/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:45:16,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:45:16,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:45:16,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:45:16,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:45:16,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:45:16,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:45:16,440 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:45:16,479 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:45:16,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:45:16,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:45:16,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:45:16,482 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:45:16,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:45:16,483 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:45:16,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:45:16,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:45:16,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:45:16,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:45:16,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:45:16,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:45:16,485 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:45:16,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:45:16,485 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:45:16,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:45:16,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:45:16,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:45:16,486 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:45:16,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:45:16,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:16,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:45:16,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:45:16,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:45:16,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:45:16,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:45:16,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:45:16,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:45:16,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:45:16,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:45:16,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:45:16,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:45:16,982 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:45:16,983 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:45:16,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-11-06 22:45:17,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/168cf7bcf/1ecd24b2920744b4b672f4362d1b9f3b/FLAGcdc9e3933 [2020-11-06 22:45:17,857 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:45:17,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2020-11-06 22:45:17,867 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/168cf7bcf/1ecd24b2920744b4b672f4362d1b9f3b/FLAGcdc9e3933 [2020-11-06 22:45:18,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/168cf7bcf/1ecd24b2920744b4b672f4362d1b9f3b [2020-11-06 22:45:18,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:45:18,202 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:45:18,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:18,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:45:18,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:45:18,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:18" (1/1) ... [2020-11-06 22:45:18,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d9c990f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18, skipping insertion in model container [2020-11-06 22:45:18,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:18" (1/1) ... [2020-11-06 22:45:18,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:45:18,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:45:18,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:18,445 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:45:18,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:18,483 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:45:18,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18 WrapperNode [2020-11-06 22:45:18,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:18,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:45:18,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:45:18,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:45:18,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2020-11-06 22:45:18,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2020-11-06 22:45:18,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2020-11-06 22:45:18,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2020-11-06 22:45:18,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2020-11-06 22:45:18,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2020-11-06 22:45:18,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2020-11-06 22:45:18,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:45:18,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:45:18,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:45:18,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:45:18,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (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 [2020-11-06 22:45:18,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:45:18,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:45:18,630 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:45:18,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:45:18,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:45:18,631 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:45:18,631 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:45:18,631 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:45:18,632 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:45:18,632 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:45:18,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:45:18,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:45:18,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:45:18,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:45:18,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:45:18,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:45:18,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:45:18,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:45:18,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:45:18,897 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:45:18,897 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:45:18,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:18 BoogieIcfgContainer [2020-11-06 22:45:18,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:45:18,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:45:18,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:45:18,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:45:18,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:18" (1/3) ... [2020-11-06 22:45:18,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8c938c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:18, skipping insertion in model container [2020-11-06 22:45:18,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (2/3) ... [2020-11-06 22:45:18,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8c938c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:18, skipping insertion in model container [2020-11-06 22:45:18,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:18" (3/3) ... [2020-11-06 22:45:18,927 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-11-06 22:45:18,983 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:45:18,991 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:45:19,037 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:45:19,076 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:45:19,076 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:45:19,076 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:45:19,076 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:45:19,077 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:45:19,077 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:45:19,077 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:45:19,077 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:45:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-06 22:45:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:45:19,119 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:19,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:19,120 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:19,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1758911770, now seen corresponding path program 1 times [2020-11-06 22:45:19,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:19,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043277589] [2020-11-06 22:45:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:19,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:19,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043277589] [2020-11-06 22:45:19,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:19,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:45:19,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608117282] [2020-11-06 