/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_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:27:24,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:27:24,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:27:24,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:27:24,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:27:24,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:27:24,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:27:24,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:27:24,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:27:24,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:27:24,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:27:24,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:27:24,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:27:24,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:27:24,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:27:24,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:27:24,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:27:24,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:27:24,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:27:24,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:27:24,853 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:27:24,877 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:27:24,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:27:24,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:27:24,883 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:27:24,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:27:24,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:27:24,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:27:24,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:27:24,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:27:24,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:27:24,886 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:27:24,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:27:24,886 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:27:24,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:27:24,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:27:24,887 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:27:24,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:27:24,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:27:24,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:27:24,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:27:24,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:27:24,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:27:24,889 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:27:25,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:27:25,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:27:25,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:27:25,384 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:27:25,385 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:27:25,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-10-23 20:27:25,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a77ff5421/5087a6fffc75464b89af317bce5f56ce/FLAGe1b6b42fc [2020-10-23 20:27:26,146 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:27:26,146 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-10-23 20:27:26,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a77ff5421/5087a6fffc75464b89af317bce5f56ce/FLAGe1b6b42fc [2020-10-23 20:27:26,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a77ff5421/5087a6fffc75464b89af317bce5f56ce [2020-10-23 20:27:26,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:27:26,552 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:27:26,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:27:26,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:27:26,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:27:26,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:27:26" (1/1) ... [2020-10-23 20:27:26,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47c8562f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:26, skipping insertion in model container [2020-10-23 20:27:26,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:27:26" (1/1) ... [2020-10-23 20:27:26,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:27:26,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:27:26,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:27:26,838 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:27:26,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:27:26,875 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:27:26,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:26 WrapperNode [2020-10-23 20:27:26,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:27:26,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:27:26,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:27:26,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:27:26,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:26" (1/1) ... [2020-10-23 20:27:26,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:26" (1/1) ... [2020-10-23 20:27:26,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:26" (1/1) ... [2020-10-23 20:27:26,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:26" (1/1) ... [2020-10-23 20:27:26,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:26" (1/1) ... [2020-10-23 20:27:26,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:26" (1/1) ... [2020-10-23 20:27:26,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:26" (1/1) ... [2020-10-23 20:27:26,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:27:26,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:27:26,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:27:26,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:27:26,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:26" (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 [2020-10-23 20:27:27,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:27:27,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:27:27,017 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:27:27,017 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 20:27:27,017 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:27:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:27:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:27:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:27:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:27:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:27:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 20:27:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:27:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:27:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:27:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:27:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:27:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:27:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:27:27,262 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:27:27,263 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:27:27,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:27:27 BoogieIcfgContainer [2020-10-23 20:27:27,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:27:27,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:27:27,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:27:27,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:27:27,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:27:26" (1/3) ... [2020-10-23 20:27:27,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e8a71e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:27:27, skipping insertion in model container [2020-10-23 20:27:27,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:26" (2/3) ... [2020-10-23 20:27:27,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e8a71e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:27:27, skipping insertion in model container [2020-10-23 20:27:27,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:27:27" (3/3) ... [2020-10-23 20:27:27,275 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2020-10-23 20:27:27,291 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:27:27,301 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:27:27,350 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:27:27,381 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:27:27,382 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:27:27,382 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:27:27,382 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:27:27,382 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:27:27,382 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:27:27,382 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:27:27,383 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:27:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-23 20:27:27,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 20:27:27,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:27,410 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] [2020-10-23 20:27:27,411 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:27,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:27,418 INFO L82 PathProgramCache]: Analyzing trace with hash -742560695, now seen corresponding path program 1 times [2020-10-23 20:27:27,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:27,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860042068] [2020-10-23 20:27:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:27,531 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:27,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:27,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:27:27,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860042068] [2020-10-23 20:27:27,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:27,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:27:27,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313833955] [2020-10-23 20:27:27,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:27:27,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:27,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:27:27,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:27:27,902 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 6 states. [2020-10-23 20:27:28,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:28,268 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-23 20:27:28,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:28,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-23 20:27:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:28,281 INFO L225 Difference]: With dead ends: 52 [2020-10-23 20:27:28,281 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 20:27:28,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:27:28,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 20:27:28,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 20:27:28,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 20:27:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-23 20:27:28,343 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2020-10-23 20:27:28,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:28,344 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-23 20:27:28,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:27:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-23 20:27:28,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 20:27:28,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:28,348 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] [2020-10-23 20:27:28,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:27:28,348 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1024612499, now seen corresponding path program 1 times [2020-10-23 20:27:28,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:28,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121526072] [2020-10-23 20:27:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:28,355 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:27:28,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121526072] [2020-10-23 20:27:28,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:28,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:27:28,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542271630] [2020-10-23 