/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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:25:24,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:25:24,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:25:24,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:25:24,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:25:24,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:25:24,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:25:24,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:25:24,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:25:24,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:25:24,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:25:24,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:25:24,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:25:24,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:25:24,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:25:24,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:25:24,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:25:24,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:25:24,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:25:24,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:25:24,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:25:24,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:25:24,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:25:24,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:25:24,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:25:24,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:25:24,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:25:24,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:25:24,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:25:24,623 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:25:24,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:25:24,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:25:24,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:25:24,626 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:25:24,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:25:24,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:25:24,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:25:24,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:25:24,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:25:24,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:25:24,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:25:24,630 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:25:24,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:25:24,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:25:24,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:25:24,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:25:24,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:25:24,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:25:24,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:25:24,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:25:24,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:25:24,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:25:24,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:25:24,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:25:24,635 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:25:25,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:25:25,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:25:25,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:25:25,108 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:25:25,108 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:25:25,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c [2020-12-22 10:25:25,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d5099c48/cc38ad05054e40ae93a6ebc29dec301d/FLAGb203a105c [2020-12-22 10:25:26,254 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:25:26,255 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c [2020-12-22 10:25:26,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d5099c48/cc38ad05054e40ae93a6ebc29dec301d/FLAGb203a105c [2020-12-22 10:25:26,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d5099c48/cc38ad05054e40ae93a6ebc29dec301d [2020-12-22 10:25:26,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:25:26,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:25:26,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:25:26,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:25:26,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:25:26,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:26" (1/1) ... [2020-12-22 10:25:26,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42bf3bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:26, skipping insertion in model container [2020-12-22 10:25:26,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:26" (1/1) ... [2020-12-22 10:25:26,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:25:26,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:25:27,269 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c[26875,26888] [2020-12-22 10:25:27,317 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c[29449,29462] [2020-12-22 10:25:28,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:25:28,483 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:25:28,550 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c[26875,26888] [2020-12-22 10:25:28,557 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c[29449,29462] [2020-12-22 10:25:29,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:25:29,275 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:25:29,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:29 WrapperNode [2020-12-22 10:25:29,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:25:29,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:25:29,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:25:29,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:25:29,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:29" (1/1) ... [2020-12-22 10:25:29,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:29" (1/1) ... [2020-12-22 10:25:29,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:25:29,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:25:29,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:25:29,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:25:29,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:29" (1/1) ... [2020-12-22 10:25:29,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:29" (1/1) ... [2020-12-22 10:25:30,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:29" (1/1) ... [2020-12-22 10:25:30,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:29" (1/1) ... [2020-12-22 10:25:30,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:29" (1/1) ... [2020-12-22 10:25:30,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:29" (1/1) ... [2020-12-22 10:25:30,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:29" (1/1) ... [2020-12-22 10:25:30,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:25:30,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:25:30,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:25:30,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:25:30,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:29" (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 10:25:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:25:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:25:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:25:30,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:25:36,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:25:36,200 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:25:36,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:25:36 BoogieIcfgContainer [2020-12-22 10:25:36,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:25:36,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:25:36,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:25:36,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:25:36,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:25:26" (1/3) ... [2020-12-22 