/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/loop-acceleration/diamond_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:49:53,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:49:53,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:49:53,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-23 06:49:53,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:49:53,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:49:53,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:49:53,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:49:53,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:49:53,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:49:53,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:49:53,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:49:53,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:49:53,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:49:53,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:49:53,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:49:53,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:49:54,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:49:54,051 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:49:54,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:49:54,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:49:54,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:49:54,058 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:49:54,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:49:54,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:49:54,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:49:54,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:49:54,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:49:54,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:49:54,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:49:54,061 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:49:54,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:49:54,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:49:54,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:49:54,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:49:54,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:49:54,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:49:54,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:49:54,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:49:54,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:49:54,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:49:54,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:49:54,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:49:54,064 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:49:54,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:49:54,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:49:54,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:49:54,563 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:49:54,563 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:49:54,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/diamond_2-2.c [2020-12-23 06:49:54,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ed1f004a8/9e9b549f868548a9b81f22e763ed1dfb/FLAG736d15ba0 [2020-12-23 06:49:55,246 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:49:55,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_2-2.c [2020-12-23 06:49:55,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ed1f004a8/9e9b549f868548a9b81f22e763ed1dfb/FLAG736d15ba0 [2020-12-23 06:49:55,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ed1f004a8/9e9b549f868548a9b81f22e763ed1dfb [2020-12-23 06:49:55,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:49:55,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:49:55,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:49:55,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:49:55,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:49:55,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:49:55" (1/1) ... [2020-12-23 06:49:55,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd005c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:49:55, skipping insertion in model container [2020-12-23 06:49:55,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:49:55" (1/1) ... [2020-12-23 06:49:55,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:49:55,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:49:55,453 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_2-2.c[373,386] [2020-12-23 06:49:55,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:49:55,485 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:49:55,499 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_2-2.c[373,386] [2020-12-23 06:49:55,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:49:55,526 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:49:55,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:49:55 WrapperNode [2020-12-23 06:49:55,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:49:55,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:49:55,528 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:49:55,528 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:49:55,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:49:55" (1/1) ... [2020-12-23 06:49:55,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:49:55" (1/1) ... [2020-12-23 06:49:55,569 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:49:55,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:49:55,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:49:55,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:49:55,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:49:55" (1/1) ... [2020-12-23 06:49:55,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:49:55" (1/1) ... [2020-12-23 06:49:55,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:49:55" (1/1) ... [2020-12-23 06:49:55,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:49:55" (1/1) ... [2020-12-23 06:49:55,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:49:55" (1/1) ... [2020-12-23 06:49:55,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:49:55" (1/1) ... [2020-12-23 06:49:55,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:49:55" (1/1) ... [2020-12-23 06:49:55,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:49:55,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:49:55,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:49:55,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:49:55,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:49:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:49:55,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:49:55,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:49:55,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:49:55,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:49:56,283 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:49:56,283 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:49:56,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:49:56 BoogieIcfgContainer [2020-12-23 06:49:56,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:49:56,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:49:56,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:49:56,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:49:56,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:49:55" (1/3) ... [2020-12-23 06:49:56,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b35bd72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:49:56, skipping insertion in model container [2020-12-23 06:49:56,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:49:55" (2/3) ... [2020-12-23 06:49:56,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b35bd72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:49:56, skipping insertion in model container [2020-12-23 06:49:56,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:49:56" (3/3) ... [2020-12-23 06:49:56,294 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-2.c [2020-12-23 06:49:56,301 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:49:56,306 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:49:56,327 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:49:56,355 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:49:56,356 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:49:56,356 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:49:56,356 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:49:56,356 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:49:56,357 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:49:56,357 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:49:56,357 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:49:56,372 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 06:49:56,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:49:56,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:49:56,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:49:56,379 