/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 00:54:52,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 00:54:52,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 00:54:52,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 00:54:52,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 00:54:52,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 00:54:52,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 00:54:52,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 00:54:52,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 00:54:52,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 00:54:52,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 00:54:52,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 00:54:52,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 00:54:52,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 00:54:52,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 00:54:52,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 00:54:52,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 00:54:52,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 00:54:52,955 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 00:54:52,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 00:54:52,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 00:54:52,959 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 00:54:52,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 00:54:52,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 00:54:52,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 00:54:52,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 00:54:52,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 00:54:52,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 00:54:52,962 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 00:54:52,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 00:54:52,962 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 00:54:52,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 00:54:52,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 00:54:52,963 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 00:54:52,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 00:54:52,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 00:54:52,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:54:52,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 00:54:52,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 00:54:52,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 00:54:52,964 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 00:54:53,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 00:54:53,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 00:54:53,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 00:54:53,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 00:54:53,390 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 00:54:53,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-10-24 00:54:53,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e53b1dad/c7ae2a0ef96a4cafb14f9e9e78db974e/FLAGb34d75061 [2020-10-24 00:54:54,078 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 00:54:54,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-10-24 00:54:54,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e53b1dad/c7ae2a0ef96a4cafb14f9e9e78db974e/FLAGb34d75061 [2020-10-24 00:54:54,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e53b1dad/c7ae2a0ef96a4cafb14f9e9e78db974e [2020-10-24 00:54:54,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 00:54:54,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 00:54:54,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 00:54:54,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 00:54:54,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 00:54:54,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:54:54" (1/1) ... [2020-10-24 00:54:54,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d0eba46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:54:54, skipping insertion in model container [2020-10-24 00:54:54,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:54:54" (1/1) ... [2020-10-24 00:54:54,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 00:54:54,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 00:54:54,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:54:54,677 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 00:54:54,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:54:54,711 INFO L208 MainTranslator]: Completed translation [2020-10-24 00:54:54,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:54:54 WrapperNode [2020-10-24 00:54:54,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 00:54:54,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 00:54:54,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 00:54:54,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 00:54:54,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:54:54" (1/1) ... [2020-10-24 00:54:54,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:54:54" (1/1) ... [2020-10-24 00:54:54,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:54:54" (1/1) ... [2020-10-24 00:54:54,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:54:54" (1/1) ... [2020-10-24 00:54:54,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:54:54" (1/1) ... [2020-10-24 00:54:54,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:54:54" (1/1) ... [2020-10-24 00:54:54,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:54:54" (1/1) ... [2020-10-24 00:54:54,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 00:54:54,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 00:54:54,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 00:54:54,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 00:54:54,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:54:54" (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 [2020-10-24 00:54:54,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 00:54:54,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 00:54:54,875 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 00:54:54,875 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-24 00:54:54,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 00:54:54,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 00:54:54,875 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 00:54:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 00:54:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 00:54:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 00:54:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-24 00:54:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 00:54:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 00:54:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 00:54:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 00:54:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 00:54:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 00:54:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 00:54:55,169 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 00:54:55,169 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-24 00:54:55,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:54:55 BoogieIcfgContainer [2020-10-24 00:54:55,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 00:54:55,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 00:54:55,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 00:54:55,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 00:54:55,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:54:54" (1/3) ... [2020-10-24 00:54:55,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9f7dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:54:55, skipping insertion in model container [2020-10-24 00:54:55,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:54:54" (2/3) ... [2020-10-24 00:54:55,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9f7dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:54:55, skipping insertion in model container [2020-10-24 00:54:55,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:54:55" (3/3) ... [2020-10-24 