/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:21:15,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:21:15,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:21:15,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:21:15,250 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:21:15,285 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:21:15,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:21:15,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:21:15,294 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:21:15,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:21:15,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:21:15,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:21:15,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:21:15,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:21:15,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:21:15,297 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:21:15,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:21:15,298 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:21:15,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:21:15,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:21:15,299 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:21:15,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:21:15,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:21:15,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:21:15,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:21:15,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:21:15,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:21:15,300 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:21:15,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:21:15,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:21:15,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:21:15,969 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:21:15,970 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:21:15,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2021-02-24 00:21:16,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb3d72832/23a2cb28eeb94267a0d02dfa4894ac7a/FLAGd90fd89d9 [2021-02-24 00:21:16,998 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:21:16,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2021-02-24 00:21:17,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb3d72832/23a2cb28eeb94267a0d02dfa4894ac7a/FLAGd90fd89d9 [2021-02-24 00:21:17,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb3d72832/23a2cb28eeb94267a0d02dfa4894ac7a [2021-02-24 00:21:17,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:21:17,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:21:17,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:21:17,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:21:17,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:21:17,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:21:17" (1/1) ... [2021-02-24 00:21:17,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ffb6540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:17, skipping insertion in model container [2021-02-24 00:21:17,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:21:17" (1/1) ... [2021-02-24 00:21:17,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:21:17,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:21:17,723 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c[986,999] [2021-02-24 00:21:17,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:21:17,756 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:21:17,799 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c[986,999] [2021-02-24 00:21:17,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:21:17,840 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:21:17,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:17 WrapperNode [2021-02-24 00:21:17,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:21:17,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:21:17,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:21:17,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:21:17,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:17" (1/1) ... [2021-02-24 00:21:17,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:17" (1/1) ... [2021-02-24 00:21:17,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:17" (1/1) ... [2021-02-24 00:21:17,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:17" (1/1) ... [2021-02-24 00:21:17,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:17" (1/1) ... [2021-02-24 00:21:17,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:17" (1/1) ... [2021-02-24 00:21:17,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:17" (1/1) ... [2021-02-24 00:21:17,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:21:17,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:21:17,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:21:17,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:21:17,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:17" (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 [2021-02-24 00:21:18,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:21:18,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:21:18,201 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:21:18,201 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:21:18,202 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:21:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:21:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:21:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:21:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:21:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:21:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:21:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:21:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:21:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:21:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:21:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:21:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:21:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:21:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:21:18,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:21:18,729 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 00:21:18,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:21:18 BoogieIcfgContainer [2021-02-24 00:21:18,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:21:18,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:21:18,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:21:18,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:21:18,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:21:17" (1/3) ... [2021-02-24 00:21:18,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc8ab0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:21:18, skipping insertion in model container [2021-02-24 00:21:18,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:17" (2/3) ... [2021-02-24 00:21:18,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc8ab0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:21:18, skipping insertion in model container [2021-02-24 00:21:18,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:21:18" (3/3) ... [2021-02-24 00:21:18,758 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2021-02-24 00:21:18,767 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:21:18,774 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:21:18,806 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:21:18,862 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:21:18,862 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:21:18,862 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:21:18,863 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:21:18,863 