22:45:19,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:45:19,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:19,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:45:19,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:19,623 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-11-06 22:45:19,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:19,735 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-11-06 22:45:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:45:19,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-11-06 22:45:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:19,763 INFO L225 Difference]: With dead ends: 38 [2020-11-06 22:45:19,764 INFO L226 Difference]: Without dead ends: 16 [2020-11-06 22:45:19,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-06 22:45:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-06 22:45:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-06 22:45:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-06 22:45:19,831 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-11-06 22:45:19,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:19,832 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-06 22:45:19,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:45:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-06 22:45:19,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:45:19,833 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:19,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:19,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:45:19,834 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:19,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1363449627, now seen corresponding path program 1 times [2020-11-06 22:45:19,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:19,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873069188] [2020-11-06 22:45:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:19,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:20,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873069188] [2020-11-06 22:45:20,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:20,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:45:20,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007645121] [2020-11-06 22:45:20,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:45:20,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:20,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:45:20,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:45:20,032 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-11-06 22:45:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:20,131 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-11-06 22:45:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:45:20,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-06 22:45:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:20,133 INFO L225 Difference]: With dead ends: 29 [2020-11-06 22:45:20,133 INFO L226 Difference]: Without dead ends: 19 [2020-11-06 22:45:20,134 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 [2020-11-06 22:45:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-06 22:45:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-11-06 22:45:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-06 22:45:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-06 22:45:20,144 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-11-06 22:45:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:20,144 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-06 22:45:20,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:45:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-06 22:45:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:45:20,145 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:20,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:20,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:45:20,146 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:20,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:20,147 INFO L82 PathProgramCache]: Analyzing trace with hash -692636778, now seen corresponding path program 1 times [2020-11-06 22:45:20,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:20,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305890394] [2020-11-06 22:45:20,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:20,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:20,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305890394] [2020-11-06 22:45:20,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627340538] [2020-11-06 22:45:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:20,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:45:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:20,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:20,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-06 22:45:20,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734809005] [2020-11-06 22:45:20,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:45:20,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:20,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:45:20,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:45:20,423 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-11-06 22:45:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:20,551 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-11-06 22:45:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:45:20,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-06 22:45:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:20,553 INFO L225 Difference]: With dead ends: 32 [2020-11-06 22:45:20,553 INFO L226 Difference]: Without dead ends: 22 [2020-11-06 22:45:20,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:45:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-06 22:45:20,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-11-06 22:45:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-06 22:45:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-06 22:45:20,562 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-11-06 22:45:20,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:20,563 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-06 22:45:20,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:45:20,563 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-06 22:45:20,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:45:20,564 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:20,564 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:20,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:45:20,779 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:20,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1260847419, now seen corresponding path program 2 times [2020-11-06 22:45:20,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:20,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400994339] [2020-11-06 22:45:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:20,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:45:20,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400994339] [2020-11-06 22:45:20,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:20,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:45:20,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491596001] [2020-11-06 22:45:20,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:45:20,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:20,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:45:20,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:45:20,854 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-11-06 22:45:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:20,960 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-11-06 22:45:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:45:20,961 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-06 22:45:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:20,962 INFO L225 Difference]: With dead ends: 32 [2020-11-06 22:45:20,963 INFO L226 Difference]: Without dead ends: 25 [2020-11-06 22:45:20,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:45:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-06 22:45:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-11-06 22:45:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:45:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-11-06 22:45:20,972 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-11-06 22:45:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:20,972 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-11-06 22:45:20,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:45:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-11-06 22:45:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:45:20,973 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:20,973 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:20,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:45:20,974 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:20,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:20,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1381757816, now seen corresponding path program 1 times [2020-11-06 