00:54:55,191 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b5_o10-2.c [2020-10-24 00:54:55,219 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 00:54:55,234 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 00:54:55,267 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 00:54:55,310 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 00:54:55,310 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 00:54:55,310 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 00:54:55,310 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 00:54:55,311 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 00:54:55,324 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 00:54:55,324 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 00:54:55,324 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 00:54:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-24 00:54:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-24 00:54:55,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:54:55,361 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] [2020-10-24 00:54:55,362 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:54:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:54:55,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1785484606, now seen corresponding path program 1 times [2020-10-24 00:54:55,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:54:55,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067808621] [2020-10-24 00:54:55,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:54:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:55,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:54:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:55,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 00:54:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:54:55,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067808621] [2020-10-24 00:54:55,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:54:55,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 00:54:55,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170047591] [2020-10-24 00:54:55,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 00:54:55,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:54:55,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 00:54:55,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 00:54:55,802 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2020-10-24 00:54:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:54:56,164 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-10-24 00:54:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 00:54:56,168 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-24 00:54:56,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:54:56,186 INFO L225 Difference]: With dead ends: 57 [2020-10-24 00:54:56,186 INFO L226 Difference]: Without dead ends: 37 [2020-10-24 00:54:56,198 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 [2020-10-24 00:54:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-24 00:54:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-24 00:54:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-24 00:54:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-24 00:54:56,290 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2020-10-24 00:54:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:54:56,292 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-24 00:54:56,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 00:54:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-24 00:54:56,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-24 00:54:56,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:54:56,299 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] [2020-10-24 00:54:56,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 00:54:56,299 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:54:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:54:56,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1068328173, now seen corresponding path program 1 times [2020-10-24 00:54:56,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:54:56,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398008620] [2020-10-24 00:54:56,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:54:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:56,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:54:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:56,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 00:54:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:56,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:54:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-24 00:54:56,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398008620] [2020-10-24 00:54:56,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:54:56,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 00:54:56,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333790814] [2020-10-24 00:54:56,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 00:54:56,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:54:56,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 00:54:56,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 00:54:56,501 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 6 states. [2020-10-24 00:54:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:54:56,767 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-10-24 00:54:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 00:54:56,768 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-24 00:54:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:54:56,770 INFO L225 Difference]: With dead ends: 59 [2020-10-24 00:54:56,770 INFO L226 Difference]: Without dead ends: 44 [2020-10-24 00:54:56,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-24 00:54:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-24 00:54:56,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-24 00:54:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-24 00:54:56,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-24 00:54:56,790 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-10-24 00:54:56,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:54:56,790 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-24 00:54:56,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 00:54:56,790 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-24 00:54:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-24 00:54:56,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:54:56,792 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] [2020-10-24 00:54:56,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 00:54:56,793 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:54:56,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:54:56,793 INFO L82 PathProgramCache]: Analyzing trace with hash -781296813, now seen corresponding path program 1 times [2020-10-24 00:54:56,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:54:56,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116854148] [2020-10-24 00:54:56,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:54:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:56,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:54:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:56,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 00:54:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:56,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:54:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-24 00:54:56,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116854148] [2020-10-24 00:54:56,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:54:56,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 00:54:56,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693240925] [2020-10-24 00:54:56,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 00:54:56,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:54:56,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 00:54:56,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-24 00:54:56,979 