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:21:18,863 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:21:18,863 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:21:18,863 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:21:18,899 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-24 00:21:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-24 00:21:18,927 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:18,929 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] [2021-02-24 00:21:18,930 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:18,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:18,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1684338299, now seen corresponding path program 1 times [2021-02-24 00:21:18,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:18,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128374877] [2021-02-24 00:21:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:19,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:19,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:19,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:19,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:21:19,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:19,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:19,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:19,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:19,463 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:19,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128374877] [2021-02-24 00:21:19,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:21:19,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 00:21:19,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467994423] [2021-02-24 00:21:19,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 00:21:19,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:19,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 00:21:19,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 00:21:19,512 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2021-02-24 00:21:19,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:19,791 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-02-24 00:21:19,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 00:21:19,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-24 00:21:19,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:19,807 INFO L225 Difference]: With dead ends: 59 [2021-02-24 00:21:19,807 INFO L226 Difference]: Without dead ends: 35 [2021-02-24 00:21:19,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:21:19,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-24 00:21:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-02-24 00:21:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-24 00:21:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-02-24 00:21:19,932 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 29 [2021-02-24 00:21:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:19,933 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-02-24 00:21:19,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 00:21:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-02-24 00:21:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-24 00:21:19,935 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:19,935 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, 1] [2021-02-24 00:21:19,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:21:19,936 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:19,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1669681219, now seen corresponding path program 1 times [2021-02-24 00:21:19,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:19,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461738144] [2021-02-24 00:21:19,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:20,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:20,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:20,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:20,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:21:20,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:20,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:21:20,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:20,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:21:20,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:20,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:20,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:20,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:20,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:20,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:20,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:20,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:20,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:20,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:20,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:20,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461738144] [2021-02-24 00:21:20,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:20,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-24 00:21:20,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12044552] [2021-02-24 00:21:20,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:21:20,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:20,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:21:20,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:21:20,299 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 9 states. [2021-02-24 00:21:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:21,118 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-02-24 00:21:21,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 00:21:21,120 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2021-02-24 00:21:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:21,122 INFO L225 Difference]: With dead ends: 46 [2021-02-24 00:21:21,123 INFO L226 Difference]: Without dead ends: 39 [2021-02-24 00:21:21,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-02-24 00:21:21,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-24 00:21:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-02-24 00:21:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-24 00:21:21,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-02-24 00:21:21,146 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 33 [2021-02-24 00:21:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:21,147 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-02-24 00:21:21,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:21:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-02-24 00:21:21,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-24 00:21:21,149 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:21,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-02-24 00:21:21,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:21:21,151 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:21,152 INFO L82 PathProgramCache]: Analyzing trace with hash 189925377, now seen corresponding path program 2 times [2021-02-24 00:21:21,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:21,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356168030] [2021-02-24 