/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-regression/test22-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:52:43,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:52:43,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:52:43,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:52:43,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:52:43,519 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:52:43,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:52:43,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:52:43,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:52:43,521 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:52:43,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:52:43,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:52:43,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:52:43,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:52:43,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:52:43,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:52:43,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:52:43,523 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:52:43,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:52:43,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:52:43,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:52:43,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:52:43,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:52:43,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:52:43,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:52:43,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:52:43,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:52:43,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:52:43,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:52:43,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:52:43,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:52:43,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:52:43,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:52:43,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:52:43,994 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:52:43,995 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:52:43,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test22-1.c [2020-12-22 03:52:44,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c395a6533/07ba4022d8da4efb93dc68f6d55e42f6/FLAG43ae305e2 [2020-12-22 03:52:44,690 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:52:44,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-1.c [2020-12-22 03:52:44,698 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c395a6533/07ba4022d8da4efb93dc68f6d55e42f6/FLAG43ae305e2 [2020-12-22 03:52:45,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c395a6533/07ba4022d8da4efb93dc68f6d55e42f6 [2020-12-22 03:52:45,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:52:45,062 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:52:45,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:45,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:52:45,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:52:45,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238f0f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45, skipping insertion in model container [2020-12-22 03:52:45,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:52:45,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:52:45,287 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-1.c[1029,1042] [2020-12-22 03:52:45,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:45,301 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:52:45,321 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-1.c[1029,1042] [2020-12-22 03:52:45,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:45,339 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:52:45,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45 WrapperNode [2020-12-22 03:52:45,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:45,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:45,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:52:45,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:52:45,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:45,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:52:45,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:52:45,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:52:45,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:52:45,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:52:45,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:52:45,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:52:45,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (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 [2020-12-22 03:52:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:52:45,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:52:45,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:52:45,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:52:45,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:52:45,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:52:46,103 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:52:46,104 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-22 03:52:46,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:46 BoogieIcfgContainer [2020-12-22 03:52:46,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:52:46,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:52:46,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:52:46,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:52:46,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:52:45" (1/3) ... [2020-12-22 03:52:46,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbd7939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:46, skipping insertion in model container [2020-12-22 03:52:46,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (2/3) ... [2020-12-22 03:52:46,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbd7939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:46, skipping insertion in model container [2020-12-22 03:52:46,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:46" (3/3) ... [2020-12-22 03:52:46,116 INFO L111 eAbstractionObserver]: Analyzing ICFG test22-1.c [2020-12-22 03:52:46,124 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:52:46,130 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:52:46,150 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:52:46,181 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:52:46,181 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:52:46,181 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:52:46,182 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:52:46,182 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:52:46,182 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:52:46,182 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:52:46,182 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:52:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-22 03:52:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 03:52:46,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:46,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:46,206 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash 164664103, now seen corresponding path program 1 times [2020-12-22 03:52:46,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:46,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758207866] [2020-12-22 