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 9 states. [2020-10-24 00:54:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:54:57,430 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-24 00:54:57,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 00:54:57,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-24 00:54:57,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:54:57,432 INFO L225 Difference]: With dead ends: 51 [2020-10-24 00:54:57,432 INFO L226 Difference]: Without dead ends: 44 [2020-10-24 00:54:57,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-24 00:54:57,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-24 00:54:57,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-24 00:54:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-24 00:54:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-24 00:54:57,447 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-10-24 00:54:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:54:57,448 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-24 00:54:57,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 00:54:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-24 00:54:57,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-24 00:54:57,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:54:57,450 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] [2020-10-24 00:54:57,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 00:54:57,451 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:54:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:54:57,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1351088482, now seen corresponding path program 1 times [2020-10-24 00:54:57,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:54:57,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062144008] [2020-10-24 00:54:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:54:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:57,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:54:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:57,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 00:54:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:57,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:54:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:57,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:54:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-24 00:54:57,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062144008] [2020-10-24 00:54:57,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:54:57,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 00:54:57,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895949678] [2020-10-24 00:54:57,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 00:54:57,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:54:57,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 00:54:57,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 00:54:57,621 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 6 states. [2020-10-24 00:54:57,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:54:57,949 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-24 00:54:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 00:54:57,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-24 00:54:57,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:54:57,951 INFO L225 Difference]: With dead ends: 53 [2020-10-24 00:54:57,952 INFO L226 Difference]: Without dead ends: 46 [2020-10-24 00:54:57,952 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 [2020-10-24 00:54:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-24 00:54:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-24 00:54:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-24 00:54:57,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-24 00:54:57,965 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 47 [2020-10-24 00:54:57,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:54:57,966 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-24 00:54:57,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 00:54:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-24 00:54:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-24 00:54:57,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:54:57,967 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] [2020-10-24 00:54:57,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 00:54:57,968 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:54:57,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:54:57,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1638119842, now seen corresponding path program 2 times [2020-10-24 00:54:57,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:54:57,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946951416] [2020-10-24 00:54:57,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:54:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:58,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:54:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:58,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 00:54:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:58,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:54:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:58,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:54:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-24 00:54:58,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946951416] [2020-10-24 00:54:58,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:54:58,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 00:54:58,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769697424] [2020-10-24 00:54:58,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 00:54:58,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:54:58,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 00:54:58,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-24 00:54:58,340 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-10-24 00:54:59,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:54:59,164 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-10-24 00:54:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 00:54:59,167 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-24 00:54:59,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:54:59,169 INFO L225 Difference]: With dead ends: 74 [2020-10-24 00:54:59,169 INFO L226 Difference]: Without dead ends: 53 [2020-10-24 00:54:59,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-10-24 00:54:59,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-24 00:54:59,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-24 00:54:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-24 00:54:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-24 00:54:59,185 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2020-10-24 00:54:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:54:59,186 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-24 00:54:59,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 00:54:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-24 00:54:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-24 00:54:59,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:54:59,188 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] [2020-10-24 00:54:59,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 00:54:59,188 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:54:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:54:59,189 INFO L82 PathProgramCache]: Analyzing trace with hash 24385651, now seen corresponding path program 3 times [2020-10-24 00:54:59,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:54:59,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480277045] [2020-10-24 00:54:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:54:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:59,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:54:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:59,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 