/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/systemc/token_ring.10.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:10:38,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:10:38,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:10:38,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:10:38,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:10:38,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:10:38,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:10:38,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:10:38,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:10:38,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:10:38,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:10:38,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-22 07:10:38,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:10:38,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:10:38,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:10:38,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:10:38,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:10:38,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:10:38,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:10:38,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:10:38,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:10:38,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:10:38,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:10:38,851 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:10:38,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:10:38,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:10:38,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:10:38,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:10:38,907 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:10:38,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:10:38,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:10:38,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:10:38,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:10:38,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:10:38,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:10:38,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:10:38,910 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:10:38,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:10:38,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:10:38,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:10:38,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:10:38,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:10:38,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:10:38,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:10:38,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:10:38,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:10:38,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:10:38,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:10:38,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:10:38,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:10:39,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:10:39,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:10:39,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:10:39,395 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:10:39,396 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:10:39,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.10.cil-2.c [2020-12-22 07:10:39,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28ed8df37/8da7af81e8e94240a17b8177a1e4f0dd/FLAGe8759d9d9 [2020-12-22 07:10:40,254 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:10:40,255 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.10.cil-2.c [2020-12-22 07:10:40,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28ed8df37/8da7af81e8e94240a17b8177a1e4f0dd/FLAGe8759d9d9 [2020-12-22 07:10:40,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28ed8df37/8da7af81e8e94240a17b8177a1e4f0dd [2020-12-22 07:10:40,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:10:40,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:10:40,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:40,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:10:40,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:10:40,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:40" (1/1) ... [2020-12-22 07:10:40,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e7a64bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:40, skipping insertion in model container [2020-12-22 07:10:40,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:40" (1/1) ... [2020-12-22 07:10:40,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:10:40,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:10:40,707 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/systemc/token_ring.10.cil-2.c[366,379] [2020-12-22 07:10:40,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:40,938 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:10:40,954 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/systemc/token_ring.10.cil-2.c[366,379] [2020-12-22 07:10:41,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:41,091 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:10:41,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:41 WrapperNode [2020-12-22 07:10:41,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:41,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:41,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:10:41,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:10:41,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:41" (1/1) ... [2020-12-22 07:10:41,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:41" (1/1) ... [2020-12-22 07:10:41,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:41,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:10:41,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:10:41,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:10:41,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:41" (1/1) ... [2020-12-22 07:10:41,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:41" (1/1) ... [2020-12-22 07:10:41,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:41" (1/1) ... [2020-12-22 07:10:41,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:41" (1/1) ... [2020-12-22 07:10:41,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:41" (1/1) ... [2020-12-22 07:10:41,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:41" (1/1) ... [2020-12-22 07:10:41,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:41" (1/1) ... [2020-12-22 07:10:41,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:10:41,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:10:41,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:10:41,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:10:41,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:10:41,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:10:41,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:10:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:10:41,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:10:44,465 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:10:44,466 INFO L299 CfgBuilder]: Removed 431 assume(true) statements. [2020-12-22 07:10:44,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:44 BoogieIcfgContainer [2020-12-22 07:10:44,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:10:44,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:10:44,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:10:44,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:10:44,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:10:40" (1/3) ... [2020-12-22 07:10:44,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7cfa0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:44, skipping insertion in model container [2020-12-22 07:10:44,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:41" (2/3) ... [2020-12-22 07:10:44,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7cfa0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:44, skipping insertion in model container [2020-12-22 07:10:44,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:44" (3/3) ... [2020-12-22 07:10:44,496 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.10.cil-2.c [2020-12-22 07:10:44,504 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:10:44,510 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:10:44,534 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:10:44,573 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:10:44,573 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:10:44,574 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:10:44,574 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:10:44,574 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:10:44,574 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:10:44,574 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:10:44,574 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:10:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states. [2020-12-22 07:10:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:44,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:44,630 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:44,630 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:44,637 INFO L82 PathProgramCache]: Analyzing trace with hash -734508672, now seen corresponding path program 1 times [2020-12-22 07:10:44,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:44,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488457847] [2020-12-22 07:10:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:44,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488457847] [2020-12-22 07:10:44,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:44,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:44,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120143449] [2020-12-22 07:10:44,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:44,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:44,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:44,976 INFO L87 Difference]: Start difference. First operand 1338 states. Second operand 3 states. [2020-12-22 07:10:45,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:45,146 INFO L93 Difference]: Finished difference Result 2671 states and 4049 transitions. [2020-12-22 07:10:45,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:45,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:45,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:45,191 INFO L225 Difference]: With dead ends: 2671 [2020-12-22 07:10:45,191 INFO L226 Difference]: Without dead ends: 1334 [2020-12-22 07:10:45,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:45,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2020-12-22 07:10:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1334. [2020-12-22 07:10:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1334 states. [2020-12-22 07:10:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1996 transitions. [2020-12-22 07:10:45,366 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1996 transitions. Word has length 138 [2020-12-22 07:10:45,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:45,367 INFO L481 AbstractCegarLoop]: Abstraction has 1334 states and 1996 transitions. [2020-12-22 07:10:45,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1996 transitions. [2020-12-22 07:10:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:45,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:45,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:45,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:10:45,379 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:45,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:45,380 INFO L82 PathProgramCache]: Analyzing trace with hash 882931778, now seen corresponding path program 1 times [2020-12-22 07:10:45,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:45,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346545232] [2020-12-22 07:10:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:45,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346545232] [2020-12-22 07:10:45,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:45,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:45,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073541016] [2020-12-22 