/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/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:40:21,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:40:21,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:40:21,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 06:40:21,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:40:21,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:40:21,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:40:21,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:40:21,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:40:21,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:40:21,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:40:21,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:40:21,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:40:21,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:40:21,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:40:21,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:40:21,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:40:21,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:40:21,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:40:21,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:40:21,332 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:40:21,344 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:40:21,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:40:21,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:40:21,364 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:40:21,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:40:21,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:40:21,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:40:21,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:40:21,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:40:21,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:40:21,366 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:40:21,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:40:21,367 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:40:21,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:40:21,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:40:21,368 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:40:21,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:40:21,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:40:21,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:40:21,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:40:21,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:40:21,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:40:21,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:40:21,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:40:21,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:40:21,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:40:21,772 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:40:21,772 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:40:21,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-11-07 06:40:21,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a983d8e59/e9ba0491989c487f951ecb3feefe8cf4/FLAGb87326e50 [2020-11-07 06:40:22,550 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:40:22,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-11-07 06:40:22,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a983d8e59/e9ba0491989c487f951ecb3feefe8cf4/FLAGb87326e50 [2020-11-07 06:40:22,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a983d8e59/e9ba0491989c487f951ecb3feefe8cf4 [2020-11-07 06:40:22,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:40:22,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:40:22,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:40:22,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:40:22,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:40:22,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:40:22" (1/1) ... [2020-11-07 06:40:22,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28cc575a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:22, skipping insertion in model container [2020-11-07 06:40:22,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:40:22" (1/1) ... [2020-11-07 06:40:22,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:40:22,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:40:23,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:40:23,259 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:40:23,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:40:23,302 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:40:23,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:23 WrapperNode [2020-11-07 06:40:23,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:40:23,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:40:23,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:40:23,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:40:23,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:23" (1/1) ... [2020-11-07 06:40:23,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:23" (1/1) ... [2020-11-07 06:40:23,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:23" (1/1) ... [2020-11-07 06:40:23,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:23" (1/1) ... [2020-11-07 06:40:23,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:23" (1/1) ... [2020-11-07 06:40:23,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:23" (1/1) ... [2020-11-07 06:40:23,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:23" (1/1) ... [2020-11-07 06:40:23,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:40:23,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:40:23,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:40:23,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:40:23,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:23" (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 [2020-11-07 06:40:23,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:40:23,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:40:23,409 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:40:23,410 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:40:23,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:40:23,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:40:23,410 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:40:23,410 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:40:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 06:40:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 06:40:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:40:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:40:23,412 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:40:23,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:40:23,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:40:23,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:40:23,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:40:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:40:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:40:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:40:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:40:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:40:23,887 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:40:23,887 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:40:23,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:40:23 BoogieIcfgContainer [2020-11-07 06:40:23,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:40:23,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:40:23,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:40:23,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:40:23,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:40:22" (1/3) ... [2020-11-07 