/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_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:58:39,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:58:39,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:58:39,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 01:58:39,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:58:39,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:58:39,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:58:39,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:58:39,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:58:39,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:58:39,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:58:39,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:58:39,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:58:39,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:58:39,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:58:39,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:58:39,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:58:39,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:58:39,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:58:39,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:58:39,441 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 01:58:39,484 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:58:39,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:58:39,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:58:39,491 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:58:39,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:58:39,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:58:39,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:58:39,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:58:39,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:58:39,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:58:39,493 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:58:39,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:58:39,494 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:58:39,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:58:39,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:58:39,495 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:58:39,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:58:39,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:58:39,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:58:39,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:58:39,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:58:39,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:58:39,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:58:39,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:58:39,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:58:39,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:58:39,927 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:58:39,927 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:58:39,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_2.c [2020-11-07 01:58:40,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/466a1f88a/0e8a4318000b44708923c5f0e9a9dee2/FLAG7ac0b9f3f [2020-11-07 01:58:40,696 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:58:40,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_2.c [2020-11-07 01:58:40,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/466a1f88a/0e8a4318000b44708923c5f0e9a9dee2/FLAG7ac0b9f3f [2020-11-07 01:58:41,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/466a1f88a/0e8a4318000b44708923c5f0e9a9dee2 [2020-11-07 01:58:41,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:58:41,060 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:58:41,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:58:41,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:58:41,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:58:41,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:41" (1/1) ... [2020-11-07 01:58:41,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a5d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:41, skipping insertion in model container [2020-11-07 01:58:41,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:41" (1/1) ... [2020-11-07 01:58:41,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:58:41,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:58:41,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:58:41,282 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:58:41,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:58:41,315 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:58:41,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:41 WrapperNode [2020-11-07 01:58:41,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:58:41,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:58:41,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:58:41,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:58:41,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:41" (1/1) ... [2020-11-07 01:58:41,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:41" (1/1) ... [2020-11-07 01:58:41,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:41" (1/1) ... [2020-11-07 01:58:41,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:41" (1/1) ... [2020-11-07 01:58:41,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:41" (1/1) ... [2020-11-07 01:58:41,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:41" (1/1) ... [2020-11-07 01:58:41,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:41" (1/1) ... [2020-11-07 01:58:41,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:58:41,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:58:41,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:58:41,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:58:41,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:41" (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 [2020-11-07 01:58:41,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:58:41,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:58:41,479 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:58:41,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:58:41,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:58:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:58:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:58:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:58:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:58:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:58:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:58:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:58:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:58:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:58:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:58:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:58:41,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:58:41,769 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:58:41,769 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 01:58:41,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:41 BoogieIcfgContainer [2020-11-07 01:58:41,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:58:41,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:58:41,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:58:41,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:58:41,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:58:41" (1/3) ... [2020-11-07 01:58:41,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24821bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:41, skipping insertion in model container [2020-11-07 01:58:41,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:41" (2/3) ... [2020-11-07 01:58:41,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24821bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:41, skipping insertion in model container [2020-11-07 01:58:41,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:41" (3/3) ... [2020-11-07 01:58:41,782 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_2.c [2020-11-07 01:58:41,802 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:58:41,806 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:58:41,819 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:58:41,849 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:58:41,849 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:58:41,849 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:58:41,849 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:58:41,849 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:58:41,850 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:58:41,850 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:58:41,850 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:58:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-07 01:58:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-07 01:58:41,879 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:41,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:41,880 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:41,888 INFO L82 PathProgramCache]: Analyzing trace with hash -212031429, now seen corresponding path program 1 times [2020-11-07 01:58:41,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:41,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962931973] [2020-11-07 01:58:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:41,993 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:42,376 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-11-07 01:58:42,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:42,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962931973] [2020-11-07 01:58:42,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:42,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 01:58:42,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978331565] [2020-11-07 