/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-invariants/mod4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 19:05:00,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 19:05:00,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 19:05:01,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 19:05:01,116 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 19:05:01,133 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 19:05:01,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 19:05:01,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 19:05:01,136 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 19:05:01,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 19:05:01,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 19:05:01,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 19:05:01,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 19:05:01,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 19:05:01,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 19:05:01,137 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 19:05:01,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 19:05:01,137 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 19:05:01,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 19:05:01,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 19:05:01,138 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 19:05:01,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 19:05:01,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 19:05:01,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:05:01,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 19:05:01,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 19:05:01,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 19:05:01,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 19:05:01,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 19:05:01,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 19:05:01,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 19:05:01,520 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 19:05:01,521 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 19:05:01,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/mod4.c [2021-02-23 19:05:01,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3e94b8a/a9857496310a432dad868fb666e310d7/FLAG12e852318 [2021-02-23 19:05:02,179 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:05:02,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/mod4.c [2021-02-23 19:05:02,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3e94b8a/a9857496310a432dad868fb666e310d7/FLAG12e852318 [2021-02-23 19:05:02,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3e94b8a/a9857496310a432dad868fb666e310d7 [2021-02-23 19:05:02,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:05:02,547 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:05:02,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:05:02,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:05:02,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:05:02,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:05:02" (1/1) ... [2021-02-23 19:05:02,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f4d749e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:02, skipping insertion in model container [2021-02-23 19:05:02,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:05:02" (1/1) ... [2021-02-23 19:05:02,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:05:02,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:05:02,818 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-invariants/mod4.c[351,364] [2021-02-23 19:05:02,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:05:02,848 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:05:02,867 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-invariants/mod4.c[351,364] [2021-02-23 19:05:02,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:05:02,887 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:05:02,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:02 WrapperNode [2021-02-23 19:05:02,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:05:02,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:05:02,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:05:02,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:05:02,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:02" (1/1) ... [2021-02-23 19:05:02,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:02" (1/1) ... [2021-02-23 19:05:02,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:02" (1/1) ... [2021-02-23 19:05:02,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:02" (1/1) ... [2021-02-23 19:05:02,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:02" (1/1) ... [2021-02-23 19:05:02,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:02" (1/1) ... [2021-02-23 19:05:02,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:02" (1/1) ... [2021-02-23 19:05:02,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:05:02,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:05:02,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:05:02,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:05:02,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:02" (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 19:05:03,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:05:03,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:05:03,059 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:05:03,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 19:05:03,059 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:05:03,059 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:05:03,060 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:05:03,060 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:05:03,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:05:03,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 19:05:03,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 19:05:03,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:05:03,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:05:03,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:05:03,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:05:03,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:05:03,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:05:03,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:05:03,468 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:05:03,468 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 19:05:03,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:05:03 BoogieIcfgContainer [2021-02-23 19:05:03,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:05:03,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:05:03,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:05:03,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:05:03,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:05:02" (1/3) ... [2021-02-23 