07:10:45,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:45,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:45,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:45,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:45,515 INFO L87 Difference]: Start difference. First operand 1334 states and 1996 transitions. Second operand 3 states. [2020-12-22 07:10:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:45,616 INFO L93 Difference]: Finished difference Result 2655 states and 3970 transitions. [2020-12-22 07:10:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:45,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:45,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:45,624 INFO L225 Difference]: With dead ends: 2655 [2020-12-22 07:10:45,625 INFO L226 Difference]: Without dead ends: 1334 [2020-12-22 07:10:45,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2020-12-22 07:10:45,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1334. [2020-12-22 07:10:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1334 states. [2020-12-22 07:10:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1995 transitions. [2020-12-22 07:10:45,697 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1995 transitions. Word has length 138 [2020-12-22 07:10:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:45,699 INFO L481 AbstractCegarLoop]: Abstraction has 1334 states and 1995 transitions. [2020-12-22 07:10:45,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1995 transitions. [2020-12-22 07:10:45,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:45,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:45,703 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:45,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:10:45,704 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:45,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:45,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1312590084, now seen corresponding path program 1 times [2020-12-22 07:10:45,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:45,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276121404] [2020-12-22 07:10:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:45,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276121404] [2020-12-22 07:10:45,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:45,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:45,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263656529] [2020-12-22 07:10:45,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:45,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:45,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:45,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:45,931 INFO L87 Difference]: Start difference. First operand 1334 states and 1995 transitions. Second operand 3 states. [2020-12-22 07:10:46,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:46,116 INFO L93 Difference]: Finished difference Result 3774 states and 5627 transitions. [2020-12-22 07:10:46,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:46,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:46,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:46,135 INFO L225 Difference]: With dead ends: 3774 [2020-12-22 07:10:46,135 INFO L226 Difference]: Without dead ends: 2455 [2020-12-22 07:10:46,140 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 07:10:46,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2020-12-22 07:10:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2453. [2020-12-22 07:10:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3652 transitions. [2020-12-22 07:10:46,321 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3652 transitions. Word has length 138 [2020-12-22 07:10:46,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:46,330 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3652 transitions. [2020-12-22 07:10:46,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3652 transitions. [2020-12-22 07:10:46,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:46,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:46,337 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:46,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:10:46,337 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:46,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2035339326, now seen corresponding path program 1 times [2020-12-22 07:10:46,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:46,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568113756] [2020-12-22 07:10:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:46,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568113756] [2020-12-22 07:10:46,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:46,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:46,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449458884] [2020-12-22 07:10:46,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:46,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:46,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:46,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:46,480 INFO L87 Difference]: Start difference. First operand 2453 states and 3652 transitions. Second operand 4 states. [2020-12-22 07:10:46,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:46,795 INFO L93 Difference]: Finished difference Result 6010 states and 8936 transitions. [2020-12-22 07:10:46,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:46,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:46,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:46,817 INFO L225 Difference]: With dead ends: 6010 [2020-12-22 07:10:46,818 INFO L226 Difference]: Without dead ends: 3573 [2020-12-22 07:10:46,824 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 07:10:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3573 states. [2020-12-22 07:10:46,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3573 to 2453. [2020-12-22 07:10:46,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3649 transitions. [2020-12-22 07:10:46,994 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3649 transitions. Word has length 138 [2020-12-22 07:10:46,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:46,995 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3649 transitions. [2020-12-22 07:10:46,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:46,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3649 transitions. [2020-12-22 07:10:46,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:46,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:46,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:46,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:10:46,998 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:46,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:46,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1173505724, now seen corresponding path program 1 times [2020-12-22 07:10:46,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:46,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468191787] [2020-12-22 07:10:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:47,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468191787] [2020-12-22 07:10:47,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:47,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:47,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480454826] [2020-12-22 07:10:47,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:47,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:47,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:47,153 INFO L87 Difference]: Start difference. First operand 2453 states and 3649 transitions. Second operand 4 states. [2020-12-22 07:10:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:47,457 INFO L93 Difference]: Finished difference Result 6008 states and 8926 transitions. [2020-12-22 07:10:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:47,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:47,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:47,478 INFO L225 Difference]: With dead ends: 6008 [2020-12-22 07:10:47,478 INFO L226 Difference]: Without dead ends: 3572 [2020-12-22 07:10:47,483 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 07:10:47,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2020-12-22 07:10:47,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2453. [2020-12-22 07:10:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:47,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3646 transitions. [2020-12-22 07:10:47,623 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3646 transitions. Word has length 138 [2020-12-22 07:10:47,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:47,624 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3646 transitions. [2020-12-22 07:10:47,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:47,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3646 transitions. [2020-12-22 07:10:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:47,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:47,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:47,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:10:47,626 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1071052674, now seen corresponding path program 1 times [2020-12-22 07:10:47,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:47,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714696106] [2020-12-22 07:10:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:47,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714696106] [2020-12-22 07:10:47,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:47,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:47,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853900100] [2020-12-22 07:10:47,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:47,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:47,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:47,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:47,729 INFO L87 Difference]: Start difference. First operand 2453 states and 3646 transitions. Second operand 4 states. [2020-12-22 07:10:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:48,027 INFO L93 Difference]: Finished difference Result 6006 states and 8916 transitions. [2020-12-22 07:10:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:48,028 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:48,046 INFO L225 Difference]: With dead ends: 6006 [2020-12-22 07:10:48,046 INFO L226 Difference]: Without dead ends: 3571 [2020-12-22 07:10:48,051 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 07:10:48,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3571 states. [2020-12-22 07:10:48,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3571 to 2453. [2020-12-22 07:10:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:48,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3643 transitions. [2020-12-22 07:10:48,209 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3643 transitions. Word has length 138 [2020-12-22 07:10:48,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:48,210 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3643 transitions. [2020-12-22 07:10:48,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:48,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3643 transitions. [2020-12-22 07:10:48,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:48,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:48,212 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:48,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:10:48,213 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:48,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:48,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1559099780, now seen corresponding path program 1 times [2020-12-22 07:10:48,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:48,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541108363] [2020-12-22 07:10:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:48,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541108363] [2020-12-22 