/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/trex01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:17:04,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:17:04,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:17:04,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:17:04,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:17:04,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:17:04,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:17:04,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:17:04,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:17:04,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:17:04,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:17:04,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:17:04,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:17:04,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:17:04,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:17:04,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:17:04,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:17:04,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:17:04,396 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:17:04,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:17:04,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:17:04,398 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:17:04,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:17:04,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:17:04,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:17:04,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:17:04,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:17:04,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:17:04,400 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:17:04,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:17:04,401 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:17:04,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:17:04,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:17:04,401 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:17:04,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:17:04,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:17:04,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:17:04,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:17:04,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:17:04,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:17:04,404 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:17:04,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:17:04,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:17:04,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:17:04,887 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:17:04,888 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:17:04,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-2.i [2021-02-24 00:17:04,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffe02c127/4bed5081415e42549b499caec4493d05/FLAGac6bfbc9a [2021-02-24 00:17:05,637 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:17:05,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-2.i [2021-02-24 00:17:05,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffe02c127/4bed5081415e42549b499caec4493d05/FLAGac6bfbc9a [2021-02-24 00:17:06,006 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffe02c127/4bed5081415e42549b499caec4493d05 [2021-02-24 00:17:06,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:17:06,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:17:06,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:06,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:17:06,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:17:06,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:06" (1/1) ... [2021-02-24 00:17:06,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61a30af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:06, skipping insertion in model container [2021-02-24 00:17:06,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:06" (1/1) ... [2021-02-24 00:17:06,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:17:06,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:17:06,251 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-2.i[895,908] [2021-02-24 00:17:06,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:06,282 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:17:06,298 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-2.i[895,908] [2021-02-24 00:17:06,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:06,324 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:17:06,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:06 WrapperNode [2021-02-24 00:17:06,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:06,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:17:06,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:17:06,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:17:06,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:06" (1/1) ... [2021-02-24 00:17:06,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:06" (1/1) ... [2021-02-24 00:17:06,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:06" (1/1) ... [2021-02-24 00:17:06,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:06" (1/1) ... [2021-02-24 00:17:06,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:06" (1/1) ... [2021-02-24 00:17:06,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:06" (1/1) ... [2021-02-24 00:17:06,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:06" (1/1) ... [2021-02-24 00:17:06,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:17:06,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:17:06,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:17:06,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:17:06,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:06" (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 [2021-02-24 00:17:06,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:17:06,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:17:06,492 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:17:06,493 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:17:06,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:17:06,493 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-02-24 00:17:06,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:17:06,493 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:17:06,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:17:06,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 00:17:06,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 00:17:06,495 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:17:06,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:17:06,495 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:17:06,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:17:06,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-24 00:17:06,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:17:06,497 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-02-24 00:17:06,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:17:06,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:17:06,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:17:06,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:17:06,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:17:06,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:17:06,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:17:07,011 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:17:07,011 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-24 00:17:07,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:07 BoogieIcfgContainer [2021-02-24 00:17:07,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:17:07,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:17:07,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:17:07,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:17:07,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:17:06" (1/3) ... [2021-02-24 