/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/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:35:20,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:35:20,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:35:20,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 06:35:20,963 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:35:20,976 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:35:20,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:35:20,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:35:20,978 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:35:20,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:35:20,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:35:20,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:35:20,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:35:20,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:35:20,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:35:20,980 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:35:20,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:35:20,981 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:35:20,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:35:20,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:35:20,981 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:35:20,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:35:20,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:35:20,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:20,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:35:20,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:35:20,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:35:20,983 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:35:21,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:35:21,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:35:21,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:35:21,412 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:35:21,413 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:35:21,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-11-07 06:35:21,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d1f2fb9c/8e7f3999518749dfb127a90cc7893b5b/FLAGab2080923 [2020-11-07 06:35:22,100 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:35:22,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2020-11-07 06:35:22,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d1f2fb9c/8e7f3999518749dfb127a90cc7893b5b/FLAGab2080923 [2020-11-07 06:35:22,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d1f2fb9c/8e7f3999518749dfb127a90cc7893b5b [2020-11-07 06:35:22,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:35:22,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:35:22,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:22,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:35:22,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:35:22,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:22" (1/1) ... [2020-11-07 06:35:22,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3616b79a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:22, skipping insertion in model container [2020-11-07 06:35:22,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:22" (1/1) ... [2020-11-07 06:35:22,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:35:22,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:35:22,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:22,788 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:35:22,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:22,823 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:35:22,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:22 WrapperNode [2020-11-07 06:35:22,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:22,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:35:22,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:35:22,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:35:22,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:22" (1/1) ... [2020-11-07 06:35:22,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:22" (1/1) ... [2020-11-07 06:35:22,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:22" (1/1) ... [2020-11-07 06:35:22,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:22" (1/1) ... [2020-11-07 06:35:22,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:22" (1/1) ... [2020-11-07 06:35:22,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:22" (1/1) ... [2020-11-07 06:35:22,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:22" (1/1) ... [2020-11-07 06:35:22,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:35:22,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:35:22,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:35:22,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:35:22,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:22,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:35:22,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:35:22,953 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:35:22,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:35:22,953 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:35:22,953 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:35:22,954 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:35:22,954 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 06:35:22,954 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 06:35:22,954 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:35:22,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:35:22,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:35:22,954 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:35:22,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:35:22,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:35:22,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:35:22,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:35:22,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:35:22,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:35:23,172 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:35:23,173 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:35:23,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:23 BoogieIcfgContainer [2020-11-07 06:35:23,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:35:23,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:35:23,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:35:23,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:35:23,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:35:22" (1/3) ... [2020-11-07 06:35:23,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b34379a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:23, skipping insertion in model container [2020-11-07 06:35:23,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:22" (2/3) ... [2020-11-07 06:35:23,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b34379a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:23, skipping insertion in model container [2020-11-07 06:35:23,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:23" (3/3) ... [2020-11-07 06:35:23,185 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-11-07 06:35:23,225 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:35:23,228 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:35:23,243 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:35:23,277 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:35:23,277 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:35:23,277 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:35:23,296 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:35:23,296 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:35:23,296 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:35:23,297 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:35:23,297 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:35:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-07 06:35:23,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-07 06:35:23,326 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:23,327 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] [2020-11-07 06:35:23,328 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:23,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:23,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1142825126, now seen corresponding path program 1 times [2020-11-07 06:35:23,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:23,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908635123] [2020-11-07 06:35:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:23,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908635123] [2020-11-07 