/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:18:27,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:18:27,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:18:27,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:18:27,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:18:27,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:18:27,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:18:27,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:18:27,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:18:27,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:18:27,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:18:27,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:18:27,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:18:27,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:18:27,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:18:27,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:18:27,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:18:27,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:18:27,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:18:27,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:18:27,560 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:18:27,587 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:18:27,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:18:27,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:18:27,595 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:18:27,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:18:27,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:18:27,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:18:27,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:18:27,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:18:27,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:18:27,598 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:18:27,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:18:27,599 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:18:27,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:18:27,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:18:27,600 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:18:27,600 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:18:27,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:18:27,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:18:27,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:18:27,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:18:27,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:18:27,602 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:18:28,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:18:28,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:18:28,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:18:28,119 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:18:28,120 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:18:28,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_1.c [2021-02-21 21:18:28,219 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f0ccc44b/5e9da824ef6f4f48bd9062061ecf77d7/FLAG471d47cb2 [2021-02-21 21:18:29,047 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:18:29,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_1.c [2021-02-21 21:18:29,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f0ccc44b/5e9da824ef6f4f48bd9062061ecf77d7/FLAG471d47cb2 [2021-02-21 21:18:29,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f0ccc44b/5e9da824ef6f4f48bd9062061ecf77d7 [2021-02-21 21:18:29,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:18:29,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:18:29,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:18:29,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:18:29,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:18:29,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:18:29" (1/1) ... [2021-02-21 21:18:29,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@101215b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:29, skipping insertion in model container [2021-02-21 21:18:29,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:18:29" (1/1) ... [2021-02-21 21:18:29,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:18:29,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:18:29,690 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/while_infinite_loop_1.c[333,346] [2021-02-21 21:18:29,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:18:29,716 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:18:29,729 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/while_infinite_loop_1.c[333,346] [2021-02-21 21:18:29,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:18:29,749 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:18:29,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:29 WrapperNode [2021-02-21 21:18:29,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:18:29,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:18:29,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:18:29,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:18:29,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:29" (1/1) ... [2021-02-21 21:18:29,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:29" (1/1) ... [2021-02-21 21:18:29,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:29" (1/1) ... [2021-02-21 21:18:29,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:29" (1/1) ... [2021-02-21 21:18:29,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:29" (1/1) ... [2021-02-21 21:18:29,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:29" (1/1) ... [2021-02-21 21:18:29,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:29" (1/1) ... [2021-02-21 21:18:29,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:18:29,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:18:29,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:18:29,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:18:29,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:29" (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 [2021-02-21 21:18:29,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:18:29,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:18:29,942 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:18:29,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:18:29,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:18:29,943 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:18:29,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:18:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:18:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:18:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:18:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:18:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:18:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:18:29,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:18:29,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:18:29,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:18:29,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:18:30,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:18:30,368 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:18:30,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:18:30 BoogieIcfgContainer [2021-02-21 21:18:30,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:18:30,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:18:30,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:18:30,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:18:30,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:18:29" (1/3) ... [2021-02-21 21:18:30,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2631ef83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:18:30, skipping insertion in model container [2021-02-21 21:18:30,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:29" (2/3) ... [2021-02-21 21:18:30,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2631ef83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:18:30, skipping insertion in model container [2021-02-21 21:18:30,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:18:30" (3/3) ... [2021-02-21 21:18:30,426 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_1.c [2021-02-21 21:18:30,443 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:18:30,449 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:18:30,478 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:18:30,528 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:18:30,528 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:18:30,528 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:18:30,529 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:18:30,529 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:18:30,529 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:18:30,529 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:18:30,529 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:18:30,562 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-02-21 21:18:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 21:18:30,579 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:30,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:30,581 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:30,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1656700459, now seen corresponding path program 1 times [2021-02-21 21:18:30,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:30,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537332593] [2021-02-21 21:18:30,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:30,729 