/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/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:32:25,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:32:25,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:32:25,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:32:25,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:32:25,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:32:25,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:32:25,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:32:25,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:32:25,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:32:25,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:32:25,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:32:25,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:32:25,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:32:25,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:32:25,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:32:25,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:32:25,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:32:25,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:32:25,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:32:25,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:32:25,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:32:25,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:32:25,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:32:25,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:32:25,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:32:25,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:32:25,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:32:25,492 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:32:25,517 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:32:25,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:32:25,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:32:25,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:32:25,520 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:32:25,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:32:25,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:32:25,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:32:25,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:32:25,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:32:25,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:32:25,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:32:25,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:32:25,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:32:25,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:32:25,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:32:25,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:32:25,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:32:25,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:32:25,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:32:25,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:32:25,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:32:25,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:32:25,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:32:25,525 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:32:25,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:32:25,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:32:25,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:32:25,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:32:25,963 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:32:25,964 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:32:25,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c [2020-12-22 07:32:26,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd351bb1/186acb93956a4f3aaa5e23b83f6f6492/FLAG608a0dc65 [2020-12-22 07:32:26,658 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:32:26,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c [2020-12-22 07:32:26,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd351bb1/186acb93956a4f3aaa5e23b83f6f6492/FLAG608a0dc65 [2020-12-22 07:32:26,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd351bb1/186acb93956a4f3aaa5e23b83f6f6492 [2020-12-22 07:32:26,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:32:26,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:32:26,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:32:26,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:32:26,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:32:26,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:32:26" (1/1) ... [2020-12-22 07:32:27,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476ce1b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27, skipping insertion in model container [2020-12-22 07:32:27,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:32:26" (1/1) ... [2020-12-22 07:32:27,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:32:27,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:32:27,281 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/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c[8246,8259] [2020-12-22 07:32:27,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:32:27,306 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:32:27,352 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/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c[8246,8259] [2020-12-22 07:32:27,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:32:27,374 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:32:27,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27 WrapperNode [2020-12-22 07:32:27,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:32:27,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:32:27,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:32:27,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:32:27,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:32:27,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:32:27,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:32:27,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:32:27,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:32:27,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:32:27,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:32:27,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:32:27,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (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 07:32:27,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:32:27,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:32:27,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:32:27,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:32:28,268 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:32:28,270 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:32:28,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:32:28 BoogieIcfgContainer [2020-12-22 07:32:28,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:32:28,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:32:28,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:32:28,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:32:28,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:32:26" (1/3) ... [2020-12-22 07:32:28,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621348bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:32:28, skipping insertion in model container [2020-12-22 07:32:28,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (2/3) ... [2020-12-22 07:32:28,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621348bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:32:28, skipping insertion in model container [2020-12-22 07:32:28,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:32:28" (3/3) ... [2020-12-22 07:32:28,294 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c [2020-12-22 07:32:28,310 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:32:28,321 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:32:28,368 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:32:28,400 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:32:28,400 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:32:28,400 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:32:28,400 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:32:28,400 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:32:28,401 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:32:28,401 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:32:28,401 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:32:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-12-22 07:32:28,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 07:32:28,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:28,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:28,429 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:28,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1837107710, now seen corresponding path program 1 times [2020-12-22 07:32:28,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:28,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209301500] [2020-12-22 07:32:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:28,741 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 07:32:28,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209301500] [2020-12-22 07:32:28,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:28,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:32:28,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067477931] [2020-12-22 07:32:28,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:32:28,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:28,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:32:28,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:32:28,777 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 2 states. [2020-12-22 07:32:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:28,813 INFO L93 Difference]: Finished difference Result 126 states and 204 transitions. [2020-12-22 07:32:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:32:28,816 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2020-12-22 07:32:28,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:28,828 INFO L225 Difference]: With dead ends: 126 [2020-12-22 07:32:28,828 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 07:32:28,832 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 07:32:28,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 07:32:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-22 07:32:28,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 07:32:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 121 transitions. [2020-12-22 07:32:28,876 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 121 transitions. Word has