10:25:36,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46aba2f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:25:36, skipping insertion in model container [2020-12-22 10:25:36,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:29" (2/3) ... [2020-12-22 10:25:36,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46aba2f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:25:36, skipping insertion in model container [2020-12-22 10:25:36,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:25:36" (3/3) ... [2020-12-22 10:25:36,215 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label06.c [2020-12-22 10:25:36,222 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:25:36,228 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:25:36,248 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:25:36,284 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:25:36,284 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:25:36,284 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:25:36,285 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:25:36,285 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:25:36,285 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:25:36,285 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:25:36,285 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:25:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states. [2020-12-22 10:25:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:25:36,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:36,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:25:36,335 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:36,341 INFO L82 PathProgramCache]: Analyzing trace with hash -782344267, now seen corresponding path program 1 times [2020-12-22 10:25:36,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:36,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984586026] [2020-12-22 10:25:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:36,763 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 10:25:36,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984586026] [2020-12-22 10:25:36,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:36,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:25:36,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262284096] [2020-12-22 10:25:36,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:25:36,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:36,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:25:36,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:25:36,788 INFO L87 Difference]: Start difference. First operand 964 states. Second operand 3 states. [2020-12-22 10:25:43,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:43,018 INFO L93 Difference]: Finished difference Result 2614 states and 5016 transitions. [2020-12-22 10:25:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:25:43,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 10:25:43,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:43,060 INFO L225 Difference]: With dead ends: 2614 [2020-12-22 10:25:43,060 INFO L226 Difference]: Without dead ends: 1649 [2020-12-22 10:25:43,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:25:43,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-12-22 10:25:43,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2020-12-22 10:25:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2020-12-22 10:25:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 3029 transitions. [2020-12-22 10:25:43,225 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 3029 transitions. Word has length 24 [2020-12-22 10:25:43,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:43,225 INFO L481 AbstractCegarLoop]: Abstraction has 1649 states and 3029 transitions. [2020-12-22 10:25:43,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:25:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 3029 transitions. [2020-12-22 10:25:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:25:43,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:43,236 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] [2020-12-22 10:25:43,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:25:43,236 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:43,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:43,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2020-12-22 10:25:43,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:43,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966152039] [2020-12-22 10:25:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:43,456 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 10:25:43,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966152039] [2020-12-22 10:25:43,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:43,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:25:43,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940352473] [2020-12-22 10:25:43,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:25:43,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:43,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:25:43,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:25:43,462 INFO L87 Difference]: Start difference. First operand 1649 states and 3029 transitions. Second operand 5 states. [2020-12-22 10:25:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:43,598 INFO L93 Difference]: Finished difference Result 1730 states and 3156 transitions. [2020-12-22 10:25:43,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:25:43,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:25:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:43,609 INFO L225 Difference]: With dead ends: 1730 [2020-12-22 10:25:43,610 INFO L226 Difference]: Without dead ends: 1649 [2020-12-22 10:25:43,612 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 10:25:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-12-22 10:25:43,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2020-12-22 10:25:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2020-12-22 10:25:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2968 transitions. [2020-12-22 10:25:43,661 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2968 transitions. Word has length 46 [2020-12-22 10:25:43,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:43,661 INFO L481 AbstractCegarLoop]: Abstraction has 1649 states and 2968 transitions. [2020-12-22 10:25:43,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:25:43,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2968 transitions. [2020-12-22 10:25:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:25:43,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:43,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:25:43,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:25:43,665 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash 534000670, now seen corresponding path program 1 times [2020-12-22 10:25:43,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:43,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184894849] [2020-12-22 10:25:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:25:43,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184894849] [2020-12-22 10:25:43,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:43,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:25:43,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210103387] [2020-12-22 10:25:43,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:25:43,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:43,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:25:43,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:25:43,920 INFO L87 Difference]: Start difference. First operand 1649 states and 2968 transitions. Second operand 4 states. [2020-12-22 