20:27:28,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:27:28,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:28,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:27:28,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:27:28,551 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 7 states. [2020-10-23 20:27:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:28,834 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-10-23 20:27:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:28,835 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-23 20:27:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:28,837 INFO L225 Difference]: With dead ends: 44 [2020-10-23 20:27:28,837 INFO L226 Difference]: Without dead ends: 37 [2020-10-23 20:27:28,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:27:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-23 20:27:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-23 20:27:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-23 20:27:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-23 20:27:28,853 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2020-10-23 20:27:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:28,854 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-23 20:27:28,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:27:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-23 20:27:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 20:27:28,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:28,856 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] [2020-10-23 20:27:28,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:27:28,857 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:28,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:28,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1157111945, now seen corresponding path program 2 times [2020-10-23 20:27:28,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:28,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251879837] [2020-10-23 20:27:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:28,862 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 20:27:29,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251879837] [2020-10-23 20:27:29,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:29,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:27:29,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331075673] [2020-10-23 20:27:29,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:27:29,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:29,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:27:29,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:27:29,063 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 8 states. [2020-10-23 20:27:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:29,435 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-23 20:27:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 20:27:29,436 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-23 20:27:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:29,437 INFO L225 Difference]: With dead ends: 49 [2020-10-23 20:27:29,437 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 20:27:29,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-23 20:27:29,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 20:27:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-23 20:27:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 20:27:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-23 20:27:29,468 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 41 [2020-10-23 20:27:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:29,469 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-23 20:27:29,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:27:29,469 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-23 20:27:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-23 20:27:29,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:29,474 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-23 20:27:29,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:27:29,476 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:29,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2083092563, now seen corresponding path program 3 times [2020-10-23 20:27:29,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:29,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221375148] [2020-10-23 20:27:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:29,481 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 20:27:29,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221375148] [2020-10-23 20:27:29,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:29,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:27:29,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65025948] [2020-10-23 20:27:29,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:27:29,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:29,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:27:29,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:27:29,686 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 9 states. [2020-10-23 20:27:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:30,051 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-10-23 20:27:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 20:27:30,052 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-10-23 20:27:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:30,053 INFO L225 Difference]: With dead ends: 54 [2020-10-23 20:27:30,054 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 20:27:30,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:27:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 20:27:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 20:27:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 20:27:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-23 20:27:30,068 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 49 [2020-10-23 20:27:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:30,069 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-23 20:27:30,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:27:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-23 20:27:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 20:27:30,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:30,071 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:27:30,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:27:30,072 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:30,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:30,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2025718985, now seen corresponding path program 4 times [2020-10-23 20:27:30,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:30,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795491158] [2020-10-23 20:27:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:30,076 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:30,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:30,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:30,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:30,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:30,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:30,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 20:27:30,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795491158] [2020-10-23 20:27:30,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:30,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:27:30,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259900991] [2020-10-23 20:27:30,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:27:30,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:30,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:27:30,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:27:30,268 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 10 states. [2020-10-23 20:27:30,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:30,728 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-10-23 20:27:30,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:27:30,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-23 20:27:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:30,731 INFO L225 Difference]: With dead ends: 59 [2020-10-23 20:27:30,731 INFO L226 Difference]: Without dead ends: 52 [2020-10-23 20:27:30,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:27:30,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-23 20:27:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-23 20:27:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-23 20:27:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-23 20:27:30,745 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 57 [2020-10-23 20:27:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:30,746 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-23 20:27:30,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:27:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-23 20:27:30,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-23 20:27:30,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:30,748 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:27:30,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:27:30,748 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:30,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:30,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2086365203, now seen corresponding path program 5 times [2020-10-23 20:27:30,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:30,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519306320] [2020-10-23 20:27:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:30,753 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:27:30,768 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:27:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:27:30,781 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:27:30,811 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:27:30,812 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:27:30,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:27:30,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:27:30 BoogieIcfgContainer [2020-10-23 20:27:30,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:27:30,836 INFO L168 Benchmark]: Toolchain (without parser) took 4288.37 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 128.0 MB in the beginning and 147.4 MB in the end (delta: -19.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:30,837 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 125.5 MB in the end (delta: 120.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:27:30,837 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.25 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 118.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:30,838 INFO L168 Benchmark]: Boogie Preprocessor took 50.89 ms. Allocated memory is still 151.0 MB. Free memory was 118.4 MB in the beginning and 117.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:30,839 INFO L168 Benchmark]: RCFGBuilder took 334.29 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 104.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:30,840 INFO L168 Benchmark]: TraceAbstraction took 3565.70 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 104.0 MB in the beginning and 147.4 MB in the end (delta: -43.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:27:30,848 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 125.5 MB in the end (delta: 120.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 319.25 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 118.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.89 ms. Allocated memory is still 151.0 MB. Free memory was 118.4 MB in the beginning and 117.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 334.29 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 104.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3565.70 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 104.0 MB in the beginning and 147.4 MB in the end (delta: -43.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = 5; [L13] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 5 [L15] CALL reach_error() [L4] __assert_fail("0", "id_i5_o5-1.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 138 SDtfs, 216 SDslu, 253 SDs, 0 SdLazy, 326 SolverSat, 71 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 incorrect! Received shutdown request...