03:52:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:46,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758207866] [2020-12-22 03:52:46,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:46,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:52:46,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53505453] [2020-12-22 03:52:46,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:52:46,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:46,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:52:46,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:52:46,477 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-22 03:52:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:46,495 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-12-22 03:52:46,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:52:46,497 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-12-22 03:52:46,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:46,506 INFO L225 Difference]: With dead ends: 34 [2020-12-22 03:52:46,506 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 03:52:46,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:52:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 03:52:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 03:52:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 03:52:46,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-22 03:52:46,556 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 19 [2020-12-22 03:52:46,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:46,557 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-22 03:52:46,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:52:46,557 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-22 03:52:46,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 03:52:46,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:46,559 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] [2020-12-22 03:52:46,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:52:46,560 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash 603612068, now seen corresponding path program 1 times [2020-12-22 03:52:46,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:46,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313919083] [2020-12-22 03:52:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:46,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313919083] [2020-12-22 03:52:46,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:46,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 03:52:46,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136371866] [2020-12-22 03:52:46,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:52:46,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:46,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:52:46,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:52:46,982 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 10 states. [2020-12-22 03:52:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:47,446 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2020-12-22 03:52:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 03:52:47,447 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-22 03:52:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:47,449 INFO L225 Difference]: With dead ends: 96 [2020-12-22 03:52:47,449 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 03:52:47,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:52:47,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 03:52:47,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 33. [2020-12-22 03:52:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 03:52:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-12-22 03:52:47,463 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2020-12-22 03:52:47,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:47,464 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-12-22 03:52:47,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:52:47,464 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-12-22 03:52:47,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 03:52:47,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:47,465 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] [2020-12-22 03:52:47,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:52:47,466 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:47,466 INFO L82 PathProgramCache]: Analyzing trace with hash -407505182, now seen corresponding path program 1 times [2020-12-22 03:52:47,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:47,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136240002] [2020-12-22 03:52:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:47,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136240002] [2020-12-22 03:52:47,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:47,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 03:52:47,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492618127] [2020-12-22 03:52:47,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:52:47,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:47,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:52:47,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:52:47,574 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 10 states. [2020-12-22 03:52:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:47,967 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-12-22 03:52:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 03:52:47,968 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-22 03:52:47,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:47,969 INFO L225 Difference]: With dead ends: 91 [2020-12-22 03:52:47,970 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 03:52:47,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2020-12-22 03:52:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 03:52:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 33. [2020-12-22 03:52:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 03:52:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-22 03:52:47,980 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2020-12-22 03:52:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:47,980 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-22 03:52:47,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:52:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-22 03:52:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 03:52:47,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:47,982 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] [2020-12-22 03:52:47,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:52:47,982 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash -984735834, now seen corresponding path program 1 times [2020-12-22 03:52:47,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:47,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389996017] [2020-12-22 03:52:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:48,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389996017] [2020-12-22 03:52:48,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:48,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 03:52:48,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338536939] [2020-12-22 03:52:48,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:52:48,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:48,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:52:48,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:52:48,137 