/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.05.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:08:28,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:08:28,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:08:28,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:08:28,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:08:28,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:08:28,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:08:28,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:08:28,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:08:28,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:08:28,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:08:28,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:08:28,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:08:28,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:08:28,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:08:28,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:08:28,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:08:28,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:08:28,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:08:28,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:08:28,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:08:28,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:08:28,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:08:28,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:08:28,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:08:28,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:08:28,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:08:28,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:08:28,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:08:28,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:08:28,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:08:28,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:08:28,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:08:28,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:08:28,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:08:28,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:08:28,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:08:28,495 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:08:28,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:08:28,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:08:28,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:08:28,498 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:08:28,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:08:28,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:08:28,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:08:28,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:08:28,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:08:28,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:08:28,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:08:28,502 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:08:28,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:08:28,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:08:28,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:08:28,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:08:28,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:08:28,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:08:28,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:08:28,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:08:28,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:08:28,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:08:28,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:08:28,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:08:28,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:08:28,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:08:28,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:08:28,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:08:28,950 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:08:28,951 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:08:28,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.05.cil-2.c [2020-12-22 07:08:29,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/227a2a43c/55e6bafb204f4345ab34db63282f334e/FLAG8cf544f67 [2020-12-22 07:08:29,726 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:08:29,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.05.cil-2.c [2020-12-22 07:08:29,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/227a2a43c/55e6bafb204f4345ab34db63282f334e/FLAG8cf544f67 [2020-12-22 07:08:30,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/227a2a43c/55e6bafb204f4345ab34db63282f334e [2020-12-22 07:08:30,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:08:30,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:08:30,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:08:30,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:08:30,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:08:30,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:08:30" (1/1) ... [2020-12-22 07:08:30,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@383dc23f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:30, skipping insertion in model container [2020-12-22 07:08:30,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:08:30" (1/1) ... [2020-12-22 07:08:30,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:08:30,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:08:30,394 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.05.cil-2.c[366,379] [2020-12-22 07:08:30,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:08:30,509 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:08:30,522 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.05.cil-2.c[366,379] [2020-12-22 07:08:30,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:08:30,624 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:08:30,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:30 WrapperNode [2020-12-22 07:08:30,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:08:30,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:08:30,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:08:30,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:08:30,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:30" (1/1) ... [2020-12-22 07:08:30,674 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:30" (1/1) ... [2020-12-22 07:08:30,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:08:30,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:08:30,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:08:30,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:08:30,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:30" (1/1) ... [2020-12-22 07:08:30,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:30" (1/1) ... [2020-12-22 07:08:30,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:30" (1/1) ... [2020-12-22 07:08:30,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:30" (1/1) ... [2020-12-22 07:08:30,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:30" (1/1) ... [2020-12-22 07:08:30,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:30" (1/1) ... [2020-12-22 07:08:30,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:30" (1/1) ... [2020-12-22 07:08:30,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:08:30,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:08:30,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:08:30,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:08:30,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:30" (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 07:08:31,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:08:31,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:08:31,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:08:31,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:08:32,595 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:08:32,596 INFO L299 CfgBuilder]: Removed 198 assume(true) statements. [2020-12-22 07:08:32,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:08:32 BoogieIcfgContainer [2020-12-22 07:08:32,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:08:32,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:08:32,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:08:32,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:08:32,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:08:30" (1/3) ... [2020-12-22 07:08:32,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634c4af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:08:32, skipping insertion in model container [2020-12-22 07:08:32,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:30" (2/3) ... [2020-12-22 07:08:32,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634c4af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:08:32, skipping insertion in model container [2020-12-22 07:08:32,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:08:32" (3/3) ... [2020-12-22 07:08:32,610 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.05.cil-2.c [2020-12-22 07:08:32,617 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:08:32,623 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 07:08:32,646 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 07:08:32,679 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:08:32,680 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:08:32,680 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:08:32,680 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:08:32,680 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:08:32,680 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:08:32,680 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:08:32,681 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:08:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states. [2020-12-22 07:08:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:32,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:32,719 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] [2020-12-22 07:08:32,720 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:32,727 INFO L82 PathProgramCache]: Analyzing trace with hash -967631064, now seen corresponding path program 1 times [2020-12-22 07:08:32,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:32,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664290807] [2020-12-22 07:08:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:32,971 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 07:08:32,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664290807] [2020-12-22 07:08:32,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:32,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:32,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381121299] [2020-12-22 07:08:32,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:32,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:32,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:33,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:33,004 INFO L87 Difference]: Start difference. First operand 540 states. Second operand 3 states. [2020-12-22 07:08:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:33,161 INFO L93 Difference]: Finished difference Result 1075 states and 1663 transitions. [2020-12-22 07:08:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:33,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:08:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:33,183 INFO L225 Difference]: With dead ends: 1075 [2020-12-22 07:08:33,184 INFO L226 Difference]: Without dead ends: 536 [2020-12-22 07:08:33,193 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 07:08:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-12-22 07:08:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2020-12-22 07:08:33,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 536 states. [2020-12-22 07:08:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 812 transitions. [2020-12-22 07:08:33,331 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 812 transitions. Word has length 83 [2020-12-22 07:08:33,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:33,332 INFO L481 AbstractCegarLoop]: Abstraction has 536 states and 812 transitions. [2020-12-22 07:08:33,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:33,333 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 812 transitions. [2020-12-22 07:08:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:33,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:33,343 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] [2020-12-22 07:08:33,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:08:33,344 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:33,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:33,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1207870810, now seen corresponding path program 1 times [2020-12-22 07:08:33,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:33,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845253734] [2020-12-22 07:08:33,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:33,457 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 07:08:33,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845253734] [2020-12-22 07:08:33,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:33,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:33,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839086417] [2020-12-22 