/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:44:58,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:44:58,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:44:58,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:44:58,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:44:58,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:44:58,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:44:58,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:44:58,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:44:58,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:44:58,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:44:59,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-11-06 22:44:59,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:44:59,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:44:59,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:44:59,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:44:59,131 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:44:59,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:44:59,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:44:59,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:44:59,133 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:44:59,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:44:59,134 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:44:59,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:44:59,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:44:59,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:44:59,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:44:59,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:44:59,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:44:59,135 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:44:59,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:44:59,136 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:44:59,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:44:59,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:44:59,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:44:59,137 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:44:59,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:44:59,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:44:59,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:44:59,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:44:59,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:44:59,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:44:59,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:44:59,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:44:59,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:44:59,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:44:59,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:44:59,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:44:59,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:44:59,552 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:44:59,553 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:44:59,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-11-06 22:44:59,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3792d7626/67fe42b062254753a5cf7fed2abf0815/FLAG0e138c561 [2020-11-06 22:45:00,268 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:45:00,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2020-11-06 22:45:00,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3792d7626/67fe42b062254753a5cf7fed2abf0815/FLAG0e138c561 [2020-11-06 22:45:00,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3792d7626/67fe42b062254753a5cf7fed2abf0815 [2020-11-06 22:45:00,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:45:00,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:45:00,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:00,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:45:00,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:45:00,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:00" (1/1) ... [2020-11-06 22:45:00,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@579224ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:00, skipping insertion in model container [2020-11-06 22:45:00,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:00" (1/1) ... [2020-11-06 22:45:00,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:45:00,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:45:00,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:00,883 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:45:00,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:00,984 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:45:00,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:00 WrapperNode [2020-11-06 22:45:00,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:00,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:45:00,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:45:00,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:45:01,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:00" (1/1) ... [2020-11-06 22:45:01,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:00" (1/1) ... [2020-11-06 22:45:01,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:00" (1/1) ... [2020-11-06 22:45:01,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:00" (1/1) ... [2020-11-06 22:45:01,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:00" (1/1) ... [2020-11-06 22:45:01,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:00" (1/1) ... [2020-11-06 22:45:01,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:00" (1/1) ... [2020-11-06 22:45:01,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:45:01,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:45:01,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:45:01,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:45:01,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:01,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:45:01,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:45:01,167 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:45:01,167 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:45:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:45:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:45:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:45:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:45:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:45:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:45:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:45:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:45:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:45:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-11-06 22:45:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:45:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:45:01,658 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:45:01,659 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-06 22:45:01,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:01 BoogieIcfgContainer [2020-11-06 22:45:01,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:45:01,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:45:01,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:45:01,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:45:01,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:00" (1/3) ... [2020-11-06 22:45:01,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c788ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:01, skipping insertion in model container [2020-11-06 22:45:01,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:00" (2/3) ... [2020-11-06 22:45:01,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c788ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:01, skipping insertion in model container [2020-11-06 22:45:01,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:01" (3/3) ... [2020-11-06 22:45:01,671 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-11-06 22:45:01,691 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:45:01,695 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:45:01,709 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:45:01,742 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:45:01,742 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:45:01,742 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:45:01,742 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:45:01,743 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:45:01,743 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:45:01,743 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:45:01,743 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:45:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-11-06 22:45:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-06 22:45:01,771 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:01,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:01,772 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:01,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:01,780 INFO L82 PathProgramCache]: Analyzing trace with hash 910173467, now seen corresponding path program 1 times [2020-11-06 22:45:01,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:01,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093509846] [2020-11-06 22:45:01,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:02,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:02,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093509846] [2020-11-06 22:45:02,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:02,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:45:02,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870948088] [2020-11-06 