length 29 [2020-12-22 07:32:28,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:28,877 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 121 transitions. [2020-12-22 07:32:28,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:32:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 121 transitions. [2020-12-22 07:32:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 07:32:28,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:28,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:28,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:32:28,880 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:28,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1971121216, now seen corresponding path program 1 times [2020-12-22 07:32:28,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:28,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197610175] [2020-12-22 07:32:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:28,983 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 07:32:28,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197610175] [2020-12-22 07:32:28,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:28,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:32:28,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312154193] [2020-12-22 07:32:28,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:32:28,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:28,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:32:28,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:32:28,988 INFO L87 Difference]: Start difference. First operand 73 states and 121 transitions. Second operand 5 states. [2020-12-22 07:32:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:29,092 INFO L93 Difference]: Finished difference Result 165 states and 263 transitions. [2020-12-22 07:32:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:29,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-22 07:32:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:29,096 INFO L225 Difference]: With dead ends: 165 [2020-12-22 07:32:29,096 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 07:32:29,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:32:29,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 07:32:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2020-12-22 07:32:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 07:32:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2020-12-22 07:32:29,110 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 29 [2020-12-22 07:32:29,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:29,110 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2020-12-22 07:32:29,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:32:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2020-12-22 07:32:29,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 07:32:29,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:29,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:29,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:32:29,114 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:29,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:29,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1333293339, now seen corresponding path program 1 times [2020-12-22 07:32:29,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:29,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518320409] [2020-12-22 07:32:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:29,275 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 07:32:29,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518320409] [2020-12-22 07:32:29,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:29,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:29,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14653540] [2020-12-22 07:32:29,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:29,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:29,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:29,291 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 3 states. [2020-12-22 07:32:29,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:29,341 INFO L93 Difference]: Finished difference Result 155 states and 226 transitions. [2020-12-22 07:32:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:29,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 07:32:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:29,348 INFO L225 Difference]: With dead ends: 155 [2020-12-22 07:32:29,348 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 07:32:29,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 07:32:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-12-22 07:32:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 07:32:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 155 transitions. [2020-12-22 07:32:29,370 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 155 transitions. Word has length 51 [2020-12-22 07:32:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:29,371 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 155 transitions. [2020-12-22 07:32:29,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 155 transitions. [2020-12-22 07:32:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 07:32:29,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:29,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:29,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:32:29,374 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:29,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:29,375 INFO L82 PathProgramCache]: Analyzing trace with hash -606737519, now seen corresponding path program 1 times [2020-12-22 07:32:29,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:29,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353575868] [2020-12-22 07:32:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:29,514 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 07:32:29,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353575868] [2020-12-22 07:32:29,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:29,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:29,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646074085] [2020-12-22 07:32:29,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:29,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:29,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:29,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:29,518 INFO L87 Difference]: Start difference. First operand 109 states and 155 transitions. Second operand 3 states. [2020-12-22 07:32:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:29,583 INFO L93 Difference]: Finished difference Result 257 states and 387 transitions. [2020-12-22 07:32:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:29,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 07:32:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:29,592 INFO L225 Difference]: With dead ends: 257 [2020-12-22 07:32:29,592 INFO L226 Difference]: Without dead ends: 177 [2020-12-22 07:32:29,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-22 07:32:29,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2020-12-22 07:32:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 07:32:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 258 transitions. [2020-12-22 07:32:29,642 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 258 transitions. Word has length 51 [2020-12-22 07:32:29,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:29,642 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 258 transitions. [2020-12-22 07:32:29,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 258 transitions. [2020-12-22 07:32:29,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 07:32:29,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:29,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:29,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:32:29,652 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:29,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2093945095, now seen corresponding path program 1 times [2020-12-22 07:32:29,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:29,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896985633] [2020-12-22 07:32:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:29,767 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 07:32:29,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896985633] [2020-12-22 07:32:29,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:29,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:29,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762657657] [2020-12-22 07:32:29,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:29,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:29,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:29,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:29,770 INFO L87 Difference]: Start difference. First operand 175 states and 258 transitions. Second operand 3 states. [2020-12-22 07:32:29,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:29,807 INFO L93 Difference]: Finished difference Result 443 states and 676 transitions. [2020-12-22 07:32:29,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:29,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 07:32:29,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:29,810 INFO L225 Difference]: With dead ends: 443 [2020-12-22 07:32:29,810 INFO L226 Difference]: Without dead ends: 297 [2020-12-22 07:32:29,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:29,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-12-22 07:32:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2020-12-22 07:32:29,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-22 07:32:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 442 transitions. [2020-12-22 07:32:29,843 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 442 transitions. Word has length 51 [2020-12-22 07:32:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:29,843 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 442 transitions. [2020-12-22 07:32:29,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 442 transitions. [2020-12-22 07:32:29,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 07:32:29,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:29,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:29,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:32:29,845 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:29,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:29,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1863229059, now seen corresponding path program 1 times [2020-12-22 07:32:29,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:29,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263838148] [2020-12-22 