00:17:07,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79fdecdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:07, skipping insertion in model container [2021-02-24 00:17:07,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:06" (2/3) ... [2021-02-24 00:17:07,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79fdecdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:07, skipping insertion in model container [2021-02-24 00:17:07,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:07" (3/3) ... [2021-02-24 00:17:07,023 INFO L111 eAbstractionObserver]: Analyzing ICFG trex01-2.i [2021-02-24 00:17:07,034 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:17:07,040 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:17:07,062 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:17:07,109 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:17:07,109 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:17:07,109 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:17:07,110 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:17:07,110 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:17:07,110 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:17:07,110 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:17:07,110 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:17:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2021-02-24 00:17:07,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-24 00:17:07,154 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:07,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:07,156 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:07,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:07,166 INFO L82 PathProgramCache]: Analyzing trace with hash 608481097, now seen corresponding path program 1 times [2021-02-24 00:17:07,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:07,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521545537] [2021-02-24 00:17:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:07,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:07,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:07,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:07,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:07,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:07,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:07,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:07,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521545537] [2021-02-24 00:17:07,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:07,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:17:07,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31977040] [2021-02-24 00:17:07,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:17:07,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:07,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:17:07,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:17:07,627 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2021-02-24 00:17:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:07,799 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2021-02-24 00:17:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:17:07,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2021-02-24 00:17:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:07,812 INFO L225 Difference]: With dead ends: 83 [2021-02-24 00:17:07,813 INFO L226 Difference]: Without dead ends: 35 [2021-02-24 00:17:07,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:17:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-24 00:17:07,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-02-24 00:17:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-24 00:17:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-02-24 00:17:07,889 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2021-02-24 00:17:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:07,890 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-02-24 00:17:07,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:17:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-02-24 00:17:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-24 00:17:07,893 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:07,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:07,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:17:07,894 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:07,896 INFO L82 PathProgramCache]: Analyzing trace with hash 603863492, now seen corresponding path program 1 times [2021-02-24 00:17:07,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:07,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876289584] [2021-02-24 00:17:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:07,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:07,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:08,000 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-24 00:17:08,001 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-24 00:17:08,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:08,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:08,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:08,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:08,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:08,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876289584] [2021-02-24 00:17:08,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:08,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 00:17:08,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91992041] [2021-02-24 00:17:08,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:17:08,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:08,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:17:08,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:17:08,064 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 6 states. [2021-02-24 00:17:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:08,252 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-02-24 00:17:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:17:08,252 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2021-02-24 00:17:08,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:08,253 INFO L225 Difference]: With dead ends: 35 [2021-02-24 00:17:08,253 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 00:17:08,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:17:08,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 00:17:08,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 00:17:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 00:17:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 00:17:08,256 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-02-24 00:17:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:08,256 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 00:17:08,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:17:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 00:17:08,257 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 00:17:08,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:17:08,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 00:17:08,584 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-24 00:17:08,584 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-24 00:17:08,584 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-24 00:17:08,584 INFO L189 CegarLoopUtils]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-02-24 00:17:08,585 INFO L189 CegarLoopUtils]: For program point L12-3(line 12) no Hoare annotation was computed. [2021-02-24 00:17:08,585 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:17:08,585 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 00:17:08,585 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2021-02-24 00:17:08,585 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-24 00:17:08,586 INFO L192 CegarLoopUtils]: At program point L12-1(line 12) the Hoare annotation is: true [2021-02-24 00:17:08,586 INFO L192 