07:08:33,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:33,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:33,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:33,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:33,462 INFO L87 Difference]: Start difference. First operand 536 states and 812 transitions. Second operand 3 states. [2020-12-22 07:08:33,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:33,600 INFO L93 Difference]: Finished difference Result 1480 states and 2236 transitions. [2020-12-22 07:08:33,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:33,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:08:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:33,610 INFO L225 Difference]: With dead ends: 1480 [2020-12-22 07:08:33,610 INFO L226 Difference]: Without dead ends: 954 [2020-12-22 07:08:33,614 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 07:08:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2020-12-22 07:08:33,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 950. [2020-12-22 07:08:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-12-22 07:08:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1434 transitions. [2020-12-22 07:08:33,683 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1434 transitions. Word has length 83 [2020-12-22 07:08:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:33,684 INFO L481 AbstractCegarLoop]: Abstraction has 950 states and 1434 transitions. [2020-12-22 07:08:33,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1434 transitions. [2020-12-22 07:08:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:33,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:33,688 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] [2020-12-22 07:08:33,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:08:33,689 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:33,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:33,693 INFO L82 PathProgramCache]: Analyzing trace with hash -258608350, now seen corresponding path program 1 times [2020-12-22 07:08:33,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:33,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098841101] [2020-12-22 07:08:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:33,821 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 07:08:33,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098841101] [2020-12-22 07:08:33,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:33,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:33,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723302128] [2020-12-22 07:08:33,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:33,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:33,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:33,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:33,825 INFO L87 Difference]: Start difference. First operand 950 states and 1434 transitions. Second operand 4 states. [2020-12-22 07:08:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:33,980 INFO L93 Difference]: Finished difference Result 2306 states and 3475 transitions. [2020-12-22 07:08:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:33,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:08:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:33,989 INFO L225 Difference]: With dead ends: 2306 [2020-12-22 07:08:33,989 INFO L226 Difference]: Without dead ends: 1367 [2020-12-22 07:08:33,992 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 07:08:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2020-12-22 07:08:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 950. [2020-12-22 07:08:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-12-22 07:08:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1431 transitions. [2020-12-22 07:08:34,051 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1431 transitions. Word has length 83 [2020-12-22 07:08:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:34,060 INFO L481 AbstractCegarLoop]: Abstraction has 950 states and 1431 transitions. [2020-12-22 07:08:34,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:34,060 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1431 transitions. [2020-12-22 07:08:34,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:34,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:34,064 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] [2020-12-22 07:08:34,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:08:34,064 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2125316388, now seen corresponding path program 1 times [2020-12-22 07:08:34,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:34,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900524014] [2020-12-22 07:08:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:34,174 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 07:08:34,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900524014] [2020-12-22 07:08:34,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:34,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:34,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469963314] [2020-12-22 07:08:34,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:34,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:34,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:34,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:34,177 INFO L87 Difference]: Start difference. First operand 950 states and 1431 transitions. Second operand 4 states. [2020-12-22 07:08:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:34,336 INFO L93 Difference]: Finished difference Result 2304 states and 3465 transitions. [2020-12-22 07:08:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:34,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:08:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:34,345 INFO L225 Difference]: With dead ends: 2304 [2020-12-22 07:08:34,345 INFO L226 Difference]: Without dead ends: 1366 [2020-12-22 07:08:34,347 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 07:08:34,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2020-12-22 07:08:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 950. [2020-12-22 07:08:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-12-22 07:08:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1428 transitions. [2020-12-22 07:08:34,404 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1428 transitions. Word has length 83 [2020-12-22 07:08:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:34,404 INFO L481 AbstractCegarLoop]: Abstraction has 950 states and 1428 transitions. [2020-12-22 07:08:34,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1428 transitions. [2020-12-22 07:08:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:34,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:34,406 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] [2020-12-22 07:08:34,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:08:34,406 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:34,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:34,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2092750110, now seen corresponding path program 1 times [2020-12-22 07:08:34,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:34,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401792155] [2020-12-22 07:08:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:34,523 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 07:08:34,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401792155] [2020-12-22 07:08:34,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:34,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:34,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656368295] [2020-12-22 07:08:34,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:34,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:34,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:34,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:34,527 INFO L87 Difference]: Start difference. First operand 950 states and 1428 transitions. Second operand 3 states. [2020-12-22 07:08:34,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:34,600 INFO L93 Difference]: Finished difference Result 1886 states and 2835 transitions. [2020-12-22 07:08:34,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:34,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:08:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:34,607 INFO L225 Difference]: With dead ends: 1886 [2020-12-22 07:08:34,607 INFO L226 Difference]: Without dead ends: 950 [2020-12-22 07:08:34,609 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 07:08:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2020-12-22 07:08:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 950. [2020-12-22 07:08:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-12-22 07:08:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1420 transitions. [2020-12-22 07:08:34,667 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1420 transitions. Word has length 83 [2020-12-22 07:08:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:34,667 INFO L481 AbstractCegarLoop]: Abstraction has 950 states and 1420 transitions. [2020-12-22 07:08:34,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:34,668 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1420 transitions. [2020-12-22 07:08:34,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:34,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:34,669 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] [2020-12-22 07:08:34,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:08:34,669 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash 34562398, now seen corresponding path program 1 times [2020-12-22 07:08:34,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:34,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440094469] [2020-12-22 07:08:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:34,758 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 07:08:34,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440094469] [2020-12-22 07:08:34,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:34,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:34,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391780326] [2020-12-22 07:08:34,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:34,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:34,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:34,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:34,761 INFO L87 Difference]: Start difference. First operand 950 states and 1420 transitions. Second operand 3 states. [2020-12-22 07:08:34,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:34,835 INFO L93 Difference]: Finished difference Result 1885 states and 2818 transitions. [2020-12-22 07:08:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:34,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:08:34,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:34,841 INFO L225 Difference]: With dead ends: 1885 [2020-12-22 07:08:34,841 INFO L226 Difference]: Without dead ends: 950 [2020-12-22 07:08:34,844 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 07:08:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2020-12-22 07:08:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 950. [2020-12-22 07:08:34,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-12-22 07:08:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1412 transitions. [2020-12-22 07:08:34,922 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1412 transitions. Word has length 83 [2020-12-22 07:08:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:34,923 INFO L481 AbstractCegarLoop]: Abstraction has 950 states and 1412 transitions. [2020-12-22 07:08:34,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1412 transitions. [2020-12-22 07:08:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:34,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:34,924 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] [2020-12-22 07:08:34,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:08:34,924 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:34,930 INFO L82 PathProgramCache]: Analyzing trace with hash -458063776, now seen corresponding path program 1 times [2020-12-22 07:08:34,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:34,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886291714] [2020-12-22 07:08:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:35,005 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 07:08:35,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886291714] [2020-12-22 07:08:35,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:35,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:35,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448772731] [2020-12-22 07:08:35,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:35,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:35,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:35,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:35,014 INFO L87 Difference]: Start difference. First operand 950 states and 1412 transitions. Second operand 4 states. [2020-12-22 07:08:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:35,194 INFO L93 