07:32:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:29,992 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 07:32:29,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263838148] [2020-12-22 07:32:29,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:29,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:29,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479824155] [2020-12-22 07:32:29,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:29,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:29,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:29,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:29,995 INFO L87 Difference]: Start difference. First operand 295 states and 442 transitions. Second operand 3 states. [2020-12-22 07:32:30,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:30,059 INFO L93 Difference]: Finished difference Result 779 states and 1188 transitions. [2020-12-22 07:32:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:30,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 07:32:30,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:30,067 INFO L225 Difference]: With dead ends: 779 [2020-12-22 07:32:30,068 INFO L226 Difference]: Without dead ends: 513 [2020-12-22 07:32:30,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2020-12-22 07:32:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 511. [2020-12-22 07:32:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-12-22 07:32:30,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 766 transitions. [2020-12-22 07:32:30,149 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 766 transitions. Word has length 51 [2020-12-22 07:32:30,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:30,151 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 766 transitions. [2020-12-22 07:32:30,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 766 transitions. [2020-12-22 07:32:30,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 07:32:30,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:30,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:30,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:32:30,155 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash -645243661, now seen corresponding path program 1 times [2020-12-22 07:32:30,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:30,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978622417] [2020-12-22 07:32:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:30,291 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 07:32:30,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978622417] [2020-12-22 07:32:30,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:30,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:30,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959857190] [2020-12-22 07:32:30,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:30,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:30,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:30,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:30,297 INFO L87 Difference]: Start difference. First operand 511 states and 766 transitions. Second operand 6 states. [2020-12-22 07:32:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:30,628 INFO L93 Difference]: Finished difference Result 4367 states and 6662 transitions. [2020-12-22 07:32:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:32:30,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-22 07:32:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:30,651 INFO L225 Difference]: With dead ends: 4367 [2020-12-22 07:32:30,651 INFO L226 Difference]: Without dead ends: 3885 [2020-12-22 07:32:30,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:32:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2020-12-22 07:32:30,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 991. [2020-12-22 07:32:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2020-12-22 07:32:30,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1470 transitions. [2020-12-22 07:32:30,744 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1470 transitions. Word has length 51 [2020-12-22 07:32:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:30,745 INFO L481 AbstractCegarLoop]: Abstraction has 991 states and 1470 transitions. [2020-12-22 07:32:30,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:30,745 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1470 transitions. [2020-12-22 07:32:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 07:32:30,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:30,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:30,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:32:30,747 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:30,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1275401347, now seen corresponding path program 1 times [2020-12-22 07:32:30,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:30,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133408280] [2020-12-22 07:32:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:30,819 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 07:32:30,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133408280] [2020-12-22 07:32:30,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:30,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:30,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159110238] [2020-12-22 07:32:30,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:30,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:30,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:30,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:30,824 INFO L87 Difference]: Start difference. First operand 991 states and 1470 transitions. Second operand 3 states. [2020-12-22 07:32:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:30,942 INFO L93 Difference]: Finished difference Result 2483 states and 3664 transitions. [2020-12-22 07:32:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:30,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 07:32:30,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:30,952 INFO L225 Difference]: With dead ends: 2483 [2020-12-22 07:32:30,952 INFO L226 Difference]: Without dead ends: 1521 [2020-12-22 07:32:30,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:30,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2020-12-22 07:32:31,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1519. [2020-12-22 07:32:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1519 states. [2020-12-22 07:32:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2174 transitions. [2020-12-22 07:32:31,056 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2174 transitions. Word has length 53 [2020-12-22 07:32:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:31,056 INFO L481 AbstractCegarLoop]: Abstraction has 1519 states and 2174 transitions. [2020-12-22 07:32:31,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2174 transitions. [2020-12-22 07:32:31,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 07:32:31,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:31,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:31,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:32:31,058 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:31,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:31,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1341894859, now seen corresponding path program 1 times [2020-12-22 07:32:31,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:31,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305549625] [2020-12-22 07:32:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:31,240 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 07:32:31,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305549625] [2020-12-22 07:32:31,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:31,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:31,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115441900] [2020-12-22 07:32:31,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:31,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:31,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:31,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:31,243 INFO L87 Difference]: Start difference. First operand 1519 states and 2174 transitions. Second operand 6 states. [2020-12-22 07:32:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:31,451 INFO L93 Difference]: Finished difference Result 3011 states and 4320 transitions. [2020-12-22 07:32:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:31,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 07:32:31,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:31,460 INFO L225 Difference]: With dead ends: 3011 [2020-12-22 07:32:31,460 INFO L226 Difference]: Without dead ends: 1521 [2020-12-22 07:32:31,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:32:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2020-12-22 07:32:31,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1519. [2020-12-22 07:32:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1519 states. [2020-12-22 07:32:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2158 transitions. [2020-12-22 07:32:31,560 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2158 transitions. Word has length 53 [2020-12-22 07:32:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:31,560 INFO L481 AbstractCegarLoop]: Abstraction has 1519 states and 2158 transitions. [2020-12-22 07:32:31,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2158 transitions. [2020-12-22 07:32:31,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 07:32:31,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:31,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:31,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:32:31,562 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:31,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:31,562 INFO L82 PathProgramCache]: Analyzing trace with hash 932544028, now seen corresponding path program 1 times [2020-12-22 07:32:31,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:31,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776434240] [2020-12-22 07:32:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:31,651 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 07:32:31,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776434240] [2020-12-22 07:32:31,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:31,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:31,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352358946] [2020-12-22 07:32:31,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:31,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:31,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:31,654 