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 10 states. [2020-12-22 03:52:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:48,491 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-12-22 03:52:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 03:52:48,493 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-22 03:52:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:48,494 INFO L225 Difference]: With dead ends: 81 [2020-12-22 03:52:48,495 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 03:52:48,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:52:48,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 03:52:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2020-12-22 03:52:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 03:52:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-12-22 03:52:48,503 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 20 [2020-12-22 03:52:48,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:48,504 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-12-22 03:52:48,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:52:48,504 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-12-22 03:52:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 03:52:48,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:48,505 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] [2020-12-22 03:52:48,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 03:52:48,505 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:48,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:48,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1995853084, now seen corresponding path program 1 times [2020-12-22 03:52:48,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:48,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64959153] [2020-12-22 03:52:48,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:48,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64959153] [2020-12-22 03:52:48,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:48,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 03:52:48,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13200638] [2020-12-22 03:52:48,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:52:48,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:48,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:52:48,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:52:48,657 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2020-12-22 03:52:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:49,114 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-12-22 03:52:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 03:52:49,114 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-22 03:52:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:49,116 INFO L225 Difference]: With dead ends: 73 [2020-12-22 03:52:49,116 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 03:52:49,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:52:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 03:52:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 26. [2020-12-22 03:52:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 03:52:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-22 03:52:49,123 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2020-12-22 03:52:49,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:49,124 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-22 03:52:49,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:52:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-22 03:52:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 03:52:49,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:49,125 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:49,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 03:52:49,125 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:49,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1760411593, now seen corresponding path program 1 times [2020-12-22 03:52:49,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:49,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477167994] [2020-12-22 03:52:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:49,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477167994] [2020-12-22 03:52:49,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593658279] [2020-12-22 03:52:49,340 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 [2020-12-22 03:52:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:49,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 03:52:49,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:50,172 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-12-22 03:52:50,177 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:52:50,184 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:52:50,186 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:52:50,186 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2020-12-22 03:52:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:50,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:50,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2020-12-22 03:52:50,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413864160] [2020-12-22 03:52:50,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 03:52:50,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:50,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 03:52:50,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:52:50,241 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 24 states. [2020-12-22 03:52:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:51,668 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-12-22 03:52:51,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 03:52:51,669 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 22 [2020-12-22 03:52:51,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:51,670 INFO L225 Difference]: With dead ends: 77 [2020-12-22 03:52:51,670 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 03:52:51,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 03:52:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 03:52:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 35. [2020-12-22 03:52:51,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 03:52:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-12-22 03:52:51,681 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2020-12-22 03:52:51,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:51,681 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-12-22 03:52:51,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 03:52:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-12-22 03:52:51,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 03:52:51,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:51,683 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:51,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 03:52:51,899 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:51,900 INFO L82 PathProgramCache]: Analyzing trace with hash -949600503, now seen corresponding path program 1 times [2020-12-22 03:52:51,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:51,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599842442] [2020-12-22 03:52:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:52,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599842442] [2020-12-22 03:52:52,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002491966] [2020-12-22 03:52:52,105 