22:45:02,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:45:02,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:02,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:45:02,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:02,198 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-11-06 22:45:02,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:02,346 INFO L93 Difference]: Finished difference Result 46 states and 67 transitions. [2020-11-06 22:45:02,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:45:02,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-11-06 22:45:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:02,362 INFO L225 Difference]: With dead ends: 46 [2020-11-06 22:45:02,362 INFO L226 Difference]: Without dead ends: 23 [2020-11-06 22:45:02,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-06 22:45:02,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2020-11-06 22:45:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-06 22:45:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-06 22:45:02,424 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-11-06 22:45:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:02,425 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-06 22:45:02,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:45:02,426 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-11-06 22:45:02,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-06 22:45:02,427 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:02,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:02,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:45:02,428 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:02,429 INFO L82 PathProgramCache]: Analyzing trace with hash 909279737, now seen corresponding path program 1 times [2020-11-06 22:45:02,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:02,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877525432] [2020-11-06 22:45:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:02,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:02,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877525432] [2020-11-06 22:45:02,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:02,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:45:02,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172314010] [2020-11-06 22:45:02,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:45:02,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:02,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:45:02,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:45:02,597 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-11-06 22:45:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:02,755 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-11-06 22:45:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:45:02,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-06 22:45:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:02,757 INFO L225 Difference]: With dead ends: 37 [2020-11-06 22:45:02,757 INFO L226 Difference]: Without dead ends: 33 [2020-11-06 22:45:02,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:45:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-06 22:45:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 17. [2020-11-06 22:45:02,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-06 22:45:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-06 22:45:02,770 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-11-06 22:45:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:02,770 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-06 22:45:02,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:45:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-06 22:45:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:45:02,771 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:02,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:02,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:45:02,772 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:02,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:02,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1010247195, now seen corresponding path program 1 times [2020-11-06 22:45:02,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:02,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052612719] [2020-11-06 22:45:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:02,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:02,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052612719] [2020-11-06 22:45:02,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:02,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:45:02,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733801677] [2020-11-06 22:45:02,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:45:02,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:02,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:45:02,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:45:02,918 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-11-06 22:45:03,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:03,047 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-11-06 22:45:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:45:03,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-06 22:45:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:03,048 INFO L225 Difference]: With dead ends: 41 [2020-11-06 22:45:03,049 INFO L226 Difference]: Without dead ends: 31 [2020-11-06 22:45:03,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:45:03,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-06 22:45:03,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 18. [2020-11-06 22:45:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-06 22:45:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-06 22:45:03,057 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-11-06 22:45:03,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:03,057 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-06 22:45:03,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:45:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-06 22:45:03,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:45:03,058 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:03,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:03,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:45:03,059 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:03,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:03,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1746096605, now seen corresponding path program 1 times [2020-11-06 22:45:03,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:03,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447850979] [2020-11-06 22:45:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:03,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:03,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447850979] [2020-11-06 22:45:03,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:03,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:45:03,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545033089] [2020-11-06 22:45:03,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:45:03,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:03,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:45:03,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:45:03,171 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-11-06 22:45:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:03,270 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-11-06 22:45:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:45:03,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-11-06 22:45:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:03,272 INFO L225 Difference]: With dead ends: 33 [2020-11-06 22:45:03,272 INFO L226 Difference]: Without dead ends: 22 [2020-11-06 22:45:03,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:45:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-06 22:45:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-11-06 22:45:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-06 22:45:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-11-06 22:45:03,279 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-11-06 22:45:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:03,280 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-11-06 22:45:03,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:45:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-11-06 22:45:03,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-06 22:45:03,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:03,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:03,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:45:03,281 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:03,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1061756513, now seen corresponding path program 1 times [2020-11-06 22:45:03,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:03,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118114944] [2020-11-06 22:45:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:03,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:03,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118114944] [2020-11-06 22:45:03,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047189730] [2020-11-06 22:45:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:03,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:45:03,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:03,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:03,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-06 