06:35:23,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:23,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 06:35:23,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506685235] [2020-11-07 06:35:23,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 06:35:23,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:23,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 06:35:23,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 06:35:23,751 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-11-07 06:35:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:23,918 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-11-07 06:35:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 06:35:23,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-07 06:35:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:23,929 INFO L225 Difference]: With dead ends: 53 [2020-11-07 06:35:23,930 INFO L226 Difference]: Without dead ends: 30 [2020-11-07 06:35:23,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:35:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-07 06:35:23,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-11-07 06:35:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-07 06:35:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-11-07 06:35:23,987 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-11-07 06:35:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:23,987 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-11-07 06:35:23,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 06:35:23,988 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-11-07 06:35:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-07 06:35:23,989 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:23,989 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] [2020-11-07 06:35:23,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:35:23,990 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:23,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:23,991 INFO L82 PathProgramCache]: Analyzing trace with hash -374088465, now seen corresponding path program 1 times [2020-11-07 06:35:23,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:23,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519347259] [2020-11-07 06:35:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:24,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:24,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519347259] [2020-11-07 06:35:24,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:24,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 06:35:24,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318158914] [2020-11-07 06:35:24,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:35:24,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:24,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:35:24,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:24,128 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 6 states. [2020-11-07 06:35:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:24,517 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-11-07 06:35:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:35:24,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-11-07 06:35:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:24,520 INFO L225 Difference]: With dead ends: 42 [2020-11-07 06:35:24,520 INFO L226 Difference]: Without dead ends: 35 [2020-11-07 06:35:24,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:24,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-07 06:35:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-11-07 06:35:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-07 06:35:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-11-07 06:35:24,535 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-11-07 06:35:24,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:24,536 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-11-07 06:35:24,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:35:24,536 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-11-07 06:35:24,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-07 06:35:24,537 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:24,538 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 06:35:24,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:35:24,539 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:24,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:24,540 INFO L82 PathProgramCache]: Analyzing trace with hash -991599034, now seen corresponding path program 2 times [2020-11-07 06:35:24,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:24,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512277796] [2020-11-07 06:35:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:24,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:24,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512277796] [2020-11-07 06:35:24,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:24,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:35:24,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016846456] [2020-11-07 06:35:24,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:35:24,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:24,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:35:24,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:24,666 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 8 states. [2020-11-07 06:35:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:24,981 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-11-07 06:35:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 06:35:24,981 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-11-07 06:35:24,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:24,983 INFO L225 Difference]: With dead ends: 47 [2020-11-07 06:35:24,983 INFO L226 Difference]: Without dead ends: 40 [2020-11-07 06:35:24,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:35:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-07 06:35:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-11-07 06:35:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 06:35:24,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-11-07 06:35:24,996 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-11-07 06:35:24,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:24,996 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-11-07 06:35:24,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:35:24,996 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-11-07 06:35:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 06:35:24,998 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:24,998 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 06:35:24,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:35:24,998 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1665721521, now seen corresponding path program 3 times [2020-11-07 06:35:24,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:25,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205058144] [2020-11-07 06:35:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:25,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:25,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205058144] [2020-11-07 06:35:25,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:25,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:35:25,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214091878] [2020-11-07 06:35:25,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:35:25,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:25,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:35:25,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:25,160 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 10 states. [2020-11-07 06:35:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:25,619 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-11-07 06:35:25,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:35:25,620 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-11-07 06:35:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:25,621 INFO L225 Difference]: With dead ends: 52 [2020-11-07 06:35:25,621 INFO L226 Difference]: Without dead ends: 45 [2020-11-07 06:35:25,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-07 06:35:25,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-11-07 06:35:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-07 06:35:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-11-07 06:35:25,634 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-11-07 06:35:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:25,635 