/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/product-lines/minepump_spec4_product47.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:56:43,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:56:43,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:56:43,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:56:43,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:56:43,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:56:43,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:56:43,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:56:43,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:56:43,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:56:43,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:56:43,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:56:43,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:56:43,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:56:43,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:56:43,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:56:43,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:56:43,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:56:43,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:56:43,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:56:43,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:56:43,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:56:43,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:56:43,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:56:43,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:56:43,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:56:43,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:56:43,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:56:43,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:56:43,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:56:43,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:56:43,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:56:43,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:56:43,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:56:43,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:56:43,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:56:43,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:56:43,677 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:56:43,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:56:43,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:56:43,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:56:43,679 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:56:43,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:56:43,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:56:43,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:56:43,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:56:43,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:56:43,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:56:43,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:56:43,681 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:56:43,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:56:43,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:56:43,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:56:43,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:56:43,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:56:43,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:56:43,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:56:43,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:56:43,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:56:43,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:56:43,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:56:43,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:56:43,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:56:44,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:56:44,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:56:44,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:56:44,083 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:56:44,084 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:56:44,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c [2020-12-22 06:56:44,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b4acead1/3d8cc0e1a501464d9015323cffadeb98/FLAG88f2db7f0 [2020-12-22 06:56:44,992 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:56:44,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c [2020-12-22 06:56:45,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b4acead1/3d8cc0e1a501464d9015323cffadeb98/FLAG88f2db7f0 [2020-12-22 06:56:45,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b4acead1/3d8cc0e1a501464d9015323cffadeb98 [2020-12-22 06:56:45,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:56:45,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:56:45,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:56:45,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:56:45,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:56:45,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:56:45" (1/1) ... [2020-12-22 06:56:45,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65d9aa89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:45, skipping insertion in model container [2020-12-22 06:56:45,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:56:45" (1/1) ... [2020-12-22 06:56:45,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:56:45,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:56:45,652 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c[16386,16399] [2020-12-22 06:56:45,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:56:45,679 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:56:45,757 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c[16386,16399] [2020-12-22 06:56:45,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:56:45,809 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:56:45,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:45 WrapperNode [2020-12-22 06:56:45,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:56:45,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:56:45,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:56:45,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:56:45,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:45" (1/1) ... [2020-12-22 06:56:45,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:45" (1/1) ... [2020-12-22 06:56:45,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:56:45,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:56:45,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:56:45,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:56:45,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:45" (1/1) ... [2020-12-22 06:56:45,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:45" (1/1) ... [2020-12-22 06:56:45,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:45" (1/1) ... [2020-12-22 06:56:45,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:45" (1/1) ... [2020-12-22 06:56:46,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:45" (1/1) ... [2020-12-22 06:56:46,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:45" (1/1) ... [2020-12-22 06:56:46,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:45" (1/1) ... [2020-12-22 06:56:46,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:56:46,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:56:46,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:56:46,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:56:46,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:56:46,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:56:46,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:56:46,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:56:46,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:56:47,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:56:47,276 