10:25:54,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:54,368 INFO L93 Difference]: Finished difference Result 5406 states and 9858 transitions. [2020-12-22 10:25:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:25:54,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-12-22 10:25:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:54,392 INFO L225 Difference]: With dead ends: 5406 [2020-12-22 10:25:54,393 INFO L226 Difference]: Without dead ends: 3902 [2020-12-22 10:25:54,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:25:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2020-12-22 10:25:54,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3902. [2020-12-22 10:25:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3902 states. [2020-12-22 10:25:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3902 states to 3902 states and 5557 transitions. [2020-12-22 10:25:54,491 INFO L78 Accepts]: Start accepts. Automaton has 3902 states and 5557 transitions. Word has length 93 [2020-12-22 10:25:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:54,491 INFO L481 AbstractCegarLoop]: Abstraction has 3902 states and 5557 transitions. [2020-12-22 10:25:54,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:25:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3902 states and 5557 transitions. [2020-12-22 10:25:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:25:54,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:54,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:25:54,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:25:54,494 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:54,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:54,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1068756867, now seen corresponding path program 1 times [2020-12-22 10:25:54,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:54,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126195076] [2020-12-22 10:25:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:25:54,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126195076] [2020-12-22 10:25:54,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048351644] [2020-12-22 10:25:54,708 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 10:25:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:54,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 10:25:54,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:25:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:25:55,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 10:25:55,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 10:25:55,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328195366] [2020-12-22 10:25:55,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:25:55,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:55,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:25:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:25:55,130 INFO L87 Difference]: Start difference. First operand 3902 states and 5557 transitions. Second operand 3 states. [2020-12-22 10:26:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:01,238 INFO L93 Difference]: Finished difference Result 8410 states and 12940 transitions. [2020-12-22 10:26:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:01,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:26:01,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:01,269 INFO L225 Difference]: With dead ends: 8410 [2020-12-22 10:26:01,269 INFO L226 Difference]: Without dead ends: 5404 [2020-12-22 10:26:01,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:26:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5404 states. [2020-12-22 10:26:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5404 to 5404. [2020-12-22 10:26:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5404 states. [2020-12-22 10:26:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5404 states to 5404 states and 7479 transitions. [2020-12-22 10:26:01,389 INFO L78 Accepts]: Start accepts. Automaton has 5404 states and 7479 transitions. Word has length 95 [2020-12-22 10:26:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:01,389 INFO L481 AbstractCegarLoop]: Abstraction has 5404 states and 7479 transitions. [2020-12-22 10:26:01,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:01,390 INFO L276 IsEmpty]: Start isEmpty. Operand 5404 states and 7479 transitions. [2020-12-22 10:26:01,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:01,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:01,391 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:01,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:26:01,607 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:01,608 INFO L82 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2020-12-22 10:26:01,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:01,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655826160] [2020-12-22 10:26:01,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:01,883 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 10:26:01,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655826160] [2020-12-22 10:26:01,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:01,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:01,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086807084] [2020-12-22 10:26:01,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:01,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:01,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:01,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:01,886 INFO L87 Difference]: Start difference. First operand 5404 states and 7479 transitions. Second operand 3 states. [2020-12-22 10:26:01,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:01,945 INFO L93 Difference]: Finished difference Result 5552 states and 7715 transitions. [2020-12-22 10:26:01,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:01,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:01,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:01,972 INFO L225 Difference]: With dead ends: 5552 [2020-12-22 10:26:01,972 INFO L226 Difference]: Without dead ends: 5475 [2020-12-22 10:26:01,975 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 10:26:01,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2020-12-22 10:26:02,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 5473. [2020-12-22 10:26:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5473 states. [2020-12-22 10:26:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 7590 transitions. [2020-12-22 10:26:02,133 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 7590 transitions. Word has length 106 [2020-12-22 10:26:02,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:02,135 INFO L481 AbstractCegarLoop]: Abstraction has 5473 states and 7590 transitions. [2020-12-22 10:26:02,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:02,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 7590 transitions. [2020-12-22 10:26:02,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:02,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:02,143 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:02,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:26:02,144 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:02,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:02,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2020-12-22 10:26:02,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:02,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829813195] [2020-12-22 10:26:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:02,303 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 10:26:02,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829813195] [2020-12-22 10:26:02,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:02,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:02,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540618586] [2020-12-22 