/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-crafted-1/loopv1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:32:11,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:32:11,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:32:11,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:32:11,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:32:11,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:32:11,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:32:11,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:32:11,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:32:11,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:32:11,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:32:11,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:32:11,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:32:11,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:32:11,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:32:11,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:32:11,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:32:11,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:32:11,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:32:11,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:32:11,563 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 21:32:11,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:32:11,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:32:11,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:32:11,589 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:32:11,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:32:11,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:32:11,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:32:11,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:32:11,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:32:11,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:32:11,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:32:11,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:32:11,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:32:11,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:32:11,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:32:11,592 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:32:11,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:32:11,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:32:11,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:32:11,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:32:11,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:32:11,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:32:11,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:32:11,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:32:12,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:32:12,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:32:12,036 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:32:12,037 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:32:12,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv1.c [2021-02-21 21:32:12,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8ca0ee44/e34a0e1260b04e4a9f0a7098dc328daa/FLAG8796bdc9d [2021-02-21 21:32:12,722 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:32:12,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv1.c [2021-02-21 21:32:12,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8ca0ee44/e34a0e1260b04e4a9f0a7098dc328daa/FLAG8796bdc9d [2021-02-21 21:32:13,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8ca0ee44/e34a0e1260b04e4a9f0a7098dc328daa [2021-02-21 21:32:13,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:32:13,124 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:32:13,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:32:13,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:32:13,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:32:13,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:32:13" (1/1) ... [2021-02-21 21:32:13,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e66bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:13, skipping insertion in model container [2021-02-21 21:32:13,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:32:13" (1/1) ... [2021-02-21 21:32:13,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:32:13,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:32:13,306 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-crafted-1/loopv1.c[456,469] [2021-02-21 21:32:13,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:32:13,326 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:32:13,340 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-crafted-1/loopv1.c[456,469] [2021-02-21 21:32:13,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:32:13,359 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:32:13,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:13 WrapperNode [2021-02-21 21:32:13,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:32:13,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:32:13,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:32:13,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:32:13,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:13" (1/1) ... [2021-02-21 21:32:13,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:13" (1/1) ... [2021-02-21 21:32:13,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:13" (1/1) ... [2021-02-21 21:32:13,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:13" (1/1) ... [2021-02-21 21:32:13,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:13" (1/1) ... [2021-02-21 21:32:13,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:13" (1/1) ... [2021-02-21 21:32:13,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:13" (1/1) ... [2021-02-21 21:32:13,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:32:13,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:32:13,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:32:13,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:32:13,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:13" (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 21:32:13,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:32:13,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:32:13,489 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:32:13,489 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:32:13,489 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:32:13,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:32:13,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:32:13,490 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:32:13,490 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:32:13,490 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:32:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:32:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:32:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:32:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:32:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:32:13,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:32:13,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:32:13,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:32:13,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:32:13,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:32:13,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:32:13,727 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:32:13,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:32:13 BoogieIcfgContainer [2021-02-21 21:32:13,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:32:13,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:32:13,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:32:13,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:32:13,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:32:13" (1/3) ... [2021-02-21 21:32:13,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d90948b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:32:13, skipping insertion in model container [2021-02-21 21:32:13,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:13" (2/3) ... [2021-02-21 21:32:13,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d90948b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:32:13, skipping insertion in model container [2021-02-21 21:32:13,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:32:13" (3/3) ... [2021-02-21 21:32:13,739 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv1.c [2021-02-21 21:32:13,747 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:32:13,753 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:32:13,796 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:32:13,823 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:32:13,824 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:32:13,824 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:32:13,824 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:32:13,824 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:32:13,825 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:32:13,825 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:32:13,825 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:32:13,843 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2021-02-21 21:32:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 21:32:13,854 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:13,855 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] [2021-02-21 21:32:13,856 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:13,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:13,863 INFO L82 PathProgramCache]: Analyzing trace with hash -930868670, now seen corresponding path program 1 times [2021-02-21 21:32:13,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:13,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149639563] [2021-02-21 21:32:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:14,013 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:32:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:14,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:14,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:14,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:14,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:14,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:14,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:14,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:14,253 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 21:32:14,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149639563] [2021-02-21 21:32:14,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:14,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:32:14,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60586848] [2021-02-21 21:32:14,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:32:14,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:14,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:32:14,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:32:14,286 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2021-02-21 21:32:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:14,396 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-02-21 21:32:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:32:14,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2021-02-21 21:32:14,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:14,414 INFO L225 Difference]: With dead ends: 55 [2021-02-21 21:32:14,414 INFO L226 Difference]: Without dead ends: 34 [2021-02-21 21:32:14,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:32:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-21 21:32:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-02-21 21:32:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-21 21:32:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-02-21 21:32:14,513 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2021-02-21 21:32:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:14,513 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-02-21 21:32:14,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:32:14,514 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-02-21 21:32:14,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 21:32:14,515 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:14,515 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] [2021-02-21 21:32:14,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:32:14,516 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:14,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:14,517 INFO L82 PathProgramCache]: Analyzing trace with hash -944721485, now seen corresponding path program 1 times [2021-02-21 21:32:14,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:14,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693831493] [2021-02-21 21:32:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:14,526 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:32:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:14,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:14,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:14,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:14,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:32:14,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:14,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:32:14,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:14,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:32:14,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:14,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:14,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:14,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:14,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:14,702 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 21:32:14,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693831493] [2021-02-21 21:32:14,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:14,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:32:14,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725742107] [2021-02-21 21:32:14,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:32:14,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:14,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:32:14,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:32:14,706 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 6 states. [2021-02-21 21:32:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:15,020 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-02-21 21:32:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 21:32:15,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2021-02-21 21:32:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:15,026 INFO L225 Difference]: With dead ends: 46 [2021-02-21 21:32:15,027 INFO L226 Difference]: Without dead ends: 41 [2021-02-21 21:32:15,030 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 21:32:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-02-21 21:32:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2021-02-21 21:32:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-21 21:32:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-02-21 21:32:15,059 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 27 [2021-02-21 21:32:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:15,060 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-02-21 21:32:15,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:32:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-02-21 21:32:15,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-21 21:32:15,067 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:15,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:32:15,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:32:15,073 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:15,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:15,074 INFO L82 PathProgramCache]: Analyzing trace with hash 849742705, now seen corresponding path program 1 times [2021-02-21 21:32:15,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:15,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771588956] [2021-02-21 21:32:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:17,252 WARN L141 QuantifierPusher]: treesize reduction 8, result has 92.3 percent of original size [2021-02-21 21:32:17,283 WARN L147 QuantifierPusher]: treesize reduction 8, result has 92.3 percent of original size 96 [2021-02-21 21:32:19,399 WARN L141 QuantifierPusher]: treesize reduction 8, result has 91.7 percent of original size [2021-02-21 21:32:19,405 WARN L147 QuantifierPusher]: