/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b3_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:41:44,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:41:44,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:41:44,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 00:41:44,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:41:44,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:41:44,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:41:44,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:41:44,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:41:44,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:41:44,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:41:44,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:41:44,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:41:44,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:41:44,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:41:44,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:41:44,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:41:44,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:41:44,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:41:44,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:41:45,000 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 00:41:45,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:41:45,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:41:45,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:41:45,033 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:41:45,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:41:45,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:41:45,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:41:45,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:41:45,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:41:45,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:41:45,036 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:41:45,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:41:45,036 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:41:45,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:41:45,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:41:45,037 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:41:45,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:41:45,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:41:45,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:41:45,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:41:45,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:41:45,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:41:45,038 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:41:45,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:41:45,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:41:45,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:41:45,494 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:41:45,495 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:41:45,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o5-2.c [2020-11-07 00:41:45,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e22b2d5d2/7e4bab31202346e2b99a391a1fa71291/FLAG2bc1b8035 [2020-11-07 00:41:46,298 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:41:46,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o5-2.c [2020-11-07 00:41:46,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e22b2d5d2/7e4bab31202346e2b99a391a1fa71291/FLAG2bc1b8035 [2020-11-07 00:41:46,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e22b2d5d2/7e4bab31202346e2b99a391a1fa71291 [2020-11-07 00:41:46,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:41:46,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:41:46,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:41:46,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:41:46,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:41:46,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:46" (1/1) ... [2020-11-07 00:41:46,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6db8c9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:46, skipping insertion in model container [2020-11-07 00:41:46,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:46" (1/1) ... [2020-11-07 00:41:46,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:41:46,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:41:47,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:41:47,039 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:41:47,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:41:47,075 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:41:47,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:47 WrapperNode [2020-11-07 00:41:47,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:41:47,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:41:47,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:41:47,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:41:47,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:47" (1/1) ... [2020-11-07 00:41:47,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:47" (1/1) ... [2020-11-07 00:41:47,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:47" (1/1) ... [2020-11-07 00:41:47,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:47" (1/1) ... [2020-11-07 00:41:47,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:47" (1/1) ... [2020-11-07 00:41:47,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:47" (1/1) ... [2020-11-07 00:41:47,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:47" (1/1) ... [2020-11-07 00:41:47,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:41:47,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:41:47,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:41:47,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:41:47,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:47" (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 00:41:47,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:41:47,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:41:47,218 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:41:47,218 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-07 00:41:47,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:41:47,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:41:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:41:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:41:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:41:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:41:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-07 00:41:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:41:47,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:41:47,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:41:47,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:41:47,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:41:47,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:41:47,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:41:47,741 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:41:47,742 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 00:41:47,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:47 BoogieIcfgContainer [2020-11-07 00:41:47,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:41:47,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:41:47,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:41:47,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:41:47,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:41:46" (1/3) ... [2020-11-07 00:41:47,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a4683f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:47, skipping insertion in model container [2020-11-07 00:41:47,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:47" (2/3) ... [2020-11-07 00:41:47,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a4683f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:47, skipping insertion in model container [2020-11-07 