INFO L87 Difference]: Start difference. First operand 1519 states and 2158 transitions. Second operand 3 states. [2020-12-22 07:32:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:31,776 INFO L93 Difference]: Finished difference Result 3453 states and 4938 transitions. [2020-12-22 07:32:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:31,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 07:32:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:31,789 INFO L225 Difference]: With dead ends: 3453 [2020-12-22 07:32:31,789 INFO L226 Difference]: Without dead ends: 1963 [2020-12-22 07:32:31,794 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 07:32:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2020-12-22 07:32:31,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1961. [2020-12-22 07:32:31,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1961 states. [2020-12-22 07:32:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2784 transitions. [2020-12-22 07:32:31,924 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2784 transitions. Word has length 54 [2020-12-22 07:32:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:31,925 INFO L481 AbstractCegarLoop]: Abstraction has 1961 states and 2784 transitions. [2020-12-22 07:32:31,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2784 transitions. [2020-12-22 07:32:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 07:32:31,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:31,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:31,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:32:31,926 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:31,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1765655459, now seen corresponding path program 1 times [2020-12-22 07:32:31,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:31,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017097066] [2020-12-22 07:32:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:32,054 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 07:32:32,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017097066] [2020-12-22 07:32:32,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:32,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:32:32,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117472218] [2020-12-22 07:32:32,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:32:32,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:32,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:32:32,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:32:32,057 INFO L87 Difference]: Start difference. First operand 1961 states and 2784 transitions. Second operand 8 states. [2020-12-22 07:32:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:32,408 INFO L93 Difference]: Finished difference Result 3051 states and 4294 transitions. [2020-12-22 07:32:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:32:32,408 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-12-22 07:32:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:32,425 INFO L225 Difference]: With dead ends: 3051 [2020-12-22 07:32:32,426 INFO L226 Difference]: Without dead ends: 3049 [2020-12-22 07:32:32,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:32:32,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2020-12-22 07:32:32,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2009. [2020-12-22 07:32:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2009 states. [2020-12-22 07:32:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2808 transitions. [2020-12-22 07:32:32,591 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2808 transitions. Word has length 54 [2020-12-22 07:32:32,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:32,591 INFO L481 AbstractCegarLoop]: Abstraction has 2009 states and 2808 transitions. [2020-12-22 07:32:32,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:32:32,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2808 transitions. [2020-12-22 07:32:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:32:32,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:32,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:32,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:32:32,594 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:32,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1473223963, now seen corresponding path program 1 times [2020-12-22 07:32:32,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:32,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562017919] [2020-12-22 07:32:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:32:32,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562017919] [2020-12-22 07:32:32,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:32,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:32,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554189918] [2020-12-22 07:32:32,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:32,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:32,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:32,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:32,681 INFO L87 Difference]: Start difference. First operand 2009 states and 2808 transitions. Second operand 6 states. [2020-12-22 07:32:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:33,278 INFO L93 Difference]: Finished difference Result 10459 states and 14637 transitions. [2020-12-22 07:32:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:33,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 07:32:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:33,324 INFO L225 Difference]: With dead ends: 10459 [2020-12-22 07:32:33,324 INFO L226 Difference]: Without dead ends: 8481 [2020-12-22 07:32:33,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:32:33,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8481 states. [2020-12-22 07:32:33,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8481 to 3985. [2020-12-22 07:32:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3985 states. [2020-12-22 07:32:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3985 states to 3985 states and 5552 transitions. [2020-12-22 07:32:33,671 INFO L78 Accepts]: Start accepts. Automaton has 3985 states and 5552 transitions. Word has length 78 [2020-12-22 07:32:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:33,672 INFO L481 AbstractCegarLoop]: Abstraction has 3985 states and 5552 transitions. [2020-12-22 07:32:33,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3985 states and 5552 transitions. [2020-12-22 07:32:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:32:33,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:33,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:33,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:32:33,675 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash -295558853, now seen corresponding path program 1 times [2020-12-22 07:32:33,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:33,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491180692] [2020-12-22 07:32:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:32:33,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491180692] [2020-12-22 07:32:33,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:33,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:33,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13584092] [2020-12-22 07:32:33,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:33,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:33,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:33,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:33,786 INFO L87 Difference]: Start difference. First operand 3985 states and 5552 transitions. Second operand 6 states. [2020-12-22 07:32:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:34,513 INFO L93 Difference]: Finished difference Result 12435 states and 17381 transitions. [2020-12-22 07:32:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:34,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 07:32:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:34,554 INFO L225 Difference]: With dead ends: 12435 [2020-12-22 07:32:34,555 INFO L226 Difference]: Without dead ends: 10457 [2020-12-22 07:32:34,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:32:34,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10457 states. [2020-12-22 07:32:35,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10457 to 6937. [2020-12-22 07:32:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6937 states. [2020-12-22 07:32:35,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6937 states to 6937 states and 9632 transitions. [2020-12-22 07:32:35,127 INFO L78 Accepts]: Start accepts. Automaton has 6937 states and 9632 transitions. Word has length 78 [2020-12-22 07:32:35,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:35,129 INFO L481 AbstractCegarLoop]: Abstraction has 6937 states and 9632 transitions. [2020-12-22 07:32:35,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:35,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6937 states and 9632 transitions. [2020-12-22 07:32:35,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:32:35,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:35,133 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:35,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:32:35,134 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:35,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:35,135 INFO L82 PathProgramCache]: Analyzing trace with hash 836080987, now seen corresponding path program 1 times [2020-12-22 07:32:35,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:35,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183997355] [2020-12-22 07:32:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:32:35,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183997355] [2020-12-22 07:32:35,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:35,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:35,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258243921] [2020-12-22 07:32:35,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:35,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:35,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:35,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:35,237 INFO L87 Difference]: Start difference. First operand 6937 states and 9632 transitions. Second operand 6 states. [2020-12-22 07:32:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:36,004 INFO L93 Difference]: Finished difference Result 14411 states and 20125 transitions. [2020-12-22 07:32:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:36,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 