10:26:02,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:02,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:02,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:02,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:02,307 INFO L87 Difference]: Start difference. First operand 5473 states and 7590 transitions. Second operand 3 states. [2020-12-22 10:26:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:02,379 INFO L93 Difference]: Finished difference Result 5753 states and 8038 transitions. [2020-12-22 10:26:02,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:02,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:02,420 INFO L225 Difference]: With dead ends: 5753 [2020-12-22 10:26:02,420 INFO L226 Difference]: Without dead ends: 5607 [2020-12-22 10:26:02,424 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 10:26:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2020-12-22 10:26:02,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 5605. [2020-12-22 10:26:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5605 states. [2020-12-22 10:26:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 7801 transitions. [2020-12-22 10:26:02,592 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 7801 transitions. Word has length 106 [2020-12-22 10:26:02,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:02,595 INFO L481 AbstractCegarLoop]: Abstraction has 5605 states and 7801 transitions. [2020-12-22 10:26:02,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 7801 transitions. [2020-12-22 10:26:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:02,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:02,598 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:02,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:26:02,606 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:02,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:02,607 INFO L82 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2020-12-22 10:26:02,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:02,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039413010] [2020-12-22 10:26:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:02,735 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 10:26:02,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039413010] [2020-12-22 10:26:02,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:02,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:02,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168452964] [2020-12-22 10:26:02,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:02,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:02,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:02,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:02,739 INFO L87 Difference]: Start difference. First operand 5605 states and 7801 transitions. Second operand 3 states. [2020-12-22 10:26:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:02,812 INFO L93 Difference]: Finished difference Result 6137 states and 8651 transitions. [2020-12-22 10:26:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:02,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:02,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:02,841 INFO L225 Difference]: With dead ends: 6137 [2020-12-22 10:26:02,841 INFO L226 Difference]: Without dead ends: 5859 [2020-12-22 10:26:02,846 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 10:26:02,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5859 states. [2020-12-22 10:26:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5859 to 5857. [2020-12-22 10:26:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5857 states. [2020-12-22 10:26:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5857 states to 5857 states and 8201 transitions. [2020-12-22 10:26:03,011 INFO L78 Accepts]: Start accepts. Automaton has 5857 states and 8201 transitions. Word has length 106 [2020-12-22 10:26:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:03,012 INFO L481 AbstractCegarLoop]: Abstraction has 5857 states and 8201 transitions. [2020-12-22 10:26:03,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 5857 states and 8201 transitions. [2020-12-22 10:26:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:03,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:03,014 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:03,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:26:03,015 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:03,015 INFO L82 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2020-12-22 10:26:03,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:03,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217053875] [2020-12-22 10:26:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:03,126 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 10:26:03,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217053875] [2020-12-22 10:26:03,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:03,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:03,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359925101] [2020-12-22 10:26:03,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:03,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:03,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:03,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:03,130 INFO L87 Difference]: Start difference. First operand 5857 states and 8201 transitions. Second operand 3 states. [2020-12-22 10:26:03,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:03,218 INFO L93 Difference]: Finished difference Result 6869 states and 9811 transitions. [2020-12-22 10:26:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:03,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:03,232 INFO L225 Difference]: With dead ends: 6869 [2020-12-22 10:26:03,232 INFO L226 Difference]: Without dead ends: 6339 [2020-12-22 10:26:03,240 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 10:26:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6339 states. [2020-12-22 10:26:03,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6339 to 6337. [2020-12-22 10:26:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6337 states. [2020-12-22 10:26:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6337 states to 6337 states and 8957 transitions. [2020-12-22 10:26:03,374 INFO L78 Accepts]: Start accepts. Automaton has 6337 states and 8957 transitions. Word has length 106 [2020-12-22 10:26:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:03,375 INFO L481 AbstractCegarLoop]: Abstraction has 6337 states and 8957 transitions. [2020-12-22 10:26:03,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:03,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6337 states and 8957 transitions. [2020-12-22 10:26:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:03,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:03,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:03,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:26:03,377 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:03,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2020-12-22 10:26:03,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:03,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18446255] [2020-12-22 10:26:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:03,464 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 10:26:03,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18446255] [2020-12-22 10:26:03,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:03,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:03,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445768573] [2020-12-22 10:26:03,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:03,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:03,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:03,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:03,467 INFO L87 Difference]: Start difference. First operand 6337 states and 8957 transitions. Second operand 3 