INFO L299 CfgBuilder]: Removed 196 assume(true) statements. [2020-12-22 06:56:47,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:47 BoogieIcfgContainer [2020-12-22 06:56:47,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:56:47,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:56:47,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:56:47,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:56:47,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:56:45" (1/3) ... [2020-12-22 06:56:47,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b10d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:56:47, skipping insertion in model container [2020-12-22 06:56:47,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:45" (2/3) ... [2020-12-22 06:56:47,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b10d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:56:47, skipping insertion in model container [2020-12-22 06:56:47,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:47" (3/3) ... [2020-12-22 06:56:47,289 INFO L111 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product47.cil.c [2020-12-22 06:56:47,297 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:56:47,302 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 06:56:47,326 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 06:56:47,358 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:56:47,358 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:56:47,358 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:56:47,359 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:56:47,359 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:56:47,359 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:56:47,359 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:56:47,359 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:56:47,382 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states. [2020-12-22 06:56:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 06:56:47,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:47,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:47,391 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:47,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:47,398 INFO L82 PathProgramCache]: Analyzing trace with hash -330245923, now seen corresponding path program 1 times [2020-12-22 06:56:47,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:47,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040070527] [2020-12-22 06:56:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:56:47,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040070527] [2020-12-22 06:56:47,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:56:47,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:56:47,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414301670] [2020-12-22 06:56:47,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 06:56:47,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:56:47,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 06:56:47,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 06:56:47,805 INFO L87 Difference]: Start difference. First operand 131 states. Second operand 2 states. [2020-12-22 06:56:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:56:47,845 INFO L93 Difference]: Finished difference Result 256 states and 383 transitions. [2020-12-22 06:56:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 06:56:47,846 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-12-22 06:56:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:56:47,859 INFO L225 Difference]: With dead ends: 256 [2020-12-22 06:56:47,860 INFO L226 Difference]: Without dead ends: 127 [2020-12-22 06:56:47,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 06:56:47,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-22 06:56:47,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-12-22 06:56:47,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 06:56:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 183 transitions. [2020-12-22 06:56:47,923 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 183 transitions. Word has length 16 [2020-12-22 06:56:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:56:47,923 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 183 transitions. [2020-12-22 06:56:47,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 06:56:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 183 transitions. [2020-12-22 06:56:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 06:56:47,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:47,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:47,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:56:47,926 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:47,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:47,927 INFO L82 PathProgramCache]: Analyzing trace with hash 450073546, now seen corresponding path program 1 times [2020-12-22 06:56:47,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:47,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077032063] [2020-12-22 06:56:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:56:48,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077032063] [2020-12-22 06:56:48,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:56:48,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:56:48,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131821183] [2020-12-22 06:56:48,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:56:48,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:56:48,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:56:48,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:56:48,108 INFO L87 Difference]: Start difference. First operand 127 states and 183 transitions. Second operand 3 states. [2020-12-22 06:56:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:56:48,123 INFO L93 Difference]: Finished difference Result 127 states and 183 transitions. [2020-12-22 06:56:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:56:48,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-22 06:56:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:56:48,125 INFO L225 Difference]: With dead ends: 127 [2020-12-22 06:56:48,125 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 06:56:48,126 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 [2020-12-22 06:56:48,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 06:56:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-22 06:56:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 06:56:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2020-12-22 06:56:48,134 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 17 [2020-12-22 06:56:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:56:48,135 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2020-12-22 06:56:48,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:56:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2020-12-22 06:56:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 06:56:48,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:48,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:48,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:56:48,137 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:48,137 INFO L82 PathProgramCache]: Analyzing trace with hash 445162074, now seen corresponding path program 1 times [2020-12-22 06:56:48,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:48,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028127939] [2020-12-22 06:56:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:56:48,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028127939] [2020-12-22 06:56:48,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:56:48,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:56:48,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013687432] [2020-12-22 