/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-simple/nested_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:49:32,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:49:32,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:49:32,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 04:49:32,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:49:32,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:49:32,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:49:32,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:49:32,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:49:32,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:49:32,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:49:32,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:49:32,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:49:32,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:49:32,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:49:32,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:49:32,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:49:32,855 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:49:32,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:49:32,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:49:32,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:49:32,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:49:32,885 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:49:32,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:49:32,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:49:32,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:49:32,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:49:32,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:49:32,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:49:32,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:49:32,887 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:49:32,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:49:32,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:49:32,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:49:32,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:49:32,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:49:32,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:49:32,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:49:32,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:49:32,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:49:32,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:49:32,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:49:32,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:49:32,890 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:49:33,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:49:33,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:49:33,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:49:33,333 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:49:33,334 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:49:33,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_3.c [2020-12-22 04:49:33,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3809d5de/82bcc4441c674cec96a2e1206bfb1378/FLAGa889c9671 [2020-12-22 04:49:33,960 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:49:33,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_3.c [2020-12-22 04:49:33,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3809d5de/82bcc4441c674cec96a2e1206bfb1378/FLAGa889c9671 [2020-12-22 04:49:34,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3809d5de/82bcc4441c674cec96a2e1206bfb1378 [2020-12-22 04:49:34,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:49:34,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:49:34,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:49:34,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:49:34,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:49:34,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:49:34" (1/1) ... [2020-12-22 04:49:34,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d25ce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:34, skipping insertion in model container [2020-12-22 04:49:34,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:49:34" (1/1) ... [2020-12-22 04:49:34,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:49:34,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:49:34,520 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/loop-simple/nested_3.c[784,797] [2020-12-22 04:49:34,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:49:34,537 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:49:34,556 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/loop-simple/nested_3.c[784,797] [2020-12-22 04:49:34,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:49:34,579 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:49:34,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:34 WrapperNode [2020-12-22 04:49:34,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:49:34,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:49:34,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:49:34,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:49:34,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:34" (1/1) ... [2020-12-22 04:49:34,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:34" (1/1) ... [2020-12-22 04:49:34,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:49:34,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:49:34,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:49:34,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:49:34,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:34" (1/1) ... [2020-12-22 04:49:34,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:34" (1/1) ... [2020-12-22 04:49:34,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:34" (1/1) ... [2020-12-22 04:49:34,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:34" (1/1) ... [2020-12-22 04:49:34,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:34" (1/1) ... [2020-12-22 04:49:34,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:34" (1/1) ... [2020-12-22 04:49:34,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:34" (1/1) ... [2020-12-22 04:49:34,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:49:34,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:49:34,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:49:34,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:49:34,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:34" (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 04:49:34,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:49:34,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:49:34,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:49:34,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:49:35,164 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:49:35,164 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:49:35,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:35 BoogieIcfgContainer [2020-12-22 04:49:35,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:49:35,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:49:35,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:49:35,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:49:35,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:49:34" (1/3) ... [2020-12-22 04:49:35,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529306d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:49:35, skipping insertion in model container [2020-12-22 04:49:35,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:34" (2/3) ... [2020-12-22 04:49:35,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529306d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:49:35, skipping insertion in model container [2020-12-22 04:49:35,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:35" (3/3) ... [2020-12-22 04:49:35,179 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_3.c [2020-12-22 04:49:35,187 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:49:35,193 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:49:35,222 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:49:35,277 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:49:35,277 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:49:35,277 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:49:35,278 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:49:35,278 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:49:35,278 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:49:35,278 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:49:35,278 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:49:35,295 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-22 04:49:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-22 04:49:35,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:35,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-22 04:49:35,302 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:35,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:35,309 INFO L82 PathProgramCache]: Analyzing trace with hash 28726596, now seen corresponding path program 1 times [2020-12-22 04:49:35,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:35,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157173811] [2020-12-22 04:49:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:35,522 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 04:49:35,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157173811] [2020-12-22 04:49:35,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:35,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:49:35,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150110595] [2020-12-22 04:49:35,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:49:35,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:35,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:49:35,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:49:35,559 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-12-22 