/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:30:06,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:30:06,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:30:06,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:30:06,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:30:06,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:30:06,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:30:06,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:30:06,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:30:06,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:30:06,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:30:06,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:30:06,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:30:06,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:30:06,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:30:06,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:30:06,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:30:06,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:30:06,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:30:06,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:30:06,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:30:06,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:30:06,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:30:06,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:30:06,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:30:06,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:30:06,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:30:06,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:30:06,506 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 11:30:06,545 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:30:06,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:30:06,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:30:06,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:30:06,548 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:30:06,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:30:06,548 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:30:06,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:30:06,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:30:06,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:30:06,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:30:06,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:30:06,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:30:06,553 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:30:06,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:30:06,553 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:30:06,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:30:06,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:30:06,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:30:06,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:30:06,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:30:06,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:30:06,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:30:06,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:30:06,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:30:06,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:30:06,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:06,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:30:06,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:30:06,557 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 -> NOT_INCREMENTALLY [2020-07-20 11:30:06,879 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:30:06,892 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:30:06,896 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:30:06,897 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:30:06,898 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:30:06,899 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test11.c [2020-07-20 11:30:06,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0048fa59d/d18be917bacf41b7ad759781efdf3841/FLAG10456fc3f [2020-07-20 11:30:07,453 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:30:07,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test11.c [2020-07-20 11:30:07,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0048fa59d/d18be917bacf41b7ad759781efdf3841/FLAG10456fc3f [2020-07-20 11:30:07,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0048fa59d/d18be917bacf41b7ad759781efdf3841 [2020-07-20 11:30:07,858 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:30:07,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:30:07,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:30:07,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:30:07,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:30:07,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:30:07" (1/1) ... [2020-07-20 11:30:07,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a41f30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:07, skipping insertion in model container [2020-07-20 11:30:07,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:30:07" (1/1) ... [2020-07-20 11:30:07,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:30:07,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:30:08,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:30:08,135 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:30:08,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:30:08,172 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:30:08,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:08 WrapperNode [2020-07-20 11:30:08,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:30:08,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:30:08,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:30:08,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:30:08,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:08" (1/1) ... [2020-07-20 11:30:08,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:08" (1/1) ... [2020-07-20 11:30:08,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:08" (1/1) ... [2020-07-20 11:30:08,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:08" (1/1) ... [2020-07-20 11:30:08,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:08" (1/1) ... [2020-07-20 11:30:08,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:08" (1/1) ... [2020-07-20 11:30:08,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:08" (1/1) ... [2020-07-20 11:30:08,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:30:08,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:30:08,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:30:08,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:30:08,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:08" (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 11:30:08,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:30:08,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:30:08,380 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-07-20 11:30:08,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:30:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:30:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:30:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 11:30:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-07-20 11:30:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:30:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:30:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 11:30:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:30:08,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:30:08,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:30:08,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:30:08,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:30:08,681 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:30:08,686 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:30:08,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:30:08 BoogieIcfgContainer [2020-07-20 11:30:08,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:30:08,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:30:08,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:30:08,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:30:08,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:30:07" (1/3) ... [2020-07-20 11:30:08,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc4db89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:30:08, skipping insertion in model container [2020-07-20 11:30:08,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:08" (2/3) ... [2020-07-20 11:30:08,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc4db89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:30:08, skipping insertion in model container [2020-07-20 11:30:08,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:30:08" (3/3) ... [2020-07-20 11:30:08,714 INFO L109 eAbstractionObserver]: Analyzing ICFG test11.c [2020-07-20 11:30:08,737 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:30:08,745 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:30:08,768 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:30:08,792 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:30:08,793 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:30:08,793 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:30:08,793 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:30:08,793 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:30:08,793 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:30:08,794 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:30:08,794 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:30:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-20 11:30:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 11:30:08,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:30:08,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:30:08,819 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:30:08,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:30:08,825 INFO L82 PathProgramCache]: Analyzing trace with hash -722462527, now seen corresponding path program 1 times [2020-07-20 11:30:08,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:30:08,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730476429] [2020-07-20 11:30:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:30:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:30:08,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:30:08,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:30:09,052 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:30:09,068 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 11:30:09,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:30:09,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730476429] [2020-07-20 11:30:09,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:30:09,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:30:09,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605386047] [2020-07-20 11:30:09,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:30:09,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:30:09,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:30:09,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:30:09,091 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-20 11:30:09,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:30:09,187 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-20 