Difference]: Finished difference Result 2254 states and 3349 transitions. [2020-12-22 07:08:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:35,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:08:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:35,202 INFO L225 Difference]: With dead ends: 2254 [2020-12-22 07:08:35,202 INFO L226 Difference]: Without dead ends: 1320 [2020-12-22 07:08:35,206 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 07:08:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2020-12-22 07:08:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 950. [2020-12-22 07:08:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-12-22 07:08:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1409 transitions. [2020-12-22 07:08:35,274 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1409 transitions. Word has length 83 [2020-12-22 07:08:35,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:35,274 INFO L481 AbstractCegarLoop]: Abstraction has 950 states and 1409 transitions. [2020-12-22 07:08:35,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:35,274 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1409 transitions. [2020-12-22 07:08:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:35,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:35,276 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] [2020-12-22 07:08:35,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:08:35,276 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:35,277 INFO L82 PathProgramCache]: Analyzing trace with hash 495876382, now seen corresponding path program 1 times [2020-12-22 07:08:35,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:35,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275385514] [2020-12-22 07:08:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:35,347 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 07:08:35,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275385514] [2020-12-22 07:08:35,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:35,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:35,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841843977] [2020-12-22 07:08:35,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:35,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:35,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:35,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:35,350 INFO L87 Difference]: Start difference. First operand 950 states and 1409 transitions. Second operand 4 states. [2020-12-22 07:08:35,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:35,558 INFO L93 Difference]: Finished difference Result 2252 states and 3339 transitions. [2020-12-22 07:08:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:35,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:08:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:35,566 INFO L225 Difference]: With dead ends: 2252 [2020-12-22 07:08:35,566 INFO L226 Difference]: Without dead ends: 1319 [2020-12-22 07:08:35,569 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 07:08:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2020-12-22 07:08:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 950. [2020-12-22 07:08:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-12-22 07:08:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1406 transitions. [2020-12-22 07:08:35,634 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1406 transitions. Word has length 83 [2020-12-22 07:08:35,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:35,635 INFO L481 AbstractCegarLoop]: Abstraction has 950 states and 1406 transitions. [2020-12-22 07:08:35,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1406 transitions. [2020-12-22 07:08:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:35,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:35,636 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] [2020-12-22 07:08:35,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:08:35,638 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:35,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:35,639 INFO L82 PathProgramCache]: Analyzing trace with hash -720277344, now seen corresponding path program 1 times [2020-12-22 07:08:35,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:35,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673954219] [2020-12-22 07:08:35,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:35,690 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 07:08:35,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673954219] [2020-12-22 07:08:35,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:35,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:35,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456216368] [2020-12-22 07:08:35,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:35,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:35,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:35,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:35,698 INFO L87 Difference]: Start difference. First operand 950 states and 1406 transitions. Second operand 3 states. [2020-12-22 07:08:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:35,794 INFO L93 Difference]: Finished difference Result 1882 states and 2787 transitions. [2020-12-22 07:08:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:35,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:08:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:35,799 INFO L225 Difference]: With dead ends: 1882 [2020-12-22 07:08:35,800 INFO L226 Difference]: Without dead ends: 950 [2020-12-22 07:08:35,802 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 07:08:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2020-12-22 07:08:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 950. [2020-12-22 07:08:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-12-22 07:08:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1384 transitions. [2020-12-22 07:08:35,859 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1384 transitions. Word has length 83 [2020-12-22 07:08:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:35,864 INFO L481 AbstractCegarLoop]: Abstraction has 950 states and 1384 transitions. [2020-12-22 07:08:35,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:35,864 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1384 transitions. [2020-12-22 07:08:35,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:35,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:35,866 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] [2020-12-22 07:08:35,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:08:35,866 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:35,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:35,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1978186147, now seen corresponding path program 1 times [2020-12-22 07:08:35,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:35,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810352958] [2020-12-22 07:08:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:35,908 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 07:08:35,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810352958] [2020-12-22 07:08:35,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:35,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:35,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319159051] [2020-12-22 07:08:35,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:35,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:35,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:35,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:35,912 INFO L87 Difference]: Start difference. First operand 950 states and 1384 transitions. Second operand 4 states. [2020-12-22 07:08:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:36,143 INFO L93 Difference]: Finished difference Result 2248 states and 3275 transitions. [2020-12-22 07:08:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:36,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:08:36,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:36,151 INFO L225 Difference]: With dead ends: 2248 [2020-12-22 07:08:36,152 INFO L226 Difference]: Without dead ends: 1317 [2020-12-22 07:08:36,154 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 07:08:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2020-12-22 07:08:36,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 950. [2020-12-22 07:08:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-12-22 07:08:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1381 transitions. [2020-12-22 07:08:36,224 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1381 transitions. Word has length 83 [2020-12-22 07:08:36,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:36,225 INFO L481 AbstractCegarLoop]: Abstraction has 950 states and 1381 transitions. [2020-12-22 07:08:36,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:36,225 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1381 transitions. [2020-12-22 07:08:36,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:36,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:36,226 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] [2020-12-22 07:08:36,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:08:36,226 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:36,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:36,227 INFO L82 PathProgramCache]: Analyzing trace with hash 630601311, now seen corresponding path program 1 times [2020-12-22 07:08:36,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:36,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867573591] [2020-12-22 07:08:36,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:36,271 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 07:08:36,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867573591] [2020-12-22 07:08:36,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:36,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:36,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776457396] [2020-12-22 07:08:36,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:36,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:36,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:36,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:36,275 INFO L87 Difference]: Start difference. First operand 950 states and 1381 transitions. Second operand 4 states. [2020-12-22 07:08:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:36,457 INFO L93 Difference]: Finished difference Result 2246 states and 3265 transitions. [2020-12-22 07:08:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:36,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:08:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:36,465 INFO L225 Difference]: With dead ends: 2246 [2020-12-22 07:08:36,465 INFO L226 Difference]: Without dead ends: 1316 [2020-12-22 07:08:36,468 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 07:08:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2020-12-22 07:08:36,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 950. [2020-12-22 07:08:36,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-12-22 07:08:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1378 transitions. [2020-12-22 07:08:36,565 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1378 transitions. Word has length 83 [2020-12-22 07:08:36,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:36,567 INFO L481 AbstractCegarLoop]: Abstraction has 950 states and 1378 transitions. [2020-12-22 07:08:36,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1378 transitions. [2020-12-22 07:08:36,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:36,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:36,569 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] [2020-12-22 07:08:36,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:08:36,569 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:36,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:36,576 INFO L82 PathProgramCache]: Analyzing trace with hash 576208413, now seen corresponding path program 1 times [2020-12-22 07:08:36,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:36,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074284251] [2020-12-22 07:08:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:36,624 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 07:08:36,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074284251] [2020-12-22 07:08:36,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:36,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:36,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512081449] [2020-12-22 07:08:36,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:36,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:36,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:36,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:36,628 INFO L87 Difference]: Start difference. First operand 950 states and 1378 transitions. Second operand 3 states. [2020-12-22 07:08:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:36,779 INFO L93 Difference]: Finished difference Result 2718 states and 3934 transitions. [2020-12-22 07:08:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:36,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:08:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:36,788 