07:32:36,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:36,035 INFO L225 Difference]: With dead ends: 14411 [2020-12-22 07:32:36,035 INFO L226 Difference]: Without dead ends: 12433 [2020-12-22 07:32:36,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:32:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12433 states. [2020-12-22 07:32:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12433 to 8913. [2020-12-22 07:32:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8913 states. [2020-12-22 07:32:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8913 states to 8913 states and 12376 transitions. [2020-12-22 07:32:36,848 INFO L78 Accepts]: Start accepts. Automaton has 8913 states and 12376 transitions. Word has length 78 [2020-12-22 07:32:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:36,848 INFO L481 AbstractCegarLoop]: Abstraction has 8913 states and 12376 transitions. [2020-12-22 07:32:36,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 8913 states and 12376 transitions. [2020-12-22 07:32:36,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:32:36,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:36,852 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:36,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:32:36,852 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:36,854 INFO L82 PathProgramCache]: Analyzing trace with hash -399378053, now seen corresponding path program 1 times [2020-12-22 07:32:36,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:36,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199991810] [2020-12-22 07:32:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:32:36,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199991810] [2020-12-22 07:32:36,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:36,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:36,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468845841] [2020-12-22 07:32:36,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:36,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:36,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:36,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:36,947 INFO L87 Difference]: Start difference. First operand 8913 states and 12376 transitions. Second operand 6 states. [2020-12-22 07:32:37,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:37,808 INFO L93 Difference]: Finished difference Result 15507 states and 21637 transitions. [2020-12-22 07:32:37,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:37,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 07:32:37,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:37,853 INFO L225 Difference]: With dead ends: 15507 [2020-12-22 07:32:37,853 INFO L226 Difference]: Without dead ends: 13969 [2020-12-22 07:32:37,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:32:37,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13969 states. [2020-12-22 07:32:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13969 to 10449. [2020-12-22 07:32:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10449 states. [2020-12-22 07:32:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10449 states to 10449 states and 14512 transitions. [2020-12-22 07:32:38,679 INFO L78 Accepts]: Start accepts. Automaton has 10449 states and 14512 transitions. Word has length 78 [2020-12-22 07:32:38,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:38,680 INFO L481 AbstractCegarLoop]: Abstraction has 10449 states and 14512 transitions. [2020-12-22 07:32:38,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:38,680 INFO L276 IsEmpty]: Start isEmpty. Operand 10449 states and 14512 transitions. [2020-12-22 07:32:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:32:38,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:38,684 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:38,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:32:38,684 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:38,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:38,685 INFO L82 PathProgramCache]: Analyzing trace with hash -32257762, now seen corresponding path program 1 times [2020-12-22 07:32:38,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:38,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606975316] [2020-12-22 07:32:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:38,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606975316] [2020-12-22 07:32:38,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054314518] [2020-12-22 07:32:38,961 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 07:32:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:39,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 07:32:39,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:32:39,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:39,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2020-12-22 07:32:39,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532073134] [2020-12-22 07:32:39,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 07:32:39,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:39,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 07:32:39,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:32:39,462 INFO L87 Difference]: Start difference. First operand 10449 states and 14512 transitions. Second operand 14 states. [2020-12-22 07:32:45,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:45,557 INFO L93 Difference]: Finished difference Result 58157 states and 80368 transitions. [2020-12-22 07:32:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 07:32:45,557 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2020-12-22 07:32:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:45,675 INFO L225 Difference]: With dead ends: 58157 [2020-12-22 07:32:45,677 INFO L226 Difference]: Without dead ends: 49723 [2020-12-22 07:32:45,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=641, Invalid=3019, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 07:32:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49723 states. [2020-12-22 07:32:48,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49723 to 32597. [2020-12-22 07:32:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32597 states. [2020-12-22 07:32:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32597 states to 32597 states and 44808 transitions. [2020-12-22 07:32:48,308 INFO L78 Accepts]: Start accepts. Automaton has 32597 states and 44808 transitions. Word has length 79 [2020-12-22 07:32:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:48,308 INFO L481 AbstractCegarLoop]: Abstraction has 32597 states and 44808 transitions. [2020-12-22 07:32:48,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 07:32:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 32597 states and 44808 transitions. [2020-12-22 07:32:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:32:48,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:48,312 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:48,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 07:32:48,526 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1395542867, now seen corresponding path program 1 times [2020-12-22 07:32:48,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:48,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310952245] [2020-12-22 07:32:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:48,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310952245] [2020-12-22 07:32:48,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567638561] [2020-12-22 07:32:48,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:32:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:48,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:32:48,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:49,051 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:32:49,417 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-22 07:32:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:49,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:49,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:32:49,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274877443] [2020-12-22 07:32:49,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:32:49,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:49,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:32:49,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:32:49,664 INFO L87 Difference]: Start difference. First operand 32597 states and 44808 transitions. Second operand 17 states. [2020-12-22 07:32:57,283 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-12-22 07:32:57,817 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-22 07:32:58,233 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 07:33:02,706 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-12-22 07:33:02,935 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 07:33:38,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:38,479 INFO L93 Difference]: Finished difference Result 563082 states and 770211 transitions. [2020-12-22 07:33:38,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-12-22 07:33:38,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-12-22 07:33:38,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:39,884 INFO L225 Difference]: With dead ends: 563082 [2020-12-22 07:33:39,884 INFO L226 Difference]: Without dead ends: 530516 [2020-12-22 07:33:40,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9771 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3094, Invalid=21398, Unknown=0, NotChecked=0, Total=24492 [2020-12-22 07:33:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530516 states. [2020-12-22 07:33:58,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530516 to 180156. [2020-12-22 07:33:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180156 states. [2020-12-22 07:33:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180156 states to 180156 states and 245522 transitions. [2020-12-22 07:33:59,062 INFO L78 Accepts]: Start accepts. Automaton has 180156 states and 245522 transitions. Word has length 80 [2020-12-22 07:33:59,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:59,062 INFO L481 AbstractCegarLoop]: Abstraction has 180156 states and 245522 transitions. [2020-12-22 07:33:59,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:33:59,063 INFO L276 IsEmpty]: Start isEmpty. Operand 180156 states and 245522 transitions. [2020-12-22 07:33:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:33:59,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:59,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:33:59,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 07:33:59,281 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:59,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:59,282 INFO