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:30,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:30,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:30,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:30,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,148 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-21 21:18:31,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:31,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:31,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537332593] [2021-02-21 21:18:31,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:31,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:18:31,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77814652] [2021-02-21 21:18:31,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:18:31,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:31,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:18:31,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:18:31,280 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2021-02-21 21:18:31,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:31,434 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-02-21 21:18:31,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:18:31,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-02-21 21:18:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:31,447 INFO L225 Difference]: With dead ends: 35 [2021-02-21 21:18:31,448 INFO L226 Difference]: Without dead ends: 21 [2021-02-21 21:18:31,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:18:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-02-21 21:18:31,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-02-21 21:18:31,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-02-21 21:18:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-02-21 21:18:31,536 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-02-21 21:18:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:31,537 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-02-21 21:18:31,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:18:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-02-21 21:18:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 21:18:31,541 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:31,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:31,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:18:31,542 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:31,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1654912999, now seen corresponding path program 1 times [2021-02-21 21:18:31,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:31,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697297539] [2021-02-21 21:18:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:31,548 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:31,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:31,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:31,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:31,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:31,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:31,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697297539] [2021-02-21 21:18:31,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:31,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:18:31,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838551782] [2021-02-21 21:18:31,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:18:31,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:31,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:18:31,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:18:31,715 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 6 states. [2021-02-21 21:18:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:31,924 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-02-21 21:18:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 21:18:31,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-02-21 21:18:31,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:31,926 INFO L225 Difference]: With dead ends: 21 [2021-02-21 21:18:31,927 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 21:18:31,931 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 [2021-02-21 21:18:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 21:18:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 21:18:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 21:18:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 21:18:31,933 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-02-21 21:18:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:31,934 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 21:18:31,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:18:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 21:18:31,936 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 21:18:31,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:18:31,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 21:18:32,234 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 21:18:32,234 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 21:18:32,234 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 21:18:32,235 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-21 21:18:32,235 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-21 21:18:32,235 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:18:32,235 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-21 21:18:32,235 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-21 21:18:32,235 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-21 21:18:32,236 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-21 21:18:32,236 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-21 21:18:32,236 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-21 21:18:32,236 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:18:32,237 INFO L185 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: false [2021-02-21 21:18:32,237 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:18:32,237 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 21:18:32,237 INFO L185 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: false [2021-02-21 21:18:32,237 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 12 21) the Hoare annotation is: true [2021-02-21 21:18:32,238 INFO L185 CegarLoopUtils]: At program point mainEXIT(lines 12 21) the Hoare annotation is: false [2021-02-21 21:18:32,238 INFO L185 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: (= main_~x~0 0) [2021-02-21 21:18:32,238 INFO L185 CegarLoopUtils]: At program point L17-1(lines 15 18) the Hoare annotation is: (= main_~x~0 0) [2021-02-21 21:18:32,238 INFO L185 CegarLoopUtils]: At program point L15-2(lines 15 18) the Hoare annotation is: false [2021-02-21 21:18:32,238 INFO L185 CegarLoopUtils]: At program point mainFINAL(lines 12 21) the Hoare annotation is: false [2021-02-21 21:18:32,238 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-21 21:18:32,239 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-21 21:18:32,239 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:18:32,239 INFO L185 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-21 21:18:32,239 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:18:32,239 INFO L185 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-21 21:18:32,240 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:18:32,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:18:32 BoogieIcfgContainer [2021-02-21 21:18:32,266 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:18:32,268 INFO L168 Benchmark]: Toolchain (without parser) took 2861.84 ms. Allocated memory is still 151.0 MB. Free memory was 127.9 MB in the beginning and 98.9 MB in the end (delta: 29.0 MB). Peak memory consumption was 58.2 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:32,270 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.7 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:18:32,271 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.43 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:32,273 INFO L168 Benchmark]: Boogie Preprocessor took 46.33 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:32,274 INFO L168 Benchmark]: RCFGBuilder took 599.08 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 134.2 MB in the end (delta: -17.9 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:32,275 INFO L168 Benchmark]: TraceAbstraction took 1865.28 ms. Allocated memory is still 151.0 MB. Free memory was 134.0 MB in the beginning and 98.9 MB in the end (delta: 35.1 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:32,281 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.7 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 321.43 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.33 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 599.08 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 134.2 MB in the end (delta: -17.9 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1865.28 ms. Allocated memory is still 151.0 MB. Free memory was 134.0 MB in the beginning and 98.9 MB in the end (delta: 35.1 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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: 15]: Loop Invariant Derived loop invariant: x == 0 - ProcedureContractResult [Line: 12]: Procedure Contract for main Derived contract for procedure main: 0 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 17 SDslu, 44 SDs, 0 SdLazy, 27 SolverSat, 6 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, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 27 LocationsWithAnnotation, 41 PreInvPairs, 45 NumberOfFragments, 88 HoareAnnotationTreeSize, 41 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 27 FomulaSimplificationsInter, 235 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...