INFO L225 Difference]: With dead ends: 2718 [2020-12-22 07:08:36,789 INFO L226 Difference]: Without dead ends: 1791 [2020-12-22 07:08:36,791 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 07:08:36,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2020-12-22 07:08:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1711. [2020-12-22 07:08:36,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1711 states. [2020-12-22 07:08:36,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2459 transitions. [2020-12-22 07:08:36,909 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2459 transitions. Word has length 83 [2020-12-22 07:08:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:36,910 INFO L481 AbstractCegarLoop]: Abstraction has 1711 states and 2459 transitions. [2020-12-22 07:08:36,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2459 transitions. [2020-12-22 07:08:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:36,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:36,913 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] [2020-12-22 07:08:36,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:08:36,914 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:36,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:36,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1980391461, now seen corresponding path program 1 times [2020-12-22 07:08:36,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:36,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033712467] [2020-12-22 07:08:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:36,978 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 07:08:36,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033712467] [2020-12-22 07:08:36,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:36,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:36,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510524588] [2020-12-22 07:08:36,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:36,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:36,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:36,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:36,981 INFO L87 Difference]: Start difference. First operand 1711 states and 2459 transitions. Second operand 5 states. [2020-12-22 07:08:37,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:37,358 INFO L93 Difference]: Finished difference Result 5018 states and 7223 transitions. [2020-12-22 07:08:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:37,359 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 07:08:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:37,377 INFO L225 Difference]: With dead ends: 5018 [2020-12-22 07:08:37,378 INFO L226 Difference]: Without dead ends: 3334 [2020-12-22 07:08:37,388 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 07:08:37,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2020-12-22 07:08:37,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 1756. [2020-12-22 07:08:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1756 states. [2020-12-22 07:08:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 2490 transitions. [2020-12-22 07:08:37,548 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 2490 transitions. Word has length 135 [2020-12-22 07:08:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:37,549 INFO L481 AbstractCegarLoop]: Abstraction has 1756 states and 2490 transitions. [2020-12-22 07:08:37,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 2490 transitions. [2020-12-22 07:08:37,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:37,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:37,551 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] [2020-12-22 07:08:37,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:08:37,552 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:37,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1260472543, now seen corresponding path program 1 times [2020-12-22 07:08:37,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:37,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166547495] [2020-12-22 07:08:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:37,626 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 07:08:37,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166547495] [2020-12-22 07:08:37,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:37,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:37,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817205189] [2020-12-22 07:08:37,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:37,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:37,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:37,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:37,629 INFO L87 Difference]: Start difference. First operand 1756 states and 2490 transitions. Second operand 5 states. [2020-12-22 07:08:38,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:38,013 INFO L93 Difference]: Finished difference Result 4619 states and 6551 transitions. [2020-12-22 07:08:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:38,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 07:08:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:38,035 INFO L225 Difference]: With dead ends: 4619 [2020-12-22 07:08:38,035 INFO L226 Difference]: Without dead ends: 2904 [2020-12-22 07:08:38,042 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 07:08:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2020-12-22 07:08:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 1768. [2020-12-22 07:08:38,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1768 states. [2020-12-22 07:08:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 2477 transitions. [2020-12-22 07:08:38,305 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 2477 transitions. Word has length 135 [2020-12-22 07:08:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:38,306 INFO L481 AbstractCegarLoop]: Abstraction has 1768 states and 2477 transitions. [2020-12-22 07:08:38,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 2477 transitions. [2020-12-22 07:08:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:38,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:38,309 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] [2020-12-22 07:08:38,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:08:38,310 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:38,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:38,311 INFO L82 PathProgramCache]: Analyzing trace with hash -773892125, now seen corresponding path program 1 times [2020-12-22 07:08:38,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:38,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573622070] [2020-12-22 07:08:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:38,385 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 07:08:38,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573622070] [2020-12-22 07:08:38,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:38,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:38,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970834899] [2020-12-22 07:08:38,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:38,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:38,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:38,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:38,389 INFO L87 Difference]: Start difference. First operand 1768 states and 2477 transitions. Second operand 5 states. [2020-12-22 07:08:38,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:38,882 INFO L93 Difference]: Finished difference Result 6045 states and 8535 transitions. [2020-12-22 07:08:38,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:38,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 07:08:38,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:38,928 INFO L225 Difference]: With dead ends: 6045 [2020-12-22 07:08:38,928 INFO L226 Difference]: Without dead ends: 4325 [2020-12-22 07:08:38,935 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 07:08:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4325 states. [2020-12-22 07:08:39,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4325 to 1855. [2020-12-22 07:08:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1855 states. [2020-12-22 07:08:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2564 transitions. [2020-12-22 07:08:39,142 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2564 transitions. Word has length 135 [2020-12-22 07:08:39,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:39,143 INFO L481 AbstractCegarLoop]: Abstraction has 1855 states and 2564 transitions. [2020-12-22 07:08:39,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2564 transitions. [2020-12-22 07:08:39,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:39,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:39,147 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] [2020-12-22 07:08:39,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:08:39,147 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:39,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:39,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1580493157, now seen corresponding path program 1 times [2020-12-22 07:08:39,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:39,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921948683] [2020-12-22 07:08:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:39,252 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 07:08:39,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921948683] [2020-12-22 07:08:39,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:39,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:39,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922158377] [2020-12-22 07:08:39,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:39,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:39,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:39,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:39,257 INFO L87 Difference]: Start difference. First operand 1855 states and 2564 transitions. Second operand 4 states. [2020-12-22 07:08:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:39,741 INFO L93 Difference]: Finished difference Result 6060 states and 8362 transitions. [2020-12-22 07:08:39,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:39,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:39,751 INFO L225 Difference]: With dead ends: 6060 [2020-12-22 07:08:39,751 INFO L226 Difference]: Without dead ends: 4258 [2020-12-22 07:08:39,754 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 07:08:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2020-12-22 07:08:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 3408. [2020-12-22 07:08:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3408 states. [2020-12-22 07:08:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3408 states to 3408 states and 4688 transitions. [2020-12-22 07:08:40,078 INFO L78 Accepts]: Start accepts. Automaton has 3408 states and 4688 transitions. Word has length 135 [2020-12-22 07:08:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:40,079 INFO L481 AbstractCegarLoop]: Abstraction has 3408 states and 4688 transitions. [2020-12-22 07:08:40,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3408 states and 4688 transitions. [2020-12-22 07:08:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:40,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:40,083 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] [2020-12-22 07:08:40,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:08:40,083 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:40,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:40,084 INFO L82 PathProgramCache]: Analyzing trace with hash 193811878, now seen corresponding path program 1 times [2020-12-22 07:08:40,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:40,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972283932] [2020-12-22 07:08:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:40,138 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 07:08:40,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972283932] [2020-12-22 07:08:40,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:40,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:40,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634824805] [2020-12-22 07:08:40,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:40,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:40,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:40,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:40,141 INFO L87 Difference]: Start difference. First operand 3408 states and 4688 transitions. Second operand 5 states. [2020-12-22 07:08:40,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:40,976 INFO L93 Difference]: Finished difference Result 9149 states and 12667 transitions. [2020-12-22 07:08:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:40,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 07:08:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:40,994 INFO L225 Difference]: With dead ends: 9149 [2020-12-22 07:08:40,994 INFO L226 Difference]: Without dead ends: 5798 [2020-12-22 07:08:41,002 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 