22:45:03,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306147473] [2020-11-06 22:45:03,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:45:03,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:03,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:45:03,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:45:03,548 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-11-06 22:45:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:03,665 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-11-06 22:45:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:45:03,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-11-06 22:45:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:03,666 INFO L225 Difference]: With dead ends: 36 [2020-11-06 22:45:03,667 INFO L226 Difference]: Without dead ends: 24 [2020-11-06 22:45:03,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:45:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-06 22:45:03,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-11-06 22:45:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-06 22:45:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-06 22:45:03,674 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-11-06 22:45:03,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:03,675 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-06 22:45:03,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:45:03,675 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-06 22:45:03,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-06 22:45:03,676 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:03,676 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:03,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:03,891 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:03,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:03,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2125826273, now seen corresponding path program 2 times [2020-11-06 22:45:03,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:03,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837464360] [2020-11-06 22:45:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:04,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:04,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837464360] [2020-11-06 22:45:04,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418082989] [2020-11-06 22:45:04,032 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:04,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-06 22:45:04,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:04,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:45:04,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 22:45:04,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:45:04,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-11-06 22:45:04,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330216973] [2020-11-06 22:45:04,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:45:04,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:04,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:45:04,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:45:04,119 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 3 states. [2020-11-06 22:45:04,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:04,123 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-11-06 22:45:04,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:45:04,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-06 22:45:04,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:04,124 INFO L225 Difference]: With dead ends: 21 [2020-11-06 22:45:04,124 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:45:04,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:45:04,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:45:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:45:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:45:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:45:04,125 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-11-06 22:45:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:04,126 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:45:04,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:45:04,126 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:45:04,126 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:45:04,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:04,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:45:04,442 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:45:04,442 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:45:04,442 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:45:04,443 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:45:04,443 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:45:04,443 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#memory_int| |old(#memory_int)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |old(#valid)| |#valid|) (= |#t~string5.base| |old(#t~string5.base)|) (= |~#array~0.base| |old(~#array~0.base)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |~#array~0.offset| |old(~#array~0.offset)|)) [2020-11-06 22:45:04,443 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:45:04,443 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:45:04,444 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:45:04,444 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:45:04,444 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:45:04,444 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 7 23) no Hoare annotation was computed. [2020-11-06 22:45:04,444 INFO L266 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-11-06 22:45:04,444 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 7 23) no Hoare annotation was computed. [2020-11-06 22:45:04,444 INFO L266 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-11-06 22:45:04,445 INFO L262 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (= main_~a~0 1) [2020-11-06 22:45:04,445 INFO L262 CegarLoopResult]: At program point mainENTRY(lines 7 23) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-11-06 22:45:04,445 INFO L262 CegarLoopResult]: At program point L18(lines 8 23) the Hoare annotation is: false [2020-11-06 22:45:04,445 INFO L266 CegarLoopResult]: For program point L14-2(lines 14 15) no Hoare annotation was computed. [2020-11-06 22:45:04,445 INFO L262 CegarLoopResult]: At program point L14-3(lines 14 15) the Hoare annotation is: (= main_~a~0 1) [2020-11-06 22:45:04,445 INFO L266 CegarLoopResult]: For program point L12-2(lines 12 15) no Hoare annotation was computed. [2020-11-06 22:45:04,446 INFO L262 CegarLoopResult]: At program point L12-3(lines 12 15) the Hoare annotation is: (= main_~a~0 1) [2020-11-06 22:45:04,446 INFO L266 CegarLoopResult]: For program point L12-4(lines 8 23) no Hoare annotation was computed. [2020-11-06 22:45:04,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:04 BoogieIcfgContainer [2020-11-06 22:45:04,465 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:04,468 INFO L168 Benchmark]: Toolchain (without parser) took 3881.12 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 132.6 MB in the beginning and 102.7 MB in the end (delta: 29.9 MB). Peak memory consumption was 63.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:04,469 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:04,470 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.82 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 129.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:04,471 INFO L168 Benchmark]: Boogie Preprocessor took 94.75 ms. Allocated memory is still 151.0 MB. Free memory was 129.9 MB in the beginning and 134.3 MB in the end (delta: -4.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:04,472 INFO L168 Benchmark]: RCFGBuilder took 578.39 ms. Allocated memory is still 151.0 MB. Free memory was 134.3 MB in the beginning and 119.1 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:04,474 INFO L168 Benchmark]: TraceAbstraction took 2803.13 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 119.1 MB in the beginning and 102.7 MB in the end (delta: 16.4 MB). Peak memory consumption was 51.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:04,478 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 392.82 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 129.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 94.75 ms. Allocated memory is still 151.0 MB. Free memory was 129.9 MB in the beginning and 134.3 MB in the end (delta: -4.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 578.39 ms. Allocated memory is still 151.0 MB. Free memory was 134.3 MB in the beginning and 119.1 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2803.13 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 119.1 MB in the beginning and 102.7 MB in the end (delta: 16.4 MB). Peak memory consumption was 51.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: a == 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.6s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 68 SDslu, 58 SDs, 0 SdLazy, 126 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, 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, 6 MinimizatonAttempts, 42 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 14 PreInvPairs, 21 NumberOfFragments, 56 HoareAnnotationTreeSize, 14 FomulaSimplifications, 514 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 37 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 125 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 117 ConstructedInterpolants, 0 QuantifiedInterpolants, 6352 SizeOfPredicates, 2 NumberOfNonLiveVariables, 238 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 15/21 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...