11:30:09,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:30:09,190 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 11:30:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:30:09,200 INFO L225 Difference]: With dead ends: 31 [2020-07-20 11:30:09,201 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 11:30:09,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:30:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 11:30:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 11:30:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 11:30:09,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-07-20 11:30:09,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-07-20 11:30:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:30:09,247 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-07-20 11:30:09,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:30:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-07-20 11:30:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:30:09,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:30:09,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:30:09,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:09,459 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:30:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:30:09,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1499811687, now seen corresponding path program 1 times [2020-07-20 11:30:09,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:30:09,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658910185] [2020-07-20 11:30:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:30:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:30:09,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:30:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:30:09,570 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:30:09,580 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 11:30:09,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:30:09,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658910185] [2020-07-20 11:30:09,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:30:09,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:30:09,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440744960] [2020-07-20 11:30:09,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:30:09,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:30:09,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:30:09,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:30:09,585 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-07-20 11:30:09,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:30:09,633 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-07-20 11:30:09,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:30:09,634 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-20 11:30:09,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:30:09,635 INFO L225 Difference]: With dead ends: 21 [2020-07-20 11:30:09,635 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 11:30:09,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:30:09,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 11:30:09,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 11:30:09,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 11:30:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-07-20 11:30:09,642 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2020-07-20 11:30:09,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:30:09,643 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-07-20 11:30:09,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:30:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-20 11:30:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:30:09,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:30:09,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:30:09,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:09,858 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:30:09,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:30:09,859 INFO L82 PathProgramCache]: Analyzing trace with hash -750476091, now seen corresponding path program 1 times [2020-07-20 11:30:09,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:30:09,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904362110] [2020-07-20 11:30:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 11:30:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:30:09,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:30:09,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:30:09,957 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 11:30:09,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:30:09,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904362110] [2020-07-20 11:30:09,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:30:09,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:30:09,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189494753] [2020-07-20 11:30:09,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:30:09,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:30:09,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:30:09,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:30:09,960 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2020-07-20 11:30:09,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:30:09,979 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-07-20 11:30:09,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:30:09,980 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-07-20 11:30:09,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:30:09,981 INFO L225 Difference]: With dead ends: 19 [2020-07-20 11:30:09,981 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:30:09,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:30:09,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:30:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:30:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:30:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:30:09,983 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-07-20 11:30:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:30:09,983 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:30:09,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:30:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:30:09,984 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:30:10,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:10,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:30:10,340 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:30:10,341 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:30:10,341 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:30:10,341 INFO L268 CegarLoopResult]: For program point get_dummyFINAL(lines 7 10) no Hoare annotation was computed. [2020-07-20 11:30:10,342 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-07-20 11:30:10,342 INFO L271 CegarLoopResult]: At program point get_dummyENTRY(lines 7 10) the Hoare annotation is: true [2020-07-20 11:30:10,342 INFO L268 CegarLoopResult]: For program point get_dummyEXIT(lines 7 10) no Hoare annotation was computed. [2020-07-20 11:30:10,342 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:30:10,342 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (< 0 |#StackHeapBarrier|) [2020-07-20 11:30:10,342 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:30:10,343 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:30:10,344 INFO L264 CegarLoopResult]: At program point L25(lines 12 32) the Hoare annotation is: (not (< 0 |#StackHeapBarrier|)) [2020-07-20 11:30:10,344 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 32) no Hoare annotation was computed. [2020-07-20 11:30:10,344 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-07-20 11:30:10,345 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (or (and (<= 2 main_~pc~0.base) (= |main_~#c~0.offset| main_~pc~0.offset) (= main_~pc~0.base |main_~#c~0.base|)) (not (< 0 |#StackHeapBarrier|))) [2020-07-20 11:30:10,346 INFO L268 CegarLoopResult]: For program point L19-2(line 19) no Hoare annotation was computed. [2020-07-20 11:30:10,346 INFO L268 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-07-20 11:30:10,346 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 32) no Hoare annotation was computed. [2020-07-20 11:30:10,347 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 30) no Hoare annotation was computed. [2020-07-20 11:30:10,347 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 32) the Hoare annotation is: true [2020-07-20 11:30:10,348 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-07-20 11:30:10,348 INFO L268 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-07-20 11:30:10,348 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 21) no Hoare annotation was computed. [2020-07-20 11:30:10,363 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-20 11:30:10,369 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-20 11:30:10,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:30:10 BoogieIcfgContainer [2020-07-20 11:30:10,374 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:30:10,378 INFO L168 Benchmark]: Toolchain (without parser) took 2516.03 ms. Allocated memory was 138.4 MB in the beginning and 235.4 MB in the end (delta: 97.0 MB). Free memory was 102.1 MB in the beginning and 200.3 MB in the end (delta: -98.2 MB). Peak memory consumption was 84.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:10,382 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 11:30:10,383 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.14 ms. Allocated memory is still 138.4 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:10,385 INFO L168 Benchmark]: Boogie Preprocessor took 135.38 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 180.5 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:10,387 INFO L168 Benchmark]: RCFGBuilder took 387.15 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 163.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:10,393 INFO L168 Benchmark]: TraceAbstraction took 1675.64 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 163.5 MB in the beginning and 200.3 MB in the end (delta: -36.8 MB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:10,407 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.14 ms. Allocated memory is still 138.4 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.38 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 180.5 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 387.15 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 163.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1675.64 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 163.5 MB in the beginning and 200.3 MB in the end (delta: -36.8 MB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 30]: 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: 12]: Loop Invariant [2020-07-20 11:30:10,420 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-20 11:30:10,421 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier Derived loop invariant: !(0 < unknown-#StackHeapBarrier-unknown) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 52 SDtfs, 40 SDslu, 95 SDs, 0 SdLazy, 22 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 26 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 47 ConstructedInterpolants, 0 QuantifiedInterpolants, 1793 SizeOfPredicates, 17 NumberOfNonLiveVariables, 359 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...