07:08:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2020-12-22 07:08:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 3492. [2020-12-22 07:08:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3492 states. [2020-12-22 07:08:41,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 4747 transitions. [2020-12-22 07:08:41,378 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 4747 transitions. Word has length 135 [2020-12-22 07:08:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:41,378 INFO L481 AbstractCegarLoop]: Abstraction has 3492 states and 4747 transitions. [2020-12-22 07:08:41,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 4747 transitions. [2020-12-22 07:08:41,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:41,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:41,382 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] [2020-12-22 07:08:41,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:08:41,383 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:41,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:41,384 INFO L82 PathProgramCache]: Analyzing trace with hash 2070294696, now seen corresponding path program 1 times [2020-12-22 07:08:41,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:41,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118486894] [2020-12-22 07:08:41,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:41,444 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 07:08:41,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118486894] [2020-12-22 07:08:41,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:41,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:41,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383411725] [2020-12-22 07:08:41,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:41,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:41,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:41,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:41,448 INFO L87 Difference]: Start difference. First operand 3492 states and 4747 transitions. Second operand 5 states. [2020-12-22 07:08:42,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:42,281 INFO L93 Difference]: Finished difference Result 11187 states and 15349 transitions. [2020-12-22 07:08:42,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:42,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 07:08:42,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:42,301 INFO L225 Difference]: With dead ends: 11187 [2020-12-22 07:08:42,301 INFO L226 Difference]: Without dead ends: 7759 [2020-12-22 07:08:42,310 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 07:08:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7759 states. [2020-12-22 07:08:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7759 to 3651. [2020-12-22 07:08:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3651 states. [2020-12-22 07:08:42,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 4906 transitions. [2020-12-22 07:08:42,786 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 4906 transitions. Word has length 135 [2020-12-22 07:08:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:42,786 INFO L481 AbstractCegarLoop]: Abstraction has 3651 states and 4906 transitions. [2020-12-22 07:08:42,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 4906 transitions. [2020-12-22 07:08:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:42,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:42,791 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] [2020-12-22 07:08:42,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:08:42,792 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1984432854, now seen corresponding path program 1 times [2020-12-22 07:08:42,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:42,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89917088] [2020-12-22 07:08:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:42,864 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 07:08:42,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89917088] [2020-12-22 07:08:42,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:42,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:42,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801223623] [2020-12-22 07:08:42,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:42,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:42,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:42,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:42,867 INFO L87 Difference]: Start difference. First operand 3651 states and 4906 transitions. Second operand 4 states. [2020-12-22 07:08:43,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:43,570 INFO L93 Difference]: Finished difference Result 8875 states and 11917 transitions. [2020-12-22 07:08:43,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:43,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:43,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:43,582 INFO L225 Difference]: With dead ends: 8875 [2020-12-22 07:08:43,583 INFO L226 Difference]: Without dead ends: 5293 [2020-12-22 07:08:43,589 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 07:08:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2020-12-22 07:08:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 3651. [2020-12-22 07:08:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3651 states. [2020-12-22 07:08:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 4889 transitions. [2020-12-22 07:08:43,958 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 4889 transitions. Word has length 135 [2020-12-22 07:08:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:43,958 INFO L481 AbstractCegarLoop]: Abstraction has 3651 states and 4889 transitions. [2020-12-22 07:08:43,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 4889 transitions. [2020-12-22 07:08:43,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:43,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:43,962 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] [2020-12-22 07:08:43,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:08:43,962 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:43,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:43,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1957367252, now seen corresponding path program 1 times [2020-12-22 07:08:43,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:43,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581638368] [2020-12-22 07:08:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:44,020 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 07:08:44,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581638368] [2020-12-22 07:08:44,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:44,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:44,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939312546] [2020-12-22 07:08:44,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:44,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:44,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:44,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:44,023 INFO L87 Difference]: Start difference. First operand 3651 states and 4889 transitions. Second operand 4 states. [2020-12-22 07:08:44,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:44,559 INFO L93 Difference]: Finished difference Result 8874 states and 11878 transitions. [2020-12-22 07:08:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:44,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:44,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:44,572 INFO L225 Difference]: With dead ends: 8874 [2020-12-22 07:08:44,573 INFO L226 Difference]: Without dead ends: 5293 [2020-12-22 07:08:44,580 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 07:08:44,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2020-12-22 07:08:44,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 3651. [2020-12-22 07:08:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3651 states. [2020-12-22 07:08:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 4872 transitions. [2020-12-22 07:08:44,987 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 4872 transitions. Word has length 135 [2020-12-22 07:08:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:44,988 INFO L481 AbstractCegarLoop]: Abstraction has 3651 states and 4872 transitions. [2020-12-22 07:08:44,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 4872 transitions. [2020-12-22 07:08:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:44,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:44,992 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] [2020-12-22 07:08:44,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:08:44,992 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:44,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:44,992 INFO L82 PathProgramCache]: Analyzing trace with hash 260263146, now seen corresponding path program 1 times [2020-12-22 07:08:44,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:44,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995212220] [2020-12-22 07:08:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:45,045 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 07:08:45,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995212220] [2020-12-22 07:08:45,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:45,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:45,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81233949] [2020-12-22 07:08:45,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:45,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:45,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:45,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:45,048 INFO L87 Difference]: Start difference. First operand 3651 states and 4872 transitions. Second operand 4 states. [2020-12-22 07:08:45,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:45,759 INFO L93 Difference]: Finished difference Result 9435 states and 12542 transitions. [2020-12-22 07:08:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:45,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:45,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:45,773 INFO L225 Difference]: With dead ends: 9435 [2020-12-22 07:08:45,773 INFO L226 Difference]: Without dead ends: 5855 [2020-12-22 07:08:45,781 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 07:08:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5855 states. [2020-12-22 07:08:46,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5855 to 4205. [2020-12-22 07:08:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4205 states. [2020-12-22 07:08:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4205 states to 4205 states and 5545 transitions. [2020-12-22 07:08:46,292 INFO L78 Accepts]: Start accepts. Automaton has 4205 states and 5545 transitions. Word has length 135 [2020-12-22 07:08:46,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:46,292 INFO L481 AbstractCegarLoop]: Abstraction has 4205 states and 5545 transitions. [2020-12-22 07:08:46,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:46,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4205 states and 5545 transitions. [2020-12-22 07:08:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:46,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:46,297 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] [2020-12-22 07:08:46,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:08:46,297 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:46,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:46,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1994367596, now seen corresponding path program 1 times [2020-12-22 07:08:46,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:46,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731793360] [2020-12-22 07:08:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:46,374 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 07:08:46,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731793360] [2020-12-22 07:08:46,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:46,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:46,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263504199] [2020-12-22 07:08:46,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:46,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:46,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:46,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:46,378 INFO L87 Difference]: Start difference. First operand 4205 states and 5545 transitions. Second operand 4 states. [2020-12-22 07:08:47,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:47,018 INFO L93 Difference]: Finished difference Result 10033 states and 13234 transitions. [2020-12-22 07:08:47,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:47,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:47,033 INFO L225 Difference]: With dead ends: 10033 [2020-12-22 07:08:47,033 INFO L226 Difference]: Without dead ends: 5960 [2020-12-22 07:08:47,041 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 07:08:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5960 states. [2020-12-22 07:08:47,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5960 to 4121. [2020-12-22 07:08:47,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4121 states. [2020-12-22 