04:49:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:35,580 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2020-12-22 04:49:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:49:35,582 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-22 04:49:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:35,607 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:49:35,607 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:49:35,611 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 04:49:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:49:35,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 04:49:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:49:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-22 04:49:35,647 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2020-12-22 04:49:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:35,648 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-22 04:49:35,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:49:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-22 04:49:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-22 04:49:35,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:35,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-22 04:49:35,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:49:35,650 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:35,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:35,651 INFO L82 PathProgramCache]: Analyzing trace with hash 28697766, now seen corresponding path program 1 times [2020-12-22 04:49:35,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:35,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918824362] [2020-12-22 04:49:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:35,705 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 04:49:35,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918824362] [2020-12-22 04:49:35,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:35,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:35,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418935658] [2020-12-22 04:49:35,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:35,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:35,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:35,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:35,710 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 3 states. [2020-12-22 04:49:35,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:35,742 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-22 04:49:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:35,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-22 04:49:35,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:35,743 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:49:35,744 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:49:35,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:49:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:49:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2020-12-22 04:49:35,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:49:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-22 04:49:35,756 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2020-12-22 04:49:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:35,759 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-22 04:49:35,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-22 04:49:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:49:35,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:35,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:35,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:49:35,761 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:35,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:35,765 INFO L82 PathProgramCache]: Analyzing trace with hash 269702254, now seen corresponding path program 1 times [2020-12-22 04:49:35,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:35,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201357069] [2020-12-22 04:49:35,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:35,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201357069] [2020-12-22 04:49:35,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:35,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:35,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253564848] [2020-12-22 04:49:35,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:35,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:35,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:35,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:35,851 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2020-12-22 04:49:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:35,885 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-12-22 04:49:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:35,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 04:49:35,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:35,887 INFO L225 Difference]: With dead ends: 25 [2020-12-22 04:49:35,887 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:49:35,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:49:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:49:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2020-12-22 04:49:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:49:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-22 04:49:35,899 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2020-12-22 04:49:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:35,899 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-22 04:49:35,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-22 04:49:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:49:35,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:35,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:35,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:49:35,901 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:35,902 INFO L82 PathProgramCache]: Analyzing trace with hash 904437762, now seen corresponding path program 1 times [2020-12-22 04:49:35,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:35,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104187223] [2020-12-22 04:49:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:35,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104187223] [2020-12-22 04:49:35,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:35,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:35,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510124701] [2020-12-22 04:49:35,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:35,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:35,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:36,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:36,002 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-12-22 04:49:36,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:36,042 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-12-22 04:49:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:36,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-22 04:49:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:36,045 INFO L225 Difference]: With dead ends: 25 [2020-12-22 04:49:36,046 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 04:49:36,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:49:36,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 04:49:36,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-22 04:49:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:49:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-22 04:49:36,057 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2020-12-22 04:49:36,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:36,059 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-22 04:49:36,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-22 04:49:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:49:36,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:36,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:36,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 04:49:36,061 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:36,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2012164800, now seen corresponding path program 1 times [2020-12-22 04:49:36,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:36,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636132773] [2020-12-22 04:49:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:36,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636132773] [2020-12-22 04:49:36,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26218920] [2020-12-22 04:49:36,151 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 04:49:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:49:36,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:36,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:36,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:49:36,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856684435] [2020-12-22 04:49:36,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:49:36,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:36,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:49:36,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:49:36,319 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-12-22 04:49:36,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:36,356 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-12-22 04:49:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:49:36,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-22 04:49:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:36,360 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:49:36,361 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:49:36,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:49:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:49:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-22 