07:10:48,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:48,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:48,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538522189] [2020-12-22 07:10:48,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:48,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:48,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:48,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:48,305 INFO L87 Difference]: Start difference. First operand 2453 states and 3643 transitions. Second operand 3 states. [2020-12-22 07:10:48,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:48,457 INFO L93 Difference]: Finished difference Result 4887 states and 7257 transitions. [2020-12-22 07:10:48,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:48,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:48,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:48,501 INFO L225 Difference]: With dead ends: 4887 [2020-12-22 07:10:48,501 INFO L226 Difference]: Without dead ends: 2453 [2020-12-22 07:10:48,506 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 07:10:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2020-12-22 07:10:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2453. [2020-12-22 07:10:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:48,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3635 transitions. [2020-12-22 07:10:48,673 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3635 transitions. Word has length 138 [2020-12-22 07:10:48,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:48,673 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3635 transitions. [2020-12-22 07:10:48,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:48,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3635 transitions. [2020-12-22 07:10:48,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:48,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:48,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:48,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:10:48,676 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:48,677 INFO L82 PathProgramCache]: Analyzing trace with hash 741224192, now seen corresponding path program 1 times [2020-12-22 07:10:48,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:48,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330609716] [2020-12-22 07:10:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:48,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330609716] [2020-12-22 07:10:48,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:48,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:48,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366497691] [2020-12-22 07:10:48,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:48,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:48,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:48,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:48,765 INFO L87 Difference]: Start difference. First operand 2453 states and 3635 transitions. Second operand 3 states. [2020-12-22 07:10:48,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:48,919 INFO L93 Difference]: Finished difference Result 4886 states and 7240 transitions. [2020-12-22 07:10:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:48,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:48,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:48,933 INFO L225 Difference]: With dead ends: 4886 [2020-12-22 07:10:48,933 INFO L226 Difference]: Without dead ends: 2453 [2020-12-22 07:10:48,939 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 07:10:48,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2020-12-22 07:10:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2453. [2020-12-22 07:10:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3627 transitions. [2020-12-22 07:10:49,090 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3627 transitions. Word has length 138 [2020-12-22 07:10:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:49,090 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3627 transitions. [2020-12-22 07:10:49,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3627 transitions. [2020-12-22 07:10:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:49,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:49,093 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:49,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:10:49,093 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:49,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:49,094 INFO L82 PathProgramCache]: Analyzing trace with hash 160651780, now seen corresponding path program 1 times [2020-12-22 07:10:49,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:49,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843725466] [2020-12-22 07:10:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:49,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843725466] [2020-12-22 07:10:49,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:49,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:49,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122141250] [2020-12-22 07:10:49,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:49,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:49,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:49,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:49,185 INFO L87 Difference]: Start difference. First operand 2453 states and 3627 transitions. Second operand 4 states. [2020-12-22 07:10:49,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:49,463 INFO L93 Difference]: Finished difference Result 5998 states and 8860 transitions. [2020-12-22 07:10:49,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:49,464 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:49,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:49,481 INFO L225 Difference]: With dead ends: 5998 [2020-12-22 07:10:49,482 INFO L226 Difference]: Without dead ends: 3567 [2020-12-22 07:10:49,487 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 07:10:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2020-12-22 07:10:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 2453. [2020-12-22 07:10:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3624 transitions. [2020-12-22 07:10:49,638 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3624 transitions. Word has length 138 [2020-12-22 07:10:49,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:49,639 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3624 transitions. [2020-12-22 07:10:49,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3624 transitions. [2020-12-22 07:10:49,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:49,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:49,641 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:49,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:10:49,641 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:49,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:49,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1561350906, now seen corresponding path program 1 times [2020-12-22 07:10:49,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:49,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53282076] [2020-12-22 07:10:49,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:49,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53282076] [2020-12-22 07:10:49,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:49,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:49,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642818707] [2020-12-22 07:10:49,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:49,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:49,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:49,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:49,699 INFO L87 Difference]: Start difference. First operand 2453 states and 3624 transitions. Second operand 4 states. [2020-12-22 07:10:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:49,975 INFO L93 Difference]: Finished difference Result 5996 states and 8850 transitions. [2020-12-22 07:10:49,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:49,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:49,993 INFO L225 Difference]: With dead ends: 5996 [2020-12-22 07:10:49,993 INFO L226 Difference]: Without dead ends: 3566 [2020-12-22 07:10:50,001 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 07:10:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2020-12-22 07:10:50,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 2453. [2020-12-22 07:10:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3621 transitions. [2020-12-22 07:10:50,160 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3621 transitions. Word has length 138 [2020-12-22 07:10:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:50,160 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3621 transitions. [2020-12-22 07:10:50,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3621 transitions. [2020-12-22 07:10:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:50,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:50,162 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:50,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:10:50,163 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:50,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:50,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1893994044, now seen corresponding path program 1 times [2020-12-22 07:10:50,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:50,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762949375] [2020-12-22 07:10:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:50,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762949375] [2020-12-22 07:10:50,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:50,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:50,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775124067] [2020-12-22 07:10:50,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:50,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:50,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:50,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:50,220 INFO L87 Difference]: Start difference. First operand 2453 states and 3621 transitions. Second operand 4 states. [2020-12-22 07:10:50,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:50,506 INFO L93 Difference]: Finished difference Result 5994 states and 8840 transitions. [2020-12-22 07:10:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:50,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:50,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:50,516 INFO L225 Difference]: With dead ends: 5994 [2020-12-22 07:10:50,516 INFO L226 Difference]: Without dead ends: 3565 [2020-12-22 07:10:50,521 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 07:10:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3565 states. [2020-12-22 07:10:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3565 to 2453. [2020-12-22 07:10:50,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3618 transitions. [2020-12-22 07:10:50,682 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3618 transitions. Word has length 138 [2020-12-22 07:10:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:50,683 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3618 transitions. [2020-12-22 07:10:50,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3618 transitions. [2020-12-22 07:10:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:50,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:50,685 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:50,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:10:50,686 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:50,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:50,686 INFO L82 PathProgramCache]: Analyzing trace with hash 34938182, now seen corresponding path program 1 times [2020-12-22 07:10:50,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:50,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977941248] [2020-12-22 07:10:50,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:50,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977941248] [2020-12-22 