/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:18:49,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:18:49,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:18:49,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:18:49,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:18:49,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:18:49,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:18:49,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:18:49,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:18:49,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:18:49,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:18:49,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:18:49,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:18:49,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:18:49,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:18:49,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:18:49,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:18:49,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:18:49,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:18:49,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:18:49,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:18:49,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:18:49,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:18:49,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:18:49,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:18:49,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:18:49,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:18:49,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:18:49,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:18:49,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:18:49,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:18:49,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:18:49,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:18:49,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:18:49,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:18:49,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:18:49,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:18:49,722 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:18:49,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:18:49,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:18:49,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:18:49,724 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:18:49,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:18:49,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:18:49,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:18:49,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:18:49,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:18:49,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:18:49,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:18:49,726 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:18:49,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:18:49,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:18:49,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:18:49,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:18:49,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:18:49,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:18:49,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:18:49,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:18:49,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:18:49,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:18:49,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:18:49,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:18:49,729 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:18:50,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:18:50,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:18:50,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:18:50,155 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:18:50,156 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:18:50,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:18:50,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e37617db/bb09d95d47eb4e518db172adcc570033/FLAG3d0ed5104 [2020-12-22 07:18:50,890 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:18:50,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:18:50,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e37617db/bb09d95d47eb4e518db172adcc570033/FLAG3d0ed5104 [2020-12-22 07:18:51,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e37617db/bb09d95d47eb4e518db172adcc570033 [2020-12-22 07:18:51,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:18:51,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:18:51,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:18:51,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:18:51,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:18:51,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:18:51" (1/1) ... [2020-12-22 07:18:51,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27dce46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:51, skipping insertion in model container [2020-12-22 07:18:51,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:18:51" (1/1) ... [2020-12-22 07:18:51,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:18:51,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:18:51,518 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c[12914,12927] [2020-12-22 07:18:51,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:18:51,542 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:18:51,618 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c[12914,12927] [2020-12-22 07:18:51,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:18:51,645 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:18:51,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:51 WrapperNode [2020-12-22 07:18:51,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:18:51,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:18:51,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:18:51,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:18:51,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:51" (1/1) ... [2020-12-22 07:18:51,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:51" (1/1) ... [2020-12-22 07:18:51,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:18:51,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:18:51,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:18:51,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:18:51,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:51" (1/1) ... [2020-12-22 07:18:51,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:51" (1/1) ... [2020-12-22 07:18:51,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:51" (1/1) ... [2020-12-22 07:18:51,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:51" (1/1) ... [2020-12-22 07:18:51,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:51" (1/1) ... [2020-12-22 07:18:51,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:51" (1/1) ... [2020-12-22 07:18:51,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:51" (1/1) ... [2020-12-22 07:18:51,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:18:51,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:18:51,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:18:51,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:18:51,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:51" (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 07:18:51,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:18:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:18:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:18:51,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:18:53,014 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:18:53,015 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 07:18:53,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:18:53 BoogieIcfgContainer [2020-12-22 07:18:53,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:18:53,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:18:53,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:18:53,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:18:53,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:18:51" (1/3) ... [2020-12-22 07:18:53,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303e177a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:18:53, skipping