22:45:20,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:20,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656822496] [2020-11-06 22:45:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:21,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:21,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656822496] [2020-11-06 22:45:21,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651194871] [2020-11-06 22:45:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:21,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 22:45:21,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:21,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:21,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-06 22:45:21,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417684858] [2020-11-06 22:45:21,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:45:21,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:21,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:45:21,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:45:21,202 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-11-06 22:45:21,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:21,343 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-11-06 22:45:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:45:21,366 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-11-06 22:45:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:21,367 INFO L225 Difference]: With dead ends: 38 [2020-11-06 22:45:21,368 INFO L226 Difference]: Without dead ends: 26 [2020-11-06 22:45:21,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:45:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-06 22:45:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-06 22:45:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:45:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-06 22:45:21,376 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-11-06 22:45:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:21,376 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-06 22:45:21,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:45:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-06 22:45:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:45:21,377 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:21,377 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:21,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:21,591 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:21,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:21,593 INFO L82 PathProgramCache]: Analyzing trace with hash -312331939, now seen corresponding path program 2 times [2020-11-06 22:45:21,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:21,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045405355] [2020-11-06 22:45:21,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:21,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:21,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045405355] [2020-11-06 22:45:21,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148432568] [2020-11-06 22:45:21,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:21,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:45:21,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:21,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:45:21,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:21,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:21,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-06 22:45:21,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404422235] [2020-11-06 22:45:21,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:45:21,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:21,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:45:21,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:45:21,807 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2020-11-06 22:45:22,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:22,064 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-11-06 22:45:22,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:45:22,065 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-11-06 22:45:22,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:22,068 INFO L225 Difference]: With dead ends: 38 [2020-11-06 22:45:22,068 INFO L226 Difference]: Without dead ends: 31 [2020-11-06 22:45:22,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:45:22,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-06 22:45:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-11-06 22:45:22,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-06 22:45:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-11-06 22:45:22,090 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2020-11-06 22:45:22,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:22,090 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-11-06 22:45:22,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:45:22,090 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-11-06 22:45:22,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-06 22:45:22,093 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:22,093 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:22,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:22,308 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1478637590, now seen corresponding path program 3 times [2020-11-06 22:45:22,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:22,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707066466] [2020-11-06 22:45:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:22,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:22,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707066466] [2020-11-06 22:45:22,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805873723] [2020-11-06 22:45:22,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:22,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-06 22:45:22,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:22,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:45:22,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:45:22,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:22,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 9 [2020-11-06 22:45:22,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743852003] [2020-11-06 22:45:22,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:45:22,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:22,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:45:22,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:45:22,535 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-11-06 22:45:22,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:22,901 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-11-06 22:45:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:45:22,902 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-11-06 22:45:22,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:22,903 INFO L225 Difference]: With dead ends: 41 [2020-11-06 22:45:22,903 INFO L226 Difference]: Without dead ends: 34 [2020-11-06 22:45:22,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:45:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-06 22:45:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-11-06 22:45:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:45:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-11-06 22:45:22,912 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2020-11-06 22:45:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:22,912 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-11-06 22:45:22,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:45:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-11-06 22:45:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-06 22:45:22,913 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:22,913 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:23,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:23,129 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:23,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:23,130 INFO L82 PathProgramCache]: Analyzing trace with hash -126842179, now seen corresponding path program 4 times [2020-11-06 22:45:23,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:23,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545929540] [2020-11-06 22:45:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:23,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:23,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545929540] [2020-11-06 22:45:23,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779962032] [2020-11-06 22:45:23,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:23,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:45:23,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:23,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:45:23,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:23,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:23,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-11-06 22:45:23,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146267317] [2020-11-06 22:45:23,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:45:23,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:23,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:45:23,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:45:23,342 