06:56:48,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:56:48,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:56:48,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:56:48,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:56:48,258 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand 3 states. [2020-12-22 06:56:48,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:56:48,304 INFO L93 Difference]: Finished difference Result 147 states and 216 transitions. [2020-12-22 06:56:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:56:48,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-22 06:56:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:56:48,308 INFO L225 Difference]: With dead ends: 147 [2020-12-22 06:56:48,309 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 06:56:48,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:56:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 06:56:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-12-22 06:56:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 06:56:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 141 transitions. [2020-12-22 06:56:48,342 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 141 transitions. Word has length 22 [2020-12-22 06:56:48,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:56:48,342 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 141 transitions. [2020-12-22 06:56:48,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:56:48,342 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 141 transitions. [2020-12-22 06:56:48,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 06:56:48,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:48,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:48,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:56:48,347 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:48,349 INFO L82 PathProgramCache]: Analyzing trace with hash 96758808, now seen corresponding path program 1 times [2020-12-22 06:56:48,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:48,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790532249] [2020-12-22 06:56:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:56:48,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790532249] [2020-12-22 06:56:48,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:56:48,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:56:48,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616577064] [2020-12-22 06:56:48,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:56:48,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:56:48,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:56:48,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:56:48,502 INFO L87 Difference]: Start difference. First operand 96 states and 141 transitions. Second operand 3 states. [2020-12-22 06:56:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:56:48,575 INFO L93 Difference]: Finished difference Result 227 states and 338 transitions. [2020-12-22 06:56:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:56:48,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 06:56:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:56:48,577 INFO L225 Difference]: With dead ends: 227 [2020-12-22 06:56:48,578 INFO L226 Difference]: Without dead ends: 137 [2020-12-22 06:56:48,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:56:48,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-22 06:56:48,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2020-12-22 06:56:48,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 06:56:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 195 transitions. [2020-12-22 06:56:48,610 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 195 transitions. Word has length 24 [2020-12-22 06:56:48,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:56:48,610 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 195 transitions. [2020-12-22 06:56:48,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:56:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 195 transitions. [2020-12-22 06:56:48,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 06:56:48,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:48,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:48,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:56:48,612 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:48,613 INFO L82 PathProgramCache]: Analyzing trace with hash -732744145, now seen corresponding path program 1 times [2020-12-22 06:56:48,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:48,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347631760] [2020-12-22 06:56:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:56:48,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347631760] [2020-12-22 06:56:48,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:56:48,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:56:48,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899662493] [2020-12-22 06:56:48,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:56:48,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:56:48,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:56:48,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:56:48,687 INFO L87 Difference]: Start difference. First operand 135 states and 195 transitions. Second operand 5 states. [2020-12-22 06:56:48,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:56:48,795 INFO L93 Difference]: Finished difference Result 487 states and 709 transitions. [2020-12-22 06:56:48,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:56:48,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-12-22 06:56:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:56:48,798 INFO L225 Difference]: With dead ends: 487 [2020-12-22 06:56:48,798 INFO L226 Difference]: Without dead ends: 358 [2020-12-22 06:56:48,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:56:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-12-22 06:56:48,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 224. [2020-12-22 06:56:48,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-22 06:56:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 314 transitions. [2020-12-22 06:56:48,825 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 314 transitions. Word has length 25 [2020-12-22 06:56:48,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:56:48,826 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 314 transitions. [2020-12-22 06:56:48,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:56:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 314 transitions. [2020-12-22 06:56:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 06:56:48,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:48,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:48,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:56:48,828 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:48,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:48,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1602914161, now seen corresponding path program 1 times [2020-12-22 06:56:48,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:48,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467736808] [2020-12-22 06:56:48,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:56:48,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467736808] [2020-12-22 06:56:48,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:56:48,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:56:48,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624362241] [2020-12-22 06:56:48,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:56:48,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:56:48,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:56:48,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:56:48,946 