07:08:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4121 states to 4121 states and 5388 transitions. [2020-12-22 07:08:47,501 INFO L78 Accepts]: Start accepts. Automaton has 4121 states and 5388 transitions. Word has length 135 [2020-12-22 07:08:47,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:47,501 INFO L481 AbstractCegarLoop]: Abstraction has 4121 states and 5388 transitions. [2020-12-22 07:08:47,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:47,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4121 states and 5388 transitions. [2020-12-22 07:08:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:47,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:47,505 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] [2020-12-22 07:08:47,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:08:47,505 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:47,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:47,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2071268394, now seen corresponding path program 1 times [2020-12-22 07:08:47,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:47,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670494399] [2020-12-22 07:08:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:47,561 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 07:08:47,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670494399] [2020-12-22 07:08:47,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:47,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:47,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113945739] [2020-12-22 07:08:47,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:47,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:47,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:47,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:47,564 INFO L87 Difference]: Start difference. First operand 4121 states and 5388 transitions. Second operand 4 states. [2020-12-22 07:08:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:48,114 INFO L93 Difference]: Finished difference Result 9210 states and 12026 transitions. [2020-12-22 07:08:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:48,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:48,124 INFO L225 Difference]: With dead ends: 9210 [2020-12-22 07:08:48,125 INFO L226 Difference]: Without dead ends: 5138 [2020-12-22 07:08:48,133 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 07:08:48,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5138 states. [2020-12-22 07:08:48,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5138 to 4121. [2020-12-22 07:08:48,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4121 states. [2020-12-22 07:08:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4121 states to 4121 states and 5313 transitions. [2020-12-22 07:08:48,496 INFO L78 Accepts]: Start accepts. Automaton has 4121 states and 5313 transitions. Word has length 135 [2020-12-22 07:08:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:48,496 INFO L481 AbstractCegarLoop]: Abstraction has 4121 states and 5313 transitions. [2020-12-22 07:08:48,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 4121 states and 5313 transitions. [2020-12-22 07:08:48,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:48,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:48,500 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] [2020-12-22 07:08:48,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:08:48,500 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:48,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:48,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1103917740, now seen corresponding path program 1 times [2020-12-22 07:08:48,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:48,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644709001] [2020-12-22 07:08:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:48,559 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 07:08:48,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644709001] [2020-12-22 07:08:48,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:48,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:48,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896317238] [2020-12-22 07:08:48,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:48,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:48,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:48,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:48,564 INFO L87 Difference]: Start difference. First operand 4121 states and 5313 transitions. Second operand 4 states. [2020-12-22 07:08:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:49,154 INFO L93 Difference]: Finished difference Result 9766 states and 12584 transitions. [2020-12-22 07:08:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:49,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:49,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:49,161 INFO L225 Difference]: With dead ends: 9766 [2020-12-22 07:08:49,161 INFO L226 Difference]: Without dead ends: 5728 [2020-12-22 07:08:49,167 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 07:08:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5728 states. [2020-12-22 07:08:49,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5728 to 3959. [2020-12-22 07:08:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3959 states. [2020-12-22 07:08:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3959 states to 3959 states and 5026 transitions. [2020-12-22 07:08:49,706 INFO L78 Accepts]: Start accepts. Automaton has 3959 states and 5026 transitions. Word has length 135 [2020-12-22 07:08:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:49,707 INFO L481 AbstractCegarLoop]: Abstraction has 3959 states and 5026 transitions. [2020-12-22 07:08:49,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3959 states and 5026 transitions. [2020-12-22 07:08:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:49,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:49,710 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] [2020-12-22 07:08:49,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:08:49,710 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:49,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1930626767, now seen corresponding path program 1 times [2020-12-22 07:08:49,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:49,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144345706] [2020-12-22 07:08:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:49,766 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 07:08:49,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144345706] [2020-12-22 07:08:49,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:49,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:49,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576823465] [2020-12-22 07:08:49,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:49,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:49,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:49,768 INFO L87 Difference]: Start difference. First operand 3959 states and 5026 transitions. Second operand 4 states. [2020-12-22 07:08:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:50,411 INFO L93 Difference]: Finished difference Result 9306 states and 11837 transitions. [2020-12-22 07:08:50,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:50,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:50,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:50,418 INFO L225 Difference]: With dead ends: 9306 [2020-12-22 07:08:50,419 INFO L226 Difference]: Without dead ends: 5477 [2020-12-22 07:08:50,424 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 07:08:50,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5477 states. [2020-12-22 07:08:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5477 to 3875. [2020-12-22 07:08:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3875 states. [2020-12-22 07:08:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 4869 transitions. [2020-12-22 07:08:50,863 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 4869 transitions. Word has length 135 [2020-12-22 07:08:50,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:50,863 INFO L481 AbstractCegarLoop]: Abstraction has 3875 states and 4869 transitions. [2020-12-22 07:08:50,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:50,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 4869 transitions. [2020-12-22 07:08:50,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:50,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:50,866 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] [2020-12-22 07:08:50,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:08:50,866 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:50,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash -976686609, now seen corresponding path program 1 times [2020-12-22 07:08:50,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:50,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230744068] [2020-12-22 07:08:50,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:50,924 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 07:08:50,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230744068] [2020-12-22 07:08:50,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:50,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:50,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126052875] [2020-12-22 07:08:50,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:50,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:50,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:50,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:50,926 INFO L87 Difference]: Start difference. First operand 3875 states and 4869 transitions. Second operand 4 states. [2020-12-22 07:08:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:51,514 INFO L93 Difference]: Finished difference Result 10018 states and 12511 transitions. [2020-12-22 07:08:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:51,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:51,524 INFO L225 Difference]: With dead ends: 10018 [2020-12-22 07:08:51,525 INFO L226 Difference]: Without dead ends: 6252 [2020-12-22 07:08:51,530 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 07:08:51,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6252 states. [2020-12-22 07:08:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6252 to 4635. [2020-12-22 07:08:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4635 states. [2020-12-22 07:08:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4635 states to 4635 states and 5664 transitions. [2020-12-22 07:08:51,870 INFO L78 Accepts]: Start accepts. Automaton has 4635 states and 5664 transitions. Word has length 135 [2020-12-22 07:08:51,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:51,870 INFO L481 AbstractCegarLoop]: Abstraction has 4635 states and 5664 transitions. [2020-12-22 07:08:51,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 4635 states and 5664 transitions. [2020-12-22 07:08:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:51,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:51,873 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] [2020-12-22 07:08:51,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:08:51,874 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:51,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1193164148, now seen corresponding path program 1 times [2020-12-22 07:08:51,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:51,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336366500] [2020-12-22 07:08:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:51,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336366500] [2020-12-22 07:08:51,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:51,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:51,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284721718] [2020-12-22 07:08:51,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:51,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:51,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:51,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:51,929 INFO L87 Difference]: Start difference. First operand 4635 states and 5664 transitions. Second operand 5 states. [2020-12-22 07:08:52,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:52,627 INFO L93 Difference]: Finished difference Result 10395 states and 12831 transitions. [2020-12-22 07:08:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:52,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 07:08:52,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:52,633 INFO L225 Difference]: With dead ends: 10395 [2020-12-22 07:08:52,633 INFO L226 Difference]: Without dead ends: 5841 [2020-12-22 07:08:52,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:08:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2020-12-22 07:08:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 4647. [2020-12-22 07:08:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4647 states. [2020-12-22 07:08:53,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4647 states to 4647 states and 5600 transitions. [2020-12-22 07:08:53,043 INFO L78 Accepts]: Start accepts. Automaton has 4647 states and 5600 transitions. Word