07:10:50,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:50,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:50,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229527543] [2020-12-22 07:10:50,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:50,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:50,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:50,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:50,749 INFO L87 Difference]: Start difference. First operand 2453 states and 3618 transitions. Second operand 3 states. [2020-12-22 07:10:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:50,944 INFO L93 Difference]: Finished difference Result 4881 states and 7200 transitions. [2020-12-22 07:10:50,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:50,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:50,952 INFO L225 Difference]: With dead ends: 4881 [2020-12-22 07:10:50,952 INFO L226 Difference]: Without dead ends: 2453 [2020-12-22 07:10:50,957 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 07:10:50,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2020-12-22 07:10:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2453. [2020-12-22 07:10:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3610 transitions. [2020-12-22 07:10:51,155 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3610 transitions. Word has length 138 [2020-12-22 07:10:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:51,155 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3610 transitions. [2020-12-22 07:10:51,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3610 transitions. [2020-12-22 07:10:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:51,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:51,158 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:51,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:10:51,158 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:51,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2098864066, now seen corresponding path program 1 times [2020-12-22 07:10:51,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:51,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777504824] [2020-12-22 07:10:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:51,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777504824] [2020-12-22 07:10:51,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:51,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:51,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055989206] [2020-12-22 07:10:51,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:51,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:51,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:51,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:51,236 INFO L87 Difference]: Start difference. First operand 2453 states and 3610 transitions. Second operand 4 states. [2020-12-22 07:10:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:51,609 INFO L93 Difference]: Finished difference Result 5913 states and 8699 transitions. [2020-12-22 07:10:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:51,609 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:51,618 INFO L225 Difference]: With dead ends: 5913 [2020-12-22 07:10:51,618 INFO L226 Difference]: Without dead ends: 3486 [2020-12-22 07:10:51,628 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 07:10:51,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2020-12-22 07:10:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2453. [2020-12-22 07:10:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3607 transitions. [2020-12-22 07:10:51,818 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3607 transitions. Word has length 138 [2020-12-22 07:10:51,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:51,819 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3607 transitions. [2020-12-22 07:10:51,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3607 transitions. [2020-12-22 07:10:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:51,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:51,822 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:51,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:10:51,822 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:51,823 INFO L82 PathProgramCache]: Analyzing trace with hash -468958268, now seen corresponding path program 1 times [2020-12-22 07:10:51,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:51,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332971501] [2020-12-22 07:10:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:51,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332971501] [2020-12-22 07:10:51,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:51,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:51,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658566107] [2020-12-22 07:10:51,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:51,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:51,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:51,904 INFO L87 Difference]: Start difference. First operand 2453 states and 3607 transitions. Second operand 4 states. [2020-12-22 07:10:52,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:52,390 INFO L93 Difference]: Finished difference Result 5911 states and 8689 transitions. [2020-12-22 07:10:52,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:52,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:52,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:52,399 INFO L225 Difference]: With dead ends: 5911 [2020-12-22 07:10:52,400 INFO L226 Difference]: Without dead ends: 3485 [2020-12-22 07:10:52,407 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 07:10:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2020-12-22 07:10:52,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 2453. [2020-12-22 07:10:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3604 transitions. [2020-12-22 07:10:52,625 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3604 transitions. Word has length 138 [2020-12-22 07:10:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:52,627 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3604 transitions. [2020-12-22 07:10:52,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3604 transitions. [2020-12-22 07:10:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:52,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:52,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:52,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:10:52,629 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:52,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:52,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2398082, now seen corresponding path program 1 times [2020-12-22 07:10:52,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:52,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801408214] [2020-12-22 07:10:52,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:52,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801408214] [2020-12-22 07:10:52,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:52,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:52,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495645890] [2020-12-22 07:10:52,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:52,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:52,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:52,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:52,717 INFO L87 Difference]: Start difference. First operand 2453 states and 3604 transitions. Second operand 3 states. [2020-12-22 07:10:52,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:52,928 INFO L93 Difference]: Finished difference Result 4878 states and 7169 transitions. [2020-12-22 07:10:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:52,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:52,934 INFO L225 Difference]: With dead ends: 4878 [2020-12-22 07:10:52,934 INFO L226 Difference]: Without dead ends: 2453 [2020-12-22 07:10:52,940 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 07:10:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2020-12-22 07:10:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2453. [2020-12-22 07:10:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3572 transitions. [2020-12-22 07:10:53,105 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3572 transitions. Word has length 138 [2020-12-22 07:10:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:53,106 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3572 transitions. [2020-12-22 07:10:53,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3572 transitions. [2020-12-22 07:10:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:53,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:53,108 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:53,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:10:53,108 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:53,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:53,109 INFO L82 PathProgramCache]: Analyzing trace with hash 844564102, now seen corresponding path program 1 times [2020-12-22 07:10:53,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:53,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816391490] [2020-12-22 07:10:53,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:53,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816391490] [2020-12-22 07:10:53,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:53,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:53,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833951825] [2020-12-22 07:10:53,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:53,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:53,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:53,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:53,183 INFO L87 Difference]: Start difference. First operand 2453 states and 3572 transitions. Second operand 4 states. [2020-12-22 07:10:53,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:53,618 INFO L93 Difference]: Finished difference Result 5905 states and 8596 transitions. [2020-12-22 07:10:53,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:53,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:53,626 INFO L225 Difference]: With dead ends: 5905 [2020-12-22 07:10:53,627 INFO L226 Difference]: Without dead ends: 3482 [2020-12-22 07:10:53,632 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 07:10:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2020-12-22 07:10:53,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 2453. [2020-12-22 07:10:53,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3569 transitions. [2020-12-22 07:10:53,815 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3569 transitions. Word has length 138 [2020-12-22 07:10:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:53,816 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3569 transitions. [2020-12-22 07:10:53,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3569 transitions. [2020-12-22 07:10:53,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:53,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:53,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:53,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:10:53,818 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:53,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:53,819 INFO L82 PathProgramCache]: Analyzing trace with hash -194020472, now seen corresponding path program 1 times [2020-12-22 07:10:53,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:53,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932653114] [2020-12-22 07:10:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:53,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932653114] [2020-12-22 07:10:53,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:53,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:53,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160534974] [2020-12-22 07:10:53,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:53,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:53,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:53,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:53,893 INFO L87 Difference]: Start difference. First operand 2453 states and 3569 transitions. Second