19:05:03,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b9aa7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:05:03, skipping insertion in model container [2021-02-23 19:05:03,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:02" (2/3) ... [2021-02-23 19:05:03,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b9aa7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:05:03, skipping insertion in model container [2021-02-23 19:05:03,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:05:03" (3/3) ... [2021-02-23 19:05:03,487 INFO L111 eAbstractionObserver]: Analyzing ICFG mod4.c [2021-02-23 19:05:03,495 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:05:03,500 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:05:03,521 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:05:03,565 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:05:03,566 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:05:03,566 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:05:03,566 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:05:03,566 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:05:03,566 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:05:03,566 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:05:03,567 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:05:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2021-02-23 19:05:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 19:05:03,605 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:03,606 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] [2021-02-23 19:05:03,606 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:03,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1714919044, now seen corresponding path program 1 times [2021-02-23 19:05:03,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:03,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912749755] [2021-02-23 19:05:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:03,728 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:03,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:03,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:03,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:03,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:04,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:04,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:04,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:04,087 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 19:05:04,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912749755] [2021-02-23 19:05:04,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:04,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 19:05:04,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860882125] [2021-02-23 19:05:04,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 19:05:04,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:04,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 19:05:04,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 19:05:04,115 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2021-02-23 19:05:04,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:04,207 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-02-23 19:05:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 19:05:04,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-02-23 19:05:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:04,217 INFO L225 Difference]: With dead ends: 50 [2021-02-23 19:05:04,218 INFO L226 Difference]: Without dead ends: 30 [2021-02-23 19:05:04,221 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 [2021-02-23 19:05:04,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-23 19:05:04,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-02-23 19:05:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-23 19:05:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-02-23 19:05:04,270 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2021-02-23 19:05:04,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:04,271 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-02-23 19:05:04,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 19:05:04,272 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-02-23 19:05:04,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 19:05:04,273 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:04,273 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 19:05:04,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:05:04,273 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:04,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:04,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1521130299, now seen corresponding path program 1 times [2021-02-23 19:05:04,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:04,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759522152] [2021-02-23 19:05:04,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:04,280 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:04,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:04,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:04,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:04,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:04,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:04,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:05:04,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:04,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:05:04,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:04,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:04,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:04,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:04,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:04,429 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 19:05:04,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759522152] [2021-02-23 19:05:04,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:04,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 19:05:04,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25447016] [2021-02-23 19:05:04,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 19:05:04,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:04,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 19:05:04,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:05:04,437 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 6 states. [2021-02-23 19:05:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:04,735 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-02-23 19:05:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 19:05:04,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2021-02-23 19:05:04,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:04,737 