/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.5.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:24:44,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:24:44,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:24:44,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:24:44,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:24:44,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:24:44,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:24:44,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:24:44,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:24:44,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:24:44,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:24:44,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:24:44,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:24:44,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:24:44,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:24:44,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:24:44,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:24:44,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:24:44,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:24:44,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:24:44,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:24:44,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:24:44,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:24:44,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:24:44,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:24:44,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:24:44,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:24:44,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:24:44,274 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:24:44,331 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:24:44,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:24:44,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:24:44,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:24:44,337 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:24:44,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:24:44,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:24:44,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:24:44,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:24:44,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:24:44,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:24:44,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:24:44,340 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:24:44,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:24:44,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:24:44,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:24:44,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:24:44,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:24:44,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:24:44,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:24:44,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:24:44,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:24:44,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:24:44,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:24:44,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:24:44,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:24:44,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:24:44,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:24:44,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:24:44,861 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:24:44,862 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:24:44,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.ufo.BOUNDED-10.pals.c [2020-12-22 07:24:44,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf4a0f49/cff2987deac6459ab2f89a2233ad740b/FLAG7effaf9e2 [2020-12-22 07:24:45,647 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:24:45,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.ufo.BOUNDED-10.pals.c [2020-12-22 07:24:45,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf4a0f49/cff2987deac6459ab2f89a2233ad740b/FLAG7effaf9e2 [2020-12-22 07:24:45,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf4a0f49/cff2987deac6459ab2f89a2233ad740b [2020-12-22 07:24:45,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:24:45,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:24:45,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:45,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:24:45,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:24:45,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:45" (1/1) ... [2020-12-22 07:24:45,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b6b772a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:45, skipping insertion in model container [2020-12-22 07:24:45,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:45" (1/1) ... [2020-12-22 07:24:45,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:24:46,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:24:46,512 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.5.ufo.BOUNDED-10.pals.c[60915,60928] [2020-12-22 07:24:46,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:46,542 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:24:46,729 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.5.ufo.BOUNDED-10.pals.c[60915,60928] [2020-12-22 07:24:46,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:46,758 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:24:46,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:46 WrapperNode [2020-12-22 07:24:46,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:46,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:46,762 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:24:46,762 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:24:46,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:46" (1/1) ... [2020-12-22 07:24:46,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:46" (1/1) ... [2020-12-22 07:24:46,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:46,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:24:46,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:24:46,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:24:46,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:46" (1/1) ... [2020-12-22 07:24:46,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:46" (1/1) ... [2020-12-22 07:24:46,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:46" (1/1) ... [2020-12-22 07:24:46,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:46" (1/1) ... [2020-12-22 07:24:46,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:46" (1/1) ... [2020-12-22 07:24:47,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:46" (1/1) ... [2020-12-22 07:24:47,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:46" (1/1) ... [2020-12-22 07:24:47,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:24:47,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:24:47,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:24:47,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:24:47,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:46" (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 07:24:47,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:24:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:24:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:24:47,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:24:49,036 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:24:49,036 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:24:49,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:49 BoogieIcfgContainer [2020-12-22 07:24:49,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:24:49,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:24:49,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:24:49,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:24:49,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:24:45" (1/3) ... [2020-12-22 07:24:49,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26682283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:49, skipping insertion in model container [2020-12-22 07:24:49,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:46" (2/3) ... [2020-12-22 