06:40:23,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c9366b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:40:23, skipping insertion in model container [2020-11-07 06:40:23,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:23" (2/3) ... [2020-11-07 06:40:23,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c9366b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:40:23, skipping insertion in model container [2020-11-07 06:40:23,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:40:23" (3/3) ... [2020-11-07 06:40:23,905 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-11-07 06:40:23,936 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:40:23,939 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:40:23,953 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:40:23,988 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:40:23,989 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:40:23,989 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:40:23,989 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:40:23,989 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:40:23,989 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:40:23,989 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:40:23,990 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:40:24,011 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-11-07 06:40:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-07 06:40:24,024 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:24,025 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] [2020-11-07 06:40:24,025 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:24,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:24,034 INFO L82 PathProgramCache]: Analyzing trace with hash -24480081, now seen corresponding path program 1 times [2020-11-07 06:40:24,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:24,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273902960] [2020-11-07 06:40:24,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:24,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:24,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273902960] [2020-11-07 06:40:24,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:40:24,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:40:24,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303300228] [2020-11-07 06:40:24,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:40:24,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:24,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:40:24,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:40:24,409 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-11-07 06:40:24,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:24,503 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-11-07 06:40:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:40:24,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-07 06:40:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:24,514 INFO L225 Difference]: With dead ends: 57 [2020-11-07 06:40:24,514 INFO L226 Difference]: Without dead ends: 33 [2020-11-07 06:40:24,517 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 [2020-11-07 06:40:24,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-07 06:40:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-07 06:40:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-07 06:40:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-07 06:40:24,568 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 23 [2020-11-07 06:40:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:24,569 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-07 06:40:24,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:40:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-07 06:40:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-07 06:40:24,570 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:24,571 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] [2020-11-07 06:40:24,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:40:24,571 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:24,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:24,572 INFO L82 PathProgramCache]: Analyzing trace with hash -452133408, now seen corresponding path program 1 times [2020-11-07 06:40:24,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:24,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429897947] [2020-11-07 06:40:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:24,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:24,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429897947] [2020-11-07 06:40:24,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:40:24,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 06:40:24,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692742530] [2020-11-07 06:40:24,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:40:24,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:24,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:40:24,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:40:24,701 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 6 states. [2020-11-07 06:40:24,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:24,993 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-11-07 06:40:24,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:40:24,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-11-07 06:40:24,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:24,995 INFO L225 Difference]: With dead ends: 50 [2020-11-07 06:40:24,996 INFO L226 Difference]: Without dead ends: 40 [2020-11-07 06:40:24,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:40:24,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-07 06:40:25,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-11-07 06:40:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-07 06:40:25,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-11-07 06:40:25,012 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 23 [2020-11-07 06:40:25,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:25,013 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-11-07 06:40:25,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:40:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-11-07 06:40:25,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-07 06:40:25,014 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:25,014 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] [2020-11-07 06:40:25,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:40:25,015 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:25,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:25,015 INFO L82 PathProgramCache]: Analyzing trace with hash 645263993, now seen corresponding path program 1 times [2020-11-07 06:40:25,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:25,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12383493] [2020-11-07 06:40:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:25,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:25,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12383493] [2020-11-07 06:40:25,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:25,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-07 06:40:25,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155768033] [2020-11-07 06:40:25,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:40:25,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:25,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:40:25,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:40:25,122 