04:49:36,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:49:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-22 04:49:36,372 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-12-22 04:49:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:36,373 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-22 04:49:36,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:49:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-22 04:49:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:49:36,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:36,374 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:36,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:36,589 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:36,591 INFO L82 PathProgramCache]: Analyzing trace with hash -253582594, now seen corresponding path program 2 times [2020-12-22 04:49:36,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:36,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349845936] [2020-12-22 04:49:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:49:36,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349845936] [2020-12-22 04:49:36,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850081761] [2020-12-22 04:49:36,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:36,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:36,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:36,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:49:36,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:36,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:36,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 04:49:36,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950079582] [2020-12-22 04:49:36,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:49:36,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:36,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:49:36,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:36,758 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-12-22 04:49:36,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:36,902 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-12-22 04:49:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:49:36,903 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-22 04:49:36,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:36,904 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:49:36,904 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:49:36,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:49:36,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:49:36,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-12-22 04:49:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:49:36,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-22 04:49:36,912 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2020-12-22 04:49:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:36,913 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-22 04:49:36,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:49:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-22 04:49:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:49:36,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:36,914 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:37,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:37,129 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:37,131 INFO L82 PathProgramCache]: Analyzing trace with hash -311567314, now seen corresponding path program 3 times [2020-12-22 04:49:37,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:37,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576522759] [2020-12-22 04:49:37,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 04:49:37,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576522759] [2020-12-22 04:49:37,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734361995] [2020-12-22 04:49:37,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:37,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:49:37,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:37,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:49:37,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 04:49:37,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:37,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:49:37,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037932622] [2020-12-22 04:49:37,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:49:37,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:37,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:49:37,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:49:37,271 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-12-22 04:49:37,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:37,291 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-12-22 04:49:37,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:49:37,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 04:49:37,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:37,293 INFO L225 Difference]: With dead ends: 71 [2020-12-22 04:49:37,293 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:49:37,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:49:37,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:49:37,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-12-22 04:49:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:49:37,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-12-22 04:49:37,304 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 26 [2020-12-22 04:49:37,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:37,304 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-12-22 04:49:37,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:49:37,305 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-12-22 04:49:37,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 04:49:37,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:37,306 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:37,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:37,520 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash -936285786, now seen corresponding path program 4 times [2020-12-22 04:49:37,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:37,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327905338] [2020-12-22 04:49:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 82 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 04:49:37,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327905338] [2020-12-22 04:49:37,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328764290] [2020-12-22 04:49:37,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:37,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:37,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:49:37,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 82 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 04:49:37,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:37,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:49:37,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767356250] [2020-12-22 04:49:37,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:49:37,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:37,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:49:37,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:37,828 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 7 states. [2020-12-22 04:49:37,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:37,884 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2020-12-22 04:49:37,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:49:37,885 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-12-22 04:49:37,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:37,886 INFO L225 Difference]: With dead ends: 97 [2020-12-22 04:49:37,886 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:49:37,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:49:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-12-22 04:49:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:49:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-12-22 04:49:37,905 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2020-12-22 04:49:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:37,906 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-12-22 04:49:37,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:49:37,906 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-12-22 04:49:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 04:49:37,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:37,908 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:38,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:38,109 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:38,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1097513562, now seen corresponding path program 5 times [2020-12-22 04:49:38,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:38,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447618480] [2020-12-22 04:49:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 130 proven. 16 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-22 04:49:38,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447618480] [2020-12-22 04:49:38,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204904067] [2020-12-22 04:49:38,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:38,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 04:49:38,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:38,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:49:38,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 218 proven. 