07:24:49,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26682283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:49, skipping insertion in model container [2020-12-22 07:24:49,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:49" (3/3) ... [2020-12-22 07:24:49,049 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.ufo.BOUNDED-10.pals.c [2020-12-22 07:24:49,056 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:24:49,065 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:24:49,085 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:24:49,131 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:24:49,132 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:24:49,133 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:24:49,133 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:24:49,134 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:24:49,134 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:24:49,134 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:24:49,134 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:24:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states. [2020-12-22 07:24:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:49,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:49,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:49,196 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:49,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:49,207 INFO L82 PathProgramCache]: Analyzing trace with hash -745157910, now seen corresponding path program 1 times [2020-12-22 07:24:49,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:49,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503348024] [2020-12-22 07:24:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:49,853 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 07:24:49,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503348024] [2020-12-22 07:24:49,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:49,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:24:49,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501760525] [2020-12-22 07:24:49,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:24:49,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:24:49,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:24:49,877 INFO L87 Difference]: Start difference. First operand 706 states. Second operand 2 states. [2020-12-22 07:24:49,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:49,952 INFO L93 Difference]: Finished difference Result 867 states and 1580 transitions. [2020-12-22 07:24:49,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:24:49,954 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 153 [2020-12-22 07:24:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:49,980 INFO L225 Difference]: With dead ends: 867 [2020-12-22 07:24:49,980 INFO L226 Difference]: Without dead ends: 702 [2020-12-22 07:24:49,985 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 07:24:50,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-12-22 07:24:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2020-12-22 07:24:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-12-22 07:24:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1296 transitions. [2020-12-22 07:24:50,127 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1296 transitions. Word has length 153 [2020-12-22 07:24:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:50,128 INFO L481 AbstractCegarLoop]: Abstraction has 702 states and 1296 transitions. [2020-12-22 07:24:50,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:24:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1296 transitions. [2020-12-22 07:24:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:50,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:50,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:50,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:24:50,146 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:50,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:50,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1254631000, now seen corresponding path program 1 times [2020-12-22 07:24:50,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:50,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465685204] [2020-12-22 07:24:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:50,507 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 07:24:50,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465685204] [2020-12-22 07:24:50,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:50,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:24:50,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004362214] [2020-12-22 07:24:50,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:24:50,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:50,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:24:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:50,517 INFO L87 Difference]: Start difference. First operand 702 states and 1296 transitions. Second operand 5 states. [2020-12-22 07:24:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:50,765 INFO L93 Difference]: Finished difference Result 862 states and 1570 transitions. [2020-12-22 07:24:50,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:24:50,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-12-22 07:24:50,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:50,782 INFO L225 Difference]: With dead ends: 862 [2020-12-22 07:24:50,782 INFO L226 Difference]: Without dead ends: 702 [2020-12-22 07:24:50,788 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 07:24:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-12-22 07:24:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2020-12-22 07:24:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-12-22 07:24:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1236 transitions. [2020-12-22 07:24:50,848 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1236 transitions. Word has length 153 [2020-12-22 07:24:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:50,850 INFO L481 AbstractCegarLoop]: Abstraction has 702 states and 1236 transitions. [2020-12-22 07:24:50,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:24:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1236 transitions. [2020-12-22 07:24:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 07:24:50,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:50,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:50,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:24:50,867 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:50,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:50,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1674803025, now seen corresponding path program 1 times [2020-12-22 07:24:50,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:50,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202431590] [2020-12-22 07:24:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:51,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202431590] [2020-12-22 07:24:51,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:51,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:51,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510111983] [2020-12-22 07:24:51,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:51,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:51,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:51,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:51,342 INFO L87 Difference]: Start difference. First operand 702 states and 1236 transitions. Second operand 3 states. [2020-12-22 07:24:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:51,411 INFO L93 Difference]: Finished difference Result 1001 states and 1751 transitions. [2020-12-22 07:24:51,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:51,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-22 07:24:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:51,420 INFO L225 Difference]: With dead ends: 1001 [2020-12-22 07:24:51,420 INFO L226 Difference]: Without dead ends: 845 [2020-12-22 07:24:51,423 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 07:24:51,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2020-12-22 