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-11-07 06:35:25,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:35:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-11-07 06:35:25,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 06:35:25,636 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:25,636 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 06:35:25,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:35:25,637 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:25,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:25,638 INFO L82 PathProgramCache]: Analyzing trace with hash -334879770, now seen corresponding path program 4 times [2020-11-07 06:35:25,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:25,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142209542] [2020-11-07 06:35:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:25,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:25,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142209542] [2020-11-07 06:35:25,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:25,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:35:25,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295197558] [2020-11-07 06:35:25,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:35:25,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:25,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:35:25,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:25,786 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 12 states. [2020-11-07 06:35:26,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:26,389 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-11-07 06:35:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:35:26,390 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-11-07 06:35:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:26,392 INFO L225 Difference]: With dead ends: 57 [2020-11-07 06:35:26,392 INFO L226 Difference]: Without dead ends: 50 [2020-11-07 06:35:26,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:35:26,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-07 06:35:26,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-11-07 06:35:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-07 06:35:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-11-07 06:35:26,420 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-11-07 06:35:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:26,421 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-11-07 06:35:26,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:35:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-11-07 06:35:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-07 06:35:26,425 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:26,426 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 06:35:26,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:35:26,427 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:26,428 INFO L82 PathProgramCache]: Analyzing trace with hash -519577169, now seen corresponding path program 5 times [2020-11-07 06:35:26,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:26,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659605444] [2020-11-07 06:35:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:26,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:26,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659605444] [2020-11-07 06:35:26,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:26,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:35:26,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802016176] [2020-11-07 06:35:26,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:35:26,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:26,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:35:26,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:35:26,708 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 14 states. [2020-11-07 06:35:27,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:27,523 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-11-07 06:35:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 06:35:27,524 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-11-07 06:35:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:27,525 INFO L225 Difference]: With dead ends: 62 [2020-11-07 06:35:27,525 INFO L226 Difference]: Without dead ends: 55 [2020-11-07 06:35:27,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=591, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:35:27,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-07 06:35:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-11-07 06:35:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-07 06:35:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-11-07 06:35:27,543 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-11-07 06:35:27,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:27,544 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-11-07 06:35:27,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:35:27,544 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-11-07 06:35:27,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-07 06:35:27,545 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:27,545 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:27,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:35:27,545 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:27,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:27,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1561745798, now seen corresponding path program 6 times [2020-11-07 06:35:27,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:27,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888656001] [2020-11-07 06:35:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:27,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:27,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888656001] [2020-11-07 06:35:27,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:27,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:35:27,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290778693] [2020-11-07 06:35:27,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:35:27,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:27,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:35:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:35:27,795 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 16 states. [2020-11-07 06:35:28,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:28,733 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-11-07 06:35:28,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 06:35:28,734 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-11-07 06:35:28,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:28,735 INFO L225 Difference]: With dead ends: 67 [2020-11-07 06:35:28,735 INFO L226 Difference]: Without dead ends: 60 [2020-11-07 06:35:28,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=375, Invalid=815, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:35:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-07 06:35:28,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-11-07 06:35:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-07 06:35:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-11-07 06:35:28,756 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-11-07 06:35:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:28,756 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-11-07 06:35:28,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:35:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-11-07 06:35:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-07 06:35:28,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:28,758 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:28,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:35:28,759 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:28,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:28,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1185140721, now seen corresponding path program 7 times [2020-11-07 06:35:28,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:28,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918629595] [2020-11-07 06:35:28,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:29,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:29,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918629595] [2020-11-07 06:35:29,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:29,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:35:29,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291629861] [2020-11-07 