/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/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:58:49,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:58:49,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:58:49,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:58:49,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:58:49,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:58:49,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:58:49,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:58:49,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:58:49,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:58:49,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:58:49,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:58:49,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:58:49,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:58:49,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:58:49,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:58:49,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:58:49,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:58:49,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:58:49,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:58:49,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:58:49,850 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:58:49,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:58:49,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:58:49,860 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:58:49,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:58:49,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:58:49,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:58:49,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:58:49,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:58:49,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:58:49,862 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:58:49,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:58:49,867 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:58:49,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:58:49,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:58:49,868 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:58:49,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:58:49,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:58:49,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:58:49,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:58:49,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:58:49,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:58:49,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:58:50,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:58:50,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:58:50,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:58:50,512 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:58:50,513 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:58:50,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2021-02-23 18:58:50,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7836066/15d1a91b02cb47038ca73e078ff66fa9/FLAG42728454c [2021-02-23 18:58:51,684 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:58:51,685 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2021-02-23 18:58:51,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7836066/15d1a91b02cb47038ca73e078ff66fa9/FLAG42728454c [2021-02-23 18:58:51,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7836066/15d1a91b02cb47038ca73e078ff66fa9 [2021-02-23 18:58:51,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:58:51,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:58:51,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:58:51,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:58:51,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:58:51,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:58:51" (1/1) ... [2021-02-23 18:58:51,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b80de2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:58:51, skipping insertion in model container [2021-02-23 18:58:51,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:58:51" (1/1) ... [2021-02-23 18:58:51,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:58:51,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:58:52,082 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i[895,908] [2021-02-23 18:58:52,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:58:52,142 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:58:52,173 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i[895,908] [2021-02-23 18:58:52,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:58:52,225 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:58:52,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:58:52 WrapperNode [2021-02-23 18:58:52,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:58:52,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:58:52,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:58:52,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:58:52,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:58:52" (1/1) ... [2021-02-23 18:58:52,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:58:52" (1/1) ... [2021-02-23 18:58:52,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:58:52" (1/1) ... [2021-02-23 18:58:52,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:58:52" (1/1) ... [2021-02-23 18:58:52,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:58:52" (1/1) ... [2021-02-23 18:58:52,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:58:52" (1/1) ... [2021-02-23 18:58:52,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:58:52" (1/1) ... [2021-02-23 18:58:52,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:58:52,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:58:52,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:58:52,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:58:52,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:58:52" (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 [2021-02-23 18:58:52,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:58:52,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:58:52,519 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:58:52,519 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 18:58:52,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 18:58:52,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:58:52,520 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:58:52,520 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:58:52,521 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 18:58:52,522 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 18:58:52,522 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:58:52,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:58:52,522 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 18:58:52,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:58:52,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:58:52,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:58:52,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:58:52,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:58:52,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:58:52,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:58:52,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:58:52,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:58:53,184 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:58:53,188 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:58:53,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:58:53 BoogieIcfgContainer [2021-02-23 18:58:53,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:58:53,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:58:53,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:58:53,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:58:53,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:58:51" (1/3) ... [2021-02-23 18:58:53,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e096ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:58:53, skipping insertion in model container [2021-02-23 18:58:53,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:58:52" (2/3) ... [2021-02-23 18:58:53,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e096ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:58:53, skipping insertion in model container [2021-02-23 18:58:53,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:58:53" (3/3) ... [2021-02-23 18:58:53,254 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2021-02-23 18:58:53,274 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:58:53,283 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:58:53,319 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:58:53,382 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:58:53,383 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:58:53,383 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:58:53,383 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:58:53,383 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:58:53,384 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:58:53,384 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:58:53,384 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:58:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2021-02-23 18:58:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 18:58:53,450 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:58:53,452 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] [2021-02-23 18:58:53,453 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:58:53,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:58:53,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1543512865, now seen corresponding path program 1 times [2021-02-23 18:58:53,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:58:53,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467693513] [2021-02-23 18:58:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:58:53,637 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:58:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:58:53,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:53,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:58:53,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:53,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:58:54,072 