insertion in model container [2020-12-22 07:18:53,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:51" (2/3) ... [2020-12-22 07:18:53,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303e177a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:18:53, skipping insertion in model container [2020-12-22 07:18:53,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:18:53" (3/3) ... [2020-12-22 07:18:53,039 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:18:53,051 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:18:53,058 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:18:53,079 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:18:53,130 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:18:53,131 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:18:53,131 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:18:53,131 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:18:53,131 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:18:53,131 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:18:53,131 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:18:53,132 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:18:53,160 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states. [2020-12-22 07:18:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:18:53,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:53,178 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] [2020-12-22 07:18:53,178 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:53,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:53,187 INFO L82 PathProgramCache]: Analyzing trace with hash 298975739, now seen corresponding path program 1 times [2020-12-22 07:18:53,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:53,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956559633] [2020-12-22 07:18:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:53,521 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 07:18:53,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956559633] [2020-12-22 07:18:53,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:53,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:18:53,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302455955] [2020-12-22 07:18:53,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:18:53,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:53,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:18:53,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:18:53,548 INFO L87 Difference]: Start difference. First operand 136 states. Second operand 2 states. [2020-12-22 07:18:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:53,585 INFO L93 Difference]: Finished difference Result 212 states and 365 transitions. [2020-12-22 07:18:53,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:18:53,587 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:18:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:53,601 INFO L225 Difference]: With dead ends: 212 [2020-12-22 07:18:53,601 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 07:18:53,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:18:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 07:18:53,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-12-22 07:18:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 07:18:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 228 transitions. [2020-12-22 07:18:53,658 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 228 transitions. Word has length 37 [2020-12-22 07:18:53,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:53,659 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 228 transitions. [2020-12-22 07:18:53,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:18:53,659 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 228 transitions. [2020-12-22 07:18:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:18:53,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:53,662 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] [2020-12-22 07:18:53,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:18:53,662 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:53,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:53,663 INFO L82 PathProgramCache]: Analyzing trace with hash -518672711, now seen corresponding path program 1 times [2020-12-22 07:18:53,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:53,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140721614] [2020-12-22 07:18:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:53,814 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 07:18:53,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140721614] [2020-12-22 07:18:53,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:53,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:18:53,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116828783] [2020-12-22 07:18:53,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:18:53,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:53,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:18:53,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:18:53,821 INFO L87 Difference]: Start difference. First operand 132 states and 228 transitions. Second operand 5 states. [2020-12-22 07:18:53,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:53,980 INFO L93 Difference]: Finished difference Result 211 states and 358 transitions. [2020-12-22 07:18:53,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:18:53,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:18:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:53,983 INFO L225 Difference]: With dead ends: 211 [2020-12-22 07:18:53,983 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 07:18:53,985 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 07:18:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 07:18:53,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-12-22 07:18:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 07:18:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 201 transitions. [2020-12-22 07:18:53,998 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 201 transitions. Word has length 37 [2020-12-22 07:18:53,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:53,998 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 201 transitions. [2020-12-22 07:18:53,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:18:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 201 transitions. [2020-12-22 07:18:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:18:54,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:54,001 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] [2020-12-22 07:18:54,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:18:54,002 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:54,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:54,002 INFO L82 PathProgramCache]: Analyzing trace with hash -707453694, now seen corresponding path program 1 times [2020-12-22 07:18:54,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:54,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68427043] [2020-12-22 07:18:54,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:54,202 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 07:18:54,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68427043] [2020-12-22 07:18:54,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:54,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:18:54,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490154410] [2020-12-22 07:18:54,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:18:54,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:54,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:18:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:18:54,205 INFO L87 Difference]: Start difference. First operand 132 states and 201 transitions. Second operand 3 states. [2020-12-22 07:18:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:54,265 INFO L93 Difference]: Finished difference Result 273 states and 436 transitions. [2020-12-22 07:18:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:18:54,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:18:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:54,269 INFO L225 Difference]: With dead ends: 273 [2020-12-22 07:18:54,269 INFO L226 Difference]: Without dead ends: 198 [2020-12-22 07:18:54,270 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 07:18:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-22 