00:21:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:21,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:21,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:21,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:21,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:21:21,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:21,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:21:21,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:21,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:21:21,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:21,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:21,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:21,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:21,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:21,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:21,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:21,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:21,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:21,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:21,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:21,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:21,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:21,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:21,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:21,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356168030] [2021-02-24 00:21:21,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:21,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-24 00:21:21,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226929276] [2021-02-24 00:21:21,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-24 00:21:21,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:21,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-24 00:21:21,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-24 00:21:21,544 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 11 states. [2021-02-24 00:21:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:22,248 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-02-24 00:21:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 00:21:22,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2021-02-24 00:21:22,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:22,251 INFO L225 Difference]: With dead ends: 50 [2021-02-24 00:21:22,251 INFO L226 Difference]: Without dead ends: 43 [2021-02-24 00:21:22,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-02-24 00:21:22,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-24 00:21:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-02-24 00:21:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-24 00:21:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-02-24 00:21:22,269 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 37 [2021-02-24 00:21:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:22,270 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-02-24 00:21:22,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-24 00:21:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-02-24 00:21:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-24 00:21:22,272 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:22,272 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-02-24 00:21:22,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:21:22,273 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:22,274 INFO L82 PathProgramCache]: Analyzing trace with hash 174108863, now seen corresponding path program 3 times [2021-02-24 00:21:22,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:22,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584966259] [2021-02-24 00:21:22,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:22,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:22,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:22,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:22,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:21:22,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:22,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:21:22,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:22,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:21:22,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:22,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:22,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:22,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:22,369 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:22,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:22,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:22,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:22,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:22,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:22,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-24 00:21:22,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584966259] [2021-02-24 00:21:22,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:21:22,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 00:21:22,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786566140] [2021-02-24 00:21:22,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:21:22,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:22,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:21:22,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:21:22,445 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 9 states. [2021-02-24 00:21:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:22,905 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-02-24 00:21:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 00:21:22,906 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2021-02-24 00:21:22,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:22,907 INFO L225 Difference]: With dead ends: 42 [2021-02-24 00:21:22,907 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 00:21:22,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-02-24 00:21:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 00:21:22,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 00:21:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 00:21:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 00:21:22,910 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-02-24 00:21:22,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:22,910 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 00:21:22,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:21:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 00:21:22,911 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 00:21:22,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:21:22,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 00:21:23,421 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 22 [2021-02-24 00:21:24,088 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-02-24 00:21:24,088 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-02-24 00:21:24,089 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-02-24 00:21:24,089 INFO L192 CegarLoopUtils]: At program point L4-3(line 4) the Hoare annotation is: true [2021-02-24 00:21:24,089 INFO L192 CegarLoopUtils]: At program point L4-4(line 4) the Hoare annotation is: true [2021-02-24 00:21:24,089 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:21:24,090 INFO L192 CegarLoopUtils]: At program point L4-5(line 4) the Hoare annotation is: true [2021-02-24 00:21:24,090 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 00:21:24,090 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:21:24,090 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-24 00:21:24,090 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)|) (= ~__return_main~0 |old(~__return_main~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= ~__return_65~0 |old(~__return_65~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-24 00:21:24,091 INFO L192 CegarLoopUtils]: At program point L4(line 4) the Hoare annotation is: true [2021-02-24 00:21:24,091 INFO L192 CegarLoopUtils]: At program point L4-1(line 4) the Hoare annotation is: true [2021-02-24 00:21:24,091 INFO L192 CegarLoopUtils]: At program point L4-2(line 4) the Hoare annotation is: true [2021-02-24 00:21:24,091 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:21:24,091 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:21:24,092 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:21:24,092 