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 [2020-12-22 03:52:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:52,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 03:52:52,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:52,558 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-12-22 03:52:52,561 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:52:52,565 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:52:52,569 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:52:52,569 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:5 [2020-12-22 03:52:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:52,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:52,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2020-12-22 03:52:52,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056607433] [2020-12-22 03:52:52,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 03:52:52,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:52,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 03:52:52,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:52:52,595 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 23 states. [2020-12-22 03:52:54,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:54,229 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-12-22 03:52:54,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 03:52:54,233 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2020-12-22 03:52:54,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:54,235 INFO L225 Difference]: With dead ends: 81 [2020-12-22 03:52:54,235 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 03:52:54,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=352, Invalid=1454, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 03:52:54,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 03:52:54,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 28. [2020-12-22 03:52:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 03:52:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 03:52:54,258 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-12-22 03:52:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:54,259 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 03:52:54,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 03:52:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 03:52:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 03:52:54,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:54,260 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:54,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:54,475 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:54,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1048225454, now seen corresponding path program 2 times [2020-12-22 03:52:54,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:54,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906137783] [2020-12-22 03:52:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:54,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906137783] [2020-12-22 03:52:54,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868596062] [2020-12-22 03:52:54,771 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 [2020-12-22 03:52:54,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:52:54,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:54,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 03:52:54,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:55,324 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-12-22 03:52:55,327 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:52:55,332 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:52:55,333 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:52:55,334 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:5 [2020-12-22 03:52:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:55,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:55,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2020-12-22 03:52:55,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443851694] [2020-12-22 03:52:55,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 03:52:55,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:55,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 03:52:55,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-12-22 03:52:55,343 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 25 states. [2020-12-22 03:52:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:57,347 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-12-22 03:52:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 03:52:57,348 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2020-12-22 03:52:57,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:57,349 INFO L225 Difference]: With dead ends: 85 [2020-12-22 03:52:57,349 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 03:52:57,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=473, Invalid=1879, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 03:52:57,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 03:52:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 37. [2020-12-22 03:52:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 03:52:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-22 03:52:57,359 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 24 [2020-12-22 03:52:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:57,360 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-22 03:52:57,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 03:52:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-22 03:52:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 03:52:57,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:57,361 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:57,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:57,575 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:57,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:57,576 INFO L82 PathProgramCache]: Analyzing trace with hash -523217426, now seen corresponding path program 2 times [2020-12-22 03:52:57,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:57,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724953717] [2020-12-22 03:52:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:57,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724953717] [2020-12-22 03:52:57,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854972750] [2020-12-22 03:52:57,836 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 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 [2020-12-22 03:52:57,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:52:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:57,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 03:52:57,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:58,261 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-12-22 03:52:58,263 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:52:58,267 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:52:58,269 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:52:58,270 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:5 [2020-12-22 03:52:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:58,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:58,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2020-12-22 03:52:58,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165398040] [2020-12-22 03:52:58,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 