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:49:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:49:56,385 INFO L82 PathProgramCache]: Analyzing trace with hash 891600039, now seen corresponding path program 1 times [2020-12-23 06:49:56,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:49:56,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130442641] [2020-12-23 06:49:56,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:49:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:49:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:49:56,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130442641] [2020-12-23 06:49:56,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:49:56,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:49:56,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945392035] [2020-12-23 06:49:56,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:49:56,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:49:56,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:49:56,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:49:56,611 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-23 06:49:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:49:56,630 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2020-12-23 06:49:56,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:49:56,632 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 06:49:56,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:49:56,650 INFO L225 Difference]: With dead ends: 27 [2020-12-23 06:49:56,651 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 06:49:56,660 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 [2020-12-23 06:49:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 06:49:56,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 06:49:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:49:56,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2020-12-23 06:49:56,693 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 6 [2020-12-23 06:49:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:49:56,694 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2020-12-23 06:49:56,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:49:56,694 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2020-12-23 06:49:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:49:56,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:49:56,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:49:56,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:49:56,695 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:49:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:49:56,696 INFO L82 PathProgramCache]: Analyzing trace with hash 889693415, now seen corresponding path program 1 times [2020-12-23 06:49:56,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:49:56,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538379167] [2020-12-23 06:49:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:49:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:49:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:49:56,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538379167] [2020-12-23 06:49:56,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:49:56,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:49:56,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344673012] [2020-12-23 06:49:56,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:49:56,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:49:56,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:49:56,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:49:56,782 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand 3 states. [2020-12-23 06:49:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:49:56,882 INFO L93 Difference]: Finished difference Result 23 states and 34 transitions. [2020-12-23 06:49:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:49:56,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:49:56,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:49:56,885 INFO L225 Difference]: With dead ends: 23 [2020-12-23 06:49:56,885 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 06:49:56,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:49:56,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 06:49:56,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-23 06:49:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:49:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 28 transitions. [2020-12-23 06:49:56,891 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 28 transitions. Word has length 6 [2020-12-23 06:49:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:49:56,892 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 28 transitions. [2020-12-23 06:49:56,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:49:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 28 transitions. [2020-12-23 06:49:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 06:49:56,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:49:56,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:49:56,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:49:56,894 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:49:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:49:56,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1797740634, now seen corresponding path program 1 times [2020-12-23 06:49:56,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:49:56,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722735136] [2020-12-23 06:49:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:49:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:49:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:49:56,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722735136] [2020-12-23 06:49:56,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:49:56,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:49:56,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668141276] [2020-12-23 06:49:56,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:49:56,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:49:56,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:49:56,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:49:56,962 INFO L87 Difference]: Start difference. First operand 18 states and 28 transitions. Second operand 3 states. [2020-12-23 06:49:57,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:49:57,121 INFO L93 Difference]: Finished difference Result 48 states and 78 transitions. [2020-12-23 06:49:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:49:57,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 06:49:57,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:49:57,123 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:49:57,123 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 06:49:57,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:49:57,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 06:49:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-12-23 06:49:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:49:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-12-23 06:49:57,131 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 17 [2020-12-23 06:49:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:49:57,131 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-12-23 06:49:57,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:49:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-12-23 06:49:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 06:49:57,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:49:57,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:49:57,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:49:57,135 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:49:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:49:57,135 INFO L82 PathProgramCache]: Analyzing trace with hash -170777494, now seen corresponding path program 1 times [2020-12-23 06:49:57,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:49:57,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850648916] [2020-12-23 06:49:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:49:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:49:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:49:57,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850648916] [2020-12-23 06:49:57,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197764319] [2020-12-23 06:49:57,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:49:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:49:57,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:49:57,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:49:57,806 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:49:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:49:57,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:49:57,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 11 [2020-12-23 06:49:57,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369503294] [2020-12-23 