07:18:54,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2020-12-22 07:18:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 07:18:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 302 transitions. [2020-12-22 07:18:54,299 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 302 transitions. Word has length 63 [2020-12-22 07:18:54,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:54,300 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 302 transitions. [2020-12-22 07:18:54,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:18:54,300 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 302 transitions. [2020-12-22 07:18:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:18:54,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:54,305 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] [2020-12-22 07:18:54,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:18:54,306 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:54,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:54,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1995563601, now seen corresponding path program 1 times [2020-12-22 07:18:54,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:54,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633575827] [2020-12-22 07:18:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:54,426 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 07:18:54,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633575827] [2020-12-22 07:18:54,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:54,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:18:54,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312367467] [2020-12-22 07:18:54,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:18:54,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:54,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:18:54,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:18:54,429 INFO L87 Difference]: Start difference. First operand 195 states and 302 transitions. Second operand 3 states. [2020-12-22 07:18:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:54,464 INFO L93 Difference]: Finished difference Result 457 states and 730 transitions. [2020-12-22 07:18:54,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:18:54,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:18:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:54,468 INFO L225 Difference]: With dead ends: 457 [2020-12-22 07:18:54,468 INFO L226 Difference]: Without dead ends: 319 [2020-12-22 07:18:54,470 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 07:18:54,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-12-22 07:18:54,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 315. [2020-12-22 07:18:54,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-12-22 07:18:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 496 transitions. [2020-12-22 07:18:54,495 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 496 transitions. Word has length 65 [2020-12-22 07:18:54,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:54,496 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 496 transitions. [2020-12-22 07:18:54,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:18:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 496 transitions. [2020-12-22 07:18:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:18:54,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:54,499 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] [2020-12-22 07:18:54,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:18:54,499 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:54,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:54,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2137075392, now seen corresponding path program 1 times [2020-12-22 07:18:54,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:54,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806321000] [2020-12-22 07:18:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:54,584 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 07:18:54,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806321000] [2020-12-22 07:18:54,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:54,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:18:54,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255431121] [2020-12-22 07:18:54,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:18:54,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:54,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:18:54,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:18:54,587 INFO L87 Difference]: Start difference. First operand 315 states and 496 transitions. Second operand 3 states. [2020-12-22 07:18:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:54,631 INFO L93 Difference]: Finished difference Result 803 states and 1286 transitions. [2020-12-22 07:18:54,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:18:54,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:18:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:54,636 INFO L225 Difference]: With dead ends: 803 [2020-12-22 07:18:54,636 INFO L226 Difference]: Without dead ends: 545 [2020-12-22 07:18:54,638 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 07:18:54,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-12-22 07:18:54,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 539. [2020-12-22 07:18:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-12-22 07:18:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 852 transitions. [2020-12-22 07:18:54,694 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 852 transitions. Word has length 67 [2020-12-22 07:18:54,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:54,694 INFO L481 AbstractCegarLoop]: Abstraction has 539 states and 852 transitions. [2020-12-22 07:18:54,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:18:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 852 transitions. [2020-12-22 07:18:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:18:54,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:54,702 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] [2020-12-22 07:18:54,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:18:54,703 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:54,703 INFO L82 PathProgramCache]: Analyzing trace with hash -544230961, now seen corresponding path program 1 times [2020-12-22 07:18:54,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:54,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449512221] [2020-12-22 07:18:54,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:18:54,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449512221] [2020-12-22 07:18:54,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:54,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:18:54,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601718187] [2020-12-22 07:18:54,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:18:54,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:54,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:18:54,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:18:54,888 INFO L87 Difference]: Start difference. First operand 539 states and 852 transitions. Second operand 5 states. [2020-12-22 07:18:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:55,133 INFO L93 Difference]: Finished difference Result 2303 states and 3746 transitions. [2020-12-22 07:18:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:18:55,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 07:18:55,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:55,144 INFO L225 Difference]: With dead ends: 2303 [2020-12-22 07:18:55,145 INFO L226 Difference]: Without dead ends: 1821 [2020-12-22 07:18:55,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:18:55,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2020-12-22 07:18:55,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 960. [2020-12-22 07:18:55,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 960 states. [2020-12-22 07:18:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1532 transitions. [2020-12-22 07:18:55,197 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1532 transitions. Word has length 69 [2020-12-22 07:18:55,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:55,198 INFO L481 AbstractCegarLoop]: Abstraction has 960 states and 1532 transitions. [2020-12-22 