03:52:58,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:58,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 03:52:58,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-12-22 03:52:58,278 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 25 states. [2020-12-22 03:53:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:00,190 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-12-22 03:53:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 03:53:00,190 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2020-12-22 03:53:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:00,194 INFO L225 Difference]: With dead ends: 89 [2020-12-22 03:53:00,195 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 03:53:00,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=476, Invalid=1876, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 03:53:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 03:53:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 30. [2020-12-22 03:53:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 03:53:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-22 03:53:00,214 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2020-12-22 03:53:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:00,214 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-22 03:53:00,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 03:53:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-22 03:53:00,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 03:53:00,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:00,219 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:00,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:00,421 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:00,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:00,421 INFO L82 PathProgramCache]: Analyzing trace with hash -462854061, now seen corresponding path program 3 times [2020-12-22 03:53:00,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:00,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275369520] [2020-12-22 03:53:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:00,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275369520] [2020-12-22 03:53:00,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302817317] [2020-12-22 03:53:00,687 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 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 [2020-12-22 03:53:00,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 03:53:00,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:53:00,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 03:53:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:01,188 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 03:53:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 03:53:01,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:01,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2020-12-22 03:53:01,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27118205] [2020-12-22 03:53:01,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 03:53:01,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:01,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 03:53:01,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2020-12-22 03:53:01,284 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 28 states. [2020-12-22 03:53:04,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:04,152 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2020-12-22 03:53:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 03:53:04,152 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 26 [2020-12-22 03:53:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:04,153 INFO L225 Difference]: With dead ends: 89 [2020-12-22 03:53:04,153 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 03:53:04,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=681, Invalid=2741, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 03:53:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 03:53:04,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 27. [2020-12-22 03:53:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 03:53:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-22 03:53:04,162 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2020-12-22 03:53:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:04,163 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-22 03:53:04,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 03:53:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-22 03:53:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 03:53:04,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:04,164 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:04,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 03:53:04,378 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:04,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1209026451, now seen corresponding path program 3 times [2020-12-22 03:53:04,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:04,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803350641] [2020-12-22 03:53:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:04,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803350641] [2020-12-22 03:53:04,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868338001] [2020-12-22 03:53:04,718 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 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 [2020-12-22 03:53:04,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 03:53:04,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:53:04,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 03:53:04,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:05,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 03:53:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 03:53:05,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:05,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 30 [2020-12-22 03:53:05,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614401339] [2020-12-22 03:53:05,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 03:53:05,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:05,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 03:53:05,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-12-22 03:53:05,474 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 30 states. [2020-12-22 03:53:09,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:09,174 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-12-22 03:53:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 03:53:09,175 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 26 [2020-12-22 03:53:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:09,175 INFO L225 Difference]: With dead ends: 49 [2020-12-22 03:53:09,176 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 03:53:09,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=866, Invalid=3690, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 03:53:09,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 03:53:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 03:53:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 03:53:09,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 03:53:09,178 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-12-22 03:53:09,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:09,179 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 03:53:09,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 03:53:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 03:53:09,179 