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-02-23 18:58:54,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:58:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:58:54,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:54,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:58:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:58:54,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467693513] [2021-02-23 18:58:54,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:58:54,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 18:58:54,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921452778] [2021-02-23 18:58:54,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 18:58:54,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:58:54,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 18:58:54,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:58:54,231 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2021-02-23 18:58:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:58:54,445 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-02-23 18:58:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 18:58:54,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-02-23 18:58:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:58:54,463 INFO L225 Difference]: With dead ends: 50 [2021-02-23 18:58:54,464 INFO L226 Difference]: Without dead ends: 31 [2021-02-23 18:58:54,470 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 [2021-02-23 18:58:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-23 18:58:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-02-23 18:58:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-23 18:58:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-02-23 18:58:54,550 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 21 [2021-02-23 18:58:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:58:54,551 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-02-23 18:58:54,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 18:58:54,552 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-02-23 18:58:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 18:58:54,553 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:58:54,554 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] [2021-02-23 18:58:54,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:58:54,554 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:58:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:58:54,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1557365680, now seen corresponding path program 1 times [2021-02-23 18:58:54,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:58:54,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470707057] [2021-02-23 18:58:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:58:54,562 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:58:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:58:54,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:54,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:58:54,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:54,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:58:54,705 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-23 18:58:54,707 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-23 18:58:54,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:54,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:58:54,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:54,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:58:54,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:54,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:58:54,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:58:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:58:54,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:54,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:58:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:58:54,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470707057] [2021-02-23 18:58:54,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:58:54,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 18:58:54,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849834027] [2021-02-23 18:58:54,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 18:58:54,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:58:54,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 18:58:54,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:58:54,800 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states. [2021-02-23 18:58:55,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:58:55,155 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-02-23 18:58:55,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:58:55,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2021-02-23 18:58:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:58:55,163 INFO L225 Difference]: With dead ends: 46 [2021-02-23 18:58:55,163 INFO L226 Difference]: Without dead ends: 38 [2021-02-23 18:58:55,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-23 18:58:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-23 18:58:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-02-23 18:58:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-02-23 18:58:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-02-23 18:58:55,220 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 21 [2021-02-23 18:58:55,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:58:55,225 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-02-23 18:58:55,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 18:58:55,226 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-02-23 18:58:55,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 18:58:55,231 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:58:55,231 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] [2021-02-23 18:58:55,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:58:55,232 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:58:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:58:55,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2003455287, now seen corresponding path program 1 times [2021-02-23 18:58:55,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:58:55,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935621416] [2021-02-23 18:58:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:58:57,697 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-02-23 18:58:57,713 WARN L141 QuantifierPusher]: treesize reduction 6, result has 94.7 percent of original size [2021-02-23 18:58:57,796 WARN L147 QuantifierPusher]: treesize reduction 6, result has 94.7 percent of original size 108 [2021-02-23 18:59:00,042 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-02-23 18:59:00,052 WARN L141 QuantifierPusher]: treesize reduction 6, result has 94.3 percent of original size [2021-02-23 18:59:00,064 WARN L147 QuantifierPusher]: treesize reduction 6, result has 94.3 percent of original size 100 [2021-02-23 18:59:00,065 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:59:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:59:00,116 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:59:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:59:00,153 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:59:00,192 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:59:00,192 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:59:00,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:59:00,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:59:00 BoogieIcfgContainer [2021-02-23 18:59:00,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:59:00,234 INFO L168 Benchmark]: Toolchain (without parser) took 8498.12 ms. Allocated memory was 153.1 MB in the beginning and 192.9 MB in the end (delta: 39.8 MB). Free memory was 129.7 MB in the beginning and 149.3 MB in the end (delta: -19.7 MB). Peak memory consumption was 20.3 MB. Max. memory is 8.0 GB. [2021-02-23 18:59:00,237 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 153.1 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:59:00,240 INFO L168 Benchmark]: CACSL2BoogieTranslator took 478.08 ms. Allocated memory is still 153.1 MB. Free memory was 128.4 MB in the beginning and 119.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:59:00,244 INFO L168 Benchmark]: Boogie Preprocessor took 100.93 ms. Allocated memory is still 153.1 MB. Free memory was 119.0 MB in the beginning and 117.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:59:00,247 INFO L168 Benchmark]: RCFGBuilder took 861.68 ms. Allocated memory is still 153.1 MB. Free memory was 117.4 MB in the beginning and 102.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-23 18:59:00,255 INFO L168 Benchmark]: TraceAbstraction took 6991.39 ms. Allocated memory was 153.1 MB in the beginning and 192.9 MB in the end (delta: 39.8 MB). Free memory was 136.5 MB in the beginning and 149.3 MB in the end (delta: -12.9 MB). Peak memory consumption was 27.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:59:00,269 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 153.1 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 478.08 ms. Allocated memory is still 153.1 MB. Free memory was 128.4 MB in the beginning and 119.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 100.93 ms. Allocated memory is still 153.1 MB. Free memory was 119.0 MB in the beginning and 117.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 861.68 ms. Allocated memory is still 153.1 MB. Free memory was 117.4 MB in the beginning and 102.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6991.39 ms. Allocated memory was 153.1 MB in the beginning and 192.9 MB in the end (delta: 39.8 MB). Free memory was 136.5 MB in the beginning and 149.3 MB in the end (delta: -12.9 MB). Peak memory consumption was 27.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int x = 0; [L26] int m = 0; [L27] int n = __VERIFIER_nondet_int(); [L28] COND TRUE x < n [L29] COND TRUE __VERIFIER_nondet_int() [L30] m = x [L32] x = x + 1 [L28] COND FALSE !(x < n) [L34] CALL __VERIFIER_assert((m >= 0 || n <= 0)) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 69 SDslu, 57 SDs, 0 SdLazy, 93 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 incorrect! Received shutdown request...