L82 PathProgramCache]: Analyzing trace with hash 843002779, now seen corresponding path program 1 times [2020-12-22 07:33:59,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:59,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617932286] [2020-12-22 07:33:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:59,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617932286] [2020-12-22 07:33:59,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:59,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:33:59,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107123778] [2020-12-22 07:33:59,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:33:59,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:59,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:33:59,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:59,700 INFO L87 Difference]: Start difference. First operand 180156 states and 245522 transitions. Second operand 3 states. [2020-12-22 07:34:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:14,391 INFO L93 Difference]: Finished difference Result 360283 states and 491014 transitions. [2020-12-22 07:34:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:14,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:34:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:14,871 INFO L225 Difference]: With dead ends: 360283 [2020-12-22 07:34:14,871 INFO L226 Difference]: Without dead ends: 180158 [2020-12-22 07:34:14,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180158 states. [2020-12-22 07:34:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180158 to 176412. [2020-12-22 07:34:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176412 states. [2020-12-22 07:34:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176412 states to 176412 states and 236834 transitions. [2020-12-22 07:34:29,364 INFO L78 Accepts]: Start accepts. Automaton has 176412 states and 236834 transitions. Word has length 80 [2020-12-22 07:34:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:29,365 INFO L481 AbstractCegarLoop]: Abstraction has 176412 states and 236834 transitions. [2020-12-22 07:34:29,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 176412 states and 236834 transitions. [2020-12-22 07:34:29,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:34:29,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:29,372 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:29,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:34:29,372 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:29,373 INFO L82 PathProgramCache]: Analyzing trace with hash 569315067, now seen corresponding path program 1 times [2020-12-22 07:34:29,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:29,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649482510] [2020-12-22 07:34:29,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:29,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649482510] [2020-12-22 07:34:29,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:29,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:29,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100261880] [2020-12-22 07:34:29,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:29,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:29,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:29,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:29,463 INFO L87 Difference]: Start difference. First operand 176412 states and 236834 transitions. Second operand 3 states. [2020-12-22 07:34:37,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:37,416 INFO L93 Difference]: Finished difference Result 275281 states and 369102 transitions. [2020-12-22 07:34:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:37,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:34:37,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:37,572 INFO L225 Difference]: With dead ends: 275281 [2020-12-22 07:34:37,573 INFO L226 Difference]: Without dead ends: 98900 [2020-12-22 07:34:37,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:37,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98900 states. [2020-12-22 07:34:45,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98900 to 95874. [2020-12-22 07:34:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95874 states. [2020-12-22 07:34:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95874 states to 95874 states and 125902 transitions. [2020-12-22 07:34:45,393 INFO L78 Accepts]: Start accepts. Automaton has 95874 states and 125902 transitions. Word has length 80 [2020-12-22 07:34:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:45,393 INFO L481 AbstractCegarLoop]: Abstraction has 95874 states and 125902 transitions. [2020-12-22 07:34:45,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 95874 states and 125902 transitions. [2020-12-22 07:34:45,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:34:45,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:45,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:45,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:34:45,398 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:45,399 INFO L82 PathProgramCache]: Analyzing trace with hash 493150811, now seen corresponding path program 1 times [2020-12-22 07:34:45,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:45,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54985694] [2020-12-22 07:34:45,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:45,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54985694] [2020-12-22 07:34:45,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:45,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:45,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042546813] [2020-12-22 07:34:45,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:45,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:45,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:45,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:45,445 INFO L87 Difference]: Start difference. First operand 95874 states and 125902 transitions. Second operand 3 states. [2020-12-22 07:34:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:49,176 INFO L93 Difference]: Finished difference Result 136348 states and 178589 transitions. [2020-12-22 07:34:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:49,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:34:49,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:49,231 INFO L225 Difference]: With dead ends: 136348 [2020-12-22 07:34:49,232 INFO L226 Difference]: Without dead ends: 40505 [2020-12-22 07:34:49,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40505 states. [2020-12-22 07:34:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40505 to 35973. [2020-12-22 07:34:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35973 states. [2020-12-22 07:34:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35973 states to 35973 states and 46394 transitions. [2020-12-22 07:34:52,444 INFO L78 Accepts]: Start accepts. Automaton has 35973 states and 46394 transitions. Word has length 80 [2020-12-22 07:34:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:52,445 INFO L481 AbstractCegarLoop]: Abstraction has 35973 states and 46394 transitions. [2020-12-22 07:34:52,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 35973 states and 46394 transitions. [2020-12-22 07:34:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:34:52,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:52,448 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:52,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:34:52,448 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:52,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1898265063, now seen corresponding path program 1 times [2020-12-22 07:34:52,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:52,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942634041] [2020-12-22 07:34:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:34:52,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942634041] [2020-12-22 07:34:52,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:52,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:34:52,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497884761] [2020-12-22 07:34:52,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:34:52,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:52,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:34:52,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:34:52,526 INFO L87 Difference]: Start difference. First operand 35973 states and 46394 transitions. Second operand 6 states. [2020-12-22 07:34:54,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:54,579 INFO L93 Difference]: Finished difference Result 55765 states and 72253 transitions. [2020-12-22 07:34:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:34:54,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 07:34:54,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:54,607 INFO L225 Difference]: With dead ends: 55765 [2020-12-22 07:34:54,608 INFO L226 Difference]: Without dead ends: 19916 [2020-12-22 07:34:54,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:34:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19916 states. [2020-12-22 07:34:56,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19916 to 19916. [2020-12-22 07:34:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19916 states. [2020-12-22 07:34:56,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19916 states to 19916 states and 25602 transitions. [2020-12-22 07:34:56,355 INFO L78 Accepts]: Start accepts. Automaton has 19916 states and 25602 transitions. Word has length 80 [2020-12-22 07:34:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:56,355 INFO L481 AbstractCegarLoop]: Abstraction has 19916 states and 25602 transitions. [2020-12-22 07:34:56,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:34:56,355 INFO L276 IsEmpty]: Start isEmpty. Operand 19916 states and 25602 transitions. [2020-12-22 07:34:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:34:56,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:56,356 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:56,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:34:56,357 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:56,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:56,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1398695975, now seen corresponding path program 1 times [2020-12-22 07:34:56,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:56,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772119959] [2020-12-22 07:34:56,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:34:56,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772119959] [2020-12-22 