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 03:53:09,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:09,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 03:53:10,232 WARN L197 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 164 [2020-12-22 03:53:10,361 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2020-12-22 03:53:10,472 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-12-22 03:53:11,465 WARN L197 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 39 [2020-12-22 03:53:11,651 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2020-12-22 03:53:11,949 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-12-22 03:53:12,357 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2020-12-22 03:53:12,362 INFO L185 CegarLoopUtils]: At program point L44(lines 33 52) the Hoare annotation is: false [2020-12-22 03:53:12,363 INFO L189 CegarLoopUtils]: For program point L40-1(lines 40 42) no Hoare annotation was computed. [2020-12-22 03:53:12,363 INFO L185 CegarLoopUtils]: At program point L40-3(lines 40 42) the Hoare annotation is: (let ((.cse0 (= |~#d2~0.offset| 0)) (.cse1 (not (= |~#d1~0.base| |~#d2~0.base|))) (.cse2 (= ULTIMATE.start_main_~pd1~0.base ULTIMATE.start_main_~pd2~0.base)) (.cse3 (= ULTIMATE.start_main_~pd2~0.base ULTIMATE.start_main_~pa~0.base)) (.cse4 (= |~#d1~0.offset| 0)) (.cse5 (= ULTIMATE.start_main_~pd2~0.offset 0)) (.cse6 (< ULTIMATE.start_main_~i~0 (+ (select (select |#memory_int| ULTIMATE.start_main_~pa~0.base) ULTIMATE.start_main_~pa~0.offset) 1)))) (or (and .cse0 .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~pd1~0.base |~#d2~0.base|) .cse4 (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse5 .cse6 (= ULTIMATE.start_main_~pa~0.offset ULTIMATE.start_main_~pd2~0.offset) (not (= ULTIMATE.start_main_~pd1~0.base 0))) (and .cse0 .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|) (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse4 .cse5 .cse6 (= ULTIMATE.start_main_~pa~0.offset 0)))) [2020-12-22 03:53:12,363 INFO L189 CegarLoopUtils]: For program point L40-4(lines 40 42) no Hoare annotation was computed. [2020-12-22 03:53:12,363 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 03:53:12,364 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 03:53:12,365 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 03:53:12,365 INFO L189 CegarLoopUtils]: For program point L24(line 24) no Hoare annotation was computed. [2020-12-22 03:53:12,365 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 50) no Hoare annotation was computed. [2020-12-22 03:53:12,365 INFO L189 CegarLoopUtils]: For program point L24-2(line 24) no Hoare annotation was computed. [2020-12-22 03:53:12,365 INFO L185 CegarLoopUtils]: At program point L24-3(lines 22 25) the Hoare annotation is: (let ((.cse0 (= |~#d1~0.base| |ULTIMATE.start_get_dummy_#res.base|)) (.cse1 (= |~#d1~0.offset| 0))) (or (and (= |~#d2~0.offset| 0) (not (= |~#d1~0.base| |~#d2~0.base|)) .cse0 (= |~#d1~0.offset| |ULTIMATE.start_get_dummy_#res.offset|) .cse1) (and (= |ULTIMATE.start_get_dummy_#res.offset| 0) (not .cse0) (= |~#d2~0.offset| |ULTIMATE.start_get_dummy_#res.offset|) (= |ULTIMATE.start_get_dummy_#res.base| |~#d2~0.base|) .cse1))) [2020-12-22 03:53:12,366 INFO L189 CegarLoopUtils]: For program point L24-4(line 24) no Hoare annotation was computed. [2020-12-22 03:53:12,366 INFO L189 CegarLoopUtils]: For program point L24-6(line 24) no Hoare annotation was computed. [2020-12-22 03:53:12,366 INFO L185 CegarLoopUtils]: At program point L24-7(lines 22 25) the Hoare annotation is: (let ((.cse0 (not (= |~#d1~0.base| |~#d2~0.base|)))) (or (and (= |ULTIMATE.start_get_dummy_#res.offset| 0) (or (and (not (= |~#d1~0.base| |ULTIMATE.start_get_dummy_#res.base|)) (= |~#d2~0.offset| |ULTIMATE.start_get_dummy_#res.offset|) (= |ULTIMATE.start_get_dummy_#res.base| |~#d2~0.base|)) (and .cse0 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|) (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset))) (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset) (= |~#d1~0.offset| 0)) (and .cse0 (not (= ULTIMATE.start_main_~pd1~0.base |ULTIMATE.start_get_dummy_#res.base|))))) [2020-12-22 03:53:12,366 INFO L189 CegarLoopUtils]: For program point L24-8(line 24) no Hoare annotation was computed. [2020-12-22 03:53:12,366 INFO L189 CegarLoopUtils]: For program point L24-10(line 24) no Hoare annotation was computed. [2020-12-22 03:53:12,367 INFO L185 CegarLoopUtils]: At program point L24-11(lines 22 25) the Hoare annotation is: (let ((.cse2 (not (= |~#d1~0.base| |~#d2~0.base|)))) (or (and (let ((.cse1 (= ULTIMATE.start_main_~pd2~0.offset ULTIMATE.start_main_~pd1~0.offset)) (.cse0 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|))) (or (and (not .cse0) (= ULTIMATE.start_main_~pd1~0.offset 0) .cse1 (= ULTIMATE.start_main_~pd1~0.base |~#d2~0.base|) (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset)) (and (= |~#d2~0.offset| 0) .cse2 .cse1 .cse0 (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset)))) (= |~#d1~0.offset| 0)) (and .cse2 (not (= ULTIMATE.start_main_~pd1~0.base ULTIMATE.start_main_~pd2~0.base))))) [2020-12-22 03:53:12,367 INFO L189 CegarLoopUtils]: For program point L37(line 37) no Hoare annotation was computed. [2020-12-22 03:53:12,367 INFO L189 CegarLoopUtils]: For program point L37-2(lines 37 46) no Hoare annotation was computed. [2020-12-22 03:53:12,367 INFO L189 CegarLoopUtils]: For program point L37-4(lines 37 46) no Hoare annotation was computed. [2020-12-22 03:53:12,368 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 03:53:12,368 INFO L185 CegarLoopUtils]: At program point L29(lines 27 30) the Hoare annotation is: (let ((.cse3 (= |~#d2~0.offset| 0)) (.cse0 (not (= |~#d1~0.base| |~#d2~0.base|))) (.cse1 (= |ULTIMATE.start_check_#res| 1)) (.cse5 (= ULTIMATE.start_main_~pd1~0.base ULTIMATE.start_main_~pd2~0.base)) (.cse6 (= ULTIMATE.start_main_~pd2~0.base ULTIMATE.start_main_~pa~0.base)) (.cse2 (= |~#d1~0.offset| 0)) (.cse7 (= ULTIMATE.start_main_~pd2~0.offset 0)) (.cse8 (select |#memory_int| ULTIMATE.start_main_~pd2~0.base))) (or (let ((.cse4 (select .cse8 ULTIMATE.start_main_~pd2~0.offset))) (and .cse0 .cse1 (= ULTIMATE.start_main_~pd1~0.base |~#d2~0.base|) .cse2 .cse3 (<= .cse4 ULTIMATE.start_main_~i~0) (< ULTIMATE.start_main_~i~0 (+ .cse4 1)) .cse5 .cse6 (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse7 (= ULTIMATE.start_main_~pa~0.offset ULTIMATE.start_main_~pd2~0.offset) (not (= ULTIMATE.start_main_~pd1~0.base 0)))) (and .cse3 .cse0 .cse1 .cse5 .cse6 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|) (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse2 .cse7 (<= (select .cse8 0) ULTIMATE.start_main_~i~0) (< ULTIMATE.start_main_~i~0 (+ (select (select |#memory_int| ULTIMATE.start_main_~pa~0.base) ULTIMATE.start_main_~pa~0.offset) 1)) (= ULTIMATE.start_main_~pa~0.offset 0)))) [2020-12-22 03:53:12,368 INFO L189 CegarLoopUtils]: For program point L13(lines 13 20) no Hoare annotation was computed. [2020-12-22 03:53:12,368 INFO L192 CegarLoopUtils]: At program point L51(lines 32 52) the Hoare annotation is: true [2020-12-22 03:53:12,368 INFO L189 CegarLoopUtils]: For program point L43(lines 43 45) no Hoare annotation was computed. [2020-12-22 03:53:12,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:53:12 BoogieIcfgContainer [2020-12-22 03:53:12,406 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:53:12,406 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:53:12,406 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:53:12,407 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:53:12,407 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:46" (3/4) ... [2020-12-22 03:53:12,411 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 03:53:12,423 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-22 03:53:12,423 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-22 03:53:12,424 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 03:53:12,424 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 03:53:12,457 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((d2 == 0 && !