06:49:57,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:49:57,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:49:57,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:49:57,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:49:57,844 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 11 states. [2020-12-23 06:49:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:49:58,140 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-12-23 06:49:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:49:58,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-12-23 06:49:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:49:58,142 INFO L225 Difference]: With dead ends: 57 [2020-12-23 06:49:58,142 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:49:58,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:49:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:49:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 06:49:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 06:49:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2020-12-23 06:49:58,148 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 17 [2020-12-23 06:49:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:49:58,149 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2020-12-23 06:49:58,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:49:58,149 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2020-12-23 06:49:58,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 06:49:58,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:49:58,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:49:58,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:49:58,364 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:49:58,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:49:58,365 INFO L82 PathProgramCache]: Analyzing trace with hash -784776342, now seen corresponding path program 1 times [2020-12-23 06:49:58,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:49:58,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281949751] [2020-12-23 06:49:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:49:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:49:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:49:58,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281949751] [2020-12-23 06:49:58,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:49:58,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:49:58,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406081886] [2020-12-23 06:49:58,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:49:58,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:49:58,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:49:58,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:49:58,403 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand 3 states. [2020-12-23 06:49:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:49:58,456 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-12-23 06:49:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:49:58,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 06:49:58,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:49:58,458 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:49:58,458 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 06:49:58,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:49:58,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 06:49:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-23 06:49:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:49:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-23 06:49:58,462 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 17 [2020-12-23 06:49:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:49:58,462 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-23 06:49:58,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:49:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-23 06:49:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 06:49:58,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:49:58,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:49:58,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 06:49:58,464 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:49:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:49:58,464 INFO L82 PathProgramCache]: Analyzing trace with hash -843881686, now seen corresponding path program 1 times [2020-12-23 06:49:58,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:49:58,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674787371] [2020-12-23 06:49:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:49:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:49:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:49:58,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674787371] [2020-12-23 06:49:58,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93383673] [2020-12-23 06:49:58,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:49:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:49:58,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:49:58,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:49:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:49:58,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:49:58,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 06:49:58,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847558713] [2020-12-23 06:49:58,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:49:58,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:49:58,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:49:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:49:58,953 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2020-12-23 06:49:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:49:59,135 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-23 06:49:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:49:59,136 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-23 06:49:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:49:59,137 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:49:59,137 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:49:59,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:49:59,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:49:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-23 06:49:59,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:49:59,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-23 06:49:59,142 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 17 [2020-12-23 06:49:59,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:49:59,142 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-23 06:49:59,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:49:59,142 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-23 06:49:59,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:49:59,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:49:59,143 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:49:59,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:49:59,357 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:49:59,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:49:59,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2006766329, now seen corresponding path program 2 times [2020-12-23 06:49:59,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:49:59,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628034863] [2020-12-23 06:49:59,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:49:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:49:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:49:59,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628034863] [2020-12-23 06:49:59,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584925698] [2020-12-23 06:49:59,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:49:59,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:49:59,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:49:59,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:49:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:50:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:50:00,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:50:00,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:50:00,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138733693] [2020-12-23 06:50:00,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:50:00,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:50:00,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:50:00,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:50:00,153 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 24 states. [2020-12-23 06:50:00,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:50:00,522 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-12-23 06:50:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:50:00,524 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-12-23 06:50:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:50:00,525 INFO L225 Difference]: With dead ends: 45 [2020-12-23 06:50:00,525 