states. [2020-12-22 10:26:03,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:03,577 INFO L93 Difference]: Finished difference Result 8261 states and 11999 transitions. [2020-12-22 10:26:03,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:03,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:03,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:03,594 INFO L225 Difference]: With dead ends: 8261 [2020-12-22 10:26:03,594 INFO L226 Difference]: Without dead ends: 7251 [2020-12-22 10:26:03,600 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 10:26:03,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7251 states. [2020-12-22 10:26:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7251 to 7249. [2020-12-22 10:26:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7249 states. [2020-12-22 10:26:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 10381 transitions. [2020-12-22 10:26:03,839 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 10381 transitions. Word has length 106 [2020-12-22 10:26:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:03,840 INFO L481 AbstractCegarLoop]: Abstraction has 7249 states and 10381 transitions. [2020-12-22 10:26:03,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 10381 transitions. [2020-12-22 10:26:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:03,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:03,843 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:03,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:26:03,844 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:03,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:03,845 INFO L82 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2020-12-22 10:26:03,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:03,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954643740] [2020-12-22 10:26:03,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:03,984 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 10:26:03,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954643740] [2020-12-22 10:26:03,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:03,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:03,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091455428] [2020-12-22 10:26:03,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:03,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:03,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:03,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:03,988 INFO L87 Difference]: Start difference. First operand 7249 states and 10381 transitions. Second operand 3 states. [2020-12-22 10:26:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:04,220 INFO L93 Difference]: Finished difference Result 10901 states and 16111 transitions. [2020-12-22 10:26:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:04,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:04,245 INFO L225 Difference]: With dead ends: 10901 [2020-12-22 10:26:04,246 INFO L226 Difference]: Without dead ends: 8979 [2020-12-22 10:26:04,252 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 10:26:04,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8979 states. [2020-12-22 10:26:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8979 to 8977. [2020-12-22 10:26:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8977 states. [2020-12-22 10:26:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8977 states to 8977 states and 13053 transitions. [2020-12-22 10:26:04,531 INFO L78 Accepts]: Start accepts. Automaton has 8977 states and 13053 transitions. Word has length 106 [2020-12-22 10:26:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:04,531 INFO L481 AbstractCegarLoop]: Abstraction has 8977 states and 13053 transitions. [2020-12-22 10:26:04,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:04,531 INFO L276 IsEmpty]: Start isEmpty. Operand 8977 states and 13053 transitions. [2020-12-22 10:26:04,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:04,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:04,533 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:04,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:26:04,533 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:04,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:04,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2020-12-22 10:26:04,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:04,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183320759] [2020-12-22 10:26:04,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:04,632 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 10:26:04,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183320759] [2020-12-22 10:26:04,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:04,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:04,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242097051] [2020-12-22 10:26:04,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:04,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:04,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:04,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:04,636 INFO L87 Difference]: Start difference. First operand 8977 states and 13053 transitions. Second operand 3 states. [2020-12-22 10:26:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:04,954 INFO L93 Difference]: Finished difference Result 15893 states and 23807 transitions. [2020-12-22 10:26:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:04,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:04,981 INFO L225 Difference]: With dead ends: 15893 [2020-12-22 10:26:04,982 INFO L226 Difference]: Without dead ends: 12243 [2020-12-22 10:26:04,991 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 10:26:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12243 states. [2020-12-22 10:26:05,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12243 to 12241. [2020-12-22 10:26:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12241 states. [2020-12-22 10:26:05,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12241 states to 12241 states and 18045 transitions. [2020-12-22 10:26:05,477 INFO L78 Accepts]: Start accepts. Automaton has 12241 states and 18045 transitions. Word has length 106 [2020-12-22 10:26:05,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:05,477 INFO L481 AbstractCegarLoop]: Abstraction has 12241 states and 18045 transitions. [2020-12-22 10:26:05,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:05,477 INFO L276 IsEmpty]: Start isEmpty. Operand 12241 states and 18045 transitions. [2020-12-22 10:26:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:05,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:05,479 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:05,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:26:05,480 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:05,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2020-12-22 10:26:05,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:05,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533822724] [2020-12-22 10:26:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:05,667 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 10:26:05,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533822724] [2020-12-22 10:26:05,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:05,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:05,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012087442] [2020-12-22 10:26:05,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:05,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:05,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:05,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:05,671 INFO L87 Difference]: Start difference. First operand 12241 states and 18045 transitions. Second operand 10 states. [2020-12-22 10:26:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:09,661 INFO L93 Difference]: Finished difference Result 122865 states