operand 4 states. [2020-12-22 07:10:54,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:54,381 INFO L93 Difference]: Finished difference Result 5903 states and 8586 transitions. [2020-12-22 07:10:54,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:54,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:54,389 INFO L225 Difference]: With dead ends: 5903 [2020-12-22 07:10:54,390 INFO L226 Difference]: Without dead ends: 3481 [2020-12-22 07:10:54,395 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 07:10:54,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2020-12-22 07:10:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 2453. [2020-12-22 07:10:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3566 transitions. [2020-12-22 07:10:54,605 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3566 transitions. Word has length 138 [2020-12-22 07:10:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:54,605 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3566 transitions. [2020-12-22 07:10:54,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3566 transitions. [2020-12-22 07:10:54,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:54,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:54,607 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:54,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:10:54,608 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:54,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:54,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2127781446, now seen corresponding path program 1 times [2020-12-22 07:10:54,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:54,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246180385] [2020-12-22 07:10:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:54,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246180385] [2020-12-22 07:10:54,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:54,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:54,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613330295] [2020-12-22 07:10:54,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:54,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:54,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:54,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:54,665 INFO L87 Difference]: Start difference. First operand 2453 states and 3566 transitions. Second operand 4 states. [2020-12-22 07:10:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:55,100 INFO L93 Difference]: Finished difference Result 5901 states and 8576 transitions. [2020-12-22 07:10:55,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:55,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:55,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:55,111 INFO L225 Difference]: With dead ends: 5901 [2020-12-22 07:10:55,112 INFO L226 Difference]: Without dead ends: 3480 [2020-12-22 07:10:55,115 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 07:10:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2020-12-22 07:10:55,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 2453. [2020-12-22 07:10:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:55,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3563 transitions. [2020-12-22 07:10:55,344 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3563 transitions. Word has length 138 [2020-12-22 07:10:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:55,344 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3563 transitions. [2020-12-22 07:10:55,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3563 transitions. [2020-12-22 07:10:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:55,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:55,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:55,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:10:55,347 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:55,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:55,348 INFO L82 PathProgramCache]: Analyzing trace with hash -14079032, now seen corresponding path program 1 times [2020-12-22 07:10:55,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:55,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602089302] [2020-12-22 07:10:55,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:55,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602089302] [2020-12-22 07:10:55,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:55,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:55,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704400365] [2020-12-22 07:10:55,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:55,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:55,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:55,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:55,459 INFO L87 Difference]: Start difference. First operand 2453 states and 3563 transitions. Second operand 4 states. [2020-12-22 07:10:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:55,869 INFO L93 Difference]: Finished difference Result 5899 states and 8566 transitions. [2020-12-22 07:10:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:55,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:55,877 INFO L225 Difference]: With dead ends: 5899 [2020-12-22 07:10:55,877 INFO L226 Difference]: Without dead ends: 3479 [2020-12-22 07:10:55,881 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 07:10:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2020-12-22 07:10:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 2453. [2020-12-22 07:10:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3560 transitions. [2020-12-22 07:10:56,072 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3560 transitions. Word has length 138 [2020-12-22 07:10:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:56,072 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3560 transitions. [2020-12-22 07:10:56,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:56,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3560 transitions. [2020-12-22 07:10:56,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:56,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:56,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:56,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:10:56,074 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:56,075 INFO L82 PathProgramCache]: Analyzing trace with hash -637360634, now seen corresponding path program 1 times [2020-12-22 07:10:56,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:56,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174991846] [2020-12-22 07:10:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:56,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174991846] [2020-12-22 07:10:56,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:56,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:56,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428376491] [2020-12-22 07:10:56,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:56,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:56,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:56,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:56,132 INFO L87 Difference]: Start difference. First operand 2453 states and 3560 transitions. Second operand 4 states. [2020-12-22 07:10:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:56,560 INFO L93 Difference]: Finished difference Result 5897 states and 8556 transitions. [2020-12-22 07:10:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:56,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:56,568 INFO L225 Difference]: With dead ends: 5897 [2020-12-22 07:10:56,568 INFO L226 Difference]: Without dead ends: 3478 [2020-12-22 07:10:56,573 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 07:10:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2020-12-22 07:10:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2453. [2020-12-22 07:10:56,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3557 transitions. [2020-12-22 07:10:56,817 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3557 transitions. Word has length 138 [2020-12-22 07:10:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:56,817 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3557 transitions. [2020-12-22 07:10:56,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3557 transitions. [2020-12-22 07:10:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:56,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:56,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:56,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:10:56,819 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:56,819 INFO L82 PathProgramCache]: Analyzing trace with hash -518919160, now seen corresponding path program 1 times [2020-12-22 07:10:56,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:56,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877947371] [2020-12-22 07:10:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:56,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877947371] [2020-12-22 07:10:56,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:56,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:56,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603365826] [2020-12-22 07:10:56,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:56,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:56,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:56,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:56,884 INFO L87 Difference]: Start difference. First operand 2453 states and 3557 transitions. Second operand 4 states. [2020-12-22 07:10:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:57,326 INFO L93 Difference]: Finished difference Result 5895 states and 8546 transitions. [2020-12-22 07:10:57,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:57,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:57,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:57,333 INFO L225 Difference]: With dead ends: 5895 [2020-12-22 07:10:57,333 INFO L226 Difference]: Without dead ends: 3477 [2020-12-22 07:10:57,338 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 07:10:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3477 states. [2020-12-22 07:10:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3477 to 2453. [2020-12-22 07:10:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3554 transitions. [2020-12-22 07:10:57,559 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3554 transitions. Word has length 138 [2020-12-22 07:10:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:57,560 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3554 transitions. [2020-12-22 07:10:57,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:57,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3554 transitions. [2020-12-22 07:10:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:57,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:57,562 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:57,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:10:57,563 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:57,563 INFO L82 PathProgramCache]: Analyzing trace with hash 870374854, now seen corresponding path program 1 times [2020-12-22 07:10:57,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:57,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654567117] [2020-12-22 07:10:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:57,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654567117] [2020-12-22 07:10:57,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:57,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:57,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598454509] [2020-12-22 07:10:57,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:57,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:57,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:57,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:57,621 INFO L87 Difference]: Start difference. First operand 2453 states and 3554 transitions. Second operand 4 states. [2020-12-22 07:10:58,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:58,216 INFO L93 Difference]: Finished difference Result 5893 states and 8536 transitions. [2020-12-22 