(d1 == d2)) && d1 == \result) && d1 == \result) && d1 == 0) || ((((\result == 0 && !(d1 == \result)) && d2 == \result) && \result == d2) && d1 == 0) [2020-12-22 03:53:12,457 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((\result == 0 && (((!(d1 == \result) && d2 == \result) && \result == d2) || ((!(d1 == d2) && pd1 == d1) && d1 == pd1))) && d2 == pd1) && d1 == 0) || (!(d1 == d2) && !(pd1 == \result)) [2020-12-22 03:53:12,458 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((!(d1 == d2) && \result == 1) && pd1 == d2) && d1 == 0) && d2 == 0) && unknown-#memory_int-unknown[pd2][pd2] <= i) && i < unknown-#memory_int-unknown[pd2][pd2] + 1) && pd1 == pd2) && pd2 == pa) && d2 == pd1) && pd2 == 0) && pa == pd2) && !(pd1 == 0)) || (((((((((((d2 == 0 && !(d1 == d2)) && \result == 1) && pd1 == pd2) && pd2 == pa) && pd1 == d1) && d1 == pd1) && d1 == 0) && pd2 == 0) && unknown-#memory_int-unknown[pd2][0] <= i) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == 0) [2020-12-22 03:53:12,486 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test22-1.c-witness.graphml [2020-12-22 03:53:12,486 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:53:12,487 INFO L168 Benchmark]: Toolchain (without parser) took 27425.77 ms. Allocated memory was 156.2 MB in the beginning and 339.7 MB in the end (delta: 183.5 MB). Free memory was 132.1 MB in the beginning and 252.9 MB in the end (delta: -120.8 MB). Peak memory consumption was 63.8 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:12,490 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 156.2 MB. Free memory is still 129.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:53:12,491 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.02 ms. Allocated memory is still 156.2 MB. Free memory was 131.9 MB in the beginning and 121.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:12,491 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.62 ms. Allocated memory is still 156.2 MB. Free memory was 121.9 MB in the beginning and 120.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:12,492 INFO L168 Benchmark]: Boogie Preprocessor took 42.70 ms. Allocated memory is still 156.2 MB. Free memory was 120.2 MB in the beginning and 118.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:12,492 INFO L168 Benchmark]: RCFGBuilder took 679.14 ms. Allocated memory is still 156.2 MB. Free memory was 118.8 MB in the beginning and 133.4 MB in the end (delta: -14.6 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:12,496 INFO L168 Benchmark]: TraceAbstraction took 26297.57 ms. Allocated memory was 156.2 MB in the beginning and 339.7 MB in the end (delta: 183.5 MB). Free memory was 132.9 MB in the beginning and 257.1 MB in the end (delta: -124.2 MB). Peak memory consumption was 198.9 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:12,497 INFO L168 Benchmark]: Witness Printer took 80.04 ms. Allocated memory is still 339.7 MB. Free memory was 256.6 MB in the beginning and 252.9 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:12,502 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 156.2 MB. Free memory is still 129.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 271.02 ms. Allocated memory is still 156.2 MB. Free memory was 131.9 MB in the beginning and 121.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.62 ms. Allocated memory is still 156.2 MB. Free memory was 121.9 MB in the beginning and 120.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.70 ms. Allocated memory is still 156.2 MB. Free memory was 120.2 MB in the beginning and 118.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 679.14 ms. Allocated memory is still 156.2 MB. Free memory was 118.8 MB in the beginning and 133.4 MB in the end (delta: -14.6 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 26297.57 ms. Allocated memory was 156.2 MB in the beginning and 339.7 MB in the end (delta: 183.5 MB). Free memory was 132.9 MB in the beginning and 257.1 MB in the end (delta: -124.2 MB). Peak memory consumption was 198.9 MB. Max. memory is 8.0 GB. * Witness Printer took 80.04 ms. Allocated memory is still 339.7 MB. Free memory was 256.6 MB in the beginning and 252.9 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((d2 == 0 && !(d1 == d2)) && d1 == \result) && d1 == \result) && d1 == 0) || ((((\result == 0 && !(d1 == \result)) && d2 == \result) && \result == d2) && d1 == 0) - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((d2 == 0 && !(d1 == d2)) && pd1 == pd2) && pd2 == pa) && pd1 == d2) && d1 == 0) && d2 == pd1) && pd2 == 0) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == pd2) && !(pd1 == 0)) || (((((((((d2 == 0 && !(d1 == d2)) && pd1 == pd2) && pd2 == pa) && pd1 == d1) && d1 == pd1) && d1 == 0) && pd2 == 0) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == 0) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((\result == 0 && (((!(d1 == \result) && d2 == \result) && \result == d2) || ((!(d1 == d2) && pd1 == d1) && d1 == pd1))) && d2 == pd1) && d1 == 0) || (!(d1 == d2) && !(pd1 == \result)) - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((((!(pd1 == d1) && pd1 == 0) && pd2 == pd1) && pd1 == d2) && d2 == pd1) || ((((d2 == 0 && !(d1 == d2)) && pd2 == pd1) && pd1 == d1) && d1 == pd1)) && d1 == 0) || (!(d1 == d2) && !(pd1 == pd2)) - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((!(d1 == d2) && \result == 1) && pd1 == d2) && d1 == 0) && d2 == 0) && unknown-#memory_int-unknown[pd2][pd2] <= i) && i < unknown-#memory_int-unknown[pd2][pd2] + 1) && pd1 == pd2) && pd2 == pa) && d2 == pd1) && pd2 == 0) && pa == pd2) && !(pd1 == 0)) || (((((((((((d2 == 0 && !(d1 == d2)) && \result == 1) && pd1 == pd2) && pd2 == pa) && pd1 == d1) && d1 == pd1) && d1 == 0) && pd2 == 0) && unknown-#memory_int-unknown[pd2][0] <= i) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == 0) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.2s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 15.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 266 SDtfs, 1243 SDslu, 2050 SDs, 0 SdLazy, 3408 SolverSat, 443 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 468 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 379 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 15.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=8, 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, 11 MinimizatonAttempts, 363 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 43 NumberOfFragments, 311 HoareAnnotationTreeSize, 7 FomulaSimplifications, 7109977 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 239354 FormulaSimplificationTreeSizeReductionInter, 1.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 387 NumberOfCodeBlocks, 383 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 370 ConstructedInterpolants, 0 QuantifiedInterpolants, 54982 SizeOfPredicates, 69 NumberOfNonLiveVariables, 896 ConjunctsInSsa, 232 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 18/80 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...