07:18:55,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:18:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1532 transitions. [2020-12-22 07:18:55,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:18:55,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:55,200 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] [2020-12-22 07:18:55,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:18:55,200 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:55,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:55,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1614123231, now seen corresponding path program 1 times [2020-12-22 07:18:55,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:55,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913451334] [2020-12-22 07:18:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:55,279 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 07:18:55,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913451334] [2020-12-22 07:18:55,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:55,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:18:55,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414354054] [2020-12-22 07:18:55,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:18:55,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:55,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:18:55,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:18:55,282 INFO L87 Difference]: Start difference. First operand 960 states and 1532 transitions. Second operand 4 states. [2020-12-22 07:18:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:55,399 INFO L93 Difference]: Finished difference Result 2793 states and 4533 transitions. [2020-12-22 07:18:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:18:55,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 07:18:55,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:55,424 INFO L225 Difference]: With dead ends: 2793 [2020-12-22 07:18:55,424 INFO L226 Difference]: Without dead ends: 1890 [2020-12-22 07:18:55,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:18:55,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2020-12-22 07:18:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1416. [2020-12-22 07:18:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-12-22 07:18:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2275 transitions. [2020-12-22 07:18:55,489 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2275 transitions. Word has length 70 [2020-12-22 07:18:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:55,490 INFO L481 AbstractCegarLoop]: Abstraction has 1416 states and 2275 transitions. [2020-12-22 07:18:55,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:18:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2275 transitions. [2020-12-22 07:18:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:18:55,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:55,492 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] [2020-12-22 07:18:55,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:18:55,492 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:55,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:55,493 INFO L82 PathProgramCache]: Analyzing trace with hash -252040890, now seen corresponding path program 1 times [2020-12-22 07:18:55,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:55,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042942444] [2020-12-22 07:18:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:55,607 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 07:18:55,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042942444] [2020-12-22 07:18:55,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:55,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:18:55,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458823395] [2020-12-22 07:18:55,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:18:55,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:55,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:18:55,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:18:55,610 INFO L87 Difference]: Start difference. First operand 1416 states and 2275 transitions. Second operand 4 states. [2020-12-22 07:18:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:55,764 INFO L93 Difference]: Finished difference Result 4216 states and 6836 transitions. [2020-12-22 07:18:55,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:18:55,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 07:18:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:55,780 INFO L225 Difference]: With dead ends: 4216 [2020-12-22 07:18:55,780 INFO L226 Difference]: Without dead ends: 2857 [2020-12-22 07:18:55,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:18:55,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2020-12-22 07:18:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2067. [2020-12-22 07:18:55,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2067 states. [2020-12-22 07:18:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 3322 transitions. [2020-12-22 07:18:55,898 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 3322 transitions. Word has length 71 [2020-12-22 07:18:55,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:55,899 INFO L481 AbstractCegarLoop]: Abstraction has 2067 states and 3322 transitions. [2020-12-22 07:18:55,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:18:55,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 3322 transitions. [2020-12-22 07:18:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:18:55,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:55,901 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] [2020-12-22 07:18:55,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:18:55,902 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:55,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:55,902 INFO L82 PathProgramCache]: Analyzing trace with hash -630566449, now seen corresponding path program 1 times [2020-12-22 07:18:55,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:55,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076130164] [2020-12-22 07:18:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:55,991 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 07:18:55,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076130164] [2020-12-22 07:18:55,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:55,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:18:55,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971313193] [2020-12-22 07:18:55,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:18:55,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:55,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:18:55,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:18:55,994 INFO L87 Difference]: Start difference. First operand 2067 states and 3322 transitions. Second operand 3 states. [2020-12-22 07:18:56,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:56,101 INFO L93 Difference]: Finished difference Result 4274 states and 6880 transitions. [2020-12-22 07:18:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:18:56,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:18:56,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:56,117 INFO L225 Difference]: With dead ends: 4274 [2020-12-22 07:18:56,117 INFO L226 Difference]: Without dead ends: 3076 [2020-12-22 07:18:56,120 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 07:18:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2020-12-22 07:18:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 3074. [2020-12-22 07:18:56,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3074 states. [2020-12-22 07:18:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 4900 transitions. [2020-12-22 07:18:56,257 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 4900 transitions. Word has length 72 [2020-12-22 07:18:56,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:56,258 INFO L481 AbstractCegarLoop]: Abstraction has 3074 states and 4900 transitions. [2020-12-22 07:18:56,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:18:56,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 4900 transitions. [2020-12-22 07:18:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:18:56,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:56,260 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] [2020-12-22 07:18:56,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:18:56,260 