07:24:51,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 843. [2020-12-22 07:24:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 07:24:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1475 transitions. [2020-12-22 07:24:51,460 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1475 transitions. Word has length 212 [2020-12-22 07:24:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:51,468 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1475 transitions. [2020-12-22 07:24:51,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1475 transitions. [2020-12-22 07:24:51,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 07:24:51,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:51,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:51,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:24:51,474 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:51,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1449767861, now seen corresponding path program 1 times [2020-12-22 07:24:51,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:51,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303550664] [2020-12-22 07:24:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:51,827 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 07:24:51,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303550664] [2020-12-22 07:24:51,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:51,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:51,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411354120] [2020-12-22 07:24:51,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:51,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:51,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:51,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:51,836 INFO L87 Difference]: Start difference. First operand 843 states and 1475 transitions. Second operand 3 states. [2020-12-22 07:24:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:51,908 INFO L93 Difference]: Finished difference Result 1415 states and 2451 transitions. [2020-12-22 07:24:51,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:51,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-12-22 07:24:51,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:51,921 INFO L225 Difference]: With dead ends: 1415 [2020-12-22 07:24:51,922 INFO L226 Difference]: Without dead ends: 1118 [2020-12-22 07:24:51,924 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 07:24:51,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2020-12-22 07:24:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1116. [2020-12-22 07:24:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1116 states. [2020-12-22 07:24:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1939 transitions. [2020-12-22 07:24:51,985 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1939 transitions. Word has length 216 [2020-12-22 07:24:51,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:51,986 INFO L481 AbstractCegarLoop]: Abstraction has 1116 states and 1939 transitions. [2020-12-22 07:24:51,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:51,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1939 transitions. [2020-12-22 07:24:51,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 07:24:51,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:51,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:51,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:24:51,995 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:51,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:51,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1203576295, now seen corresponding path program 1 times [2020-12-22 07:24:51,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:51,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051076942] [2020-12-22 07:24:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:52,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051076942] [2020-12-22 07:24:52,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:52,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:52,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294036874] [2020-12-22 07:24:52,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:52,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:52,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:52,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:52,305 INFO L87 Difference]: Start difference. First operand 1116 states and 1939 transitions. Second operand 3 states. [2020-12-22 07:24:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:52,379 INFO L93 Difference]: Finished difference Result 2212 states and 3801 transitions. [2020-12-22 07:24:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:52,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 07:24:52,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:52,391 INFO L225 Difference]: With dead ends: 2212 [2020-12-22 07:24:52,391 INFO L226 Difference]: Without dead ends: 1642 [2020-12-22 07:24:52,393 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 07:24:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2020-12-22 07:24:52,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2020-12-22 07:24:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2020-12-22 07:24:52,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2823 transitions. [2020-12-22 07:24:52,455 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2823 transitions. Word has length 220 [2020-12-22 07:24:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:52,456 INFO L481 AbstractCegarLoop]: Abstraction has 1640 states and 2823 transitions. [2020-12-22 07:24:52,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2823 transitions. [2020-12-22 07:24:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 07:24:52,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:52,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:52,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:24:52,463 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:52,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:52,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1763181181, now seen corresponding path program 1 times [2020-12-22 07:24:52,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:52,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443677664] [2020-12-22 07:24:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:52,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443677664] [2020-12-22 07:24:52,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:52,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:52,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940904021] [2020-12-22 07:24:52,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:52,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:52,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:52,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:52,729 INFO L87 Difference]: Start difference. First operand 1640 states and 2823 transitions. Second operand 3 states. [2020-12-22 07:24:52,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:52,823 INFO L93 Difference]: Finished difference Result 3740 states and 6369 transitions. [2020-12-22 07:24:52,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:52,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2020-12-22 07:24:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:52,839 INFO L225 Difference]: With dead ends: 3740 [2020-12-22 07:24:52,839 INFO L226 Difference]: Without dead ends: 2646 [2020-12-22 07:24:52,841 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 07:24:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2020-12-22 07:24:52,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2644. [2020-12-22 07:24:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2644 states. [2020-12-22 07:24:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 4503 transitions. [2020-12-22 07:24:52,927 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 4503 transitions. Word has length 224 [2020-12-22 07:24:52,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:52,928 INFO L481 AbstractCegarLoop]: Abstraction has 2644 states and 4503 transitions. [2020-12-22 