and 189069 transitions. [2020-12-22 10:26:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:26:09,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:26:09,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:09,956 INFO L225 Difference]: With dead ends: 122865 [2020-12-22 10:26:09,956 INFO L226 Difference]: Without dead ends: 115951 [2020-12-22 10:26:10,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:26:10,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115951 states. [2020-12-22 10:26:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115951 to 19153. [2020-12-22 10:26:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19153 states. [2020-12-22 10:26:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19153 states to 19153 states and 28477 transitions. [2020-12-22 10:26:12,381 INFO L78 Accepts]: Start accepts. Automaton has 19153 states and 28477 transitions. Word has length 106 [2020-12-22 10:26:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:12,382 INFO L481 AbstractCegarLoop]: Abstraction has 19153 states and 28477 transitions. [2020-12-22 10:26:12,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 19153 states and 28477 transitions. [2020-12-22 10:26:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:12,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:12,384 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:12,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:26:12,384 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:12,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2020-12-22 10:26:12,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:12,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330315109] [2020-12-22 10:26:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:12,501 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 10:26:12,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330315109] [2020-12-22 10:26:12,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:12,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:12,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041839872] [2020-12-22 10:26:12,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:12,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:12,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:12,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:12,509 INFO L87 Difference]: Start difference. First operand 19153 states and 28477 transitions. Second operand 3 states. [2020-12-22 10:26:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:13,922 INFO L93 Difference]: Finished difference Result 45397 states and 68287 transitions. [2020-12-22 10:26:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:13,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:13,988 INFO L225 Difference]: With dead ends: 45397 [2020-12-22 10:26:13,989 INFO L226 Difference]: Without dead ends: 31571 [2020-12-22 10:26:14,008 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 10:26:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31571 states. [2020-12-22 10:26:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31571 to 31313. [2020-12-22 10:26:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31313 states. [2020-12-22 10:26:15,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31313 states to 31313 states and 46269 transitions. [2020-12-22 10:26:15,881 INFO L78 Accepts]: Start accepts. Automaton has 31313 states and 46269 transitions. Word has length 108 [2020-12-22 10:26:15,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:15,881 INFO L481 AbstractCegarLoop]: Abstraction has 31313 states and 46269 transitions. [2020-12-22 10:26:15,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:15,881 INFO L276 IsEmpty]: Start isEmpty. Operand 31313 states and 46269 transitions. [2020-12-22 10:26:15,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:15,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:15,883 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:15,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:26:15,884 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:15,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:15,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2020-12-22 10:26:15,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:15,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630113338] [2020-12-22 10:26:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:16,333 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 10:26:16,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630113338] [2020-12-22 10:26:16,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:16,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:16,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413256615] [2020-12-22 10:26:16,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:16,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:16,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:16,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:16,336 INFO L87 Difference]: Start difference. First operand 31313 states and 46269 transitions. Second operand 10 states. [2020-12-22 10:26:16,755 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 10:26:16,901 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 10:26:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:18,661 INFO L93 Difference]: Finished difference Result 57301 states and 85183 transitions. [2020-12-22 10:26:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:18,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:26:18,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:18,717 INFO L225 Difference]: With dead ends: 57301 [2020-12-22 10:26:18,717 INFO L226 Difference]: Without dead ends: 31315 [2020-12-22 10:26:18,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:26:18,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31315 states. [2020-12-22 10:26:20,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31315 to 31313. [2020-12-22 10:26:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31313 states. [2020-12-22 10:26:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31313 states to 31313 states and 46013 transitions. [2020-12-22 10:26:20,558 INFO L78 Accepts]: Start accepts. Automaton has 31313 states and 46013 transitions. Word has length 108 [2020-12-22 10:26:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:20,559 INFO L481 AbstractCegarLoop]: Abstraction has 31313 states and 46013 transitions. [2020-12-22 10:26:20,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 31313 states and 46013 transitions. [2020-12-22 10:26:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:26:20,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:20,561 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:20,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:26:20,561 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:20,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:20,562 INFO L82 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2020-12-22 10:26:20,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:20,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974433974] [2020-12-22 10:26:20,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:20,762 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 10:26:20,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974433974] [2020-12-22 10:26:20,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:20,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:26:20,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141323948] [2020-12-22 10:26:20,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:26:20,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:20,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:26:20,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:26:20,768 INFO L87 Difference]: Start difference. First operand 31313 states and 46013 transitions. Second operand 6 states. [2020-12-22 10:26:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:22,839 