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:56,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:56,261 INFO L82 PathProgramCache]: Analyzing trace with hash -808156936, now seen corresponding path program 1 times [2020-12-22 07:18:56,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:56,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433740578] [2020-12-22 07:18:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:56,321 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 07:18:56,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433740578] [2020-12-22 07:18:56,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:56,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:18:56,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297644620] [2020-12-22 07:18:56,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:18:56,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:56,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:18:56,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:18:56,324 INFO L87 Difference]: Start difference. First operand 3074 states and 4900 transitions. Second operand 4 states. [2020-12-22 07:18:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:56,644 INFO L93 Difference]: Finished difference Result 9240 states and 14853 transitions. [2020-12-22 07:18:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:18:56,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:18:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:56,682 INFO L225 Difference]: With dead ends: 9240 [2020-12-22 07:18:56,683 INFO L226 Difference]: Without dead ends: 6354 [2020-12-22 07:18:56,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:18:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6354 states. [2020-12-22 07:18:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6354 to 4698. [2020-12-22 07:18:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4698 states. [2020-12-22 07:18:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 7486 transitions. [2020-12-22 07:18:57,013 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 7486 transitions. Word has length 72 [2020-12-22 07:18:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:57,013 INFO L481 AbstractCegarLoop]: Abstraction has 4698 states and 7486 transitions. [2020-12-22 07:18:57,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:18:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 7486 transitions. [2020-12-22 07:18:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:18:57,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:57,016 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] [2020-12-22 07:18:57,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:18:57,016 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:57,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:57,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1968035874, now seen corresponding path program 1 times [2020-12-22 07:18:57,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:57,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097895201] [2020-12-22 07:18:57,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:57,074 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 07:18:57,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097895201] [2020-12-22 07:18:57,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:57,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:18:57,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576612915] [2020-12-22 07:18:57,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:18:57,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:57,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:18:57,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:18:57,077 INFO L87 Difference]: Start difference. First operand 4698 states and 7486 transitions. Second operand 3 states. [2020-12-22 07:18:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:57,330 INFO L93 Difference]: Finished difference Result 10286 states and 16464 transitions. [2020-12-22 07:18:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:18:57,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:18:57,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:57,388 INFO L225 Difference]: With dead ends: 10286 [2020-12-22 07:18:57,388 INFO L226 Difference]: Without dead ends: 6983 [2020-12-22 07:18:57,397 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 07:18:57,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6983 states. [2020-12-22 07:18:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6983 to 6981. [2020-12-22 07:18:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6981 states. [2020-12-22 07:18:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6981 states to 6981 states and 11071 transitions. [2020-12-22 07:18:57,765 INFO L78 Accepts]: Start accepts. Automaton has 6981 states and 11071 transitions. Word has length 72 [2020-12-22 07:18:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:57,765 INFO L481 AbstractCegarLoop]: Abstraction has 6981 states and 11071 transitions. [2020-12-22 07:18:57,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:18:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 6981 states and 11071 transitions. [2020-12-22 07:18:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:18:57,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:57,767 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] [2020-12-22 07:18:57,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:18:57,767 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:57,768 INFO L82 PathProgramCache]: Analyzing trace with hash 952039085, now seen corresponding path program 1 times [2020-12-22 07:18:57,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:57,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507421557] [2020-12-22 07:18:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:57,817 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 07:18:57,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507421557] [2020-12-22 07:18:57,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:57,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:18:57,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175636870] [2020-12-22 07:18:57,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:18:57,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:57,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:18:57,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:18:57,819 INFO L87 Difference]: Start difference. First operand 6981 states and 11071 transitions. Second operand 3 states. [2020-12-22 07:18:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:58,286 INFO L93 Difference]: Finished difference Result 15555 states and 24952 transitions. [2020-12-22 07:18:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:18:58,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:18:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:58,310 INFO L225 Difference]: With dead ends: 15555 [2020-12-22 07:18:58,310 INFO L226 Difference]: Without dead ends: 10468 [2020-12-22 07:18:58,323 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 07:18:58,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10468 states. [2020-12-22 07:18:58,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10468 to 10466. [2020-12-22 07:18:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10466 states. [2020-12-22 07:18:58,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10466 states to 10466 states and 16575 transitions. [2020-12-22 07:18:58,927 INFO L78 Accepts]: Start accepts. Automaton has 10466 states and 16575 transitions. Word has length 72 [2020-12-22 07:18:58,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:58,927 INFO L481 AbstractCegarLoop]: Abstraction has 10466 states and 16575 transitions. [2020-12-22 07:18:58,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:18:58,928 INFO L276 IsEmpty]: Start isEmpty. Operand 10466 states and 16575 transitions. [2020-12-22 07:18:58,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:18:58,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:58,929 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] [2020-12-22 07:18:58,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:18:58,929 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:58,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:58,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1377255792, now seen