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 00:21:24,092 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:21:24,092 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2021-02-24 00:21:24,092 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-02-24 00:21:24,092 INFO L189 CegarLoopUtils]: For program point L7-1(line 7) no Hoare annotation was computed. [2021-02-24 00:21:24,093 INFO L189 CegarLoopUtils]: For program point L7-3(lines 6 8) no Hoare annotation was computed. [2021-02-24 00:21:24,093 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-02-24 00:21:24,093 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-24 00:21:24,093 INFO L185 CegarLoopUtils]: At program point L25(lines 25 58) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-24 00:21:24,094 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 13 60) the Hoare annotation is: true [2021-02-24 00:21:24,094 INFO L192 CegarLoopUtils]: At program point L54(line 54) the Hoare annotation is: true [2021-02-24 00:21:24,094 INFO L185 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-24 00:21:24,094 INFO L185 CegarLoopUtils]: At program point L19(lines 19 59) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-24 00:21:24,094 INFO L185 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2021-02-24 00:21:24,095 INFO L185 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: false [2021-02-24 00:21:24,095 INFO L185 CegarLoopUtils]: At program point L46(lines 46 55) the Hoare annotation is: (let ((.cse0 (not (= main_~__tmp_1~0 0))) (.cse1 (not (= main_~__VERIFIER_assert__cond~0 0))) (.cse2 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 .cse1 (<= 27 main_~main__y~0) (<= (+ main_~main__x~0 53) (* 2 main_~main__y~0)) .cse2) (and (<= 2 main_~main__y~0) .cse0 .cse1 .cse2 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2021-02-24 00:21:24,095 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 13 60) the Hoare annotation is: true [2021-02-24 00:21:24,095 INFO L185 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 (not (= main_~__tmp_1~0 0))) (.cse1 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= 27 main_~main__y~0) (<= (+ main_~main__x~0 53) (* 2 main_~main__y~0)) .cse1) (and (<= 2 main_~main__y~0) .cse0 .cse1 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2021-02-24 00:21:24,096 INFO L185 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and (<= 2 main_~main__y~0) .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)) (and (<= 27 main_~main__y~0) (<= (+ main_~main__x~0 53) (* 2 main_~main__y~0)) .cse0))) [2021-02-24 00:21:24,096 INFO L185 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 1) main_~main__y~0)) [2021-02-24 00:21:24,096 INFO L185 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= (+ main_~main__x~0 50) 0)) (and (<= (+ main_~main__x~0 1) 0) .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2021-02-24 00:21:24,097 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 48) the Hoare annotation is: false [2021-02-24 00:21:24,097 INFO L185 CegarLoopUtils]: At program point mainENTRY(lines 13 60) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2021-02-24 00:21:24,097 INFO L185 CegarLoopUtils]: At program point L53(line 53) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2021-02-24 00:21:24,097 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-24 00:21:24,098 INFO L185 CegarLoopUtils]: At program point L18-1(line 18) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-24 00:21:24,098 INFO L185 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: false [2021-02-24 00:21:24,098 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2021-02-24 00:21:24,098 INFO L185 CegarLoopUtils]: At program point L18-2(line 18) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-24 00:21:24,099 INFO L185 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (not (= main_~__tmp_1~0 0))) (.cse1 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= 27 main_~main__y~0) (<= (+ main_~main__x~0 53) (* 2 main_~main__y~0)) .cse1) (and (<= 2 main_~main__y~0) .cse0 .cse1 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2021-02-24 00:21:24,099 INFO L185 CegarLoopUtils]: At program point L43(line 43) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and (<= 2 main_~main__y~0) .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)) (and (<= 27 main_~main__y~0) (<= (+ main_~main__x~0 53) (* 2 main_~main__y~0)) .cse0))) [2021-02-24 00:21:24,099 INFO L185 CegarLoopUtils]: At program point L37(lines 30 58) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= (+ main_~main__x~0 50) 0)) (and .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2021-02-24 00:21:24,099 INFO L185 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 1) main_~main__y~0)) [2021-02-24 00:21:24,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:21:24 BoogieIcfgContainer [2021-02-24 00:21:24,132 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:21:24,135 INFO L168 Benchmark]: Toolchain (without parser) took 6831.13 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 107.9 MB in the beginning and 87.6 MB in the end (delta: 20.3 MB). Peak memory consumption was 80.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:24,136 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:21:24,137 INFO L168 Benchmark]: CACSL2BoogieTranslator took 518.41 ms. Allocated memory is still 151.0 MB. Free memory was 106.9 MB in the beginning and 97.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:24,138 INFO L168 Benchmark]: Boogie Preprocessor took 90.13 ms. Allocated memory is still 151.0 MB. Free memory was 97.2 MB in the beginning and 95.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:24,139 INFO L168 Benchmark]: RCFGBuilder took 801.37 ms. Allocated memory is still 151.0 MB. Free memory was 95.8 MB in the beginning and 121.2 MB in the end (delta: -25.4 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:24,140 INFO L168 Benchmark]: TraceAbstraction took 5389.36 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 120.9 MB in the beginning and 87.6 MB in the end (delta: 33.3 MB). Peak memory consumption was 93.6 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:24,144 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 518.41 ms. Allocated memory is still 151.0 MB. Free memory was 106.9 MB in the beginning and 97.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 90.13 ms. Allocated memory is still 151.0 MB. Free memory was 97.2 MB in the beginning and 95.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 801.37 ms. Allocated memory is still 151.0 MB. Free memory was 95.8 MB in the beginning and 121.2 MB in the end (delta: -25.4 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5389.36 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 120.9 MB in the beginning and 87.6 MB in the end (delta: 33.3 MB). Peak memory consumption was 93.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: 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: 30]: Loop Invariant Derived loop invariant: (\old(__return_65) == __return_65 && main__x + 50 <= 0) || (\old(__return_65) == __return_65 && main__x + 2 <= main__y) - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 115 SDtfs, 158 SDslu, 255 SDs, 0 SdLazy, 398 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 42 LocationsWithAnnotation, 42 PreInvPairs, 74 NumberOfFragments, 361 HoareAnnotationTreeSize, 42 FomulaSimplifications, 1224 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 42 FomulaSimplificationsInter, 1171 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 140 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 136 ConstructedInterpolants, 0 QuantifiedInterpolants, 15828 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 15/22 InterpolantCoveringCapability, 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...