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 7 states. [2020-11-07 06:40:25,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:25,450 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-11-07 06:40:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 06:40:25,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-11-07 06:40:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:25,452 INFO L225 Difference]: With dead ends: 63 [2020-11-07 06:40:25,452 INFO L226 Difference]: Without dead ends: 53 [2020-11-07 06:40:25,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-11-07 06:40:25,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-07 06:40:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2020-11-07 06:40:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-07 06:40:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-07 06:40:25,466 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 29 [2020-11-07 06:40:25,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:25,466 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-07 06:40:25,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:40:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-07 06:40:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 06:40:25,470 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:25,470 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 06:40:25,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:40:25,470 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:25,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:25,471 INFO L82 PathProgramCache]: Analyzing trace with hash -192993544, now seen corresponding path program 1 times [2020-11-07 06:40:25,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:25,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422249872] [2020-11-07 06:40:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:25,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:25,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422249872] [2020-11-07 06:40:25,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:25,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:40:25,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862606762] [2020-11-07 06:40:25,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:40:25,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:25,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:40:25,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:40:25,580 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 8 states. [2020-11-07 06:40:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:25,914 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-11-07 06:40:25,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 06:40:25,915 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-11-07 06:40:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:25,916 INFO L225 Difference]: With dead ends: 55 [2020-11-07 06:40:25,917 INFO L226 Difference]: Without dead ends: 49 [2020-11-07 06:40:25,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:40:25,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-07 06:40:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-11-07 06:40:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-07 06:40:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-11-07 06:40:25,931 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 34 [2020-11-07 06:40:25,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:25,932 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-11-07 06:40:25,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:40:25,932 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-11-07 06:40:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 06:40:25,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:25,934 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, 1, 1] [2020-11-07 06:40:25,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:40:25,934 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:25,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1298798491, now seen corresponding path program 1 times [2020-11-07 06:40:25,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:25,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808899384] [2020-11-07 06:40:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:26,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:26,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-11-07 06:40:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 06:40:26,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808899384] [2020-11-07 06:40:26,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:40:26,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 06:40:26,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090110887] [2020-11-07 06:40:26,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:40:26,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:26,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:40:26,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:40:26,047 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 7 states. [2020-11-07 06:40:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:26,328 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-11-07 06:40:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 06:40:26,328 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-11-07 06:40:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:26,329 INFO L225 Difference]: With dead ends: 52 [2020-11-07 06:40:26,329 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 06:40:26,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-11-07 06:40:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 06:40:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 06:40:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 06:40:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 06:40:26,332 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2020-11-07 06:40:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:26,332 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 06:40:26,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:40:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 06:40:26,332 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 06:40:26,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:40:26,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 06:40:26,830 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 19 [2020-11-07 06:40:27,194 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 17 [2020-11-07 06:40:27,364 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 17 [2020-11-07 06:40:27,659 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 12) the Hoare annotation is: true [2020-11-07 06:40:27,659 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-11-07 06:40:27,659 INFO L269 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-11-07 06:40:27,660 INFO L269 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-11-07 06:40:27,660 INFO L269 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-11-07 06:40:27,660 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: true [2020-11-07 06:40:27,660 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 06:40:27,660 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 06:40:27,660 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2020-11-07 06:40:27,660 INFO L269 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-11-07 06:40:27,661 INFO L269 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-11-07 06:40:27,661 INFO L269 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-11-07 06:40:27,661 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-11-07 06:40:27,661 INFO L269 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-11-07 