INFO L87 Difference]: Start difference. First operand 224 states and 314 transitions. Second operand 5 states. [2020-12-22 06:56:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:56:49,105 INFO L93 Difference]: Finished difference Result 486 states and 694 transitions. [2020-12-22 06:56:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:56:49,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 06:56:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:56:49,109 INFO L225 Difference]: With dead ends: 486 [2020-12-22 06:56:49,109 INFO L226 Difference]: Without dead ends: 484 [2020-12-22 06:56:49,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:56:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-12-22 06:56:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 224. [2020-12-22 06:56:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-22 06:56:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 312 transitions. [2020-12-22 06:56:49,136 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 312 transitions. Word has length 26 [2020-12-22 06:56:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:56:49,137 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 312 transitions. [2020-12-22 06:56:49,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:56:49,137 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 312 transitions. [2020-12-22 06:56:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 06:56:49,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:49,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:49,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:56:49,140 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:49,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1235666169, now seen corresponding path program 1 times [2020-12-22 06:56:49,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:49,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910440285] [2020-12-22 06:56:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:56:49,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910440285] [2020-12-22 06:56:49,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:56:49,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:56:49,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625784416] [2020-12-22 06:56:49,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:56:49,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:56:49,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:56:49,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:56:49,207 INFO L87 Difference]: Start difference. First operand 224 states and 312 transitions. Second operand 4 states. [2020-12-22 06:56:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:56:49,281 INFO L93 Difference]: Finished difference Result 678 states and 956 transitions. [2020-12-22 06:56:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:56:49,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-12-22 06:56:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:56:49,286 INFO L225 Difference]: With dead ends: 678 [2020-12-22 06:56:49,286 INFO L226 Difference]: Without dead ends: 549 [2020-12-22 06:56:49,287 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 [2020-12-22 06:56:49,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-12-22 06:56:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 232. [2020-12-22 06:56:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-22 06:56:49,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 320 transitions. [2020-12-22 06:56:49,315 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 320 transitions. Word has length 34 [2020-12-22 06:56:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:56:49,315 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 320 transitions. [2020-12-22 06:56:49,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:56:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 320 transitions. [2020-12-22 06:56:49,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 06:56:49,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:49,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:49,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:56:49,317 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:49,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:49,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1822472183, now seen corresponding path program 1 times [2020-12-22 06:56:49,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:49,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112063638] [2020-12-22 06:56:49,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:56:49,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112063638] [2020-12-22 06:56:49,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:56:49,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:56:49,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260265422] [2020-12-22 06:56:49,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:56:49,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:56:49,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:56:49,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:56:49,392 INFO L87 Difference]: Start difference. First operand 232 states and 320 transitions. Second operand 5 states. [2020-12-22 06:56:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:56:49,615 INFO L93 Difference]: Finished difference Result 828 states and 1170 transitions. [2020-12-22 06:56:49,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:56:49,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 06:56:49,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:56:49,619 INFO L225 Difference]: With dead ends: 828 [2020-12-22 06:56:49,620 INFO L226 Difference]: Without dead ends: 691 [2020-12-22 06:56:49,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:56:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2020-12-22 06:56:49,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 327. [2020-12-22 06:56:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-22 06:56:49,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 447 transitions. [2020-12-22 06:56:49,656 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 447 transitions. Word has length 34 [2020-12-22 06:56:49,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:56:49,657 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 447 transitions. [2020-12-22 06:56:49,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:56:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 447 transitions. [2020-12-22 06:56:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 06:56:49,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:49,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:49,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:56:49,659 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:49,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:49,659 INFO L82 PathProgramCache]: Analyzing trace with hash 44197509, now seen corresponding path program 1 times [2020-12-22 06:56:49,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:49,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325832146] [2020-12-22 06:56:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:56:49,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325832146] [2020-12-22 06:56:49,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:56:49,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:56:49,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837103564] [2020-12-22 06:56:49,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:56:49,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:56:49,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:56:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:56:49,718 INFO L87 Difference]: Start difference. First operand 327 states and 447 transitions. Second