corresponding path program 1 times [2020-12-22 07:18:58,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:58,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099056580] [2020-12-22 07:18:58,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:59,123 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 07:18:59,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099056580] [2020-12-22 07:18:59,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:59,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:18:59,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203902672] [2020-12-22 07:18:59,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:18:59,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:59,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:18:59,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:18:59,126 INFO L87 Difference]: Start difference. First operand 10466 states and 16575 transitions. Second operand 4 states. [2020-12-22 07:19:00,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:00,095 INFO L93 Difference]: Finished difference Result 31026 states and 49119 transitions. [2020-12-22 07:19:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:00,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:19:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:00,148 INFO L225 Difference]: With dead ends: 31026 [2020-12-22 07:19:00,148 INFO L226 Difference]: Without dead ends: 20569 [2020-12-22 07:19:00,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:19:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20569 states. [2020-12-22 07:19:01,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20569 to 20567. [2020-12-22 07:19:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20567 states. [2020-12-22 07:19:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20567 states to 20567 states and 32332 transitions. [2020-12-22 07:19:01,357 INFO L78 Accepts]: Start accepts. Automaton has 20567 states and 32332 transitions. Word has length 74 [2020-12-22 07:19:01,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:01,360 INFO L481 AbstractCegarLoop]: Abstraction has 20567 states and 32332 transitions. [2020-12-22 07:19:01,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 20567 states and 32332 transitions. [2020-12-22 07:19:01,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:19:01,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:01,363 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] [2020-12-22 07:19:01,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:19:01,363 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:01,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1916429764, now seen corresponding path program 1 times [2020-12-22 07:19:01,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:01,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515237001] [2020-12-22 07:19:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:01,401 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 07:19:01,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515237001] [2020-12-22 07:19:01,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:01,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:01,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124988763] [2020-12-22 07:19:01,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:01,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:01,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:01,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:01,403 INFO L87 Difference]: Start difference. First operand 20567 states and 32332 transitions. Second operand 3 states. [2020-12-22 07:19:03,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:03,176 INFO L93 Difference]: Finished difference Result 61663 states and 96934 transitions. [2020-12-22 07:19:03,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:03,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 07:19:03,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:03,299 INFO L225 Difference]: With dead ends: 61663 [2020-12-22 07:19:03,300 INFO L226 Difference]: Without dead ends: 41124 [2020-12-22 07:19:03,336 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 07:19:03,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41124 states. [2020-12-22 07:19:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41124 to 20569. [2020-12-22 07:19:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20569 states. [2020-12-22 07:19:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20569 states to 20569 states and 32334 transitions. [2020-12-22 07:19:04,746 INFO L78 Accepts]: Start accepts. Automaton has 20569 states and 32334 transitions. Word has length 75 [2020-12-22 07:19:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:04,746 INFO L481 AbstractCegarLoop]: Abstraction has 20569 states and 32334 transitions. [2020-12-22 07:19:04,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 20569 states and 32334 transitions. [2020-12-22 07:19:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:19:04,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:04,747 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] [2020-12-22 07:19:04,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:19:04,748 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:04,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash 539922453, now seen corresponding path program 1 times [2020-12-22 07:19:04,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:04,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994652504] [2020-12-22 07:19:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:04,904 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 07:19:04,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994652504] [2020-12-22 07:19:04,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:04,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:04,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491246152] [2020-12-22 07:19:04,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:04,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:04,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:04,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:04,907 INFO L87 Difference]: Start difference. First operand 20569 states and 32334 transitions. Second operand 4 states. [2020-12-22 07:19:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:06,667 INFO L93 Difference]: Finished difference Result 60967 states and 95802 transitions. [2020-12-22 07:19:06,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:06,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:19:06,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:06,739 INFO L225 Difference]: With dead ends: 60967 [2020-12-22 07:19:06,739 INFO L226 Difference]: Without dead ends: 40410 [2020-12-22 07:19:06,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:19:06,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40410 states. [2020-12-22 07:19:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40410 to 40408. [2020-12-22 07:19:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40408 states. [2020-12-22 07:19:08,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40408 states to 40408 states and 63033 transitions. [2020-12-22 07:19:08,474 INFO L78 Accepts]: Start accepts. Automaton has 40408 states and 63033 transitions. Word has length 76 [2020-12-22 07:19:08,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:08,474 INFO L481 AbstractCegarLoop]: Abstraction has 40408 states and 63033 transitions. [2020-12-22 07:19:08,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 40408 states and 63033 transitions. [2020-12-22 07:19:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:19:08,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:08,476 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] [2020-12-22 07:19:08,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:19:08,476 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:08,477 INFO L82 PathProgramCache]: Analyzing trace with hash 31107364, now seen corresponding path program 1 times [2020-12-22 07:19:08,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:08,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374429804] [2020-12-22 07:19:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:08,563 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 07:19:08,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374429804] [2020-12-22 