INFO L93 Difference]: Finished difference Result 57299 states and 84670 transitions. [2020-12-22 10:26:22,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:26:22,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-12-22 10:26:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:22,886 INFO L225 Difference]: With dead ends: 57299 [2020-12-22 10:26:22,886 INFO L226 Difference]: Without dead ends: 31313 [2020-12-22 10:26:22,912 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 10:26:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31313 states. [2020-12-22 10:26:24,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31313 to 31313. [2020-12-22 10:26:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31313 states. [2020-12-22 10:26:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31313 states to 31313 states and 45757 transitions. [2020-12-22 10:26:24,880 INFO L78 Accepts]: Start accepts. Automaton has 31313 states and 45757 transitions. Word has length 109 [2020-12-22 10:26:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:24,881 INFO L481 AbstractCegarLoop]: Abstraction has 31313 states and 45757 transitions. [2020-12-22 10:26:24,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:26:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 31313 states and 45757 transitions. [2020-12-22 10:26:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:26:24,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:24,884 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:24,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:26:24,884 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:24,885 INFO L82 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2020-12-22 10:26:24,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:24,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445133190] [2020-12-22 10:26:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:25,050 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 10:26:25,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445133190] [2020-12-22 10:26:25,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:25,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:26:25,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190192360] [2020-12-22 10:26:25,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:26:25,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:25,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:26:25,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:26:25,054 INFO L87 Difference]: Start difference. First operand 31313 states and 45757 transitions. Second operand 8 states. [2020-12-22 10:26:28,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:28,395 INFO L93 Difference]: Finished difference Result 50683 states and 73970 transitions. [2020-12-22 10:26:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:28,396 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:26:28,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:28,444 INFO L225 Difference]: With dead ends: 50683 [2020-12-22 10:26:28,445 INFO L226 Difference]: Without dead ends: 50681 [2020-12-22 10:26:28,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:26:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50681 states. [2020-12-22 10:26:30,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50681 to 32081. [2020-12-22 10:26:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32081 states. [2020-12-22 10:26:30,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32081 states to 32081 states and 46397 transitions. [2020-12-22 10:26:30,769 INFO L78 Accepts]: Start accepts. Automaton has 32081 states and 46397 transitions. Word has length 109 [2020-12-22 10:26:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:30,770 INFO L481 AbstractCegarLoop]: Abstraction has 32081 states and 46397 transitions. [2020-12-22 10:26:30,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:26:30,770 INFO L276 IsEmpty]: Start isEmpty. Operand 32081 states and 46397 transitions. [2020-12-22 10:26:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 10:26:30,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:30,771 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:30,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:26:30,772 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:30,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:30,772 INFO L82 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2020-12-22 10:26:30,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:30,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132263820] [2020-12-22 10:26:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:30,867 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 10:26:30,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132263820] [2020-12-22 10:26:30,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:30,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:30,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686497493] [2020-12-22 10:26:30,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:30,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:30,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:30,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:30,870 INFO L87 Difference]: Start difference. First operand 32081 states and 46397 transitions. Second operand 3 states. [2020-12-22 10:26:33,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:34,000 INFO L93 Difference]: Finished difference Result 59224 states and 86339 transitions. [2020-12-22 10:26:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:34,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 10:26:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:34,173 INFO L225 Difference]: With dead ends: 59224 [2020-12-22 10:26:34,174 INFO L226 Difference]: Without dead ends: 44629 [2020-12-22 10:26:34,191 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 10:26:34,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44629 states. [2020-12-22 10:26:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44629 to 44627. [2020-12-22 10:26:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44627 states. [2020-12-22 10:26:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44627 states to 44627 states and 64447 transitions. [2020-12-22 10:26:37,343 INFO L78 Accepts]: Start accepts. Automaton has 44627 states and 64447 transitions. Word has length 110 [2020-12-22 10:26:37,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:37,344 INFO L481 AbstractCegarLoop]: Abstraction has 44627 states and 64447 transitions. [2020-12-22 10:26:37,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 44627 states and 64447 transitions. [2020-12-22 10:26:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:26:37,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:37,370 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:37,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:26:37,371 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:37,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:37,371 INFO L82 PathProgramCache]: Analyzing trace with hash 45078639, now seen corresponding path program 1 times [2020-12-22 10:26:37,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:37,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095220938] [2020-12-22 10:26:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:26:37,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095220938] [2020-12-22 10:26:37,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:37,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:37,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282530854] [2020-12-22 10:26:37,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:37,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:37,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:37,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:37,601 INFO L87 Difference]: Start difference. First operand 44627 states and 64447 