16 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2020-12-22 04:49:38,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:38,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:49:38,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298840122] [2020-12-22 04:49:38,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:49:38,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:38,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:49:38,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:49:38,298 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 8 states. [2020-12-22 04:49:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:38,333 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2020-12-22 04:49:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:49:38,334 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-12-22 04:49:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:38,335 INFO L225 Difference]: With dead ends: 111 [2020-12-22 04:49:38,335 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:49:38,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:49:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:49:38,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-12-22 04:49:38,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 04:49:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-12-22 04:49:38,345 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 55 [2020-12-22 04:49:38,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:38,345 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-12-22 04:49:38,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:49:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-12-22 04:49:38,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 04:49:38,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:38,348 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:38,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:38,564 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1691369894, now seen corresponding path program 6 times [2020-12-22 04:49:38,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:38,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827016552] [2020-12-22 04:49:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 190 proven. 25 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-22 04:49:38,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827016552] [2020-12-22 04:49:38,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543158983] [2020-12-22 04:49:38,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:38,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-22 04:49:38,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:38,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:49:38,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 318 proven. 25 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-12-22 04:49:38,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:38,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:49:38,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026321951] [2020-12-22 04:49:38,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:49:38,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:38,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:49:38,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:38,870 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 9 states. [2020-12-22 04:49:38,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:38,921 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2020-12-22 04:49:38,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:49:38,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-12-22 04:49:38,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:38,926 INFO L225 Difference]: With dead ends: 121 [2020-12-22 04:49:38,927 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:49:38,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:38,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:49:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-22 04:49:38,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 04:49:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-12-22 04:49:38,951 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 63 [2020-12-22 04:49:38,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:38,952 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-12-22 04:49:38,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:49:38,952 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-12-22 04:49:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 04:49:38,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:38,956 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:39,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:39,159 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:39,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:39,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1900076454, now seen corresponding path program 7 times [2020-12-22 04:49:39,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:39,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100116487] [2020-12-22 04:49:39,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 355 proven. 89 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-12-22 04:49:39,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100116487] [2020-12-22 04:49:39,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969324935] [2020-12-22 04:49:39,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:39,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:49:39,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 355 proven. 89 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-12-22 04:49:39,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:39,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:49:39,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504069204] [2020-12-22 04:49:39,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:49:39,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:39,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:49:39,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:49:39,361 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 6 states. [2020-12-22 04:49:39,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:39,390 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2020-12-22 04:49:39,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:49:39,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-12-22 04:49:39,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:39,392 INFO L225 Difference]: With dead ends: 168 [2020-12-22 04:49:39,392 INFO L226 Difference]: Without dead ends: 130 [2020-12-22 04:49:39,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:49:39,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-22 04:49:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2020-12-22 04:49:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 04:49:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2020-12-22 04:49:39,405 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 71 [2020-12-22 04:49:39,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:39,405 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2020-12-22 04:49:39,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:49:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2020-12-22 04:49:39,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 04:49:39,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:39,407 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:39,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:39,620 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:39,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:39,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1075796806, now seen corresponding path program 8 times [2020-12-22 04:49:39,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:39,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65023925] [2020-12-22 04:49:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 792 proven. 264 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2020-12-22 04:49:39,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65023925] [2020-12-22 04:49:39,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88627286] [2020-12-22 04:49:39,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:39,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:39,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:49:39,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 792 proven. 264 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2020-12-22 04:49:39,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:39,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:49:39,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898087171] [2020-12-22 04:49:39,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:49:39,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:39,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:49:39,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:39,961 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 7 states. [2020-12-22 04:49:39,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:39,993 INFO L93 Difference]: Finished difference Result 213 states and 231 transitions. [2020-12-22 04:49:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:49:39,994 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2020-12-22 04:49:39,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:39,995 INFO L225 Difference]: With dead ends: 213 [2020-12-22 04:49:39,995 INFO L226 Difference]: Without dead ends: 160 [2020-12-22 04:49:39,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-22 04:49:40,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 132. [2020-12-22 04:49:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 04:49:40,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2020-12-22 04:49:40,009 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 101 [2020-12-22 04:49:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:40,009 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2020-12-22 04:49:40,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:49:40,010 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2020-12-22 04:49:40,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 04:49:40,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:40,012 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:40,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:49:40,225 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:40,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:40,227 INFO L82 PathProgramCache]: Analyzing trace with hash -538489946, now seen corresponding path program 9 times [2020-12-22 04:49:40,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:40,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030335610] [2020-12-22 04:49:40,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2745 backedges. 