07:19:08,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:08,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:08,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347410012] [2020-12-22 07:19:08,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:08,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:08,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:08,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:08,565 INFO L87 Difference]: Start difference. First operand 40408 states and 63033 transitions. Second operand 4 states. [2020-12-22 07:19:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:11,962 INFO L93 Difference]: Finished difference Result 119716 states and 186647 transitions. [2020-12-22 07:19:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:11,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:19:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:12,130 INFO L225 Difference]: With dead ends: 119716 [2020-12-22 07:19:12,131 INFO L226 Difference]: Without dead ends: 79354 [2020-12-22 07:19:12,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:19:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79354 states. [2020-12-22 07:19:15,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79354 to 79352. [2020-12-22 07:19:15,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79352 states. [2020-12-22 07:19:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79352 states to 79352 states and 122783 transitions. [2020-12-22 07:19:15,684 INFO L78 Accepts]: Start accepts. Automaton has 79352 states and 122783 transitions. Word has length 76 [2020-12-22 07:19:15,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:15,684 INFO L481 AbstractCegarLoop]: Abstraction has 79352 states and 122783 transitions. [2020-12-22 07:19:15,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:15,685 INFO L276 IsEmpty]: Start isEmpty. Operand 79352 states and 122783 transitions. [2020-12-22 07:19:15,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:19:15,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:15,694 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] [2020-12-22 07:19:15,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:19:15,694 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:15,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:15,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1176909096, now seen corresponding path program 1 times [2020-12-22 07:19:15,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:15,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484683066] [2020-12-22 07:19:15,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:15,739 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 07:19:15,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484683066] [2020-12-22 07:19:15,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:15,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:15,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974821871] [2020-12-22 07:19:15,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:15,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:15,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:15,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:15,743 INFO L87 Difference]: Start difference. First operand 79352 states and 122783 transitions. Second operand 3 states. [2020-12-22 07:19:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:21,613 INFO L93 Difference]: Finished difference Result 237932 states and 368157 transitions. [2020-12-22 07:19:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:21,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 07:19:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:21,945 INFO L225 Difference]: With dead ends: 237932 [2020-12-22 07:19:21,946 INFO L226 Difference]: Without dead ends: 158654 [2020-12-22 07:19:22,042 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 07:19:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158654 states. [2020-12-22 07:19:26,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158654 to 79360. [2020-12-22 07:19:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79360 states. [2020-12-22 07:19:26,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79360 states to 79360 states and 122791 transitions. [2020-12-22 07:19:26,302 INFO L78 Accepts]: Start accepts. Automaton has 79360 states and 122791 transitions. Word has length 77 [2020-12-22 07:19:26,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:26,302 INFO L481 AbstractCegarLoop]: Abstraction has 79360 states and 122791 transitions. [2020-12-22 07:19:26,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand 79360 states and 122791 transitions. [2020-12-22 07:19:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:19:26,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:26,305 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] [2020-12-22 07:19:26,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:19:26,305 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:26,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:26,306 INFO L82 PathProgramCache]: Analyzing trace with hash 604186441, now seen corresponding path program 1 times [2020-12-22 07:19:26,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:26,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014177048] [2020-12-22 07:19:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:26,398 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 07:19:26,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014177048] [2020-12-22 07:19:26,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:26,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:26,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862398807] [2020-12-22 07:19:26,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:26,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:26,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:26,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:26,400 INFO L87 Difference]: Start difference. First operand 79360 states and 122791 transitions. Second operand 4 states. [2020-12-22 07:19:32,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:32,389 INFO L93 Difference]: Finished difference Result 235108 states and 363554 transitions. [2020-12-22 07:19:32,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:32,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:19:32,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:32,679 INFO L225 Difference]: With dead ends: 235108 [2020-12-22 07:19:32,679 INFO L226 Difference]: Without dead ends: 155803 [2020-12-22 07:19:32,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:19:32,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155803 states. [2020-12-22 07:19:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155803 to 155801. [2020-12-22 07:19:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155801 states. [2020-12-22 07:19:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155801 states to 155801 states and 239045 transitions. [2020-12-22 07:19:39,854 INFO L78 Accepts]: Start accepts. Automaton has 155801 states and 239045 transitions. Word has length 78 [2020-12-22 07:19:39,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:39,854 INFO L481 AbstractCegarLoop]: Abstraction has 155801 states and 239045 transitions. [2020-12-22 07:19:39,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:39,855 INFO L276 IsEmpty]: Start isEmpty. Operand 155801 states and 239045 transitions. [2020-12-22 07:19:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:19:39,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:39,858 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] [2020-12-22 07:19:39,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:19:39,859 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:39,861 INFO L82 PathProgramCache]: Analyzing trace with hash 120131000, now seen corresponding path program 1 times [2020-12-22 07:19:39,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:39,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984147511] [2020-12-22 07:19:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:39,956 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 07:19:39,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984147511] [2020-12-22 07:19:39,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:39,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:39,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629410971] [2020-12-22 