06:35:29,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:35:29,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:29,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:35:29,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:35:29,059 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 18 states. [2020-11-07 06:35:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:30,156 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-11-07 06:35:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 06:35:30,156 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2020-11-07 06:35:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:30,158 INFO L225 Difference]: With dead ends: 69 [2020-11-07 06:35:30,158 INFO L226 Difference]: Without dead ends: 62 [2020-11-07 06:35:30,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=485, Invalid=1075, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:35:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-07 06:35:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-07 06:35:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-07 06:35:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-11-07 06:35:30,176 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-11-07 06:35:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:30,177 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-11-07 06:35:30,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:35:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-11-07 06:35:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-07 06:35:30,178 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:30,178 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:30,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:35:30,179 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:30,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:30,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1460930342, now seen corresponding path program 8 times [2020-11-07 06:35:30,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:30,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541384172] [2020-11-07 06:35:30,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:30,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:30,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541384172] [2020-11-07 06:35:30,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:30,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:35:30,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605199692] [2020-11-07 06:35:30,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:35:30,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:30,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:35:30,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:35:30,523 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 14 states. [2020-11-07 06:35:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:31,409 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-11-07 06:35:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 06:35:31,409 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-11-07 06:35:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:31,411 INFO L225 Difference]: With dead ends: 75 [2020-11-07 06:35:31,411 INFO L226 Difference]: Without dead ends: 68 [2020-11-07 06:35:31,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:35:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-07 06:35:31,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-11-07 06:35:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-07 06:35:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-11-07 06:35:31,430 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-11-07 06:35:31,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:31,431 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-11-07 06:35:31,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:35:31,431 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-11-07 06:35:31,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-07 06:35:31,433 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:31,433 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:31,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:35:31,435 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:31,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1125513617, now seen corresponding path program 9 times [2020-11-07 06:35:31,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:31,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975811352] [2020-11-07 06:35:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:31,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 160 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:31,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975811352] [2020-11-07 06:35:31,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:31,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 06:35:31,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438142438] [2020-11-07 06:35:31,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 06:35:31,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:31,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 06:35:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:31,764 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 20 states. [2020-11-07 06:35:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:32,851 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-11-07 06:35:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 06:35:32,851 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 66 [2020-11-07 06:35:32,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:32,852 INFO L225 Difference]: With dead ends: 67 [2020-11-07 06:35:32,852 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 06:35:32,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=505, Invalid=1475, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 06:35:32,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 06:35:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 06:35:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 06:35:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 06:35:32,855 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2020-11-07 06:35:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:32,855 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 06:35:32,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 06:35:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 06:35:32,855 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 06:35:32,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:35:32,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 06:35:33,472 WARN L194 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-11-07 06:35:33,796 WARN L194 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-11-07 06:35:34,147 WARN L194 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-11-07 06:35:34,440 WARN L194 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-11-07 06:35:34,691 WARN L194 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-11-07 06:35:34,746 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 12) the Hoare annotation is: true [2020-11-07 06:35:34,747 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-11-07 06:35:34,747 INFO L269 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-11-07 06:35:34,747 INFO L269 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-11-07 06:35:34,747 INFO L269 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-11-07 06:35:34,748 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: true [2020-11-07 06:35:34,748 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 06:35:34,748 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 06:35:34,748 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2020-11-07 06:35:34,748 INFO L269 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-11-07 06:35:34,748 INFO L269 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-11-07 06:35:34,748 INFO L269 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-11-07 06:35:34,749 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-11-07 06:35:34,749 INFO L269 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-11-07 06:35:34,749 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 06:35:34,749 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 06:35:34,749 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 06:35:34,749 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 06:35:34,749 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 06:35:34,749 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 22 28) the Hoare annotation is: true [2020-11-07 06:35:34,750 INFO L262 