07:34:56,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:56,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:34:56,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232942767] [2020-12-22 07:34:56,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:34:56,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:56,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:34:56,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:34:56,427 INFO L87 Difference]: Start difference. First operand 19916 states and 25602 transitions. Second operand 6 states. [2020-12-22 07:34:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:57,930 INFO L93 Difference]: Finished difference Result 35001 states and 45006 transitions. [2020-12-22 07:34:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:34:57,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 07:34:57,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:58,080 INFO L225 Difference]: With dead ends: 35001 [2020-12-22 07:34:58,080 INFO L226 Difference]: Without dead ends: 15215 [2020-12-22 07:34:58,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:34:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15215 states. [2020-12-22 07:34:59,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15215 to 15215. [2020-12-22 07:34:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15215 states. [2020-12-22 07:34:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15215 states to 15215 states and 19159 transitions. [2020-12-22 07:34:59,484 INFO L78 Accepts]: Start accepts. Automaton has 15215 states and 19159 transitions. Word has length 80 [2020-12-22 07:34:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:59,485 INFO L481 AbstractCegarLoop]: Abstraction has 15215 states and 19159 transitions. [2020-12-22 07:34:59,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:34:59,485 INFO L276 IsEmpty]: Start isEmpty. Operand 15215 states and 19159 transitions. [2020-12-22 07:34:59,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:34:59,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:59,487 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:59,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:34:59,487 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:59,488 INFO L82 PathProgramCache]: Analyzing trace with hash -641948921, now seen corresponding path program 1 times [2020-12-22 07:34:59,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:59,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590485219] [2020-12-22 07:34:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 07:34:59,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590485219] [2020-12-22 07:34:59,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:59,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:34:59,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243888497] [2020-12-22 07:34:59,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:34:59,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:59,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:34:59,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:34:59,568 INFO L87 Difference]: Start difference. First operand 15215 states and 19159 transitions. Second operand 6 states. [2020-12-22 07:35:01,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:01,730 INFO L93 Difference]: Finished difference Result 39349 states and 49855 transitions. [2020-12-22 07:35:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:35:01,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 07:35:01,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:01,757 INFO L225 Difference]: With dead ends: 39349 [2020-12-22 07:35:01,757 INFO L226 Difference]: Without dead ends: 24201 [2020-12-22 07:35:01,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:35:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24201 states. [2020-12-22 07:35:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24201 to 22351. [2020-12-22 07:35:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22351 states. [2020-12-22 07:35:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22351 states to 22351 states and 27957 transitions. [2020-12-22 07:35:03,861 INFO L78 Accepts]: Start accepts. Automaton has 22351 states and 27957 transitions. Word has length 80 [2020-12-22 07:35:03,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:03,862 INFO L481 AbstractCegarLoop]: Abstraction has 22351 states and 27957 transitions. [2020-12-22 07:35:03,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:35:03,862 INFO L276 IsEmpty]: Start isEmpty. Operand 22351 states and 27957 transitions. [2020-12-22 07:35:03,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:35:03,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:03,864 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:03,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:35:03,864 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:03,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1815873684, now seen corresponding path program 1 times [2020-12-22 07:35:03,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:03,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454312922] [2020-12-22 07:35:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:04,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454312922] [2020-12-22 07:35:04,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358491521] [2020-12-22 07:35:04,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 07:35:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:04,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 07:35:04,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:35:04,442 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:35:04,738 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-12-22 07:35:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:05,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:35:05,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2020-12-22 07:35:05,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986331298] [2020-12-22 07:35:05,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 07:35:05,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:05,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 07:35:05,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-12-22 07:35:05,284 INFO L87 Difference]: Start difference. First operand 22351 states and 27957 transitions. Second operand 19 states. [2020-12-22 07:35:05,833 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-12-22 07:35:06,074 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-12-22 07:35:06,358 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-12-22 07:35:06,956 WARN L197 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 120 [2020-12-22 07:35:07,178 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-12-22 07:35:07,584 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-12-22 07:35:07,964 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-12-22 07:35:08,196 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-12-22 07:35:08,580 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-12-22 07:35:08,863 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-12-22 07:35:09,213 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-12-22 07:35:09,660 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-12-22 07:35:10,145 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-12-22 07:35:10,525 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-12-22 07:35:10,845 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-12-22 07:35:11,308 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-12-22 07:35:12,988 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-12-22 07:35:13,321 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-12-22 07:35:13,624 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-12-22 07:35:13,812 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 07:35:14,172 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-12-22 07:35:14,342 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-12-22 07:35:14,557 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 07:35:14,756 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-12-22 07:35:15,211 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-12-22 07:35:15,396 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-12-22 07:35:15,988 WARN L197 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 123 [2020-12-22 07:35:16,275 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-12-22 07:35:16,588 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-12-22 07:35:16,753 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 07:35:17,305 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-12-22 07:35:17,481 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 07:35:17,852 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-12-22 07:35:18,093 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 07:35:18,273 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-12-22 07:35:19,435 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-12-22 07:35:20,084 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-12-22 07:35:20,470 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-12-22 07:35:20,680 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-12-22 07:35:20,868 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 07:35:21,213 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-12-22 07:35:21,380 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-12-22 07:35:21,708 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-12-22 07:35:21,921 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-12-22 07:35:22,266 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 07:35:22,432 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-12-22 07:35:27,790 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 07:35:28,345 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-22 07:35:30,311 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 07:35:30,829 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-22 07:35:33,722 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-12-22 07:35:34,104 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-12-22 07:35:37,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:37,175 INFO L93 Difference]: Finished difference Result 104622 states and 129530 transitions. [2020-12-22 07:35:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 07:35:37,177 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-12-22 07:35:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:37,275 INFO L225 Difference]: With dead ends: 104622 [2020-12-22 07:35:37,276 INFO L226 Difference]: Without dead ends: 83482 [2020-12-22 07:35:37,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=1278, Invalid=5042, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 