01:58:42,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 01:58:42,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:42,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 01:58:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:58:42,477 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-11-07 01:58:42,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:42,554 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-11-07 01:58:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 01:58:42,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-07 01:58:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:42,565 INFO L225 Difference]: With dead ends: 39 [2020-11-07 01:58:42,565 INFO L226 Difference]: Without dead ends: 22 [2020-11-07 01:58:42,569 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 [2020-11-07 01:58:42,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-07 01:58:42,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-07 01:58:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-07 01:58:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-11-07 01:58:42,623 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-11-07 01:58:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:42,624 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-11-07 01:58:42,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 01:58:42,624 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-11-07 01:58:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-07 01:58:42,625 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:42,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:42,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:58:42,626 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:42,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:42,627 INFO L82 PathProgramCache]: Analyzing trace with hash -156620169, now seen corresponding path program 1 times [2020-11-07 01:58:42,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:42,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959162654] [2020-11-07 01:58:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:42,631 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:42,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:42,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959162654] [2020-11-07 01:58:42,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:42,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 01:58:42,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704188269] [2020-11-07 01:58:42,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 01:58:42,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:42,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 01:58:42,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:58:42,790 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-11-07 01:58:42,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:42,946 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-11-07 01:58:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 01:58:42,946 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-11-07 01:58:42,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:42,947 INFO L225 Difference]: With dead ends: 22 [2020-11-07 01:58:42,947 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 01:58:42,950 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 [2020-11-07 01:58:42,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 01:58:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 01:58:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 01:58:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 01:58:42,951 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-11-07 01:58:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:42,951 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 01:58:42,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 01:58:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 01:58:42,952 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 01:58:42,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:58:42,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 01:58:43,233 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 3) the Hoare annotation is: true [2020-11-07 01:58:43,233 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-07 01:58:43,233 INFO L269 CegarLoopResult]: At program point reach_errorFINAL(line 3) the Hoare annotation is: true [2020-11-07 01:58:43,234 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) the Hoare annotation is: true [2020-11-07 01:58:43,234 INFO L269 CegarLoopResult]: At program point L3-2(line 3) the Hoare annotation is: true [2020-11-07 01:58:43,234 INFO L269 CegarLoopResult]: At program point L3-3(line 3) the Hoare annotation is: true [2020-11-07 01:58:43,234 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 01:58:43,234 INFO L269 CegarLoopResult]: At program point L3-4(line 3) the Hoare annotation is: true [2020-11-07 01:58:43,234 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 01:58:43,235 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2020-11-07 01:58:43,235 INFO L262 CegarLoopResult]: 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|)) [2020-11-07 01:58:43,235 INFO L269 CegarLoopResult]: At program point L3(line 3) the Hoare annotation is: true [2020-11-07 01:58:43,235 INFO L269 CegarLoopResult]: At program point L3-1(line 3) the Hoare annotation is: true [2020-11-07 01:58:43,236 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 01:58:43,236 INFO L262 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: false [2020-11-07 01:58:43,236 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 01:58:43,236 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 01:58:43,236 INFO L262 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: false [2020-11-07 01:58:43,237 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 11 20) the Hoare annotation is: true [2020-11-07 01:58:43,237 INFO L262 CegarLoopResult]: At program point mainEXIT(lines 11 20) the Hoare annotation is: false [2020-11-07 01:58:43,237 INFO L262 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= main_~x~0 0) [2020-11-07 01:58:43,237 INFO L262 CegarLoopResult]: At program point L16-1(lines 14 17) the Hoare annotation is: (= main_~x~0 0) [2020-11-07 01:58:43,237 INFO L262 CegarLoopResult]: At program point mainFINAL(lines 11 20) the Hoare annotation is: false [2020-11-07 01:58:43,238 INFO L262 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: false [2020-11-07 01:58:43,238 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-11-07 01:58:43,238 INFO L262 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 01:58:43,238 INFO L262 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 01:58:43,239 INFO L262 CegarLoopResult]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 01:58:43,239 INFO L262 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 01:58:43,239 INFO L262 CegarLoopResult]: At program point L6-2(lines 5 10) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 01:58:43,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:58:43 BoogieIcfgContainer [2020-11-07 01:58:43,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 01:58:43,264 INFO L168 Benchmark]: Toolchain (without parser) took 2209.09 ms. Allocated memory is still 155.2 MB. Free memory was 114.3 MB in the beginning and 82.0 MB in the end (delta: 32.3 MB). Peak memory consumption was 32.8 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:43,265 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 155.2 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 01:58:43,266 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.45 ms. Allocated memory is still 155.2 MB. Free memory was 140.2 MB in the beginning and 131.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:43,267 INFO L168 Benchmark]: Boogie Preprocessor took 35.73 ms. Allocated memory is still 155.2 MB. Free memory was 131.3 MB in the beginning and 129.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:43,269 INFO L168 Benchmark]: RCFGBuilder took 418.32 ms. Allocated memory is still 155.2 MB. Free memory was 129.9 MB in the beginning and 128.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:43,270 INFO L168 Benchmark]: TraceAbstraction took 1488.16 ms. Allocated memory is still 155.2 MB. Free memory was 127.3 MB in the beginning and 82.0 MB in the end (delta: 45.3 MB). Peak memory consumption was 45.6 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:43,275 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 155.2 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 241.45 ms. Allocated memory is still 155.2 MB. Free memory was 140.2 MB in the beginning and 131.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.73 ms. Allocated memory is still 155.2 MB. Free memory was 131.3 MB in the beginning and 129.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 418.32 ms. Allocated memory is still 155.2 MB. Free memory was 129.9 MB in the beginning and 128.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1488.16 ms. Allocated memory is still 155.2 MB. Free memory was 127.3 MB in the beginning and 82.0 MB in the end (delta: 45.3 MB). Peak memory consumption was 45.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 14]: Loop Invariant Derived loop invariant: x == 0 - ProcedureContractResult [Line: 3]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 11]: 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: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 17 SDslu, 44 SDs, 0 SdLazy, 27 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s 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=30occurred 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, 30 LocationsWithAnnotation, 46 PreInvPairs, 50 NumberOfFragments, 89 HoareAnnotationTreeSize, 46 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 30 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...