CegarLoopUtils]: At program point L12-2(line 12) the Hoare annotation is: true [2021-02-24 00:17:08,586 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-02-24 00:17:08,586 INFO L192 CegarLoopUtils]: At program point L12-3(line 12) the Hoare annotation is: true [2021-02-24 00:17:08,586 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:17:08,587 INFO L192 CegarLoopUtils]: At program point L31(lines 25 47) the Hoare annotation is: true [2021-02-24 00:17:08,587 INFO L185 CegarLoopUtils]: At program point L27(lines 27 29) the Hoare annotation is: (<= 1 f_~z~0) [2021-02-24 00:17:08,587 INFO L192 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: true [2021-02-24 00:17:08,587 INFO L192 CegarLoopUtils]: At program point fEXIT(lines 25 47) the Hoare annotation is: true [2021-02-24 00:17:08,587 INFO L192 CegarLoopUtils]: At program point fENTRY(lines 25 47) the Hoare annotation is: true [2021-02-24 00:17:08,588 INFO L192 CegarLoopUtils]: At program point L36-2(lines 25 47) the Hoare annotation is: true [2021-02-24 00:17:08,588 INFO L192 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: true [2021-02-24 00:17:08,588 INFO L192 CegarLoopUtils]: At program point L41-1(line 41) the Hoare annotation is: true [2021-02-24 00:17:08,588 INFO L192 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: true [2021-02-24 00:17:08,588 INFO L192 CegarLoopUtils]: At program point L37-1(line 37) the Hoare annotation is: true [2021-02-24 00:17:08,589 INFO L192 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: true [2021-02-24 00:17:08,589 INFO L192 CegarLoopUtils]: At program point L38(lines 38 45) the Hoare annotation is: true [2021-02-24 00:17:08,589 INFO L192 CegarLoopUtils]: At program point L38-2(lines 36 46) the Hoare annotation is: true [2021-02-24 00:17:08,589 INFO L192 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: true [2021-02-24 00:17:08,589 INFO L185 CegarLoopUtils]: At program point L30-2(line 30) the Hoare annotation is: (<= 1 f_~z~0) [2021-02-24 00:17:08,590 INFO L185 CegarLoopUtils]: At program point L30-3(line 30) the Hoare annotation is: (<= 1 f_~z~0) [2021-02-24 00:17:08,590 INFO L192 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-02-24 00:17:08,590 INFO L185 CegarLoopUtils]: At program point L30-4(line 30) the Hoare annotation is: (<= 1 f_~z~0) [2021-02-24 00:17:08,590 INFO L192 CegarLoopUtils]: At program point L26-1(line 26) the Hoare annotation is: true [2021-02-24 00:17:08,590 INFO L192 CegarLoopUtils]: At program point L26-2(line 26) the Hoare annotation is: true [2021-02-24 00:17:08,591 INFO L192 CegarLoopUtils]: At program point L26-3(line 26) the Hoare annotation is: true [2021-02-24 00:17:08,591 INFO L192 CegarLoopUtils]: At program point L26-4(line 26) the Hoare annotation is: true [2021-02-24 00:17:08,591 INFO L192 CegarLoopUtils]: At program point L26-5(line 26) the Hoare annotation is: true [2021-02-24 00:17:08,591 INFO L192 CegarLoopUtils]: At program point L26-6(line 26) the Hoare annotation is: true [2021-02-24 00:17:08,591 INFO L192 CegarLoopUtils]: At program point L26-7(line 26) the Hoare annotation is: true [2021-02-24 00:17:08,592 INFO L192 CegarLoopUtils]: At program point L26-8(line 26) the Hoare annotation is: true [2021-02-24 00:17:08,592 INFO L192 CegarLoopUtils]: At program point L26-9(line 26) the Hoare annotation is: true [2021-02-24 00:17:08,592 INFO L192 CegarLoopUtils]: At program point L39(lines 39 40) the Hoare annotation is: true [2021-02-24 00:17:08,592 INFO L192 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: true [2021-02-24 00:17:08,592 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:17:08,593 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:17:08,593 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 00:17:08,593 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:17:08,593 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-02-24 00:17:08,593 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-02-24 00:17:08,593 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:17:08,594 INFO L189 CegarLoopUtils]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:17:08,594 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:17:08,594 INFO L192 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: true [2021-02-24 00:17:08,594 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 48 56) the Hoare annotation is: true [2021-02-24 00:17:08,594 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 48 56) the Hoare annotation is: true [2021-02-24 00:17:08,595 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 48 56) the Hoare annotation is: true [2021-02-24 00:17:08,595 INFO L192 CegarLoopUtils]: At program point L53(line 53) the Hoare annotation is: true [2021-02-24 00:17:08,595 INFO L192 CegarLoopUtils]: At program point L53-1(lines 50 54) the Hoare annotation is: true [2021-02-24 00:17:08,595 INFO L192 CegarLoopUtils]: At program point L51(line 51) the Hoare annotation is: true [2021-02-24 00:17:08,595 INFO L192 CegarLoopUtils]: At program point L50(lines 50 54) the Hoare annotation is: true [2021-02-24 00:17:08,595 INFO L192 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-02-24 00:17:08,596 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-02-24 00:17:08,596 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: true [2021-02-24 00:17:08,596 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:17:08,596 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:17:08,597 INFO L185 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-24 00:17:08,597 INFO L185 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:17:08,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:17:08 BoogieIcfgContainer [2021-02-24 00:17:08,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:17:08,617 INFO L168 Benchmark]: Toolchain (without parser) took 2604.70 ms. Allocated memory is still 151.0 MB. Free memory was 127.5 MB in the beginning and 62.6 MB in the end (delta: 64.9 MB). Peak memory consumption was 65.9 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:08,618 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:17:08,618 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.12 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:08,619 INFO L168 Benchmark]: Boogie Preprocessor took 42.22 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:08,620 INFO L168 Benchmark]: RCFGBuilder took 644.64 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 127.7 MB in the end (delta: -12.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:08,621 INFO L168 Benchmark]: TraceAbstraction took 1600.21 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 62.6 MB in the end (delta: 64.5 MB). Peak memory consumption was 66.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:08,625 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 299.12 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.22 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 644.64 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 127.7 MB in the end (delta: -12.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1600.21 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 62.6 MB in the end (delta: 64.5 MB). Peak memory consumption was 66.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 <= z - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 25]: Procedure Contract for f Derived contract for procedure f: 1 - ProcedureContractResult [Line: 48]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 67 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 66 SDslu, 48 SDs, 0 SdLazy, 73 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred 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, 57 LocationsWithAnnotation, 93 PreInvPairs, 130 NumberOfFragments, 102 HoareAnnotationTreeSize, 93 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 57 FomulaSimplificationsInter, 1009 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 62 ConstructedInterpolants, 0 QuantifiedInterpolants, 3782 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...