INFO L225 Difference]: With dead ends: 40 [2021-02-23 19:05:04,737 INFO L226 Difference]: Without dead ends: 34 [2021-02-23 19:05:04,739 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 [2021-02-23 19:05:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-23 19:05:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-02-23 19:05:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-23 19:05:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-02-23 19:05:04,751 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 27 [2021-02-23 19:05:04,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:04,751 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-02-23 19:05:04,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 19:05:04,751 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-02-23 19:05:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 19:05:04,753 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:04,753 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2021-02-23 19:05:04,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:05:04,753 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:04,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1827953076, now seen corresponding path program 1 times [2021-02-23 19:05:04,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:04,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92411851] [2021-02-23 19:05:04,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:06,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:06,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-02-23 19:05:09,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-02-23 19:05:09,019 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 19:05:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:09,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:09,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:09,245 WARN L141 QuantifierPusher]: treesize reduction 17, result has 60.5 percent of original size [2021-02-23 19:05:09,247 WARN L147 QuantifierPusher]: treesize reduction 17, result has 60.5 percent of original size 26 [2021-02-23 19:05:09,286 WARN L141 QuantifierPusher]: treesize reduction 82, result has 48.8 percent of original size [2021-02-23 19:05:09,297 WARN L147 QuantifierPusher]: treesize reduction 82, result has 48.8 percent of original size 78 [2021-02-23 19:05:09,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:05:09,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:05:09,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:09,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:09,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:09,413 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 19:05:09,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 19:05:09,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:05:09,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-02-23 19:05:09,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 19:05:09,529 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.7 percent of original size [2021-02-23 19:05:09,538 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.7 percent of original size 132 [2021-02-23 19:05:09,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-02-23 19:05:09,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-23 19:05:09,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-02-23 19:05:09,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 19:05:09,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:05:09,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-02-23 19:05:09,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-23 19:05:09,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:09,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:09,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92411851] [2021-02-23 19:05:09,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:09,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 19:05:09,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79477940] [2021-02-23 19:05:09,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 19:05:09,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:09,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 19:05:09,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-23 19:05:09,862 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 10 states. [2021-02-23 19:05:10,351 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-02-23 19:05:10,546 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-02-23 19:05:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:10,631 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-02-23 19:05:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 19:05:10,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2021-02-23 19:05:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:10,632 INFO L225 Difference]: With dead ends: 34 [2021-02-23 19:05:10,632 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 19:05:10,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-02-23 19:05:10,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 19:05:10,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 19:05:10,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 19:05:10,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 19:05:10,635 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-02-23 19:05:10,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:10,635 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 19:05:10,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 19:05:10,635 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 19:05:10,636 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 19:05:10,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 19:05:10,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 19:05:11,191 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2021-02-23 19:05:11,448 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 19:05:11,449 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 19:05:11,449 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 19:05:11,449 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 19:05:11,449 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 19:05:11,450 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 19:05:11,450 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 19:05:11,450 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 19:05:11,450 INFO L192 CegarLoopUtils]: At program point L3-5(line 3) the Hoare annotation is: true [2021-02-23 19:05:11,450 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 19:05:11,450 INFO L192 CegarLoopUtils]: At program point L3-6(line 3) the Hoare annotation is: true [2021-02-23 19:05:11,450 INFO L192 CegarLoopUtils]: At program point L3-7(line 3) the Hoare annotation is: true [2021-02-23 