/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-acceleration/multivar_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:17:21,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:17:21,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:17:21,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:17:21,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:17:21,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:17:21,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:17:21,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:17:21,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:17:21,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:17:21,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:17:21,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:17:21,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:17:21,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:17:21,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:17:21,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:17:21,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:17:21,470 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 00:17:21,494 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:17:21,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:17:21,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:17:21,499 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:17:21,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:17:21,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:17:21,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:17:21,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:17:21,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:17:21,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:17:21,501 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:17:21,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:17:21,501 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:17:21,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:17:21,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:17:21,502 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:17:21,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:17:21,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:17:21,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:17:21,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:17:21,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:17:21,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:17:21,504 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:17:21,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:17:21,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:17:21,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:17:21,940 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:17:21,941 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:17:21,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/multivar_1-1.c [2021-02-24 00:17:22,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea49341e4/67612d9a60054830ac16a39ff534bd75/FLAGd3a1e04c1 [2021-02-24 00:17:22,600 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:17:22,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/multivar_1-1.c [2021-02-24 00:17:22,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea49341e4/67612d9a60054830ac16a39ff534bd75/FLAGd3a1e04c1 [2021-02-24 00:17:22,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea49341e4/67612d9a60054830ac16a39ff534bd75 [2021-02-24 00:17:22,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:17:22,984 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:17:22,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:22,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:17:22,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:17:22,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:22" (1/1) ... [2021-02-24 00:17:22,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e26b602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:22, skipping insertion in model container [2021-02-24 00:17:22,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:22" (1/1) ... [2021-02-24 00:17:23,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:17:23,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:17:23,177 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-acceleration/multivar_1-1.c[374,387] [2021-02-24 00:17:23,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:23,201 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:17:23,216 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-acceleration/multivar_1-1.c[374,387] [2021-02-24 00:17:23,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:23,236 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:17:23,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:23 WrapperNode [2021-02-24 00:17:23,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:23,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:17:23,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:17:23,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:17:23,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:23" (1/1) ... [2021-02-24 00:17:23,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:23" (1/1) ... [2021-02-24 00:17:23,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:23" (1/1) ... [2021-02-24 00:17:23,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:23" (1/1) ... [2021-02-24 00:17:23,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:23" (1/1) ... [2021-02-24 00:17:23,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:23" (1/1) ... [2021-02-24 00:17:23,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:23" (1/1) ... [2021-02-24 00:17:23,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:17:23,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:17:23,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:17:23,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:17:23,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:23" (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 00:17:23,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:17:23,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:17:23,392 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:17:23,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:17:23,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:17:23,393 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:17:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:17:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:17:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:17:23,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-24 00:17:23,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:17:23,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:17:23,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:17:23,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:17:23,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:17:23,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:17:23,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:17:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:17:23,850 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:17:23,850 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:17:23,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:23 BoogieIcfgContainer [2021-02-24 00:17:23,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:17:23,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:17:23,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:17:23,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:17:23,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:17:22" (1/3) ... [2021-02-24 00:17:23,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120d4261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:23, skipping insertion in model container [2021-02-24 00:17:23,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:23" (2/3) ... [2021-02-24 00:17:23,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120d4261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:23, skipping insertion in model container [2021-02-24 00:17:23,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:23" (3/3) ... [2021-02-24 00:17:23,876 INFO L111 eAbstractionObserver]: Analyzing ICFG multivar_1-1.c [2021-02-24 00:17:23,883 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:17:23,887 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:17:23,902 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:17:23,923 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:17:23,924 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:17:23,924 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:17:23,924 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:17:23,924 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:17:23,924 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:17:23,924 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:17:23,924 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:17:23,939 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2021-02-24 00:17:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-24 00:17:23,948 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:23,949 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] [2021-02-24 00:17:23,950 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash -483578508, now seen corresponding path program 1 times [2021-02-24 