transitions. Second operand 10 states. [2020-12-22 10:26:59,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:59,903 INFO L93 Difference]: Finished difference Result 366565 states and 531784 transitions. [2020-12-22 10:26:59,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:59,904 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:26:59,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:00,468 INFO L225 Difference]: With dead ends: 366565 [2020-12-22 10:27:00,468 INFO L226 Difference]: Without dead ends: 327267 [2020-12-22 10:27:00,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:27:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327267 states. [2020-12-22 10:27:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327267 to 83923. [2020-12-22 10:27:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83923 states. [2020-12-22 10:27:08,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83923 states to 83923 states and 121151 transitions. [2020-12-22 10:27:08,973 INFO L78 Accepts]: Start accepts. Automaton has 83923 states and 121151 transitions. Word has length 148 [2020-12-22 10:27:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:08,979 INFO L481 AbstractCegarLoop]: Abstraction has 83923 states and 121151 transitions. [2020-12-22 10:27:08,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:08,979 INFO L276 IsEmpty]: Start isEmpty. Operand 83923 states and 121151 transitions. [2020-12-22 10:27:09,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:09,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:09,011 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:27:09,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:27:09,011 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:09,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:09,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1723704177, now seen corresponding path program 1 times [2020-12-22 10:27:09,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:09,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719730789] [2020-12-22 10:27:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:27:09,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719730789] [2020-12-22 10:27:09,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:09,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:09,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584665562] [2020-12-22 10:27:09,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:09,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:09,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:09,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:09,385 INFO L87 Difference]: Start difference. First operand 83923 states and 121151 transitions. Second operand 10 states. [2020-12-22 10:27:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:35,976 INFO L93 Difference]: Finished difference Result 405861 states and 588488 transitions. [2020-12-22 10:27:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:35,977 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:27:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:36,799 INFO L225 Difference]: With dead ends: 405861 [2020-12-22 10:27:36,800 INFO L226 Difference]: Without dead ends: 366563 [2020-12-22 10:27:36,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:27:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366563 states. [2020-12-22 10:27:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366563 to 142931. [2020-12-22 10:27:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142931 states. [2020-12-22 10:27:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142931 states to 142931 states and 205887 transitions. [2020-12-22 10:27:50,429 INFO L78 Accepts]: Start accepts. Automaton has 142931 states and 205887 transitions. Word has length 148 [2020-12-22 10:27:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:50,430 INFO L481 AbstractCegarLoop]: Abstraction has 142931 states and 205887 transitions. [2020-12-22 10:27:50,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand 142931 states and 205887 transitions. [2020-12-22 10:27:50,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:50,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:50,464 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:27:50,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:27:50,465 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:50,465 INFO L82 PathProgramCache]: Analyzing trace with hash -592064337, now seen corresponding path program 1 times [2020-12-22 10:27:50,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:50,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519305477] [2020-12-22 10:27:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:27:51,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519305477] [2020-12-22 10:27:51,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:51,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:51,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953224038] [2020-12-22 10:27:51,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:51,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:51,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:51,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:51,082 INFO L87 Difference]: Start difference. First operand 142931 states and 205887 transitions. Second operand 10 states. [2020-12-22 10:28:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:22,780 INFO L93 Difference]: Finished difference Result 445157 states and 645192 transitions. [2020-12-22 10:28:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:22,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:28:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:23,471 INFO L225 Difference]: With dead ends: 445157 [2020-12-22 10:28:23,479 INFO L226 Difference]: Without dead ends: 405859 [2020-12-22 10:28:23,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405859 states. [2020-12-22 10:28:40,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405859 to 182227. [2020-12-22 10:28:40,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182227 states. [2020-12-22 10:28:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182227 states to 182227 states and 262591 transitions. [2020-12-22 10:28:41,482 INFO L78 Accepts]: Start accepts. Automaton has 182227 states and 262591 transitions. Word has length 148 [2020-12-22 10:28:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:41,483 INFO L481 AbstractCegarLoop]: Abstraction has 182227 states and 262591 transitions. [2020-12-22 10:28:41,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:28:41,483 INFO L276 IsEmpty]: Start isEmpty. Operand 182227 states and 262591 transitions. [2020-12-22 10:28:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:28:41,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:41,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:41,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:28:41,504 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:41,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1827523377, now seen corresponding path program 1 times [2020-12-22 10:28:41,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:41,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039897660] [2020-12-22 10:28:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:28:41,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039897660] [2020-12-22 10:28:41,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:41,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:28:41,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061617478] [2020-12-22 10:28:41,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:28:41,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:41,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:28:41,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:28:41,720 INFO L87 Difference]: Start difference. First operand 182227 states and 262591 transitions. Second operand 10 states.