operand 4 states. [2020-12-22 06:56:49,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:56:49,830 INFO L93 Difference]: Finished difference Result 614 states and 851 transitions. [2020-12-22 06:56:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:56:49,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-12-22 06:56:49,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:56:49,834 INFO L225 Difference]: With dead ends: 614 [2020-12-22 06:56:49,834 INFO L226 Difference]: Without dead ends: 380 [2020-12-22 06:56:49,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:56:49,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-12-22 06:56:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 366. [2020-12-22 06:56:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-12-22 06:56:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 507 transitions. [2020-12-22 06:56:49,870 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 507 transitions. Word has length 34 [2020-12-22 06:56:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:56:49,871 INFO L481 AbstractCegarLoop]: Abstraction has 366 states and 507 transitions. [2020-12-22 06:56:49,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:56:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 507 transitions. [2020-12-22 06:56:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:56:49,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:49,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:49,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:56:49,873 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:49,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:49,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1294771641, now seen corresponding path program 1 times [2020-12-22 06:56:49,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:49,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452675082] [2020-12-22 06:56:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 06:56:49,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452675082] [2020-12-22 06:56:49,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:56:49,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:56:49,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845576354] [2020-12-22 06:56:49,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:56:49,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:56:49,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:56:49,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:56:49,925 INFO L87 Difference]: Start difference. First operand 366 states and 507 transitions. Second operand 3 states. [2020-12-22 06:56:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:56:49,998 INFO L93 Difference]: Finished difference Result 455 states and 626 transitions. [2020-12-22 06:56:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:56:49,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 06:56:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:56:50,000 INFO L225 Difference]: With dead ends: 455 [2020-12-22 06:56:50,000 INFO L226 Difference]: Without dead ends: 175 [2020-12-22 06:56:50,001 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 [2020-12-22 06:56:50,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-22 06:56:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 163. [2020-12-22 06:56:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 06:56:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 213 transitions. [2020-12-22 06:56:50,018 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 213 transitions. Word has length 50 [2020-12-22 06:56:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:56:50,018 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 213 transitions. [2020-12-22 06:56:50,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:56:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 213 transitions. [2020-12-22 06:56:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:56:50,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:50,019 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:50,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:56:50,020 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:50,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:50,020 INFO L82 PathProgramCache]: Analyzing trace with hash 432163154, now seen corresponding path program 1 times [2020-12-22 06:56:50,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:50,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337367621] [2020-12-22 06:56:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 06:56:50,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337367621] [2020-12-22 06:56:50,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:56:50,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:56:50,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467099892] [2020-12-22 06:56:50,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:56:50,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:56:50,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:56:50,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:56:50,083 INFO L87 Difference]: Start difference. First operand 163 states and 213 transitions. Second operand 5 states. [2020-12-22 06:56:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:56:50,164 INFO L93 Difference]: Finished difference Result 430 states and 560 transitions. [2020-12-22 06:56:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:56:50,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-22 06:56:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:56:50,167 INFO L225 Difference]: With dead ends: 430 [2020-12-22 06:56:50,167 INFO L226 Difference]: Without dead ends: 273 [2020-12-22 06:56:50,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:56:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-22 06:56:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 172. [2020-12-22 06:56:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-22 06:56:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 222 transitions. [2020-12-22 06:56:50,211 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 222 transitions. Word has length 52 [2020-12-22 06:56:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:56:50,212 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 222 transitions. [2020-12-22 06:56:50,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:56:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 222 transitions. [2020-12-22 06:56:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:56:50,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:50,213 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:50,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:56:50,213 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:50,214 INFO L82 PathProgramCache]: Analyzing trace with hash 706922768, now seen corresponding path program 1 times [2020-12-22 06:56:50,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:50,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915298550] [2020-12-22 06:56:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 06:56:50,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915298550] [2020-12-22 06:56:50,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:56:50,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:56:50,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17901573] [2020-12-22 06:56:50,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:56:50,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:56:50,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:56:50,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:56:50,281 INFO L87 Difference]: Start difference. First operand 172 states and 222 transitions. Second operand 5 states. [2020-12-22 06:56:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:56:50,345 INFO L93 Difference]: Finished difference Result 350 states and 452 transitions. [2020-12-22 06:56:50,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:56:50,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-22 06:56:50,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:56:50,348 INFO L225 Difference]: With dead ends: 350 [2020-12-22 06:56:50,348 INFO L226 Difference]: Without dead ends: 184 [2020-12-22 06:56:50,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:56:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-22 06:56:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 139. [2020-12-22 06:56:50,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 06:56:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2020-12-22 06:56:50,373 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 52 [2020-12-22 06:56:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:56:50,373 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2020-12-22 06:56:50,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:56:50,373 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2020-12-22 06:56:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:56:50,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:50,375 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:50,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:56:50,375 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:50,376 INFO L82 PathProgramCache]: Analyzing trace with hash 134497996, now seen corresponding path program 1 times [2020-12-22 06:56:50,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:50,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844242426] [2020-12-22 06:56:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:56:50,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844242426] [2020-12-22 06:56:50,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576331762] [2020-12-22 06:56:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:56:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:56:50,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 06:56:50,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:56:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:56:50,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:56:50,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-22 06:56:50,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917956099] [2020-12-22 06:56:50,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 06:56:50,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:56:50,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 06:56:50,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:56:50,760 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand 8 states. [2020-12-22 06:56:51,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:56:51,109 INFO L93 Difference]: Finished difference Result 526 states and 680 transitions. [2020-12-22 06:56:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 06:56:51,110 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-12-22 06:56:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:56:51,112 INFO L225 Difference]: With dead ends: 526 [2020-12-22 06:56:51,112 INFO L226 Difference]: Without dead ends: 417 [2020-12-22 06:56:51,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-12-22 06:56:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-12-22 06:56:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 191. [2020-12-22 06:56:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-22 06:56:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 243 transitions. [2020-12-22 06:56:51,142 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 243 transitions. Word has length 53 [2020-12-22 06:56:51,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:56:51,142 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 243 transitions. [2020-12-22 06:56:51,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 06:56:51,142 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 243 transitions. [2020-12-22 06:56:51,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 06:56:51,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:56:51,144 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:56:51,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 06:56:51,358 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:56:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:56:51,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1809371945, now seen corresponding path program 2 times [2020-12-22 06:56:51,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:56:51,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665610473] [2020-12-22 06:56:51,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:56:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 06:56:51,442 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 06:56:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 06:56:51,534 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 06:56:51,623 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 06:56:51,623 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 06:56:51,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:56:51,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 06:56:51 BoogieIcfgContainer [2020-12-22 06:56:51,856 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 06:56:51,857 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 06:56:51,857 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 06:56:51,858 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 06:56:51,858 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:47" (3/4) ... [2020-12-22 06:56:51,863 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 06:56:52,083 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/product-lines/minepump_spec4_product47.cil.c-witness.graphml [2020-12-22 06:56:52,083 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 06:56:52,086 INFO L168 Benchmark]: Toolchain (without parser) took 6835.40 ms. Allocated memory was 151.0 MB in the beginning and 200.3 MB in the end (delta: 49.3 MB). Free memory was 125.7 MB in the beginning and 69.9 MB in the end (delta: 55.8 MB). Peak memory consumption was 105.5 MB. Max. memory is 8.0 GB. [2020-12-22 06:56:52,086 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 06:56:52,087 INFO L168 Benchmark]: CACSL2BoogieTranslator took 559.58 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 104.2 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-22 06:56:52,088 INFO L168 Benchmark]: Boogie Procedure Inliner took 132.04 ms. Allocated memory is still 151.0 MB. Free memory was 104.1 MB in the beginning and 132.5 MB in the end (delta: -28.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 8.0 GB. [2020-12-22 06:56:52,088 INFO L168 Benchmark]: Boogie Preprocessor took 105.11 ms. Allocated memory is still 151.0 MB. Free memory was 132.5 MB in the beginning and 129.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 06:56:52,088 INFO L168 Benchmark]: RCFGBuilder took 1221.23 ms. Allocated memory is still 151.0 MB. Free memory was 129.9 MB in the beginning and 63.8 MB in the end (delta: 66.1 MB). Peak memory consumption was 66.1 MB. Max. memory is 8.0 GB. [2020-12-22 06:56:52,089 INFO L168 Benchmark]: TraceAbstraction took 4575.91 ms. Allocated memory was 151.0 MB in the beginning and 200.3 MB in the end (delta: 49.3 MB). Free memory was 63.3 MB in the beginning and 98.2 MB in the end (delta: -35.0 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. [2020-12-22 06:56:52,089 INFO L168 Benchmark]: Witness Printer took 226.36 ms. Allocated memory is still 200.3 MB. Free memory was 98.2 MB in the beginning and 69.9 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2020-12-22 06:56:52,091 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 559.58 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 104.2 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 132.04 ms. Allocated memory is still 151.0 MB. Free memory was 104.1 MB in the beginning and 132.5 MB in the end (delta: -28.