has length 135 [2020-12-22 07:08:53,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:53,044 INFO L481 AbstractCegarLoop]: Abstraction has 4647 states and 5600 transitions. [2020-12-22 07:08:53,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:53,044 INFO L276 IsEmpty]: Start isEmpty. Operand 4647 states and 5600 transitions. [2020-12-22 07:08:53,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:53,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:53,047 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] [2020-12-22 07:08:53,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:08:53,047 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:53,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:53,048 INFO L82 PathProgramCache]: Analyzing trace with hash 295770870, now seen corresponding path program 1 times [2020-12-22 07:08:53,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:53,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379345566] [2020-12-22 07:08:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:53,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379345566] [2020-12-22 07:08:53,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:53,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:53,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641103864] [2020-12-22 07:08:53,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:53,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:53,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:53,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:53,108 INFO L87 Difference]: Start difference. First operand 4647 states and 5600 transitions. Second operand 3 states. [2020-12-22 07:08:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:53,841 INFO L93 Difference]: Finished difference Result 12991 states and 15612 transitions. [2020-12-22 07:08:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:53,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2020-12-22 07:08:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:53,850 INFO L225 Difference]: With dead ends: 12991 [2020-12-22 07:08:53,851 INFO L226 Difference]: Without dead ends: 8571 [2020-12-22 07:08:53,856 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 07:08:53,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8571 states. [2020-12-22 07:08:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8571 to 8567. [2020-12-22 07:08:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8567 states. [2020-12-22 07:08:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8567 states to 8567 states and 10236 transitions. [2020-12-22 07:08:54,533 INFO L78 Accepts]: Start accepts. Automaton has 8567 states and 10236 transitions. Word has length 135 [2020-12-22 07:08:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:54,533 INFO L481 AbstractCegarLoop]: Abstraction has 8567 states and 10236 transitions. [2020-12-22 07:08:54,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 8567 states and 10236 transitions. [2020-12-22 07:08:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:08:54,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:54,538 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] [2020-12-22 07:08:54,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:08:54,539 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:54,539 INFO L82 PathProgramCache]: Analyzing trace with hash -950651702, now seen corresponding path program 1 times [2020-12-22 07:08:54,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:54,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490577152] [2020-12-22 07:08:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:54,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490577152] [2020-12-22 07:08:54,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:54,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:54,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16685887] [2020-12-22 07:08:54,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:54,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:54,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:54,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:54,598 INFO L87 Difference]: Start difference. First operand 8567 states and 10236 transitions. Second operand 3 states. [2020-12-22 07:08:56,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:56,015 INFO L93 Difference]: Finished difference Result 24596 states and 29338 transitions. [2020-12-22 07:08:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:56,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:08:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:56,030 INFO L225 Difference]: With dead ends: 24596 [2020-12-22 07:08:56,030 INFO L226 Difference]: Without dead ends: 16256 [2020-12-22 07:08:56,037 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 07:08:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16256 states. [2020-12-22 07:08:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16256 to 16252. [2020-12-22 07:08:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16252 states. [2020-12-22 07:08:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16252 states to 16252 states and 19318 transitions. [2020-12-22 07:08:57,357 INFO L78 Accepts]: Start accepts. Automaton has 16252 states and 19318 transitions. Word has length 136 [2020-12-22 07:08:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:57,357 INFO L481 AbstractCegarLoop]: Abstraction has 16252 states and 19318 transitions. [2020-12-22 07:08:57,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:57,358 INFO L276 IsEmpty]: Start isEmpty. Operand 16252 states and 19318 transitions. [2020-12-22 07:08:57,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:08:57,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:57,364 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] [2020-12-22 07:08:57,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:08:57,364 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:57,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1495524276, now seen corresponding path program 1 times [2020-12-22 07:08:57,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:57,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917991340] [2020-12-22 07:08:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:57,397 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 07:08:57,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917991340] [2020-12-22 07:08:57,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:57,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:57,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083648977] [2020-12-22 07:08:57,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:57,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:57,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:57,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:57,399 INFO L87 Difference]: Start difference. First operand 16252 states and 19318 transitions. Second operand 3 states. [2020-12-22 07:08:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:58,725 INFO L93 Difference]: Finished difference Result 32056 states and 38128 transitions. [2020-12-22 07:08:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:58,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:08:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:58,743 INFO L225 Difference]: With dead ends: 32056 [2020-12-22 07:08:58,743 INFO L226 Difference]: Without dead ends: 16031 [2020-12-22 07:08:58,756 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 07:08:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16031 states. [2020-12-22 07:09:00,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16031 to 16031. [2020-12-22 07:09:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16031 states. [2020-12-22 07:09:00,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16031 states to 16031 states and 19067 transitions. [2020-12-22 07:09:00,331 INFO L78 Accepts]: Start accepts. Automaton has 16031 states and 19067 transitions. Word has length 136 [2020-12-22 07:09:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:00,331 INFO L481 AbstractCegarLoop]: Abstraction has 16031 states and 19067 transitions. [2020-12-22 07:09:00,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 16031 states and 19067 transitions. [2020-12-22 07:09:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 07:09:00,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:00,337 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] [2020-12-22 07:09:00,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:09:00,338 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:00,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:00,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1209179887, now seen corresponding path program 1 times [2020-12-22 07:09:00,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:00,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666427789] [2020-12-22 07:09:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:00,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666427789] [2020-12-22 07:09:00,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:00,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:00,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977676521] [2020-12-22 07:09:00,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:00,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:00,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:00,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:00,413 INFO L87 Difference]: Start difference. First operand 16031 states and 19067 transitions. Second operand 3 states. [2020-12-22 07:09:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:02,973 INFO L93 Difference]: Finished difference Result 46259 states and 54999 transitions. [2020-12-22 07:09:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:02,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-12-22 07:09:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:03,020 INFO L225 Difference]: With dead ends: 46259 [2020-12-22 07:09:03,020 INFO L226 Difference]: Without dead ends: 30455 [2020-12-22 07:09:03,039 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 07:09:03,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30455 states. [2020-12-22 07:09:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30455 to 30451. [2020-12-22 07:09:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30451 states. [2020-12-22 07:09:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30451 states to 30451 states and 36131 transitions. [2020-12-22 07:09:05,680 INFO L78 Accepts]: Start accepts. Automaton has 30451 states and 36131 transitions. Word has length 137 [2020-12-22 07:09:05,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:05,681 INFO L481 AbstractCegarLoop]: Abstraction has 30451 states and 36131 transitions. [2020-12-22 07:09:05,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:05,681 INFO L276 IsEmpty]: Start isEmpty. Operand 30451 states and 36131 transitions. [2020-12-22 07:09:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 07:09:05,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:05,692 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] [2020-12-22 07:09:05,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:09:05,692 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:05,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:05,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1754052461, now seen corresponding path program 1 times [2020-12-22 07:09:05,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:05,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103555876] [2020-12-22 07:09:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:05,723 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 07:09:05,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103555876] [2020-12-22 07:09:05,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:05,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:05,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598346070] [2020-12-22 07:09:05,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:05,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:05,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:05,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:05,726 INFO L87 Difference]: Start difference. First operand 30451 states and 36131 transitions. Second operand 3 states. [2020-12-22 07:09:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:08,782 INFO L93 Difference]: Finished difference Result 60455 states and 71757 transitions. [2020-12-22 07:09:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:08,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-12-22 07:09:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:08,815 INFO L225 Difference]: With dead ends: 60455 [2020-12-22 07:09:08,815 INFO L226 Difference]: Without dead ends: 30231 [2020-12-22 07:09:08,845 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 07:09:08,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30231 states. [2020-12-22 07:09:11,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30231 to 30231. [2020-12-22 07:09:11,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30231 states. [2020-12-22 07:09:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30231 states to 30231 states and 35882 transitions. [2020-12-22 