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 06:50:00,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:50:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 06:50:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-23 06:50:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 06:50:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-23 06:50:00,531 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 28 [2020-12-23 06:50:00,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:50:00,531 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-23 06:50:00,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:50:00,531 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-23 06:50:00,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 06:50:00,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:50:00,533 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:50:00,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:50:00,748 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:50:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:50:00,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1182300406, now seen corresponding path program 3 times [2020-12-23 06:50:00,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:50:00,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824632234] [2020-12-23 06:50:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:50:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:50:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:50:01,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824632234] [2020-12-23 06:50:01,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981368993] [2020-12-23 06:50:01,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:50:01,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:50:01,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:50:01,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:50:01,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:50:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:50:01,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:50:01,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 06:50:01,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639968236] [2020-12-23 06:50:01,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:50:01,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:50:01,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:50:01,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:50:01,776 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 34 states. [2020-12-23 06:50:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:50:02,529 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-23 06:50:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:50:02,530 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 39 [2020-12-23 06:50:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:50:02,531 INFO L225 Difference]: With dead ends: 56 [2020-12-23 06:50:02,531 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 06:50:02,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:50:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 06:50:02,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-23 06:50:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 06:50:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-23 06:50:02,537 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 39 [2020-12-23 06:50:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:50:02,538 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-23 06:50:02,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:50:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-23 06:50:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:50:02,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:50:02,540 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:50:02,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:50:02,755 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:50:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:50:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1256465113, now seen corresponding path program 4 times [2020-12-23 06:50:02,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:50:02,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533203162] [2020-12-23 06:50:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:50:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:50:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:50:04,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533203162] [2020-12-23 06:50:04,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860002241] [2020-12-23 06:50:04,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:50:04,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:50:04,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:50:04,364 WARN L261 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-23 06:50:04,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:50:07,749 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:50:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:50:07,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:50:07,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44] total 84 [2020-12-23 06:50:07,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347709702] [2020-12-23 06:50:07,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-23 06:50:07,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:50:07,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-23 06:50:07,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=6688, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 06:50:07,850 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 84 states. [2020-12-23 06:50:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:50:09,486 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-12-23 06:50:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:50:09,486 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 50 [2020-12-23 06:50:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:50:09,487 INFO L225 Difference]: With dead ends: 67 [2020-12-23 06:50:09,487 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 06:50:09,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=284, Invalid=6688, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 06:50:09,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 06:50:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-23 06:50:09,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 06:50:09,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-12-23 06:50:09,497 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 50 [2020-12-23 06:50:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:50:09,498 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-12-23 06:50:09,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-23 06:50:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-12-23 06:50:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 06:50:09,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:50:09,500 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:50:09,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:50:09,716 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:50:09,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:50:09,716 INFO L82 PathProgramCache]: Analyzing trace with hash 28672746, now seen corresponding path program 5 times [2020-12-23 06:50:09,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:50:09,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685577931] [2020-12-23 06:50:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:50:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:50:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-23 06:50:10,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685577931] [2020-12-23 06:50:10,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748032117] [2020-12-23 06:50:10,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:50:10,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:50:10,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:50:10,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 109 conjunts are in the unsatisfiable core [2020-12-23 06:50:10,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:50:12,996 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:50:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:50:13,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:50:13,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 54] total 57 [2020-12-23 06:50:13,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832628457] [2020-12-23 06:50:13,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 06:50:13,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:50:13,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 06:50:13,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3003, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:50:13,062 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 57 states. [2020-12-23 06:50:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:50:15,841 