00:17:23,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:23,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448008757] [2021-02-24 00:17:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:24,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:24,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:24,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:24,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:24,314 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 00:17:24,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448008757] [2021-02-24 00:17:24,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:24,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:17:24,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643268032] [2021-02-24 00:17:24,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:17:24,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:24,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:17:24,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:17:24,344 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2021-02-24 00:17:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:24,419 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-02-24 00:17:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:17:24,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-02-24 00:17:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:24,431 INFO L225 Difference]: With dead ends: 45 [2021-02-24 00:17:24,431 INFO L226 Difference]: Without dead ends: 27 [2021-02-24 00:17:24,434 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 [2021-02-24 00:17:24,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-24 00:17:24,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-02-24 00:17:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-24 00:17:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-02-24 00:17:24,484 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2021-02-24 00:17:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:24,485 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-02-24 00:17:24,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:17:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-02-24 00:17:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-24 00:17:24,486 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:24,486 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] [2021-02-24 00:17:24,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:17:24,487 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash -492813718, now seen corresponding path program 1 times [2021-02-24 00:17:24,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:24,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517976902] [2021-02-24 00:17:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:24,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:24,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:24,672 WARN L141 QuantifierPusher]: treesize reduction 6, result has 92.1 percent of original size [2021-02-24 00:17:24,675 WARN L147 QuantifierPusher]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-02-24 00:17:24,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:24,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:24,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:24,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:24,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:24,740 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 00:17:24,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517976902] [2021-02-24 00:17:24,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:24,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 00:17:24,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026374363] [2021-02-24 00:17:24,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:17:24,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:24,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:17:24,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:17:24,745 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 6 states. [2021-02-24 00:17:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:25,006 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-02-24 00:17:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:17:25,007 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2021-02-24 00:17:25,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:25,009 INFO L225 Difference]: With dead ends: 35 [2021-02-24 00:17:25,009 INFO L226 Difference]: Without dead ends: 30 [2021-02-24 00:17:25,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:17:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-24 00:17:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-02-24 00:17:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-02-24 00:17:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-02-24 00:17:25,021 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 20 [2021-02-24 00:17:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:25,021 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-02-24 00:17:25,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:17:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-02-24 00:17:25,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-24 00:17:25,023 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:25,023 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] [2021-02-24 00:17:25,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:17:25,023 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:25,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:25,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2112061736, now seen corresponding path program 1 times [2021-02-24 00:17:25,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:25,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190637897] [2021-02-24 00:17:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:25,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:25,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:25,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-24 00:17:25,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:17:25,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-24 00:17:25,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-24 00:17:25,284 WARN L141 QuantifierPusher]: treesize reduction 17, result has 80.5 percent of original size [2021-02-24 00:17:25,288 WARN L147 QuantifierPusher]: treesize reduction 17, result has 80.5 percent of original size 70 [2021-02-24 00:17:25,361 WARN L141 QuantifierPusher]: treesize reduction 32, result has 61.9 percent of original size [2021-02-24 00:17:25,363 WARN L147 QuantifierPusher]: treesize reduction 32, result has 61.9 percent of original size 52 [2021-02-24 00:17:25,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:25,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:25,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:25,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:25,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:25,500 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 00:17:25,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190637897] [2021-02-24 00:17:25,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:25,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-24 00:17:25,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406582245] [2021-02-24 00:17:25,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 00:17:25,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:25,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 00:17:25,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:17:25,504 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 12 states. [2021-02-24 00:17:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:26,519 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-02-24 00:17:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-24 00:17:26,520 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2021-02-24 00:17:26,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:26,521 INFO L225 Difference]: With dead ends: 42 [2021-02-24 00:17:26,521 INFO L226 Difference]: Without dead ends: 37 [2021-02-24 00:17:26,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-02-24 00:17:26,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-24 00:17:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-02-24 00:17:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-24 00:17:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-02-24 00:17:26,536 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 27 [2021-02-24 00:17:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:26,537 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-02-24 00:17:26,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 00:17:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-02-24 00:17:26,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-24 00:17:26,538 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:26,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:26,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:17:26,539 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:26,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:26,540 INFO L82 PathProgramCache]: Analyzing trace with hash -482488150, now seen corresponding path program 2 times [2021-02-24 00:17:26,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:26,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635023559] [2021-02-24 