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 11 states. [2020-11-06 22:45:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:23,661 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-11-06 22:45:23,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:45:23,662 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-11-06 22:45:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:23,663 INFO L225 Difference]: With dead ends: 44 [2020-11-06 22:45:23,663 INFO L226 Difference]: Without dead ends: 37 [2020-11-06 22:45:23,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:45:23,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-06 22:45:23,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-11-06 22:45:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-06 22:45:23,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-11-06 22:45:23,671 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2020-11-06 22:45:23,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:23,671 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-11-06 22:45:23,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:45:23,671 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-11-06 22:45:23,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-06 22:45:23,672 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:23,672 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:23,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:23,886 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:23,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:23,888 INFO L82 PathProgramCache]: Analyzing trace with hash -218832202, now seen corresponding path program 5 times [2020-11-06 22:45:23,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:23,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832374567] [2020-11-06 22:45:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:24,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:24,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832374567] [2020-11-06 22:45:24,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213172234] [2020-11-06 22:45:24,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:24,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-06 22:45:24,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:24,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:45:24,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:45:24,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:24,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 11 [2020-11-06 22:45:24,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322604020] [2020-11-06 22:45:24,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:45:24,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:24,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:45:24,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:45:24,178 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-11-06 22:45:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:24,538 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-11-06 22:45:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:45:24,539 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-11-06 22:45:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:24,540 INFO L225 Difference]: With dead ends: 45 [2020-11-06 22:45:24,540 INFO L226 Difference]: Without dead ends: 38 [2020-11-06 22:45:24,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:45:24,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-06 22:45:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-06 22:45:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 22:45:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-11-06 22:45:24,556 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 34 [2020-11-06 22:45:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:24,557 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-11-06 22:45:24,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:45:24,557 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-11-06 22:45:24,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-06 22:45:24,558 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:24,559 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:24,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:24,773 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:24,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:24,774 INFO L82 PathProgramCache]: Analyzing trace with hash -504472547, now seen corresponding path program 6 times [2020-11-06 22:45:24,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:24,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459540349] [2020-11-06 22:45:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:24,792 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:24,806 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:24,830 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:45:24,831 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:45:24,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 22:45:24,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:24 BoogieIcfgContainer [2020-11-06 22:45:24,870 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:24,872 INFO L168 Benchmark]: Toolchain (without parser) took 6674.81 ms. Allocated memory was 152.0 MB in the beginning and 188.7 MB in the end (delta: 36.7 MB). Free memory was 127.3 MB in the beginning and 93.9 MB in the end (delta: 33.4 MB). Peak memory consumption was 71.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:24,873 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory was 125.0 MB in the beginning and 124.5 MB in the end (delta: 436.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:24,874 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.31 ms. Allocated memory is still 152.0 MB. Free memory was 126.7 MB in the beginning and 117.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:24,874 INFO L168 Benchmark]: Boogie Preprocessor took 42.16 ms. Allocated memory is still 152.0 MB. Free memory was 117.7 MB in the beginning and 116.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:24,875 INFO L168 Benchmark]: RCFGBuilder took 370.26 ms. Allocated memory is still 152.0 MB. Free memory was 116.2 MB in the beginning and 102.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:24,876 INFO L168 Benchmark]: TraceAbstraction took 5967.72 ms. Allocated memory was 152.0 MB in the beginning and 188.7 MB in the end (delta: 36.7 MB). Free memory was 102.1 MB in the beginning and 93.9 MB in the end (delta: 8.2 MB). Peak memory consumption was 46.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:24,880 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory was 125.0 MB in the beginning and 124.5 MB in the end (delta: 436.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.31 ms. Allocated memory is still 152.0 MB. Free memory was 126.7 MB in the beginning and 117.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.16 ms. Allocated memory is still 152.0 MB. Free memory was 117.7 MB in the beginning and 116.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 370.26 ms. Allocated memory is still 152.0 MB. Free memory was 116.2 MB in the beginning and 102.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5967.72 ms. Allocated memory was 152.0 MB in the beginning and 188.7 MB in the end (delta: 36.7 MB). Free memory was 102.1 MB in the beginning and 93.9 MB in the end (delta: 8.2 MB). Peak memory consumption was 46.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, sn=0; [L24] i=1 VAL [i=1, sn=0] [L24] COND TRUE i<=8 VAL [i=1, sn=0] [L25] COND TRUE i<4 [L26] sn = sn + (2) VAL [i=1, sn=2] [L24] i++ VAL [i=2, sn=2] [L24] COND TRUE i<=8 VAL [i=2, sn=2] [L25] COND TRUE i<4 [L26] sn = sn + (2) VAL [i=2, sn=4] [L24] i++ VAL [i=3, sn=4] [L24] COND TRUE i<=8 VAL [i=3, sn=4] [L25] COND TRUE i<4 [L26] sn = sn + (2) VAL [i=3, sn=6] [L24] i++ VAL [i=4, sn=6] [L24] COND TRUE i<=8 VAL [i=4, sn=6] [L25] COND FALSE !(i<4) VAL [i=4, sn=6] [L24] i++ VAL [i=5, sn=6] [L24] COND TRUE i<=8 VAL [i=5, sn=6] [L25] COND FALSE !(i<4) VAL [i=5, sn=6] [L24] i++ VAL [i=6, sn=6] [L24] COND TRUE i<=8 VAL [i=6, sn=6] [L25] COND FALSE !(i<4) VAL [i=6, sn=6] [L24] i++ VAL [i=7, sn=6] [L24] COND TRUE i<=8 VAL [i=7, sn=6] [L25] COND FALSE !(i<4) VAL [i=7, sn=6] [L24] i++ VAL [i=8, sn=6] [L24] COND TRUE i<=8 VAL [i=8, sn=6] [L25] COND FALSE !(i<4) VAL [i=8, sn=6] [L24] i++ VAL [i=9, sn=6] [L24] COND FALSE !(i<=8) VAL [i=9, sn=6] [L28] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum04-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.7s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 242 SDslu, 169 SDs, 0 SdLazy, 312 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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, 9 MinimizatonAttempts, 10 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 394 NumberOfCodeBlocks, 389 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 342 ConstructedInterpolants, 0 QuantifiedInterpolants, 21348 SizeOfPredicates, 5 NumberOfNonLiveVariables, 563 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 87/387 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 incorrect! Received shutdown request...