07:19:39,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:39,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:39,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:39,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:39,958 INFO L87 Difference]: Start difference. First operand 155801 states and 239045 transitions. Second operand 4 states. [2020-12-22 07:19:52,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:52,480 INFO L93 Difference]: Finished difference Result 461429 states and 707439 transitions. [2020-12-22 07:19:52,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:52,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:19:52,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:53,133 INFO L225 Difference]: With dead ends: 461429 [2020-12-22 07:19:53,133 INFO L226 Difference]: Without dead ends: 305787 [2020-12-22 07:19:53,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:19:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305787 states. [2020-12-22 07:20:07,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305787 to 305785. [2020-12-22 07:20:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305785 states. [2020-12-22 07:20:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305785 states to 305785 states and 465045 transitions. [2020-12-22 07:20:08,320 INFO L78 Accepts]: Start accepts. Automaton has 305785 states and 465045 transitions. Word has length 78 [2020-12-22 07:20:08,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:08,321 INFO L481 AbstractCegarLoop]: Abstraction has 305785 states and 465045 transitions. [2020-12-22 07:20:08,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 305785 states and 465045 transitions. [2020-12-22 07:20:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:20:08,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:08,327 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] [2020-12-22 07:20:08,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:20:08,327 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:08,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:08,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1883818476, now seen corresponding path program 1 times [2020-12-22 07:20:08,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:08,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994759009] [2020-12-22 07:20:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:08,374 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 07:20:08,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994759009] [2020-12-22 07:20:08,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:08,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:08,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427558186] [2020-12-22 07:20:08,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:08,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:08,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:08,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:08,377 INFO L87 Difference]: Start difference. First operand 305785 states and 465045 transitions. Second operand 3 states. [2020-12-22 07:20:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:33,284 INFO L93 Difference]: Finished difference Result 916061 states and 1393543 transitions. [2020-12-22 07:20:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:33,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:20:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:35,022 INFO L225 Difference]: With dead ends: 916061 [2020-12-22 07:20:35,023 INFO L226 Difference]: Without dead ends: 611339 [2020-12-22 07:20:35,372 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 07:20:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611339 states. [2020-12-22 07:20:56,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611339 to 305817. [2020-12-22 07:20:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305817 states. [2020-12-22 07:20:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305817 states to 305817 states and 465077 transitions. [2020-12-22 07:20:58,359 INFO L78 Accepts]: Start accepts. Automaton has 305817 states and 465077 transitions. Word has length 79 [2020-12-22 07:20:58,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:58,362 INFO L481 AbstractCegarLoop]: Abstraction has 305817 states and 465077 transitions. [2020-12-22 07:20:58,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand 305817 states and 465077 transitions. [2020-12-22 07:20:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:20:58,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:58,371 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] [2020-12-22 07:20:58,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:20:58,372 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:58,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:58,377 INFO L82 PathProgramCache]: Analyzing trace with hash 809988221, now seen corresponding path program 1 times [2020-12-22 07:20:58,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:58,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603196184] [2020-12-22 07:20:58,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:58,661 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 07:20:58,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603196184] [2020-12-22 07:20:58,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:58,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:58,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512122932] [2020-12-22 07:20:58,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:58,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:58,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:58,672 INFO L87 Difference]: Start difference. First operand 305817 states and 465077 transitions. Second operand 4 states. [2020-12-22 07:21:26,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:26,691 INFO L93 Difference]: Finished difference Result 905584 states and 1376019 transitions. [2020-12-22 07:21:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:26,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-12-22 07:21:26,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:28,131 INFO L225 Difference]: With dead ends: 905584 [2020-12-22 07:21:28,131 INFO L226 Difference]: Without dead ends: 600018 [2020-12-22 07:21:28,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:21:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600018 states. [2020-12-22 07:22:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600018 to 600016. [2020-12-22 07:22:03,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600016 states. [2020-12-22 07:22:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600016 states to 600016 states and 904133 transitions. [2020-12-22 07:22:06,163 INFO L78 Accepts]: Start accepts. Automaton has 600016 states and 904133 transitions. Word has length 80 [2020-12-22 07:22:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:06,163 INFO L481 AbstractCegarLoop]: Abstraction has 600016 states and 904133 transitions. [2020-12-22 07:22:06,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 600016 states and 904133 transitions. [2020-12-22 07:22:06,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:22:06,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:06,209 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] [2020-12-22 07:22:06,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:22:06,215 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:06,216 INFO L82 PathProgramCache]: Analyzing trace with hash -715330484, now seen corresponding path program 1 times [2020-12-22 07:22:06,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:06,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350106058] [2020-12-22 07:22:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:06,335 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 07:22:06,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350106058] [2020-12-22 07:22:06,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:06,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:06,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204530762] [2020-12-22 07:22:06,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:06,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:06,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:06,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:06,338 INFO L87 Difference]: Start difference. First operand 600016 states and 904133 transitions. Second operand 4 states.