07:10:58,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:58,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:58,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:58,226 INFO L225 Difference]: With dead ends: 5893 [2020-12-22 07:10:58,227 INFO L226 Difference]: Without dead ends: 3476 [2020-12-22 07:10:58,232 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 07:10:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2020-12-22 07:10:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 2453. [2020-12-22 07:10:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-12-22 07:10:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3551 transitions. [2020-12-22 07:10:58,455 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3551 transitions. Word has length 138 [2020-12-22 07:10:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:58,456 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3551 transitions. [2020-12-22 07:10:58,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3551 transitions. [2020-12-22 07:10:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:58,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:58,457 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:58,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:10:58,458 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:58,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1163019192, now seen corresponding path program 1 times [2020-12-22 07:10:58,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:58,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300256469] [2020-12-22 07:10:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:58,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300256469] [2020-12-22 07:10:58,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:58,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:58,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062017396] [2020-12-22 07:10:58,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:58,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:58,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:58,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:58,509 INFO L87 Difference]: Start difference. First operand 2453 states and 3551 transitions. Second operand 3 states. [2020-12-22 07:10:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:59,000 INFO L93 Difference]: Finished difference Result 7154 states and 10347 transitions. [2020-12-22 07:10:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:59,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:59,011 INFO L225 Difference]: With dead ends: 7154 [2020-12-22 07:10:59,011 INFO L226 Difference]: Without dead ends: 4739 [2020-12-22 07:10:59,016 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 07:10:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2020-12-22 07:10:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4589. [2020-12-22 07:10:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4589 states. [2020-12-22 07:10:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4589 states to 4589 states and 6608 transitions. [2020-12-22 07:10:59,419 INFO L78 Accepts]: Start accepts. Automaton has 4589 states and 6608 transitions. Word has length 138 [2020-12-22 07:10:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:59,419 INFO L481 AbstractCegarLoop]: Abstraction has 4589 states and 6608 transitions. [2020-12-22 07:10:59,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:59,419 INFO L276 IsEmpty]: Start isEmpty. Operand 4589 states and 6608 transitions. [2020-12-22 07:10:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:10:59,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:59,424 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:59,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:10:59,425 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:59,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1836148267, now seen corresponding path program 1 times [2020-12-22 07:10:59,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:59,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893700128] [2020-12-22 07:10:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:10:59,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893700128] [2020-12-22 07:10:59,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:59,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:10:59,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988629228] [2020-12-22 07:10:59,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:10:59,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:59,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:10:59,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:59,515 INFO L87 Difference]: Start difference. First operand 4589 states and 6608 transitions. Second operand 5 states. [2020-12-22 07:11:00,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:00,654 INFO L93 Difference]: Finished difference Result 13555 states and 19532 transitions. [2020-12-22 07:11:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:00,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:11:00,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:00,674 INFO L225 Difference]: With dead ends: 13555 [2020-12-22 07:11:00,674 INFO L226 Difference]: Without dead ends: 9008 [2020-12-22 07:11:00,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9008 states. [2020-12-22 07:11:01,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9008 to 4664. [2020-12-22 07:11:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4664 states. [2020-12-22 07:11:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 6659 transitions. [2020-12-22 07:11:01,176 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 6659 transitions. Word has length 225 [2020-12-22 07:11:01,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:01,176 INFO L481 AbstractCegarLoop]: Abstraction has 4664 states and 6659 transitions. [2020-12-22 07:11:01,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:01,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 6659 transitions. [2020-12-22 07:11:01,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:01,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:01,181 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:01,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:11:01,181 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:01,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:01,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1480779943, now seen corresponding path program 1 times [2020-12-22 07:11:01,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:01,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922380823] [2020-12-22 07:11:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:01,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922380823] [2020-12-22 07:11:01,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:01,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:01,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080986490] [2020-12-22 07:11:01,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:01,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:01,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:01,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:01,267 INFO L87 Difference]: Start difference. First operand 4664 states and 6659 transitions. Second operand 4 states. [2020-12-22 07:11:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:02,379 INFO L93 Difference]: Finished difference Result 15835 states and 22567 transitions. [2020-12-22 07:11:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:02,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 07:11:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:02,399 INFO L225 Difference]: With dead ends: 15835 [2020-12-22 07:11:02,400 INFO L226 Difference]: Without dead ends: 11215 [2020-12-22 07:11:02,410 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 07:11:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11215 states. [2020-12-22 07:11:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11215 to 8823. [2020-12-22 07:11:03,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8823 states. [2020-12-22 07:11:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8823 states to 8823 states and 12537 transitions. [2020-12-22 07:11:03,214 INFO L78 Accepts]: Start accepts. Automaton has 8823 states and 12537 transitions. Word has length 225 [2020-12-22 07:11:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:03,215 INFO L481 AbstractCegarLoop]: Abstraction has 8823 states and 12537 transitions. [2020-12-22 07:11:03,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 8823 states and 12537 transitions. [2020-12-22 07:11:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:03,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:03,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:03,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:11:03,223 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:03,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:03,224 INFO L82 PathProgramCache]: Analyzing trace with hash 2035193862, now seen corresponding path program 1 times [2020-12-22 07:11:03,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:03,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014714446] [2020-12-22 07:11:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:03,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014714446] [2020-12-22 07:11:03,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:03,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:03,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854950789] [2020-12-22 07:11:03,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:03,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:03,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:03,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:03,306 INFO L87 Difference]: Start difference. First operand 8823 states and 12537 transitions. Second operand 5 states. [2020-12-22 07:11:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:04,756 INFO L93 Difference]: Finished difference Result 25836 states and 36813 transitions. [2020-12-22 07:11:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:04,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:11:04,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:04,778 INFO L225 Difference]: With dead ends: 25836 [2020-12-22 07:11:04,778 INFO L226 Difference]: Without dead ends: 17061 [2020-12-22 07:11:04,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:04,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17061 states. [2020-12-22 07:11:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17061 to 8967. [2020-12-22 07:11:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8967 states. [2020-12-22 07:11:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8967 states to 8967 states and 12636 transitions. [2020-12-22 07:11:05,614 INFO L78 Accepts]: Start accepts. Automaton has 8967 states and 12636 transitions. Word has length 225 [2020-12-22 07:11:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:05,614 INFO L481 AbstractCegarLoop]: Abstraction has 8967 states and 12636 transitions. [2020-12-22 07:11:05,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:05,615 INFO L276 IsEmpty]: Start isEmpty. Operand 8967 states and 12636 transitions. [2020-12-22 07:11:05,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:05,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:05,622 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:05,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:11:05,622 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:05,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:05,623 INFO L82 PathProgramCache]: Analyzing trace with hash 908240770, now seen corresponding path program 1 times [2020-12-22 07:11:05,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:05,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881822471] [2020-12-22 07:11:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:05,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881822471] [2020-12-22 07:11:05,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:05,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:05,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633609558] [2020-12-22 