treesize reduction 8, result has 91.7 percent of original size 88 [2021-02-21 21:32:19,406 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:32:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:19,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:19,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:19,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:19,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:32:19,649 WARN L141 QuantifierPusher]: treesize reduction 60, result has 24.1 percent of original size [2021-02-21 21:32:19,650 WARN L147 QuantifierPusher]: treesize reduction 60, result has 24.1 percent of original size 19 [2021-02-21 21:32:19,669 WARN L141 QuantifierPusher]: treesize reduction 35, result has 60.7 percent of original size [2021-02-21 21:32:19,672 WARN L147 QuantifierPusher]: treesize reduction 35, result has 60.7 percent of original size 54 [2021-02-21 21:32:19,720 WARN L141 QuantifierPusher]: treesize reduction 35, result has 58.3 percent of original size [2021-02-21 21:32:19,725 WARN L147 QuantifierPusher]: treesize reduction 35, result has 58.3 percent of original size 49 [2021-02-21 21:32:19,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:19,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:32:19,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:19,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:32:19,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:19,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:19,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:19,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:19,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:19,796 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 21:32:19,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:19,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:32:19,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:19,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-02-21 21:32:19,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:32:19,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:19,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:32:19,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:32:19,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:19,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:19,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-02-21 21:32:19,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:19,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:32:19,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:19,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-02-21 21:32:19,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-02-21 21:32:22,888 WARN L202 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 99 DAG size of output: 47 [2021-02-21 21:32:24,945 WARN L202 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 47 [2021-02-21 21:32:24,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:24,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:32:24,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:24,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-02-21 21:32:24,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:32:24,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:24,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:24,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-02-21 21:32:27,915 WARN L202 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-02-21 21:32:27,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:27,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:32:27,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:27,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-02-21 21:32:27,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-02-21 21:32:29,149 WARN L202 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 48 [2021-02-21 21:32:29,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:29,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:32:29,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:29,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-02-21 21:32:29,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-02-21 21:32:30,962 WARN L202 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 50 [2021-02-21 21:32:30,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:30,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:32:30,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:30,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-02-21 21:32:30,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:32:30,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:30,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:30,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-02-21 21:32:31,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:32:31,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-02-21 21:32:31,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-02-21 21:32:33,926 WARN L202 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 44 [2021-02-21 21:32:33,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:33,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771588956] [2021-02-21 21:32:33,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:33,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 21:32:33,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619639632] [2021-02-21 21:32:33,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 21:32:33,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:33,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 21:32:33,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=112, Unknown=1, NotChecked=0, Total=156 [2021-02-21 21:32:33,932 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2021-02-21 21:32:45,098 WARN L202 SmtUtils]: Spent 10.79 s on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2021-02-21 21:32:57,657 WARN L202 SmtUtils]: Spent 12.46 s on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-02-21 21:33:11,462 WARN L202 SmtUtils]: Spent 13.28 s on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-02-21 21:33:27,655 WARN L202 SmtUtils]: Spent 16.09 s on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-02-21 21:33:34,998 WARN L202 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 77 [2021-02-21 21:33:48,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:48,342 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-02-21 21:33:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 21:33:48,343 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2021-02-21 21:33:48,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:48,343 INFO L225 Difference]: With dead ends: 57 [2021-02-21 21:33:48,343 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 21:33:48,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 70.6s TimeCoverageRelationStatistics Valid=157, Invalid=440, Unknown=3, NotChecked=0, Total=600 [2021-02-21 21:33:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 21:33:48,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 21:33:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 21:33:48,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 21:33:48,346 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-02-21 21:33:48,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:48,346 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 21:33:48,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 21:33:48,346 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 21:33:48,346 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 21:33:48,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:33:48,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 21:33:49,182 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 12 [2021-02-21 21:33:49,537 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 12 [2021-02-21 21:33:49,548 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2021-02-21 21:33:49,549 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2021-02-21 21:33:49,549 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2021-02-21 21:33:49,549 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:33:49,549 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-21 21:33:49,550 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-02-21 21:33:49,550 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)|) (= ~SIZE~0 |old(~SIZE~0)|) (= |#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 21:33:49,550 INFO L192 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: true [2021-02-21 21:33:49,550 INFO L192 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: true [2021-02-21 21:33:49,550 INFO L192 CegarLoopUtils]: At program point L7-2(line 7) the Hoare annotation is: true [2021-02-21 21:33:49,550 INFO L192 CegarLoopUtils]: At program point L7-3(line 7) the Hoare annotation is: true [2021-02-21 21:33:49,551 INFO L192 CegarLoopUtils]: At program point L7-4(line 7) the Hoare annotation is: true [2021-02-21 21:33:49,551 INFO L192 CegarLoopUtils]: At program point L7-5(line 7) the Hoare annotation is: true [2021-02-21 21:33:49,551 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:33:49,551 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:33:49,551 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:33:49,551 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 21:33:49,551 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-21 21:33:49,551 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 9 11) no Hoare annotation was computed. [2021-02-21 21:33:49,551 INFO L189 CegarLoopUtils]: For program point L10(line 10) no Hoare annotation was computed. [2021-02-21 21:33:49,552 INFO L189 CegarLoopUtils]: For program point L10-1(line 10) no Hoare annotation was computed. [2021-02-21 21:33:49,552 INFO L189 CegarLoopUtils]: For program point L10-3(lines 9 11) no Hoare annotation was computed. [2021-02-21 21:33:49,552 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2021-02-21 21:33:49,552 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (<= (+ (* 3 (div (+ (* main_~i~0 2) (- 22)) 3)) 24) (* 2 main_~i~0)) [2021-02-21 21:33:49,552 INFO L185 CegarLoopUtils]: At program point L27-1(lines 27 30) the Hoare annotation is: (<= (+ (* 3 (div (+ (* main_~i~0 2) (- 22)) 3)) 24) (* 2 main_~i~0)) [2021-02-21 21:33:49,552 INFO L185 CegarLoopUtils]: At program point L27-2(line 27) the Hoare annotation is: (<= (+ (* 3 (div (+ (* main_~i~0 2) (- 22)) 3)) 24) (* 2 main_~i~0)) [2021-02-21 21:33:49,552 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 20 34) the Hoare annotation is: true [2021-02-21 21:33:49,552 INFO L192 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: true [2021-02-21 21:33:49,553 INFO L185 CegarLoopUtils]: At program point L27-4(line 27) the Hoare annotation is: (<= (+ (* 3 (div (+ (* main_~i~0 2) (- 22)) 3)) 24) (* 2 main_~i~0)) [2021-02-21 21:33:49,553 INFO L185 CegarLoopUtils]: At program point L25-2(lines 25 31) the Hoare annotation is: (<= (+ (* 3 (div (+ (* main_~i~0 2) (- 22)) 3)) 24) (* 2 main_~i~0)) [2021-02-21 21:33:49,553 INFO L192 CegarLoopUtils]: At program point L23-1(line 23) the Hoare annotation is: true [2021-02-21 21:33:49,553 INFO L185 CegarLoopUtils]: At program point L27-5(lines 25 31) the Hoare annotation is: (<= (+ (* 3 (div (+ (* main_~i~0 2) (- 22)) 3)) 24) (* 2 main_~i~0)) [2021-02-21 21:33:49,553 INFO L192 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-02-21 21:33:49,553 INFO L192 CegarLoopUtils]: At program point L21-1(line 21) the Hoare annotation is: true [2021-02-21 21:33:49,553 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 20 34) the Hoare annotation is: true [2021-02-21 21:33:49,554 INFO L192 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: true [2021-02-21 21:33:49,554 INFO L185 CegarLoopUtils]: At program point L30(line 30) the Hoare annotation is: (<= (+ (* 3 (div (+ (* main_~i~0 2) (- 22)) 3)) 24) (* 2 main_~i~0)) [2021-02-21 21:33:49,554 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 20 34) the Hoare annotation is: true [2021-02-21 21:33:49,554 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (<= (+ (* 3 (div (+ (* main_~i~0 2) (- 22)) 3)) 24) (* 2 main_~i~0)) [2021-02-21 21:33:49,554 INFO L192 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: true [2021-02-21 21:33:49,554 INFO L185 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (= main_~i~0 0) [2021-02-21 21:33:49,554 INFO L192 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-02-21 21:33:49,554 INFO L192 CegarLoopUtils]: At program point L22-1(line 22) the Hoare annotation is: true [2021-02-21 21:33:49,555 INFO L192 CegarLoopUtils]: At program point L22-2(line 22) the Hoare annotation is: true [2021-02-21 21:33:49,555 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 12 17) the Hoare annotation is: true [2021-02-21 21:33:49,555 INFO L185 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:33:49,555 INFO L185 CegarLoopUtils]: At program point L13(lines 13 15) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-21 21:33:49,555 INFO L185 CegarLoopUtils]: At program point L14-1(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:33:49,555 INFO L192 CegarLoopUtils]: At program point L13-2(lines 12 17) the Hoare annotation is: true [2021-02-21 21:33:49,555 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 12 17) the Hoare annotation is: true [2021-02-21 21:33:49,556 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:33:49,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:33:49 BoogieIcfgContainer [2021-02-21 21:33:49,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:33:49,576 INFO L168 Benchmark]: Toolchain (without parser) took 96463.60 ms. Allocated memory was 174.1 MB in the beginning and 209.7 MB in the end (delta: 35.7 MB). Free memory was 150.2 MB in the beginning and 84.5 MB in the end (delta: 65.7 MB). Peak memory consumption was 115.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:33:49,577 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 174.1 MB. Free memory is still 147.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:33:49,577 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.94 ms. Allocated memory is still 174.1 MB. Free memory was 149.2 MB in the beginning and 139.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:33:49,578 INFO L168 Benchmark]: Boogie Preprocessor took 34.56 ms. Allocated memory is still 174.1 MB. Free memory was 139.6 MB in the beginning and 138.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:33:49,579 INFO L168 Benchmark]: RCFGBuilder took 333.50 ms. Allocated memory is still 174.1 MB. Free memory was 138.2 MB in the beginning and 122.9 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-21 21:33:49,580 INFO L168 Benchmark]: TraceAbstraction took 95843.07 ms. Allocated memory was 174.1 MB in the beginning and 209.7 MB in the end (delta: 35.7 MB). Free memory was 122.5 MB in the beginning and 84.5 MB in the end (delta: 38.0 MB). Peak memory consumption was 88.3 MB. Max. memory is 8.0 GB. [2021-02-21 21:33:49,583 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 174.1 MB. Free memory is still 147.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 229.94 ms. Allocated memory is still 174.1 MB. Free memory was 149.2 MB in the beginning and 139.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.56 ms. Allocated memory is still 174.1 MB. Free memory was 139.6 MB in the beginning and 138.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 333.50 ms. Allocated memory is still 174.1 MB. Free memory was 138.2 MB in the beginning and 122.9 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 95843.07 ms. Allocated memory was 174.1 MB in the beginning and 209.7 MB in the end (delta: 35.7 MB). Free memory was 122.5 MB in the beginning and 84.5 MB in the end (delta: 38.0 MB). Peak memory consumption was 88.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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: 25]: Loop Invariant Derived loop invariant: 3 * ((i * 2 + -22) / 3) + 24 <= 2 * i - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 94.5s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 74.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 147 SDslu, 106 SDs, 0 SdLazy, 226 SolverSat, 25 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 14.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 70.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 43 LocationsWithAnnotation, 71 PreInvPairs, 109 NumberOfFragments, 203 HoareAnnotationTreeSize, 71 FomulaSimplifications, 1776 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 43 FomulaSimplificationsInter, 3261 FormulaSimplificationTreeSizeReductionInter, 0.8s 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...