1 MB in the beginning and 168.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:30,210 INFO L168 Benchmark]: TraceAbstraction took 665.26 ms. Allocated memory is still 205.0 MB. Free memory was 167.7 MB in the beginning and 133.1 MB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:30,215 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 240.30 ms. Allocated memory is still 148.4 MB. Free memory was 103.9 MB in the beginning and 94.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.17 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 94.1 MB in the beginning and 183.1 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.68 ms. Allocated memory is still 205.0 MB. Free memory was 183.1 MB in the beginning and 168.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 665.26 ms. Allocated memory is still 205.0 MB. Free memory was 167.7 MB in the beginning and 133.1 MB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 <= z - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 1 SDslu, 33 SDs, 0 SdLazy, 8 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 16 PreInvPairs, 20 NumberOfFragments, 15 HoareAnnotationTreeSize, 16 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 494 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 correct! Received shutdown request...