06:40:27,661 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 06:40:27,661 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 06:40:27,662 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 06:40:27,662 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 06:40:27,662 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 06:40:27,662 INFO L266 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-07 06:40:27,662 INFO L266 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-07 06:40:27,662 INFO L266 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-11-07 06:40:27,662 INFO L266 CegarLoopResult]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2020-11-07 06:40:27,663 INFO L266 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-11-07 06:40:27,663 INFO L262 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~m~0 0)) (.cse2 (<= (+ main_~x~0 1) main_~n~0))) (or (and .cse0 .cse1 .cse2) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0) .cse2) (and .cse1 (= main_~x~0 0) .cse2))) [2020-11-07 06:40:27,663 INFO L262 CegarLoopResult]: At program point L29-1(lines 29 31) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~m~0 0)) (.cse2 (<= (+ main_~x~0 1) main_~n~0))) (or (and .cse0 .cse1 .cse2) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0) .cse2) (and .cse1 (= main_~x~0 0) .cse2))) [2020-11-07 06:40:27,663 INFO L262 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (= main_~m~0 0) (= main_~x~0 0)) [2020-11-07 06:40:27,664 INFO L262 CegarLoopResult]: At program point L29-2(line 29) the Hoare annotation is: (let ((.cse0 (<= (+ main_~x~0 1) main_~n~0))) (or (and (<= 1 main_~x~0) .cse0) (and (= main_~m~0 0) (= main_~x~0 0) .cse0))) [2020-11-07 06:40:27,664 INFO L262 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: (and (= main_~m~0 0) (= main_~x~0 0)) [2020-11-07 06:40:27,664 INFO L262 CegarLoopResult]: At program point L27-2(line 27) the Hoare annotation is: (and (= main_~m~0 0) (= main_~x~0 0)) [2020-11-07 06:40:27,664 INFO L262 CegarLoopResult]: At program point L29-4(line 29) the Hoare annotation is: (let ((.cse1 (<= 1 main_~x~0)) (.cse2 (<= (+ main_~x~0 1) main_~n~0))) (or (and (let ((.cse0 (= main_~m~0 0))) (or (and .cse0 (= main_~x~0 0)) (and .cse1 .cse0))) .cse2) (and .cse1 (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0) .cse2))) [2020-11-07 06:40:27,664 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 24 37) the Hoare annotation is: true [2020-11-07 06:40:27,664 INFO L262 CegarLoopResult]: At program point L29-5(lines 29 31) the Hoare annotation is: (let ((.cse1 (<= 1 main_~x~0)) (.cse2 (<= (+ main_~x~0 1) main_~n~0))) (or (and (let ((.cse0 (= main_~m~0 0))) (or (and .cse0 (= main_~x~0 0)) (and .cse1 .cse0))) .cse2) (and .cse1 (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0) .cse2))) [2020-11-07 06:40:27,665 INFO L269 CegarLoopResult]: At program point mainFINAL(lines 24 37) the Hoare annotation is: true [2020-11-07 06:40:27,665 INFO L262 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (or (= main_~m~0 0) (and (<= 1 main_~x~0) (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0))) [2020-11-07 06:40:27,665 INFO L262 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (let ((.cse0 (<= (+ main_~x~0 1) main_~n~0))) (or (and (<= 1 main_~x~0) .cse0) (and (= main_~m~0 0) (= main_~x~0 0) .cse0))) [2020-11-07 06:40:27,665 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 24 37) the Hoare annotation is: true [2020-11-07 06:40:27,665 INFO L262 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (= main_~x~0 0) [2020-11-07 06:40:27,666 INFO L262 CegarLoopResult]: At program point L28-2(lines 28 33) the Hoare annotation is: (let ((.cse0 (= main_~m~0 0)) (.cse1 (<= 1 main_~x~0))) (or (and .cse0 (= main_~x~0 0)) (and .cse1 .cse0) (and .cse1 (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0)))) [2020-11-07 06:40:27,666 INFO L262 CegarLoopResult]: At program point L28-3(lines 28 33) the Hoare annotation is: (or (= main_~m~0 0) (and (<= 1 main_~x~0) (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0))) [2020-11-07 06:40:27,666 INFO L269 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: true [2020-11-07 06:40:27,666 INFO L262 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 06:40:27,666 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-11-07 06:40:27,666 INFO L262 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 06:40:27,666 INFO L262 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 06:40:27,667 INFO L262 CegarLoopResult]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 06:40:27,667 INFO L262 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 06:40:27,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:40:27 BoogieIcfgContainer [2020-11-07 06:40:27,692 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:40:27,698 INFO L168 Benchmark]: Toolchain (without parser) took 4760.76 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 143.4 MB in the beginning and 173.8 MB in the end (delta: -30.4 MB). Peak memory consumption was 111.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:27,699 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory is still 103.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:40:27,703 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.68 ms. Allocated memory is still 166.7 MB. Free memory was 142.7 MB in the beginning and 133.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:27,705 INFO L168 Benchmark]: Boogie Preprocessor took 35.32 ms. Allocated memory is still 166.7 MB. Free memory was 133.5 MB in the beginning and 132.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:27,714 INFO L168 Benchmark]: RCFGBuilder took 550.13 ms. Allocated memory is still 166.7 MB. Free memory was 132.0 MB in the beginning and 117.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:27,715 INFO L168 Benchmark]: TraceAbstraction took 3798.68 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 117.1 MB in the beginning and 173.8 MB in the end (delta: -56.7 MB). Peak memory consumption was 84.8 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:27,721 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory is still 103.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 357.68 ms. Allocated memory is still 166.7 MB. Free memory was 142.7 MB in the beginning and 133.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.32 ms. Allocated memory is still 166.7 MB. Free memory was 133.5 MB in the beginning and 132.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 550.13 ms. Allocated memory is still 166.7 MB. Free memory was 132.0 MB in the beginning and 117.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3798.68 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 117.1 MB in the beginning and 173.8 MB in the end (delta: -56.7 MB). Peak memory consumption was 84.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((m == 0 && x == 0) || (1 <= x && m == 0)) || ((1 <= x && m + 1 <= n) && 1 <= m) - ProcedureContractResult [Line: 12]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 169 SDtfs, 203 SDslu, 228 SDs, 0 SdLazy, 426 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=4, 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, 5 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 42 LocationsWithAnnotation, 108 PreInvPairs, 154 NumberOfFragments, 367 HoareAnnotationTreeSize, 108 FomulaSimplifications, 2716 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 42 FomulaSimplificationsInter, 990 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 143 ConstructedInterpolants, 0 QuantifiedInterpolants, 11673 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 8/15 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...