1403 proven. 526 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2020-12-22 04:49:40,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030335610] [2020-12-22 04:49:40,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10451928] [2020-12-22 04:49:40,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:40,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2020-12-22 04:49:40,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:40,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:49:40,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2745 backedges. 1677 proven. 0 refuted. 0 times theorem prover too weak. 1068 trivial. 0 not checked. [2020-12-22 04:49:40,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:49:40,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2020-12-22 04:49:40,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346295557] [2020-12-22 04:49:40,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:49:40,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:40,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:49:40,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:49:40,776 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand 11 states. [2020-12-22 04:49:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:40,836 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2020-12-22 04:49:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:49:40,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 131 [2020-12-22 04:49:40,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:40,838 INFO L225 Difference]: With dead ends: 132 [2020-12-22 04:49:40,838 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 04:49:40,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:49:40,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 04:49:40,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 04:49:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 04:49:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 04:49:40,840 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 131 [2020-12-22 04:49:40,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:40,840 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 04:49:40,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:49:40,840 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 04:49:40,841 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 04:49:41,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:41,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 04:49:41,352 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 21 [2020-12-22 04:49:41,427 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 04:49:41,427 INFO L192 CegarLoopUtils]: At program point L31(lines 15 32) the Hoare annotation is: true [2020-12-22 04:49:41,427 INFO L189 CegarLoopUtils]: For program point L29(line 29) no Hoare annotation was computed. [2020-12-22 04:49:41,427 INFO L189 CegarLoopUtils]: For program point L23-2(lines 23 25) no Hoare annotation was computed. [2020-12-22 04:49:41,427 INFO L185 CegarLoopUtils]: At program point L23-3(lines 23 25) the Hoare annotation is: (and (< ULTIMATE.start_main_~c~0 7) (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 6)) [2020-12-22 04:49:41,428 INFO L189 CegarLoopUtils]: For program point L21-2(lines 21 27) no Hoare annotation was computed. [2020-12-22 04:49:41,428 INFO L185 CegarLoopUtils]: At program point L21-3(lines 21 27) the Hoare annotation is: (and (< ULTIMATE.start_main_~c~0 7) (< ULTIMATE.start_main_~b~0 7) (<= 6 ULTIMATE.start_main_~b~0) (<= 6 ULTIMATE.start_main_~c~0) (< ULTIMATE.start_main_~a~0 7)) [2020-12-22 04:49:41,428 INFO L189 CegarLoopUtils]: For program point L21-4(lines 15 32) no Hoare annotation was computed. [2020-12-22 04:49:41,428 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 04:49:41,428 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 04:49:41,428 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 04:49:41,428 INFO L189 CegarLoopUtils]: For program point L28-1(lines 28 30) no Hoare annotation was computed. [2020-12-22 04:49:41,428 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) no Hoare annotation was computed. [2020-12-22 04:49:41,429 INFO L189 CegarLoopUtils]: For program point L22-2(lines 22 26) no Hoare annotation was computed. [2020-12-22 04:49:41,429 INFO L185 CegarLoopUtils]: At program point L22-3(lines 22 26) the Hoare annotation is: (and (< ULTIMATE.start_main_~c~0 7) (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 7) (<= 6 ULTIMATE.start_main_~c~0)) [2020-12-22 04:49:41,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:49:41 BoogieIcfgContainer [2020-12-22 04:49:41,459 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:49:41,460 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:49:41,460 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:49:41,460 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:49:41,461 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:35" (3/4) ... [2020-12-22 04:49:41,464 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 04:49:41,475 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-22 04:49:41,476 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 04:49:41,476 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:49:41,476 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:49:41,534 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-simple/nested_3.c-witness.graphml [2020-12-22 04:49:41,535 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:49:41,536 INFO L168 Benchmark]: Toolchain (without parser) took 7217.51 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 119.9 MB in the beginning and 150.2 MB in the end (delta: -30.3 MB). Peak memory consumption was 2.2 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:41,537 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:49:41,540 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.21 ms. Allocated memory is still 157.3 MB. Free memory was 119.6 MB in the beginning and 110.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:41,540 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.66 ms. Allocated memory is still 157.3 MB. Free memory was 110.4 MB in the beginning and 108.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:41,544 INFO L168 Benchmark]: Boogie Preprocessor took 55.16 ms. Allocated memory is still 157.3 MB. Free memory was 108.9 MB in the beginning and 108.1 MB in the end (delta: 831.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:41,545 INFO L168 Benchmark]: RCFGBuilder took 475.05 ms. Allocated memory is still 157.3 MB. Free memory was 107.8 MB in the beginning and 136.2 MB in the end (delta: -28.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:41,545 INFO L168 Benchmark]: TraceAbstraction took 6291.41 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 135.7 MB in the beginning and 152.3 MB in the end (delta: -16.6 MB). Peak memory consumption was 106.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:41,546 INFO L168 Benchmark]: Witness Printer took 74.81 ms. Allocated memory is still 188.7 MB. Free memory was 152.3 MB in the beginning and 150.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:41,551 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 157.3 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.21 ms. Allocated memory is still 157.3 MB. Free memory was 119.6 MB in the beginning and 110.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.66 ms. Allocated memory is still 157.3 MB. Free memory was 110.4 MB in the beginning and 108.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.16 ms. Allocated memory is still 157.3 MB. Free memory was 108.9 MB in the beginning and 108.1 MB in the end (delta: 831.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 475.05 ms. Allocated memory is still 157.3 MB. Free memory was 107.8 MB in the beginning and 136.2 MB in the end (delta: -28.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6291.41 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 135.7 MB in the beginning and 152.3 MB in the end (delta: -16.6 MB). Peak memory consumption was 106.0 MB. Max. memory is 8.0 GB. * Witness Printer took 74.81 ms. Allocated memory is still 188.7 MB. Free memory was 152.3 MB in the beginning and 150.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 29]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((c < 7 && b < 7) && 6 <= b) && 6 <= c) && a < 7 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((c < 7 && a < 6) && b < 7) && 6 <= c - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (c < 7 && a < 6) && b < 6 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.7s, OverallIterations: 13, TraceHistogramMax: 48, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 138 SDtfs, 100 SDslu, 247 SDs, 0 SdLazy, 254 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 584 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 105 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 74 NumberOfFragments, 40 HoareAnnotationTreeSize, 4 FomulaSimplifications, 2590 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 4 FomulaSimplificationsInter, 66 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 1073 NumberOfCodeBlocks, 964 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 1051 ConstructedInterpolants, 0 QuantifiedInterpolants, 167353 SizeOfPredicates, 3 NumberOfNonLiveVariables, 914 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 22 InterpolantComputations, 5 PerfectInterpolantSequences, 10774/12115 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...