00:41:47,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:47" (3/3) ... [2020-11-07 00:41:47,760 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o5-2.c [2020-11-07 00:41:47,775 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:41:47,779 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:41:47,790 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:41:47,819 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:41:47,820 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:41:47,820 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:41:47,820 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:41:47,820 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:41:47,820 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:41:47,820 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:41:47,821 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:41:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-11-07 00:41:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-07 00:41:47,852 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:47,853 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] [2020-11-07 00:41:47,854 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1785484606, now seen corresponding path program 1 times [2020-11-07 00:41:47,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:47,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332120280] [2020-11-07 00:41:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:47,959 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:48,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:48,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:41:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:48,310 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 00:41:48,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332120280] [2020-11-07 00:41:48,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:48,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:41:48,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820531999] [2020-11-07 00:41:48,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:41:48,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:48,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:41:48,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:41:48,352 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2020-11-07 00:41:49,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:49,193 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-11-07 00:41:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:41:49,224 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-11-07 00:41:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:49,238 INFO L225 Difference]: With dead ends: 57 [2020-11-07 00:41:49,239 INFO L226 Difference]: Without dead ends: 37 [2020-11-07 00:41:49,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:41:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-07 00:41:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-07 00:41:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 00:41:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-07 00:41:49,318 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2020-11-07 00:41:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:49,322 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-07 00:41:49,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:41:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-07 00:41:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 00:41:49,325 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:49,325 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-11-07 00:41:49,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:41:49,326 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:49,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:49,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1068328173, now seen corresponding path program 1 times [2020-11-07 00:41:49,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:49,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474806380] [2020-11-07 00:41:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:49,333 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:49,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:49,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:41:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:49,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 00:41:49,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474806380] [2020-11-07 00:41:49,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:49,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:41:49,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889108371] [2020-11-07 00:41:49,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:41:49,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:49,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:41:49,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:41:49,611 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 6 states. [2020-11-07 00:41:50,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:50,189 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-11-07 00:41:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:41:50,191 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-11-07 00:41:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:50,202 INFO L225 Difference]: With dead ends: 59 [2020-11-07 00:41:50,202 INFO L226 Difference]: Without dead ends: 44 [2020-11-07 00:41:50,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:41:50,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-07 00:41:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-11-07 00:41:50,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-07 00:41:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-11-07 00:41:50,247 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-11-07 00:41:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:50,248 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-11-07 00:41:50,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:41:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-11-07 00:41:50,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 00:41:50,253 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:50,253 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-11-07 00:41:50,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:41:50,257 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:50,258 INFO L82 PathProgramCache]: Analyzing trace with hash -781296813, now seen corresponding path program 1 times [2020-11-07 00:41:50,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:50,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376012609] [2020-11-07 00:41:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:50,269 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:50,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:50,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:41:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:50,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 00:41:50,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376012609] [2020-11-07 00:41:50,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:50,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:41:50,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874958244] [2020-11-07 00:41:50,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:41:50,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:41:50,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:41:50,666 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 9 states. [2020-11-07 00:41:51,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:51,389 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-11-07 00:41:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:41:51,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-11-07 00:41:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:51,392 INFO L225 Difference]: With dead ends: 51 [2020-11-07 00:41:51,392 INFO L226 Difference]: Without dead ends: 44 [2020-11-07 