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 105.11 ms. Allocated memory is still 151.0 MB. Free memory was 132.5 MB in the beginning and 129.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1221.23 ms. Allocated memory is still 151.0 MB. Free memory was 129.9 MB in the beginning and 63.8 MB in the end (delta: 66.1 MB). Peak memory consumption was 66.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4575.91 ms. Allocated memory was 151.0 MB in the beginning and 200.3 MB in the end (delta: 49.3 MB). Free memory was 63.3 MB in the beginning and 98.2 MB in the end (delta: -35.0 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. * Witness Printer took 226.36 ms. Allocated memory is still 200.3 MB. Free memory was 98.2 MB in the beginning and 69.9 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 830]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int cleanupTimeShifts = 4; [L221] int pumpRunning = 0; [L222] int systemActive = 1; [L601] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L870] int waterLevel = 1; [L871] int methaneLevelCritical = 0; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L123] int retValue_acc ; [L124] int tmp ; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L861] int retValue_acc ; [L864] retValue_acc = 1 [L865] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L130] tmp = valid_product() [L132] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L148] int splverifierCounter ; [L149] int tmp ; [L150] int tmp___0 ; [L151] int tmp___1 ; [L152] int tmp___2 ; [L155] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L157] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L159] COND TRUE splverifierCounter < 4 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L165] tmp = __VERIFIER_nondet_int() [L167] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L888] COND TRUE waterLevel < 2 [L889] waterLevel = waterLevel + 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L175] tmp___0 = __VERIFIER_nondet_int() [L177] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L185] tmp___2 = __VERIFIER_nondet_int() [L187] COND TRUE \read(tmp___2) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L229] COND FALSE !(\read(pumpRunning)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L236] COND TRUE \read(systemActive) [L284] int tmp ; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L287] COND FALSE !(\read(pumpRunning)) [L258] int tmp ; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L261] COND TRUE ! pumpRunning [L398] int retValue_acc ; [L399] int tmp ; [L400] int tmp___0 ; [L950] int retValue_acc ; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L953] COND FALSE !(waterLevel < 2) [L957] retValue_acc = 0 [L958] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L404] tmp = isHighWaterSensorDry() [L406] COND FALSE !(\read(tmp)) [L409] tmp___0 = 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L411] retValue_acc = tmp___0 [L412] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L263] tmp = isHighWaterLevel() [L265] COND TRUE \read(tmp) [L317] int tmp ; [L342] int retValue_acc ; [L909] int retValue_acc ; [L912] retValue_acc = methaneLevelCritical [L913] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L346] retValue_acc = isMethaneLevelCritical() [L348] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L321] tmp = isMethaneAlarm() [L323] COND FALSE !(\read(tmp)) [L312] pumpRunning = 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L801] int tmp ; [L802] int tmp___0 ; [L941] int retValue_acc ; [L944] retValue_acc = waterLevel [L945] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L806] tmp = getWaterLevel() [L808] COND FALSE !(tmp == 0) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L157] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L159] COND TRUE splverifierCounter < 4 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L165] tmp = __VERIFIER_nondet_int() [L167] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L175] tmp___0 = __VERIFIER_nondet_int() [L177] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L185] tmp___2 = __VERIFIER_nondet_int() [L187] COND TRUE \read(tmp___2) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L229] COND TRUE \read(pumpRunning) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L876] COND TRUE waterLevel > 0 [L877] waterLevel = waterLevel - 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L236] COND TRUE \read(systemActive) [L284] int tmp ; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L287] COND TRUE \read(pumpRunning) [L342] int retValue_acc ; [L909] int retValue_acc ; [L912] retValue_acc = methaneLevelCritical [L913] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L346] retValue_acc = isMethaneLevelCritical() [L348] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L289] tmp = isMethaneAlarm() [L291] COND FALSE !(\read(tmp)) [L258] int tmp ; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L261] COND FALSE !(! pumpRunning) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L801] int tmp ; [L802] int tmp___0 ; [L941] int retValue_acc ; [L944] retValue_acc = waterLevel [L945] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L806] tmp = getWaterLevel() [L808] COND FALSE !(tmp == 0) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L157] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L159] COND TRUE splverifierCounter < 4 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L165] tmp = __VERIFIER_nondet_int() [L167] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L175] tmp___0 = __VERIFIER_nondet_int() [L177] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L185] tmp___2 = __VERIFIER_nondet_int() [L187] COND TRUE \read(tmp___2) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L229] COND TRUE \read(pumpRunning) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L876] COND TRUE waterLevel > 0 [L877] waterLevel = waterLevel - 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L236] COND TRUE \read(systemActive) [L284] int tmp ; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L287] COND TRUE \read(pumpRunning) [L342] int retValue_acc ; [L909] int retValue_acc ; [L912] retValue_acc = methaneLevelCritical [L913] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L346] retValue_acc = isMethaneLevelCritical() [L348] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L289] tmp = isMethaneAlarm() [L291] COND FALSE !(\read(tmp)) [L258] int tmp ; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L261] COND FALSE !(! pumpRunning) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L801] int tmp ; [L802] int tmp___0 ; [L941] int retValue_acc ; [L944] retValue_acc = waterLevel [L945] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L806] tmp = getWaterLevel() [L808] COND TRUE tmp == 0 [L353] int retValue_acc ; [L356] retValue_acc = pumpRunning [L357] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L810] tmp___0 = isPumpRunning() [L812] COND TRUE \read(tmp___0) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L830] reach_error() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 131 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.2s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1586 SDtfs, 1825 SDslu, 2243 SDs, 0 SdLazy, 308 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=366occurred 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: 0.3s AutomataMinimizationTime, 13 MinimizatonAttempts, 1479 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 564 NumberOfCodeBlocks, 564 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 478 ConstructedInterpolants, 0 QuantifiedInterpolants, 33474 SizeOfPredicates, 3 NumberOfNonLiveVariables, 432 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 63/69 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...