07:11:05,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:05,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:05,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:05,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:05,717 INFO L87 Difference]: Start difference. First operand 8967 states and 12636 transitions. Second operand 4 states. [2020-12-22 07:11:07,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:07,870 INFO L93 Difference]: Finished difference Result 30530 states and 42959 transitions. [2020-12-22 07:11:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:07,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 07:11:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:07,890 INFO L225 Difference]: With dead ends: 30530 [2020-12-22 07:11:07,891 INFO L226 Difference]: Without dead ends: 21620 [2020-12-22 07:11:07,903 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 07:11:07,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21620 states. [2020-12-22 07:11:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21620 to 17058. [2020-12-22 07:11:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17058 states. [2020-12-22 07:11:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17058 states to 17058 states and 23933 transitions. [2020-12-22 07:11:09,199 INFO L78 Accepts]: Start accepts. Automaton has 17058 states and 23933 transitions. Word has length 225 [2020-12-22 07:11:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:09,199 INFO L481 AbstractCegarLoop]: Abstraction has 17058 states and 23933 transitions. [2020-12-22 07:11:09,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 17058 states and 23933 transitions. [2020-12-22 07:11:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:09,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:09,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:09,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:11:09,211 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:09,211 INFO L82 PathProgramCache]: Analyzing trace with hash 212544865, now seen corresponding path program 1 times [2020-12-22 07:11:09,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:09,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72490544] [2020-12-22 07:11:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:09,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72490544] [2020-12-22 07:11:09,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:09,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:09,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544375586] [2020-12-22 07:11:09,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:09,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:09,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:09,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:09,291 INFO L87 Difference]: Start difference. First operand 17058 states and 23933 transitions. Second operand 5 states. [2020-12-22 07:11:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:12,018 INFO L93 Difference]: Finished difference Result 48759 states and 68789 transitions. [2020-12-22 07:11:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:12,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:11:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:12,051 INFO L225 Difference]: With dead ends: 48759 [2020-12-22 07:11:12,051 INFO L226 Difference]: Without dead ends: 31762 [2020-12-22 07:11:12,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31762 states. [2020-12-22 07:11:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31762 to 17334. [2020-12-22 07:11:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17334 states. [2020-12-22 07:11:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17334 states to 17334 states and 24124 transitions. [2020-12-22 07:11:13,546 INFO L78 Accepts]: Start accepts. Automaton has 17334 states and 24124 transitions. Word has length 225 [2020-12-22 07:11:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:13,546 INFO L481 AbstractCegarLoop]: Abstraction has 17334 states and 24124 transitions. [2020-12-22 07:11:13,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:13,547 INFO L276 IsEmpty]: Start isEmpty. Operand 17334 states and 24124 transitions. [2020-12-22 07:11:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:13,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:13,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:13,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:11:13,554 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:13,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:13,554 INFO L82 PathProgramCache]: Analyzing trace with hash -10643747, now seen corresponding path program 1 times [2020-12-22 07:11:13,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:13,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312470995] [2020-12-22 07:11:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:13,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312470995] [2020-12-22 07:11:13,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:13,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:13,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81274173] [2020-12-22 07:11:13,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:13,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:13,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:13,639 INFO L87 Difference]: Start difference. First operand 17334 states and 24124 transitions. Second operand 5 states. [2020-12-22 07:11:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:17,260 INFO L93 Difference]: Finished difference Result 62039 states and 87084 transitions. [2020-12-22 07:11:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:17,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:11:17,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:17,305 INFO L225 Difference]: With dead ends: 62039 [2020-12-22 07:11:17,305 INFO L226 Difference]: Without dead ends: 44773 [2020-12-22 07:11:17,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44773 states. [2020-12-22 07:11:19,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44773 to 17865. [2020-12-22 07:11:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17865 states. [2020-12-22 07:11:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17865 states to 17865 states and 24655 transitions. [2020-12-22 07:11:19,477 INFO L78 Accepts]: Start accepts. Automaton has 17865 states and 24655 transitions. Word has length 225 [2020-12-22 07:11:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:19,478 INFO L481 AbstractCegarLoop]: Abstraction has 17865 states and 24655 transitions. [2020-12-22 07:11:19,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 17865 states and 24655 transitions. [2020-12-22 07:11:19,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:19,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:19,485 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:19,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:11:19,485 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:19,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:19,486 INFO L82 PathProgramCache]: Analyzing trace with hash -796641637, now seen corresponding path program 1 times [2020-12-22 07:11:19,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:19,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115430758] [2020-12-22 07:11:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:19,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115430758] [2020-12-22 07:11:19,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:19,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:19,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009358005] [2020-12-22 07:11:19,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:19,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:19,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:19,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:19,598 INFO L87 Difference]: Start difference. First operand 17865 states and 24655 transitions. Second operand 4 states. [2020-12-22 07:11:23,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:23,473 INFO L93 Difference]: Finished difference Result 60774 states and 83763 transitions. [2020-12-22 07:11:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:23,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 07:11:23,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:23,515 INFO L225 Difference]: With dead ends: 60774 [2020-12-22 07:11:23,515 INFO L226 Difference]: Without dead ends: 42982 [2020-12-22 07:11:23,542 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 07:11:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42982 states. [2020-12-22 07:11:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42982 to 34056. [2020-12-22 07:11:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34056 states. [2020-12-22 07:11:27,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34056 states to 34056 states and 46808 transitions. [2020-12-22 07:11:27,236 INFO L78 Accepts]: Start accepts. Automaton has 34056 states and 46808 transitions. Word has length 225 [2020-12-22 07:11:27,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:27,236 INFO L481 AbstractCegarLoop]: Abstraction has 34056 states and 46808 transitions. [2020-12-22 07:11:27,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 34056 states and 46808 transitions. [2020-12-22 07:11:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:27,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:27,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:27,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:11:27,248 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:27,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:27,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2144654631, now seen corresponding path program 1 times [2020-12-22 07:11:27,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:27,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819067342] [2020-12-22 07:11:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:27,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819067342] [2020-12-22 07:11:27,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:27,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:27,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64518652] [2020-12-22 07:11:27,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:27,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:27,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:27,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:27,344 INFO L87 Difference]: Start difference. First operand 34056 states and 46808 transitions. Second operand 5 states. [2020-12-22 07:11:33,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:33,165 INFO L93 Difference]: Finished difference Result 94639 states and 131008 transitions. [2020-12-22 07:11:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:33,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:11:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:33,230 INFO L225 Difference]: With dead ends: 94639 [2020-12-22 07:11:33,230 INFO L226 Difference]: Without dead ends: 60660 [2020-12-22 07:11:33,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60660 states. [2020-12-22 07:11:37,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60660 to 34584. [2020-12-22 07:11:37,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34584 states. [2020-12-22 07:11:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34584 states to 34584 states and 47175 transitions. [2020-12-22 07:11:37,141 INFO L78 Accepts]: Start accepts. Automaton has 34584 states and 47175 transitions. Word has length 225 [2020-12-22 07:11:37,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:37,142 INFO L481 AbstractCegarLoop]: Abstraction has 34584 states and 47175 transitions. [2020-12-22 07:11:37,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:37,142 INFO L276 IsEmpty]: Start isEmpty. Operand 34584 states and 47175 transitions. [2020-12-22 07:11:37,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:37,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:37,155 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:37,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:11:37,156 