07:09:11,643 INFO L78 Accepts]: Start accepts. Automaton has 30231 states and 35882 transitions. Word has length 137 [2020-12-22 07:09:11,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:11,643 INFO L481 AbstractCegarLoop]: Abstraction has 30231 states and 35882 transitions. [2020-12-22 07:09:11,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:11,643 INFO L276 IsEmpty]: Start isEmpty. Operand 30231 states and 35882 transitions. [2020-12-22 07:09:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:09:11,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:11,652 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] [2020-12-22 07:09:11,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 07:09:11,653 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:11,653 INFO L82 PathProgramCache]: Analyzing trace with hash 465916591, now seen corresponding path program 1 times [2020-12-22 07:09:11,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:11,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917410828] [2020-12-22 07:09:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:11,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917410828] [2020-12-22 07:09:11,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:11,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:11,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59463362] [2020-12-22 07:09:11,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:11,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:11,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:11,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:11,711 INFO L87 Difference]: Start difference. First operand 30231 states and 35882 transitions. Second operand 3 states. [2020-12-22 07:09:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:16,997 INFO L93 Difference]: Finished difference Result 88722 states and 105220 transitions. [2020-12-22 07:09:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:16,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:09:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:17,062 INFO L225 Difference]: With dead ends: 88722 [2020-12-22 07:09:17,062 INFO L226 Difference]: Without dead ends: 58718 [2020-12-22 07:09:17,090 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 07:09:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58718 states. [2020-12-22 07:09:22,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58718 to 58714. [2020-12-22 07:09:22,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58714 states. [2020-12-22 07:09:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58714 states to 58714 states and 69504 transitions. [2020-12-22 07:09:22,716 INFO L78 Accepts]: Start accepts. Automaton has 58714 states and 69504 transitions. Word has length 138 [2020-12-22 07:09:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:22,717 INFO L481 AbstractCegarLoop]: Abstraction has 58714 states and 69504 transitions. [2020-12-22 07:09:22,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 58714 states and 69504 transitions. [2020-12-22 07:09:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:09:22,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:22,732 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] [2020-12-22 07:09:22,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 07:09:22,733 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:22,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:22,733 INFO L82 PathProgramCache]: Analyzing trace with hash -78955983, now seen corresponding path program 1 times [2020-12-22 07:09:22,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:22,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508162227] [2020-12-22 07:09:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:22,764 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 07:09:22,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508162227] [2020-12-22 07:09:22,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:22,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:22,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237798655] [2020-12-22 07:09:22,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:22,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:22,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:22,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:22,766 INFO L87 Difference]: Start difference. First operand 58714 states and 69504 transitions. Second operand 3 states. [2020-12-22 07:09:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:28,127 INFO L93 Difference]: Finished difference Result 116982 states and 138506 transitions. [2020-12-22 07:09:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:28,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:09:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:28,207 INFO L225 Difference]: With dead ends: 116982 [2020-12-22 07:09:28,207 INFO L226 Difference]: Without dead ends: 58495 [2020-12-22 07:09:28,247 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 07:09:28,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58495 states. [2020-12-22 07:09:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58495 to 58495. [2020-12-22 07:09:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58495 states. [2020-12-22 07:09:33,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58495 states to 58495 states and 69257 transitions. [2020-12-22 07:09:33,700 INFO L78 Accepts]: Start accepts. Automaton has 58495 states and 69257 transitions. Word has length 138 [2020-12-22 07:09:33,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:33,700 INFO L481 AbstractCegarLoop]: Abstraction has 58495 states and 69257 transitions. [2020-12-22 07:09:33,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:33,701 INFO L276 IsEmpty]: Start isEmpty. Operand 58495 states and 69257 transitions. [2020-12-22 07:09:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 07:09:33,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:33,712 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] [2020-12-22 07:09:33,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 07:09:33,713 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:33,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:33,713 INFO L82 PathProgramCache]: Analyzing trace with hash 889768748, now seen corresponding path program 1 times [2020-12-22 07:09:33,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:33,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15037223] [2020-12-22 07:09:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:33,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15037223] [2020-12-22 07:09:33,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:33,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:33,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189176377] [2020-12-22 07:09:33,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:33,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:33,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:33,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:33,775 INFO L87 Difference]: Start difference. First operand 58495 states and 69257 transitions. Second operand 3 states. [2020-12-22 07:09:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:43,628 INFO L93 Difference]: Finished difference Result 169041 states and 200145 transitions. [2020-12-22 07:09:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:43,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2020-12-22 07:09:43,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:43,771 INFO L225 Difference]: With dead ends: 169041 [2020-12-22 07:09:43,771 INFO L226 Difference]: Without dead ends: 110773 [2020-12-22 07:09:43,820 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 07:09:43,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110773 states. [2020-12-22 07:09:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110773 to 110769. [2020-12-22 07:09:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110769 states. [2020-12-22 07:09:54,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110769 states to 110769 states and 130989 transitions. [2020-12-22 07:09:54,535 INFO L78 Accepts]: Start accepts. Automaton has 110769 states and 130989 transitions. Word has length 139 [2020-12-22 07:09:54,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:54,535 INFO L481 AbstractCegarLoop]: Abstraction has 110769 states and 130989 transitions. [2020-12-22 07:09:54,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 110769 states and 130989 transitions. [2020-12-22 07:09:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 07:09:54,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:54,558 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] [2020-12-22 07:09:54,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-22 07:09:54,559 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:54,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:54,559 INFO L82 PathProgramCache]: Analyzing trace with hash 344896174, now seen corresponding path program 1 times [2020-12-22 07:09:54,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:54,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909321152] [2020-12-22 07:09:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:54,622 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 07:09:54,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909321152] [2020-12-22 07:09:54,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:54,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:54,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356502710] [2020-12-22 07:09:54,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:54,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:54,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:54,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:54,625 INFO L87 Difference]: Start difference. First operand 110769 states and 130989 transitions. Second operand 3 states. [2020-12-22 07:10:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:05,387 INFO L93 Difference]: Finished difference Result 221109 states and 261497 transitions. [2020-12-22 07:10:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:05,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2020-12-22 07:10:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:05,663 INFO L225 Difference]: With dead ends: 221109 [2020-12-22 07:10:05,664 INFO L226 Difference]: Without dead ends: 110551 [2020-12-22 07:10:05,730 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 07:10:05,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110551 states. [2020-12-22 07:10:15,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110551 to 110551. [2020-12-22 07:10:15,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110551 states. [2020-12-22 07:10:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110551 states to 110551 states and 130744 transitions. [2020-12-22 07:10:16,116 INFO L78 Accepts]: Start accepts. Automaton has 110551 states and 130744 transitions. Word has length 139 [2020-12-22 07:10:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:16,116 INFO L481 AbstractCegarLoop]: Abstraction has 110551 states and 130744 transitions. [2020-12-22 07:10:16,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 110551 states and 130744 transitions. [2020-12-22 07:10:16,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 07:10:16,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:16,131 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] [2020-12-22 07:10:16,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-12-22 07:10:16,132 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:16,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:16,132 INFO L82 PathProgramCache]: Analyzing trace with hash 314143892, now seen corresponding path program 1 times [2020-12-22 07:10:16,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:16,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355814803] [2020-12-22 07:10:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:16,371 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2020-12-22 07:10:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:16,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355814803] [2020-12-22 07:10:16,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:16,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:10:16,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740825775] [2020-12-22 07:10:16,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:16,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:16,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:16,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:16,391 INFO L87 Difference]: Start difference. First operand 110551 states and 130744 transitions. Second operand 4 states. [2020-12-22 07:10:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:35,870 INFO L93 Difference]: Finished difference Result 322190 states and 379757 transitions. [2020-12-22 07:10:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:10:35,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2020-12-22 07:10:35,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:36,247 INFO L225 Difference]: With dead ends: 322190 [2020-12-22 07:10:36,250 INFO L226 Difference]: Without dead ends: 160883 [2020-12-22 07:10:36,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160883 states.