00:54:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:59,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:54:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:59,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:54:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:59,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:54:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:54:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-24 00:54:59,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480277045] [2020-10-24 00:54:59,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:54:59,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-24 00:54:59,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530429823] [2020-10-24 00:54:59,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 00:54:59,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:54:59,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 00:54:59,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-24 00:54:59,462 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 15 states. [2020-10-24 00:55:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:55:00,410 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-10-24 00:55:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 00:55:00,410 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-24 00:55:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:55:00,413 INFO L225 Difference]: With dead ends: 81 [2020-10-24 00:55:00,413 INFO L226 Difference]: Without dead ends: 60 [2020-10-24 00:55:00,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2020-10-24 00:55:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-24 00:55:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-24 00:55:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-24 00:55:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-24 00:55:00,431 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 57 [2020-10-24 00:55:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:55:00,432 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-24 00:55:00,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 00:55:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-24 00:55:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-24 00:55:00,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:55:00,434 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1] [2020-10-24 00:55:00,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 00:55:00,434 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:55:00,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:55:00,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1633337214, now seen corresponding path program 4 times [2020-10-24 00:55:00,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:55:00,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525932607] [2020-10-24 00:55:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:55:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:00,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:55:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:00,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 00:55:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:00,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:55:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:00,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:55:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:00,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:55:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:00,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:55:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-24 00:55:00,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525932607] [2020-10-24 00:55:00,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:55:00,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 00:55:00,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898059835] [2020-10-24 00:55:00,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 00:55:00,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:55:00,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 00:55:00,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-24 00:55:00,891 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 18 states. [2020-10-24 00:55:02,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:55:02,028 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2020-10-24 00:55:02,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-24 00:55:02,029 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-10-24 00:55:02,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:55:02,030 INFO L225 Difference]: With dead ends: 88 [2020-10-24 00:55:02,031 INFO L226 Difference]: Without dead ends: 67 [2020-10-24 00:55:02,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 00:55:02,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-24 00:55:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-10-24 00:55:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-24 00:55:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-24 00:55:02,051 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 67 [2020-10-24 00:55:02,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:55:02,052 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-24 00:55:02,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 00:55:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-24 00:55:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-24 00:55:02,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:55:02,054 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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, 1, 1] [2020-10-24 00:55:02,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 00:55:02,055 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:55:02,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:55:02,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1081957779, now seen corresponding path program 5 times [2020-10-24 00:55:02,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:55:02,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106212201] [2020-10-24 00:55:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:55:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:02,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:55:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:02,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 00:55:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:02,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:55:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:02,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:55:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:02,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:55:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:02,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:55:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:02,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-24 00:55:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:55:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-24 00:55:02,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106212201] [2020-10-24 00:55:02,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:55:02,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-24 00:55:02,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591467358] [2020-10-24 00:55:02,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-24 00:55:02,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:55:02,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-24 00:55:02,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-24 00:55:02,542 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 21 states. [2020-10-24 00:55:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:55:03,758 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-10-24 00:55:03,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-24 00:55:03,758 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 77 [2020-10-24 00:55:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:55:03,765 INFO L225 Difference]: With dead ends: 85 [2020-10-24 00:55:03,766 