07:24:52,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:52,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 4503 transitions. [2020-12-22 07:24:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 07:24:52,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:52,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:52,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:24:52,936 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:52,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1428296929, now seen corresponding path program 1 times [2020-12-22 07:24:52,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:52,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495732132] [2020-12-22 07:24:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:53,163 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 07:24:53,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495732132] [2020-12-22 07:24:53,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:53,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:53,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681220929] [2020-12-22 07:24:53,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:53,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:53,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:53,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:53,167 INFO L87 Difference]: Start difference. First operand 2644 states and 4503 transitions. Second operand 3 states. [2020-12-22 07:24:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:53,262 INFO L93 Difference]: Finished difference Result 6664 states and 11241 transitions. [2020-12-22 07:24:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:53,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 228 [2020-12-22 07:24:53,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:53,289 INFO L225 Difference]: With dead ends: 6664 [2020-12-22 07:24:53,289 INFO L226 Difference]: Without dead ends: 4566 [2020-12-22 07:24:53,298 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 07:24:53,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2020-12-22 07:24:53,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4564. [2020-12-22 07:24:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4564 states. [2020-12-22 07:24:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 7687 transitions. [2020-12-22 07:24:53,493 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 7687 transitions. Word has length 228 [2020-12-22 07:24:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:53,493 INFO L481 AbstractCegarLoop]: Abstraction has 4564 states and 7687 transitions. [2020-12-22 07:24:53,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 7687 transitions. [2020-12-22 07:24:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-22 07:24:53,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:53,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:53,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:24:53,502 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:53,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:53,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1256580795, now seen corresponding path program 1 times [2020-12-22 07:24:53,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:53,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578734855] [2020-12-22 07:24:53,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:53,790 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 07:24:53,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578734855] [2020-12-22 07:24:53,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:53,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:24:53,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224927191] [2020-12-22 07:24:53,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:24:53,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:53,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:24:53,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:24:53,793 INFO L87 Difference]: Start difference. First operand 4564 states and 7687 transitions. Second operand 7 states. [2020-12-22 07:24:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:54,540 INFO L93 Difference]: Finished difference Result 25254 states and 42608 transitions. [2020-12-22 07:24:54,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:24:54,541 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-12-22 07:24:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:54,633 INFO L225 Difference]: With dead ends: 25254 [2020-12-22 07:24:54,634 INFO L226 Difference]: Without dead ends: 21236 [2020-12-22 07:24:54,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:24:54,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21236 states. [2020-12-22 07:24:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21236 to 10425. [2020-12-22 07:24:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10425 states. [2020-12-22 07:24:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10425 states to 10425 states and 17552 transitions. [2020-12-22 07:24:55,224 INFO L78 Accepts]: Start accepts. Automaton has 10425 states and 17552 transitions. Word has length 232 [2020-12-22 07:24:55,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:55,224 INFO L481 AbstractCegarLoop]: Abstraction has 10425 states and 17552 transitions. [2020-12-22 07:24:55,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:24:55,225 INFO L276 IsEmpty]: Start isEmpty. Operand 10425 states and 17552 transitions. [2020-12-22 07:24:55,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:55,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:55,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:55,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:24:55,238 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:55,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:55,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1967080448, now seen corresponding path program 1 times [2020-12-22 07:24:55,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:55,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452655627] [2020-12-22 07:24:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:55,519 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 07:24:55,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452655627] [2020-12-22 07:24:55,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:55,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:55,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733264261] [2020-12-22 07:24:55,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:55,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:55,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:55,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:55,522 INFO L87 Difference]: Start difference. First operand 10425 states and 17552 transitions. Second operand 4 states. [2020-12-22 07:24:55,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:55,878 INFO L93 Difference]: Finished difference Result 24422 states and 41127 transitions. [2020-12-22 07:24:55,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:55,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 233 [2020-12-22 07:24:55,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:55,915 INFO L225 Difference]: With dead ends: 24422 [2020-12-22 07:24:55,915 INFO L226 Difference]: Without dead ends: 14543 [2020-12-22 07:24:55,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 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 07:24:55,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14543 states. [2020-12-22 07:24:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14543 to 14508. [2020-12-22 07:24:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14508 states. [2020-12-22 07:24:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14508 states to 14508 states and 24415 transitions. [2020-12-22 07:24:56,536 INFO L78 Accepts]: Start accepts. Automaton has 14508 states and 24415 transitions. Word has length 233 [2020-12-22 07:24:56,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:56,537 INFO L481 AbstractCegarLoop]: Abstraction has 14508 states and 24415 transitions. [2020-12-22 07:24:56,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:56,537 INFO L276 IsEmpty]: Start isEmpty. Operand 14508 states and 24415 