00:41:51,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:41:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-07 00:41:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-07 00:41:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-07 00:41:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-11-07 00:41:51,410 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-11-07 00:41:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:51,411 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-11-07 00:41:51,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:41:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-11-07 00:41:51,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 00:41:51,413 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:51,413 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:41:51,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:41:51,414 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:51,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:51,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1351088482, now seen corresponding path program 1 times [2020-11-07 00:41:51,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:51,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849980645] [2020-11-07 00:41:51,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:51,419 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:51,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:51,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:41:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:51,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:51,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:41:51,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849980645] [2020-11-07 00:41:51,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:51,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:41:51,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616086600] [2020-11-07 00:41:51,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:41:51,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:51,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:41:51,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:41:51,585 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 6 states. [2020-11-07 00:41:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:51,878 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-11-07 00:41:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:41:51,879 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-11-07 00:41:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:51,881 INFO L225 Difference]: With dead ends: 53 [2020-11-07 00:41:51,881 INFO L226 Difference]: Without dead ends: 46 [2020-11-07 00:41:51,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:41:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-07 00:41:51,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-11-07 00:41:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-07 00:41:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-11-07 00:41:51,896 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 47 [2020-11-07 00:41:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:51,897 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-11-07 00:41:51,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:41:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-11-07 00:41:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 00:41:51,899 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:51,899 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1] [2020-11-07 00:41:51,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:41:51,899 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:51,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1638119842, now seen corresponding path program 2 times [2020-11-07 00:41:51,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:51,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591997603] [2020-11-07 00:41:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:51,904 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:51,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:51,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:41:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:52,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:52,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:41:52,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591997603] [2020-11-07 00:41:52,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:52,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 00:41:52,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566175995] [2020-11-07 00:41:52,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 00:41:52,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:52,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 00:41:52,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:41:52,125 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-11-07 00:41:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:52,878 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-11-07 00:41:52,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 00:41:52,879 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-11-07 00:41:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:52,881 INFO L225 Difference]: With dead ends: 74 [2020-11-07 00:41:52,881 INFO L226 Difference]: Without dead ends: 53 [2020-11-07 00:41:52,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:41:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-07 00:41:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-11-07 00:41:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-07 00:41:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-11-07 00:41:52,899 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2020-11-07 00:41:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:52,900 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-11-07 00:41:52,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 00:41:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-11-07 00:41:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-07 00:41:52,902 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:52,903 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:41:52,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:41:52,903 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:52,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:52,904 INFO L82 PathProgramCache]: Analyzing trace with hash 24385651, now seen corresponding path program 3 times [2020-11-07 00:41:52,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:52,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995094773] [2020-11-07 00:41:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:52,907 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:52,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:52,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:41:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:53,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:53,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:53,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-07 00:41:53,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995094773] [2020-11-07 00:41:53,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:53,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:41:53,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044317500] [2020-11-07 00:41:53,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:41:53,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:53,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:41:53,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:41:53,192 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 15 states. [2020-11-07 00:41:54,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:54,064 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-11-07 00:41:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 00:41:54,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-11-07 