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (or (and (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0) (<= main_~sn~0 6)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= 12 main_~sn~0) (<= main_~sn~0 12)) (and (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3) (<= 4 main_~sn~0)) (and (<= main_~i~0 6) (<= 10 main_~sn~0) (<= main_~sn~0 10) (<= 6 main_~i~0)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= 2 main_~sn~0) (<= main_~i~0 2)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14) (<= 14 main_~sn~0)) (and (= main_~sn~0 0) (= main_~i~0 1))) [2020-11-07 06:35:34,750 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 22 28) the Hoare annotation is: true [2020-11-07 06:35:34,750 INFO L262 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: (= main_~sn~0 0) [2020-11-07 06:35:34,750 INFO L269 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-11-07 06:35:34,750 INFO L262 CegarLoopResult]: At program point L24-3(lines 24 26) the Hoare annotation is: (or (and (<= 2 main_~i~0) (<= main_~sn~0 4) (<= main_~i~0 2) (<= 4 main_~sn~0)) (and (<= main_~i~0 8) (<= main_~sn~0 16) (<= 8 main_~i~0) (< 15 main_~sn~0)) (and (<= main_~i~0 6) (<= 12 main_~sn~0) (<= 6 main_~i~0) (<= main_~sn~0 12)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= main_~sn~0 14) (<= 14 main_~sn~0)) (and (<= main_~sn~0 2) (<= 2 main_~sn~0) (= main_~i~0 1)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= 3 main_~i~0) (<= main_~i~0 3)) (and (<= 10 main_~sn~0) (<= 5 main_~i~0) (<= main_~sn~0 10) (<= main_~i~0 5)) (and (<= main_~i~0 4) (<= main_~sn~0 8) (<= 4 main_~i~0) (<= 8 main_~sn~0))) [2020-11-07 06:35:34,751 INFO L262 CegarLoopResult]: At program point L24-4(line 24) the Hoare annotation is: (or (and (<= |main_#t~post3| 3) (<= 6 main_~sn~0) (<= 3 |main_#t~post3|) (<= main_~sn~0 6) (<= 3 main_~i~0) (<= main_~i~0 3)) (and (<= main_~i~0 4) (<= |main_#t~post3| 4) (<= main_~sn~0 8) (<= 4 |main_#t~post3|) (<= 4 main_~i~0) (<= 8 main_~sn~0)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= main_~sn~0 14) (<= 7 |main_#t~post3|) (<= |main_#t~post3| 7) (<= 14 main_~sn~0)) (and (<= 10 main_~sn~0) (<= 5 main_~i~0) (<= |main_#t~post3| 5) (<= main_~sn~0 10) (<= main_~i~0 5) (<= 5 |main_#t~post3|)) (and (<= main_~sn~0 2) (<= 2 main_~sn~0) (= main_~i~0 1) (= |main_#t~post3| 1)) (and (<= main_~i~0 8) (<= main_~sn~0 16) (<= 8 main_~i~0) (< 15 main_~sn~0) (<= 8 |main_#t~post3|)) (and (<= |main_#t~post3| 2) (<= 2 main_~i~0) (<= main_~sn~0 4) (<= 2 |main_#t~post3|) (<= main_~i~0 2) (<= 4 main_~sn~0)) (and (<= main_~i~0 6) (<= 6 |main_#t~post3|) (<= 12 main_~sn~0) (<= 6 main_~i~0) (<= |main_#t~post3| 6) (<= main_~sn~0 12))) [2020-11-07 06:35:34,751 INFO L262 CegarLoopResult]: At program point L24-5(line 24) the Hoare annotation is: (or (and (<= |main_#t~post3| 2) (<= main_~sn~0 4) (<= 2 |main_#t~post3|) (<= 3 main_~i~0) (<= main_~i~0 3) (<= 4 main_~sn~0)) (and (<= main_~i~0 4) (<= |main_#t~post3| 3) (<= 6 main_~sn~0) (<= 4 main_~i~0) (<= 3 |main_#t~post3|) (<= main_~sn~0 6)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= 2 main_~sn~0) (<= main_~i~0 2) (= |main_#t~post3| 1)) (and (<= |main_#t~post3| 4) (<= main_~sn~0 8) (<= 5 main_~i~0) (<= 4 |main_#t~post3|) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= 6 |main_#t~post3|) (<= 12 main_~sn~0) (<= |main_#t~post3| 6) (<= main_~sn~0 12)) (and (<= main_~i~0 6) (<= 10 main_~sn~0) (<= |main_#t~post3| 5) (<= main_~sn~0 10) (<= 6 main_~i~0) (<= 5 |main_#t~post3|)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0) (<= 8 |main_#t~post3|)) (and (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14) (<= 7 |main_#t~post3|) (<= |main_#t~post3| 7) (<= 14 main_~sn~0))) [2020-11-07 06:35:34,752 INFO L262 CegarLoopResult]: At program point L24-6(lines 24 26) the Hoare annotation is: (or (and (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0) (<= main_~sn~0 6)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= 12 main_~sn~0) (<= main_~sn~0 12)) (and (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3) (<= 4 main_~sn~0)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) (and (<= main_~i~0 6) (<= 10 main_~sn~0) (<= main_~sn~0 10) (<= 6 main_~i~0)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= 2 main_~sn~0) (<= main_~i~0 2)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14) (<= 14 main_~sn~0)) (and (= main_~sn~0 0) (= main_~i~0 1))) [2020-11-07 06:35:34,752 INFO L262 CegarLoopResult]: At program point L24-7(lines 24 26) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2020-11-07 06:35:34,752 INFO L269 CegarLoopResult]: At program point mainFINAL(lines 22 28) the Hoare annotation is: true [2020-11-07 06:35:34,752 INFO L262 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 06:35:34,752 INFO L262 CegarLoopResult]: At program point L15(lines 15 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 06:35:34,753 INFO L262 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 06:35:34,753 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2020-11-07 06:35:34,753 INFO L269 CegarLoopResult]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2020-11-07 06:35:34,753 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 14 19) the Hoare annotation is: true [2020-11-07 06:35:34,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:35:34 BoogieIcfgContainer [2020-11-07 06:35:34,775 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:35:34,777 INFO L168 Benchmark]: Toolchain (without parser) took 12320.65 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 127.1 MB in the beginning and 209.2 MB in the end (delta: -82.2 MB). Peak memory consumption was 147.6 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:34,778 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 120.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:35:34,779 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.76 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:34,780 INFO L168 Benchmark]: Boogie Preprocessor took 36.93 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 115.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:34,780 INFO L168 Benchmark]: RCFGBuilder took 312.22 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 103.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:34,781 INFO L168 Benchmark]: TraceAbstraction took 11598.26 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 102.6 MB in the beginning and 209.2 MB in the end (delta: -106.6 MB). Peak memory consumption was 123.5 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:34,784 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 125.3 MB in the beginning and 125.2 MB in the end (delta: 120.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 355.76 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.93 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 115.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 312.22 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 103.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11598.26 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 102.6 MB in the beginning and 209.2 MB in the end (delta: -106.6 MB). Peak memory consumption was 123.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((((((((((i <= 4 && 6 <= sn) && 4 <= i) && sn <= 6) || (((7 <= i && i <= 7) && 12 <= sn) && sn <= 12)) || (((sn <= 4 && 3 <= i) && i <= 3) && 4 <= sn)) || ((9 <= i && sn <= 16) && 15 < sn)) || (((i <= 6 && 10 <= sn) && sn <= 10) && 6 <= i)) || (((2 <= i && sn <= 2) && 2 <= sn) && i <= 2)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn)) || (((i <= 8 && 8 <= i) && sn <= 14) && 14 <= sn)) || (sn == 0 && i == 1) - ProcedureContractResult [Line: 12]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.5s, OverallIterations: 10, TraceHistogramMax: 9, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 273 SDtfs, 427 SDslu, 1036 SDs, 0 SdLazy, 1578 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 260 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=9, 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, 10 MinimizatonAttempts, 22 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 36 LocationsWithAnnotation, 144 PreInvPairs, 208 NumberOfFragments, 672 HoareAnnotationTreeSize, 144 FomulaSimplifications, 60588 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 36 FomulaSimplificationsInter, 1246 FormulaSimplificationTreeSizeReductionInter, 1.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 435 NumberOfCodeBlocks, 435 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 425 ConstructedInterpolants, 0 QuantifiedInterpolants, 63975 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 160/645 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...