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 00:55:03,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=343, Invalid=1727, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 00:55:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 00:55:03,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 00:55:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 00:55:03,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 00:55:03,774 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2020-10-24 00:55:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:55:03,774 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 00:55:03,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-24 00:55:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 00:55:03,775 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 00:55:03,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 00:55:03,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 00:55:04,421 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 3 [2020-10-24 00:55:04,730 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 4) the Hoare annotation is: true [2020-10-24 00:55:04,731 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-24 00:55:04,731 INFO L277 CegarLoopResult]: At program point reach_errorFINAL(line 4) the Hoare annotation is: true [2020-10-24 00:55:04,731 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) the Hoare annotation is: true [2020-10-24 00:55:04,731 INFO L277 CegarLoopResult]: At program point L4-3(line 4) the Hoare annotation is: true [2020-10-24 00:55:04,731 INFO L277 CegarLoopResult]: At program point L4-4(line 4) the Hoare annotation is: true [2020-10-24 00:55:04,731 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 00:55:04,732 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-24 00:55:04,732 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 4) the Hoare annotation is: true [2020-10-24 00:55:04,733 INFO L270 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|)) [2020-10-24 00:55:04,733 INFO L277 CegarLoopResult]: At program point L4(line 4) the Hoare annotation is: true [2020-10-24 00:55:04,733 INFO L277 CegarLoopResult]: At program point L4-1(line 4) the Hoare annotation is: true [2020-10-24 00:55:04,733 INFO L277 CegarLoopResult]: At program point L4-2(line 4) the Hoare annotation is: true [2020-10-24 00:55:04,733 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-24 00:55:04,733 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-24 00:55:04,733 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 00:55:04,733 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-24 00:55:04,733 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-24 00:55:04,734 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2020-10-24 00:55:04,734 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 13 19) the Hoare annotation is: true [2020-10-24 00:55:04,734 INFO L270 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: false [2020-10-24 00:55:04,734 INFO L270 CegarLoopResult]: At program point L16(lines 16 18) the Hoare annotation is: (<= main_~result~0 5) [2020-10-24 00:55:04,734 INFO L270 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: false [2020-10-24 00:55:04,734 INFO L277 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-10-24 00:55:04,735 INFO L277 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-10-24 00:55:04,735 INFO L270 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (<= |main_#t~ret9| 5) [2020-10-24 00:55:04,735 INFO L277 CegarLoopResult]: At program point L16-2(lines 13 19) the Hoare annotation is: true [2020-10-24 00:55:04,736 INFO L277 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-10-24 00:55:04,737 INFO L270 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (<= |main_#t~ret9| 5) [2020-10-24 00:55:04,737 INFO L270 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (and (<= |main_#t~ret9| 5) (<= main_~result~0 5)) [2020-10-24 00:55:04,737 INFO L270 CegarLoopResult]: At program point idFINAL(lines 6 11) the Hoare annotation is: (<= |id_#res| 5) [2020-10-24 00:55:04,737 INFO L270 CegarLoopResult]: At program point idEXIT(lines 6 11) the Hoare annotation is: (<= |id_#res| 5) [2020-10-24 00:55:04,737 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-10-24 00:55:04,738 INFO L270 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: (<= id_~ret~0 5) [2020-10-24 00:55:04,738 INFO L277 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-10-24 00:55:04,738 INFO L277 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-10-24 00:55:04,739 INFO L277 CegarLoopResult]: At program point L9-1(line 9) the Hoare annotation is: true [2020-10-24 00:55:04,739 INFO L277 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: true [2020-10-24 00:55:04,739 INFO L277 CegarLoopResult]: At program point L8-1(line 8) the Hoare annotation is: true [2020-10-24 00:55:04,739 INFO L277 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: true [2020-10-24 00:55:04,739 INFO L277 CegarLoopResult]: At program point L8-2(line 8) the Hoare annotation is: true [2020-10-24 00:55:04,739 INFO L277 CegarLoopResult]: At program point L8-3(line 8) the Hoare annotation is: true [2020-10-24 00:55:04,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:55:04 BoogieIcfgContainer [2020-10-24 00:55:04,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 00:55:04,768 INFO L168 Benchmark]: Toolchain (without parser) took 10321.87 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 128.2 MB in the beginning and 179.8 MB in the end (delta: -51.6 MB). Peak memory consumption was 147.4 MB. Max. memory is 8.0 GB. [2020-10-24 00:55:04,770 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 00:55:04,771 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.08 ms. Allocated memory is still 151.0 MB. Free memory was 127.5 MB in the beginning and 118.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-24 00:55:04,773 INFO L168 Benchmark]: Boogie Preprocessor took 61.37 ms. Allocated memory is still 151.0 MB. Free memory was 118.5 MB in the beginning and 117.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-24 00:55:04,774 INFO L168 Benchmark]: RCFGBuilder took 395.75 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 103.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-24 00:55:04,774 INFO L168 Benchmark]: TraceAbstraction took 9585.64 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 102.9 MB in the beginning and 179.8 MB in the end (delta: -76.9 MB). Peak memory consumption was 122.2 MB. Max. memory is 8.0 GB. [2020-10-24 00:55:04,787 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.08 ms. Allocated memory is still 151.0 MB. Free memory was 127.5 MB in the beginning and 118.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.37 ms. Allocated memory is still 151.0 MB. Free memory was 118.5 MB in the beginning and 117.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 395.75 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 103.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9585.64 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 102.9 MB in the beginning and 179.8 MB in the end (delta: -76.9 MB). Peak memory consumption was 122.2 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 <= 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.4s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 248 SDtfs, 356 SDslu, 758 SDs, 0 SdLazy, 1282 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 248 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=7, 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, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 42 LocationsWithAnnotation, 82 PreInvPairs, 218 NumberOfFragments, 90 HoareAnnotationTreeSize, 82 FomulaSimplifications, 13744 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 42 FomulaSimplificationsInter, 3364 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 396 NumberOfCodeBlocks, 396 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 388 ConstructedInterpolants, 0 QuantifiedInterpolants, 50224 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 111/281 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...