00:41:54,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:54,070 INFO L225 Difference]: With dead ends: 71 [2020-11-07 00:41:54,070 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 00:41:54,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2020-11-07 00:41:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 00:41:54,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 00:41:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 00:41:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 00:41:54,073 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-11-07 00:41:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:54,073 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 00:41:54,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:41:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 00:41:54,073 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 00:41:54,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:41:54,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 00:41:54,815 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 4) the Hoare annotation is: true [2020-11-07 00:41:54,815 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-11-07 00:41:54,816 INFO L269 CegarLoopResult]: At program point reach_errorFINAL(line 4) the Hoare annotation is: true [2020-11-07 00:41:54,816 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) the Hoare annotation is: true [2020-11-07 00:41:54,816 INFO L269 CegarLoopResult]: At program point L4-3(line 4) the Hoare annotation is: true [2020-11-07 00:41:54,816 INFO L269 CegarLoopResult]: At program point L4-4(line 4) the Hoare annotation is: true [2020-11-07 00:41:54,816 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 00:41:54,817 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 00:41:54,817 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 4) the Hoare annotation is: true [2020-11-07 00:41:54,817 INFO L262 CegarLoopResult]: 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|)) [2020-11-07 00:41:54,817 INFO L269 CegarLoopResult]: At program point L4(line 4) the Hoare annotation is: true [2020-11-07 00:41:54,817 INFO L269 CegarLoopResult]: At program point L4-1(line 4) the Hoare annotation is: true [2020-11-07 00:41:54,817 INFO L269 CegarLoopResult]: At program point L4-2(line 4) the Hoare annotation is: true [2020-11-07 00:41:54,817 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 00:41:54,818 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 00:41:54,818 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 00:41:54,818 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 00:41:54,818 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 00:41:54,818 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2020-11-07 00:41:54,818 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 13 19) the Hoare annotation is: true [2020-11-07 00:41:54,818 INFO L262 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: false [2020-11-07 00:41:54,818 INFO L262 CegarLoopResult]: At program point L16(lines 16 18) the Hoare annotation is: (<= main_~result~0 3) [2020-11-07 00:41:54,819 INFO L262 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: false [2020-11-07 00:41:54,819 INFO L269 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-11-07 00:41:54,819 INFO L269 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-11-07 00:41:54,819 INFO L262 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (<= |main_#t~ret9| 3) [2020-11-07 00:41:54,819 INFO L269 CegarLoopResult]: At program point L16-2(lines 13 19) the Hoare annotation is: true [2020-11-07 00:41:54,819 INFO L269 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-11-07 00:41:54,819 INFO L262 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (<= |main_#t~ret9| 3) [2020-11-07 00:41:54,819 INFO L262 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (and (<= main_~result~0 3) (<= |main_#t~ret9| 3)) [2020-11-07 00:41:54,820 INFO L262 CegarLoopResult]: At program point idFINAL(lines 6 11) the Hoare annotation is: (<= |id_#res| 3) [2020-11-07 00:41:54,820 INFO L262 CegarLoopResult]: At program point idEXIT(lines 6 11) the Hoare annotation is: (<= |id_#res| 3) [2020-11-07 00:41:54,820 INFO L269 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-11-07 00:41:54,820 INFO L262 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: (<= id_~ret~0 3) [2020-11-07 00:41:54,820 INFO L269 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-11-07 00:41:54,820 INFO L269 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-11-07 00:41:54,821 INFO L269 CegarLoopResult]: At program point L9-1(line 9) the Hoare annotation is: true [2020-11-07 00:41:54,821 INFO L269 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: true [2020-11-07 00:41:54,821 INFO L269 CegarLoopResult]: At program point L8-1(line 8) the Hoare annotation is: true [2020-11-07 00:41:54,821 INFO L269 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: true [2020-11-07 00:41:54,821 INFO L269 CegarLoopResult]: At program point L8-2(line 8) the Hoare annotation is: true [2020-11-07 00:41:54,821 INFO L269 CegarLoopResult]: At program point L8-3(line 8) the Hoare annotation is: true [2020-11-07 00:41:54,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:41:54 BoogieIcfgContainer [2020-11-07 00:41:54,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:41:54,843 INFO L168 Benchmark]: Toolchain (without parser) took 8155.27 ms. Allocated memory was 151.0 MB in the beginning and 234.9 MB in the end (delta: 83.9 MB). Free memory was 127.6 MB in the beginning and 135.8 MB in the end (delta: -8.3 MB). Peak memory consumption was 106.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:54,844 INFO L168 Benchmark]: CDTParser took 0.24 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. [2020-11-07 00:41:54,845 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.07 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:54,845 INFO L168 Benchmark]: Boogie Preprocessor took 51.81 ms. Allocated memory is still 151.0 MB. Free memory was 117.8 MB in the beginning and 116.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:54,846 INFO L168 Benchmark]: RCFGBuilder took 614.58 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 133.3 MB in the end (delta: -16.9 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:54,847 INFO L168 Benchmark]: TraceAbstraction took 7090.11 ms. Allocated memory was 151.0 MB in the beginning and 234.9 MB in the end (delta: 83.9 MB). Free memory was 132.9 MB in the beginning and 135.8 MB in the end (delta: -3.0 MB). Peak memory consumption was 111.3 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:54,851 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 374.07 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.81 ms. Allocated memory is still 151.0 MB. Free memory was 117.8 MB in the beginning and 116.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 614.58 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 133.3 MB in the end (delta: -16.9 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7090.11 ms. Allocated memory was 151.0 MB in the beginning and 234.9 MB in the end (delta: 83.9 MB). Free memory was 132.9 MB in the beginning and 135.8 MB in the end (delta: -3.0 MB). Peak memory consumption was 111.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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 - ProcedureContractResult [Line: 4]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for id Derived contract for procedure id: \result <= 3 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.2s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 188 SDtfs, 213 SDslu, 467 SDs, 0 SdLazy, 765 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 141 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 42 LocationsWithAnnotation, 74 PreInvPairs, 166 NumberOfFragments, 90 HoareAnnotationTreeSize, 74 FomulaSimplifications, 6354 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 42 FomulaSimplificationsInter, 1718 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...