19:05:11,451 INFO L192 CegarLoopUtils]: At program point L3-8(line 3) the Hoare annotation is: true [2021-02-23 19:05:11,451 INFO L192 CegarLoopUtils]: At program point L3-9(line 3) the Hoare annotation is: true [2021-02-23 19:05:11,451 INFO L192 CegarLoopUtils]: At program point L3-10(line 3) the Hoare annotation is: true [2021-02-23 19:05:11,451 INFO L192 CegarLoopUtils]: At program point L3-11(line 3) the Hoare annotation is: true [2021-02-23 19:05:11,451 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 19:05:11,451 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 19:05:11,452 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 19:05:11,452 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 19:05:11,452 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 19:05:11,452 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 19:05:11,452 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 19:05:11,452 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 19:05:11,452 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2021-02-23 19:05:11,453 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 11 18) the Hoare annotation is: true [2021-02-23 19:05:11,453 INFO L192 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-02-23 19:05:11,453 INFO L185 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: (or (= main_~x~0 4) (let ((.cse0 (div (+ main_~x~0 (- 12)) 4))) (and (<= (div (+ (* main_~x~0 (- 1)) 12) (- 4)) .cse0) (<= 0 .cse0))) (and (<= 8 main_~x~0) (<= main_~x~0 8)) (= main_~x~0 0)) [2021-02-23 19:05:11,453 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 11 18) the Hoare annotation is: true [2021-02-23 19:05:11,454 INFO L185 CegarLoopUtils]: At program point L13-1(lines 13 15) the Hoare annotation is: (let ((.cse0 (<= 0 (+ |main_#t~nondet7| 2147483648))) (.cse1 (<= |main_#t~nondet7| 2147483647))) (or (and (or (<= 8 main_~x~0) (= main_~x~0 4)) (<= (div (+ (* main_~x~0 (- 1)) 8) (- 4)) (div (+ main_~x~0 (- 8)) 4)) .cse0 .cse1) (and .cse0 (= main_~x~0 0) .cse1))) [2021-02-23 19:05:11,454 INFO L185 CegarLoopUtils]: At program point L13-2(line 13) the Hoare annotation is: (or (and (or (<= 8 main_~x~0) (= main_~x~0 4)) (<= (div (+ (* main_~x~0 (- 1)) 8) (- 4)) (div (+ main_~x~0 (- 8)) 4)) (<= 0 (+ |main_#t~nondet7| 2147483648)) (<= |main_#t~nondet7| 2147483647)) (= main_~x~0 0)) [2021-02-23 19:05:11,454 INFO L185 CegarLoopUtils]: At program point L13-4(line 13) the Hoare annotation is: (and (or (and (<= 4 main_~x~0) (<= main_~x~0 4)) (= main_~x~0 0) (let ((.cse0 (div (+ main_~x~0 (- 8)) 4))) (and (<= 0 .cse0) (<= (div (+ (* main_~x~0 (- 1)) 8) (- 4)) .cse0)))) (<= 0 (+ |main_#t~nondet7| 2147483648)) (not (= |main_#t~nondet7| 0)) (<= |main_#t~nondet7| 2147483647)) [2021-02-23 19:05:11,454 INFO L185 CegarLoopUtils]: At program point L13-5(lines 13 15) the Hoare annotation is: (or (= main_~x~0 4) (let ((.cse0 (div (+ main_~x~0 (- 12)) 4))) (and (<= (div (+ (* main_~x~0 (- 1)) 12) (- 4)) .cse0) (<= 0 .cse0))) (and (<= 8 main_~x~0) (<= main_~x~0 8)) (= main_~x~0 0)) [2021-02-23 19:05:11,455 INFO L185 CegarLoopUtils]: At program point L13-6(lines 13 15) the Hoare annotation is: (or (= main_~x~0 4) (let ((.cse0 (div (+ main_~x~0 (- 12)) 4))) (and (<= (div (+ (* main_~x~0 (- 1)) 12) (- 4)) .cse0) (<= 0 .cse0))) (and (<= 8 main_~x~0) (<= main_~x~0 8)) (= main_~x~0 0)) [2021-02-23 19:05:11,455 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-23 19:05:11,455 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-02-23 19:05:11,455 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 19:05:11,455 INFO L185 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-23 19:05:11,455 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 19:05:11,456 INFO L192 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-02-23 19:05:11,456 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 19:05:11,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:05:11 BoogieIcfgContainer [2021-02-23 19:05:11,474 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 19:05:11,476 INFO L168 Benchmark]: Toolchain (without parser) took 8939.73 ms. Allocated memory was 160.4 MB in the beginning and 211.8 MB in the end (delta: 51.4 MB). Free memory was 136.7 MB in the beginning and 102.2 MB in the end (delta: 34.5 MB). Peak memory consumption was 115.6 MB. Max. memory is 8.0 GB. [2021-02-23 19:05:11,476 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 160.4 MB. Free memory is still 135.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 19:05:11,477 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.13 ms. Allocated memory is still 160.4 MB. Free memory was 135.6 MB in the beginning and 125.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 19:05:11,478 INFO L168 Benchmark]: Boogie Preprocessor took 43.10 ms. Allocated memory is still 160.4 MB. Free memory was 125.7 MB in the beginning and 124.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 19:05:11,479 INFO L168 Benchmark]: RCFGBuilder took 540.62 ms. Allocated memory is still 160.4 MB. Free memory was 124.5 MB in the beginning and 109.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-23 19:05:11,479 INFO L168 Benchmark]: TraceAbstraction took 7996.29 ms. Allocated memory was 160.4 MB in the beginning and 211.8 MB in the end (delta: 51.4 MB). Free memory was 108.9 MB in the beginning and 102.2 MB in the end (delta: 6.7 MB). Peak memory consumption was 88.4 MB. Max. memory is 8.0 GB. [2021-02-23 19:05:11,483 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 160.4 MB. Free memory is still 135.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 339.13 ms. Allocated memory is still 160.4 MB. Free memory was 135.6 MB in the beginning and 125.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.10 ms. Allocated memory is still 160.4 MB. Free memory was 125.7 MB in the beginning and 124.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 540.62 ms. Allocated memory is still 160.4 MB. Free memory was 124.5 MB in the beginning and 109.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7996.29 ms. Allocated memory was 160.4 MB in the beginning and 211.8 MB in the end (delta: 51.4 MB). Free memory was 108.9 MB in the beginning and 102.2 MB in the end (delta: 6.7 MB). Peak memory consumption was 88.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((x == 4 || ((x * -1 + 12) / -4 <= (x + -12) / 4 && 0 <= (x + -12) / 4)) || (8 <= x && x <= 8)) || x == 0 - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.0s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 90 SDtfs, 53 SDslu, 148 SDs, 0 SdLazy, 119 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 52 PreInvPairs, 68 NumberOfFragments, 300 HoareAnnotationTreeSize, 52 FomulaSimplifications, 337 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 38 FomulaSimplificationsInter, 703 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...