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2020-12-23 06:50:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 06:50:15,842 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 61 [2020-12-23 06:50:15,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:50:15,842 INFO L225 Difference]: With dead ends: 75 [2020-12-23 06:50:15,842 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 06:50:15,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 11 SyntacticMatches, 48 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=256, Invalid=4574, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:50:15,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 06:50:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 06:50:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 06:50:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 06:50:15,846 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2020-12-23 06:50:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:50:15,846 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 06:50:15,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 06:50:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 06:50:15,846 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 06:50:16,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:50:16,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 06:50:16,166 INFO L189 CegarLoopUtils]: For program point L27-1(lines 17 47) no Hoare annotation was computed. [2020-12-23 06:50:16,166 INFO L189 CegarLoopUtils]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-12-23 06:50:16,167 INFO L192 CegarLoopUtils]: At program point L7-2(lines 1 50) the Hoare annotation is: true [2020-12-23 06:50:16,167 INFO L189 CegarLoopUtils]: For program point L36-1(lines 17 47) no Hoare annotation was computed. [2020-12-23 06:50:16,167 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 06:50:16,167 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 06:50:16,167 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 06:50:16,167 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-12-23 06:50:16,167 INFO L189 CegarLoopUtils]: For program point L24-1(lines 17 47) no Hoare annotation was computed. [2020-12-23 06:50:16,168 INFO L185 CegarLoopUtils]: At program point L45-1(lines 17 47) the Hoare annotation is: (let ((.cse0 (<= (mod ULTIMATE.start_main_~y~0 2) 0))) (or (and (= ULTIMATE.start_main_~x~0 80) .cse0) (and (<= 20 ULTIMATE.start_main_~x~0) .cse0 (<= ULTIMATE.start_main_~x~0 20)) (and (not (= ULTIMATE.start_main_~y~0 (* (div ULTIMATE.start_main_~y~0 2) 2))) (= (+ ULTIMATE.start_main_~x~0 5) 0)) (= ULTIMATE.start_main_~x~0 0) (and (= 40 ULTIMATE.start_main_~x~0) .cse0) (and (= ULTIMATE.start_main_~x~0 100) .cse0) (and .cse0 (= ULTIMATE.start_main_~x~0 60)))) [2020-12-23 06:50:16,168 INFO L189 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2020-12-23 06:50:16,168 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 06:50:16,168 INFO L189 CegarLoopUtils]: For program point L33-1(lines 17 47) no Hoare annotation was computed. [2020-12-23 06:50:16,168 INFO L189 CegarLoopUtils]: For program point L21-1(lines 17 47) no Hoare annotation was computed. [2020-12-23 06:50:16,168 INFO L189 CegarLoopUtils]: For program point L17-2(lines 17 47) no Hoare annotation was computed. [2020-12-23 06:50:16,168 INFO L189 CegarLoopUtils]: For program point L42-1(lines 17 47) no Hoare annotation was computed. [2020-12-23 06:50:16,168 INFO L189 CegarLoopUtils]: For program point L30-1(lines 17 47) no Hoare annotation was computed. [2020-12-23 06:50:16,169 INFO L189 CegarLoopUtils]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-12-23 06:50:16,169 INFO L189 CegarLoopUtils]: For program point L18-2(lines 17 47) no Hoare annotation was computed. [2020-12-23 06:50:16,169 INFO L189 CegarLoopUtils]: For program point L39-1(lines 17 47) no Hoare annotation was computed. [2020-12-23 06:50:16,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:50:16 BoogieIcfgContainer [2020-12-23 06:50:16,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:50:16,194 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:50:16,194 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:50:16,194 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:50:16,195 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:49:56" (3/4) ... [2020-12-23 06:50:16,199 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 06:50:16,212 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-23 06:50:16,212 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 06:50:16,212 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:50:16,213 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:50:16,261 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-acceleration/diamond_2-2.c-witness.graphml [2020-12-23 06:50:16,262 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:50:16,264 INFO L168 Benchmark]: Toolchain (without parser) took 20988.91 ms. Allocated memory was 152.0 MB in the beginning and 327.2 MB in the end (delta: 175.1 MB). Free memory was 127.7 MB in the beginning and 202.8 MB in the end (delta: -75.0 MB). Peak memory consumption was 101.3 MB. Max. memory is 8.0 GB. [2020-12-23 06:50:16,264 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:50:16,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.41 ms. Allocated memory is still 152.0 MB. Free memory was 127.5 MB in the beginning and 117.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:50:16,265 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.47 ms. Allocated memory is still 152.0 MB. Free memory was 117.7 MB in the beginning and 116.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:50:16,266 INFO L168 Benchmark]: Boogie Preprocessor took 27.41 ms. Allocated memory is still 152.0 MB. Free memory was 116.0 MB in the beginning and 114.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:50:16,267 INFO L168 Benchmark]: RCFGBuilder took 686.64 ms. Allocated memory is still 152.0 MB. Free memory was 114.8 MB in the beginning and 135.1 MB in the end (delta: -20.3 MB). Peak memory consumption was 18.8 MB. Max. memory is 8.0 GB. [2020-12-23 06:50:16,267 INFO L168 Benchmark]: TraceAbstraction took 19906.87 ms. Allocated memory was 152.0 MB in the beginning and 327.2 MB in the end (delta: 175.1 MB). Free memory was 134.8 MB in the beginning and 205.4 MB in the end (delta: -70.6 MB). Peak memory consumption was 104.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:50:16,268 INFO L168 Benchmark]: Witness Printer took 67.55 ms. Allocated memory is still 327.2 MB. Free memory was 205.4 MB in the beginning and 202.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:50:16,271 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.41 ms. Allocated memory is still 152.0 MB. Free memory was 127.5 MB in the beginning and 117.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.47 ms. Allocated memory is still 152.0 MB. Free memory was 117.7 MB in the beginning and 116.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.41 ms. Allocated memory is still 152.0 MB. Free memory was 116.0 MB in the beginning and 114.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 686.64 ms. Allocated memory is still 152.0 MB. Free memory was 114.8 MB in the beginning and 135.1 MB in the end (delta: -20.3 MB). Peak memory consumption was 18.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19906.87 ms. Allocated memory was 152.0 MB in the beginning and 327.2 MB in the end (delta: 175.1 MB). Free memory was 134.8 MB in the beginning and 205.4 MB in the end (delta: -70.6 MB). Peak memory consumption was 104.5 MB. Max. memory is 8.0 GB. * Witness Printer took 67.55 ms. Allocated memory is still 327.2 MB. Free memory was 205.4 MB in the beginning and 202.8 MB in the end (delta: 2.6 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: 8]: 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: 1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((((x == 80 && y % 2 <= 0) || ((20 <= x && y % 2 <= 0) && x <= 20)) || (!(y == y / 2 * 2) && x + 5 == 0)) || x == 0) || (40 == x && y % 2 <= 0)) || (x == 100 && y % 2 <= 0)) || (y % 2 <= 0 && x == 60) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19.6s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 119 SDtfs, 47 SDslu, 296 SDs, 0 SdLazy, 7566 SolverSat, 174 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 416 GetRequests, 129 SyntacticMatches, 58 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 9.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 10 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 10 NumberOfFragments, 67 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 63 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 470 NumberOfCodeBlocks, 464 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 454 ConstructedInterpolants, 0 QuantifiedInterpolants, 182612 SizeOfPredicates, 12 NumberOfNonLiveVariables, 870 ConjunctsInSsa, 356 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 104/474 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...