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:37,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:37,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1879904683, now seen corresponding path program 1 times [2020-12-22 07:11:37,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:37,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337019634] [2020-12-22 07:11:37,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:37,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337019634] [2020-12-22 07:11:37,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:37,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:37,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605875994] [2020-12-22 07:11:37,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:37,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:37,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:37,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:37,269 INFO L87 Difference]: Start difference. First operand 34584 states and 47175 transitions. Second operand 5 states. [2020-12-22 07:11:45,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:45,562 INFO L93 Difference]: Finished difference Result 118455 states and 163275 transitions. [2020-12-22 07:11:45,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:45,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:11:45,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:45,653 INFO L225 Difference]: With dead ends: 118455 [2020-12-22 07:11:45,653 INFO L226 Difference]: Without dead ends: 83955 [2020-12-22 07:11:45,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83955 states. [2020-12-22 07:11:50,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83955 to 35595. [2020-12-22 07:11:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35595 states. [2020-12-22 07:11:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35595 states to 35595 states and 48186 transitions. [2020-12-22 07:11:50,095 INFO L78 Accepts]: Start accepts. Automaton has 35595 states and 48186 transitions. Word has length 225 [2020-12-22 07:11:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:50,096 INFO L481 AbstractCegarLoop]: Abstraction has 35595 states and 48186 transitions. [2020-12-22 07:11:50,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:50,096 INFO L276 IsEmpty]: Start isEmpty. Operand 35595 states and 48186 transitions. [2020-12-22 07:11:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:50,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:50,109 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:50,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 07:11:50,109 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:50,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:50,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2144552173, now seen corresponding path program 1 times [2020-12-22 07:11:50,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:50,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072728031] [2020-12-22 07:11:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:50,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072728031] [2020-12-22 07:11:50,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:50,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:50,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284392112] [2020-12-22 07:11:50,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:50,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:50,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:50,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:50,200 INFO L87 Difference]: Start difference. First operand 35595 states and 48186 transitions. Second operand 4 states. [2020-12-22 07:11:59,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:59,544 INFO L93 Difference]: Finished difference Result 120766 states and 163282 transitions. [2020-12-22 07:11:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:59,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 07:11:59,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:59,633 INFO L225 Difference]: With dead ends: 120766 [2020-12-22 07:11:59,633 INFO L226 Difference]: Without dead ends: 85260 [2020-12-22 07:11:59,663 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 07:11:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85260 states. [2020-12-22 07:12:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85260 to 67866. [2020-12-22 07:12:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67866 states. [2020-12-22 07:12:07,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67866 states to 67866 states and 91527 transitions. [2020-12-22 07:12:07,448 INFO L78 Accepts]: Start accepts. Automaton has 67866 states and 91527 transitions. Word has length 225 [2020-12-22 07:12:07,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:07,449 INFO L481 AbstractCegarLoop]: Abstraction has 67866 states and 91527 transitions. [2020-12-22 07:12:07,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 67866 states and 91527 transitions. [2020-12-22 07:12:07,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:12:07,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:07,477 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:07,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 07:12:07,477 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:07,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1902222417, now seen corresponding path program 1 times [2020-12-22 07:12:07,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:07,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976708881] [2020-12-22 07:12:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:12:07,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976708881] [2020-12-22 07:12:07,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:07,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:07,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141213754] [2020-12-22 07:12:07,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:07,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:07,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:07,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:07,574 INFO L87 Difference]: Start difference. First operand 67866 states and 91527 transitions. Second operand 5 states. [2020-12-22 07:12:20,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:20,622 INFO L93 Difference]: Finished difference Result 183563 states and 249455 transitions. [2020-12-22 07:12:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:20,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:12:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:20,762 INFO L225 Difference]: With dead ends: 183563 [2020-12-22 07:12:20,762 INFO L226 Difference]: Without dead ends: 115790 [2020-12-22 07:12:20,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:12:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115790 states. [2020-12-22 07:12:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115790 to 68874. [2020-12-22 07:12:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68874 states. [2020-12-22 07:12:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68874 states to 68874 states and 92230 transitions. [2020-12-22 07:12:29,590 INFO L78 Accepts]: Start accepts. Automaton has 68874 states and 92230 transitions. Word has length 225 [2020-12-22 07:12:29,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:29,590 INFO L481 AbstractCegarLoop]: Abstraction has 68874 states and 92230 transitions. [2020-12-22 07:12:29,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 68874 states and 92230 transitions. [2020-12-22 07:12:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:12:29,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:29,607 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:29,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 07:12:29,607 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:29,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:29,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1609939405, now seen corresponding path program 1 times [2020-12-22 07:12:29,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:29,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543005779] [2020-12-22 07:12:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:12:29,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543005779] [2020-12-22 07:12:29,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:29,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:29,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969565071] [2020-12-22 07:12:29,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:29,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:29,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:29,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:29,685 INFO L87 Difference]: Start difference. First operand 68874 states and 92230 transitions. Second operand 5 states. [2020-12-22 07:12:47,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:47,592 INFO L93 Difference]: Finished difference Result 226207 states and 306174 transitions. [2020-12-22 07:12:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:47,593 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:12:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:47,941 INFO L225 Difference]: With dead ends: 226207 [2020-12-22 07:12:47,941 INFO L226 Difference]: Without dead ends: 157433 [2020-12-22 07:12:47,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:12:48,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157433 states. [2020-12-22 07:12:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157433 to 70797. [2020-12-22 07:12:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70797 states. [2020-12-22 07:12:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70797 states to 70797 states and 94153 transitions. [2020-12-22 07:12:57,489 INFO L78 Accepts]: Start accepts. Automaton has 70797 states and 94153 transitions. Word has length 225 [2020-12-22 07:12:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:57,490 INFO L481 AbstractCegarLoop]: Abstraction has 70797 states and 94153 transitions. [2020-12-22 07:12:57,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 70797 states and 94153 transitions. [2020-12-22 07:12:57,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:12:57,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:57,508 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:57,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-22 07:12:57,508 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:57,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:57,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1633461321, now seen corresponding path program 1 times [2020-12-22 07:12:57,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:57,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879771158] [2020-12-22 07:12:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:12:57,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879771158] [2020-12-22 07:12:57,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:57,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:57,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022160437] [2020-12-22 07:12:57,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:57,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:57,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:57,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:57,776 INFO L87 Difference]: Start difference. First operand 70797 states and 94153 transitions. Second operand 4 states. [2020-12-22 07:13:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:13:18,740 INFO L93 Difference]: Finished difference Result 239298 states and 317841 transitions. [2020-12-22 07:13:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:13:18,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 07:13:18,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:13:18,930 INFO L225 Difference]: With dead ends: 239298 [2020-12-22 07:13:18,930 INFO L226 Difference]: Without dead ends: 168606 [2020-12-22 07:13:19,233 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 07:13:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168606 states.