07:35:37,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83482 states. [2020-12-22 07:35:43,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83482 to 35391. [2020-12-22 07:35:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35391 states. [2020-12-22 07:35:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35391 states to 35391 states and 44462 transitions. [2020-12-22 07:35:43,514 INFO L78 Accepts]: Start accepts. Automaton has 35391 states and 44462 transitions. Word has length 81 [2020-12-22 07:35:43,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:43,515 INFO L481 AbstractCegarLoop]: Abstraction has 35391 states and 44462 transitions. [2020-12-22 07:35:43,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 07:35:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 35391 states and 44462 transitions. [2020-12-22 07:35:43,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:35:43,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:43,516 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:43,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 07:35:43,717 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:43,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:43,718 INFO L82 PathProgramCache]: Analyzing trace with hash -556806320, now seen corresponding path program 1 times [2020-12-22 07:35:43,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:43,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357491801] [2020-12-22 07:35:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:43,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357491801] [2020-12-22 07:35:43,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:43,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:43,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437231163] [2020-12-22 07:35:43,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:43,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:43,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:43,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:43,768 INFO L87 Difference]: Start difference. First operand 35391 states and 44462 transitions. Second operand 3 states. [2020-12-22 07:35:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:47,089 INFO L93 Difference]: Finished difference Result 54053 states and 67660 transitions. [2020-12-22 07:35:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:47,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 07:35:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:47,111 INFO L225 Difference]: With dead ends: 54053 [2020-12-22 07:35:47,112 INFO L226 Difference]: Without dead ends: 20374 [2020-12-22 07:35:47,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20374 states. [2020-12-22 07:35:50,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20374 to 20372. [2020-12-22 07:35:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20372 states. [2020-12-22 07:35:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20372 states to 20372 states and 24814 transitions. [2020-12-22 07:35:50,346 INFO L78 Accepts]: Start accepts. Automaton has 20372 states and 24814 transitions. Word has length 81 [2020-12-22 07:35:50,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:50,346 INFO L481 AbstractCegarLoop]: Abstraction has 20372 states and 24814 transitions. [2020-12-22 07:35:50,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:50,346 INFO L276 IsEmpty]: Start isEmpty. Operand 20372 states and 24814 transitions. [2020-12-22 07:35:50,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:35:50,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:50,347 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:50,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:35:50,348 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:50,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1526645224, now seen corresponding path program 1 times [2020-12-22 07:35:50,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:50,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378483471] [2020-12-22 07:35:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:35:50,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378483471] [2020-12-22 07:35:50,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:50,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:35:50,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565729458] [2020-12-22 07:35:50,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:35:50,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:50,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:35:50,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:35:50,459 INFO L87 Difference]: Start difference. First operand 20372 states and 24814 transitions. Second operand 7 states. [2020-12-22 07:35:55,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:55,636 INFO L93 Difference]: Finished difference Result 50134 states and 61048 transitions. [2020-12-22 07:35:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:35:55,637 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-12-22 07:35:55,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:55,668 INFO L225 Difference]: With dead ends: 50134 [2020-12-22 07:35:55,668 INFO L226 Difference]: Without dead ends: 29929 [2020-12-22 07:35:55,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:35:55,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29929 states. [2020-12-22 07:36:00,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29929 to 29927. [2020-12-22 07:36:00,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29927 states. [2020-12-22 07:36:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29927 states to 29927 states and 36079 transitions. [2020-12-22 07:36:00,548 INFO L78 Accepts]: Start accepts. Automaton has 29927 states and 36079 transitions. Word has length 81 [2020-12-22 07:36:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:00,548 INFO L481 AbstractCegarLoop]: Abstraction has 29927 states and 36079 transitions. [2020-12-22 07:36:00,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:36:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 29927 states and 36079 transitions. [2020-12-22 07:36:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:36:00,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:00,549 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:00,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:36:00,549 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1325300801, now seen corresponding path program 1 times [2020-12-22 07:36:00,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:00,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782768780] [2020-12-22 07:36:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:02,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782768780] [2020-12-22 07:36:02,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649700992] [2020-12-22 07:36:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 07:36:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:02,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 07:36:02,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:36:03,780 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:36:04,263 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-12-22 07:36:04,724 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-12-22 07:36:05,200 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:36:05,481 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 07:36:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:06,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:36:06,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 19] total 46 [2020-12-22 07:36:06,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033115138] [2020-12-22 07:36:06,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 07:36:06,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:06,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 07:36:06,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1935, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 07:36:06,098 INFO L87 Difference]: Start difference. First operand 29927 states and 36079 transitions. Second operand 46 states. [2020-12-22 07:36:06,687 WARN L197 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2020-12-22 07:36:07,659 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-12-22 07:36:07,963 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-12-22 07:36:08,231 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2020-12-22 07:36:08,510 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2020-12-22 07:36:08,783 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2020-12-22 07:36:09,188 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2020-12-22 07:36:09,604 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-12-22 07:36:09,990 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-12-22 07:36:10,363 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-12-22 07:36:10,865 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-12-22 07:36:11,430 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-12-22 07:36:12,060 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2020-12-22 07:36:12,905 WARN L197 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2020-12-22 07:36:13,913 WARN L197 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 95 [2020-12-22 07:36:14,825 WARN L197 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 96 [2020-12-22 07:36:15,572 WARN L197 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-12-22 07:36:16,329 WARN L197 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-12-22 07:36:16,799 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-12-22 07:36:17,431 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-12-22 07:36:17,890 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-12-22 07:36:18,340 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-12-22 07:36:18,990 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-12-22 07:36:19,312 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-12-22 07:36:19,788 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-12-22 07:36:20,324 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-12-22 07:36:20,823 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 07:36:21,440 WARN L197 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-12-22 07:36:22,224 WARN L197 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-12-22 07:36:22,625 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-12-22 07:36:23,158 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-12-22 07:36:23,596 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 07:36:24,174 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-12-22 07:36:24,874 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60