00:17:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:26,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:26,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:26,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:26,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:17:26,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:17:26,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:26,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:26,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:17:26,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:17:26,736 WARN L141 QuantifierPusher]: treesize reduction 19, result has 81.6 percent of original size [2021-02-24 00:17:26,739 WARN L147 QuantifierPusher]: treesize reduction 19, result has 81.6 percent of original size 84 [2021-02-24 00:17:26,764 WARN L141 QuantifierPusher]: treesize reduction 19, result has 83.5 percent of original size [2021-02-24 00:17:26,766 WARN L147 QuantifierPusher]: treesize reduction 19, result has 83.5 percent of original size 96 [2021-02-24 00:17:26,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:26,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:26,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:26,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:26,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-24 00:17:26,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635023559] [2021-02-24 00:17:26,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:26,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 00:17:26,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039053495] [2021-02-24 00:17:26,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:17:26,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:26,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:17:26,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:17:26,845 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 9 states. [2021-02-24 00:17:27,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:27,190 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-02-24 00:17:27,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 00:17:27,190 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2021-02-24 00:17:27,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:27,191 INFO L225 Difference]: With dead ends: 35 [2021-02-24 00:17:27,191 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 00:17:27,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-24 00:17:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 00:17:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 00:17:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 00:17:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 00:17:27,193 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2021-02-24 00:17:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:27,193 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 00:17:27,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:17:27,194 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 00:17:27,194 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 00:17:27,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:17:27,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 00:17:27,588 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-24 00:17:27,589 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-24 00:17:27,589 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-24 00:17:27,589 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-24 00:17:27,589 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-24 00:17:27,590 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:17:27,590 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-24 00:17:27,590 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 00:17:27,591 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-24 00:17:27,591 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|)) [2021-02-24 00:17:27,591 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-24 00:17:27,591 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-24 00:17:27,591 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:17:27,592 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:17:27,592 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:17:27,592 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 00:17:27,592 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:17:27,592 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2021-02-24 00:17:27,593 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 13 23) the Hoare annotation is: true [2021-02-24 00:17:27,593 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (<= .cse0 main_~x~0) (<= main_~x~0 .cse0))) [2021-02-24 00:17:27,593 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (= main_~y~0 main_~x~0) [2021-02-24 00:17:27,593 INFO L185 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1)) (.cse1 (+ |main_#t~post9| 1))) (and (<= .cse0 main_~x~0) (<= main_~x~0 .cse0) (<= main_~x~0 .cse1) (<= .cse1 main_~x~0))) [2021-02-24 00:17:27,593 INFO L185 CegarLoopUtils]: At program point L18-1(line 18) the Hoare annotation is: (and (<= main_~y~0 |main_#t~post8|) (= main_~y~0 main_~x~0) (<= |main_#t~post8| main_~y~0)) [2021-02-24 00:17:27,595 INFO L185 CegarLoopUtils]: At program point L19-2(line 19) the Hoare annotation is: (let ((.cse0 (+ |main_#t~post9| 1))) (and (= main_~y~0 main_~x~0) (<= main_~x~0 .cse0) (<= .cse0 main_~x~0))) [2021-02-24 00:17:27,595 INFO L185 CegarLoopUtils]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (<= main_~y~0 |main_#t~post8|) (<= .cse0 main_~x~0) (<= main_~x~0 .cse0) (<= |main_#t~post8| main_~y~0))) [2021-02-24 00:17:27,595 INFO L192 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: true [2021-02-24 00:17:27,596 INFO L185 CegarLoopUtils]: At program point L17-2(lines 17 20) the Hoare annotation is: (= main_~y~0 main_~x~0) [2021-02-24 00:17:27,596 INFO L192 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: true [2021-02-24 00:17:27,596 INFO L185 CegarLoopUtils]: At program point L17-3(lines 17 20) the Hoare annotation is: (let ((.cse1 (* 4294967296 (div main_~y~0 4294967296))) (.cse0 (+ main_~y~0 (* 4294967296 (div main_~x~0 4294967296))))) (and (< .cse0 (+ main_~x~0 .cse1 1)) (<= (+ main_~x~0 .cse1) .cse0))) [2021-02-24 00:17:27,596 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 13 23) the Hoare annotation is: true [2021-02-24 00:17:27,596 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2021-02-24 00:17:27,597 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2021-02-24 00:17:27,597 INFO L185 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:17:27,597 INFO L185 CegarLoopUtils]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-24 00:17:27,597 INFO L185 CegarLoopUtils]: At program point L8-1(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:17:27,597 INFO L192 CegarLoopUtils]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2021-02-24 00:17:27,598 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:17:27,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:17:27 BoogieIcfgContainer [2021-02-24 00:17:27,618 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:17:27,620 INFO L168 Benchmark]: Toolchain (without parser) took 4648.62 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.7 MB in the beginning and 121.9 MB in the end (delta: 5.8 MB). Peak memory consumption was 98.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:27,621 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:17:27,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.75 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:27,630 INFO L168 Benchmark]: Boogie Preprocessor took 37.39 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:27,634 INFO L168 Benchmark]: RCFGBuilder took 576.75 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 102.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:27,635 INFO L168 Benchmark]: TraceAbstraction took 3758.36 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 102.0 MB in the beginning and 121.9 MB in the end (delta: -19.9 MB). Peak memory consumption was 72.9 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:27,640 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 247.75 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.39 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 576.75 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 102.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3758.36 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 102.0 MB in the beginning and 121.9 MB in the end (delta: -19.9 MB). Peak memory consumption was 72.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 17]: Loop Invariant Derived loop invariant: y == x - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 93 SDtfs, 84 SDslu, 218 SDs, 0 SdLazy, 249 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, 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, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 34 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 180 HoareAnnotationTreeSize, 55 FomulaSimplifications, 1207 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 34 FomulaSimplificationsInter, 602 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 101 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 14773 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 9/10 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...