transitions. [2020-12-22 07:24:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:56,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:56,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:56,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:24:56,552 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:56,553 INFO L82 PathProgramCache]: Analyzing trace with hash 159533448, now seen corresponding path program 1 times [2020-12-22 07:24:56,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:56,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276826642] [2020-12-22 07:24:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:56,826 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 07:24:56,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276826642] [2020-12-22 07:24:56,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:56,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:56,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748681719] [2020-12-22 07:24:56,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:56,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:56,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:56,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:56,829 INFO L87 Difference]: Start difference. First operand 14508 states and 24415 transitions. Second operand 3 states. [2020-12-22 07:24:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:57,240 INFO L93 Difference]: Finished difference Result 29224 states and 49193 transitions. [2020-12-22 07:24:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:57,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:24:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:57,296 INFO L225 Difference]: With dead ends: 29224 [2020-12-22 07:24:57,296 INFO L226 Difference]: Without dead ends: 21778 [2020-12-22 07:24:57,316 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 07:24:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21778 states. [2020-12-22 07:24:57,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21778 to 21776. [2020-12-22 07:24:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21776 states. [2020-12-22 07:24:58,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21776 states to 21776 states and 36490 transitions. [2020-12-22 07:24:58,233 INFO L78 Accepts]: Start accepts. Automaton has 21776 states and 36490 transitions. Word has length 233 [2020-12-22 07:24:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:58,234 INFO L481 AbstractCegarLoop]: Abstraction has 21776 states and 36490 transitions. [2020-12-22 07:24:58,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 21776 states and 36490 transitions. [2020-12-22 07:24:58,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:58,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:58,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:58,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:24:58,264 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:58,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:58,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2066182408, now seen corresponding path program 1 times [2020-12-22 07:24:58,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:58,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915392544] [2020-12-22 07:24:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:58,469 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 07:24:58,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915392544] [2020-12-22 07:24:58,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:58,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:58,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562019486] [2020-12-22 07:24:58,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:58,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:58,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:58,474 INFO L87 Difference]: Start difference. First operand 21776 states and 36490 transitions. Second operand 3 states. [2020-12-22 07:24:59,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:59,165 INFO L93 Difference]: Finished difference Result 40920 states and 68668 transitions. [2020-12-22 07:24:59,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:59,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:24:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:59,237 INFO L225 Difference]: With dead ends: 40920 [2020-12-22 07:24:59,238 INFO L226 Difference]: Without dead ends: 29964 [2020-12-22 07:24:59,263 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 07:24:59,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29964 states. [2020-12-22 07:25:00,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29964 to 29962. [2020-12-22 07:25:00,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29962 states. [2020-12-22 07:25:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29962 states to 29962 states and 50037 transitions. [2020-12-22 07:25:00,147 INFO L78 Accepts]: Start accepts. Automaton has 29962 states and 50037 transitions. Word has length 233 [2020-12-22 07:25:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:00,148 INFO L481 AbstractCegarLoop]: Abstraction has 29962 states and 50037 transitions. [2020-12-22 07:25:00,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 29962 states and 50037 transitions. [2020-12-22 07:25:00,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:25:00,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:00,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:00,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:25:00,156 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:00,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:00,157 INFO L82 PathProgramCache]: Analyzing trace with hash 116201608, now seen corresponding path program 1 times [2020-12-22 07:25:00,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:00,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287089981] [2020-12-22 07:25:00,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:00,461 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 07:25:00,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287089981] [2020-12-22 07:25:00,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:00,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:00,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942775922] [2020-12-22 07:25:00,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:00,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:00,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:00,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:00,464 INFO L87 Difference]: Start difference. First operand 29962 states and 50037 transitions. Second operand 3 states. [2020-12-22 07:25:01,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:01,428 INFO L93 Difference]: Finished difference Result 57038 states and 95447 transitions. [2020-12-22 07:25:01,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:01,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:25:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:01,620 INFO L225 Difference]: With dead ends: 57038 [2020-12-22 07:25:01,620 INFO L226 Difference]: Without dead ends: 41549 [2020-12-22 07:25:01,657 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 07:25:01,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41549 states. [2020-12-22 07:25:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41549 to 41547. [2020-12-22 07:25:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41547 states. [2020-12-22 07:25:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41547 states to 41547 states and 69234 transitions. [2020-12-22 07:25:02,845 INFO L78 Accepts]: Start accepts. Automaton has 41547 states and 69234 transitions. Word has length 233 [2020-12-22 07:25:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:02,845 INFO L481 AbstractCegarLoop]: Abstraction has 41547 states and 69234 transitions. [2020-12-22 07:25:02,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:02,846 INFO L276 IsEmpty]: Start isEmpty. Operand 41547 states and 69234 transitions. [2020-12-22 07:25:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:25:02,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:02,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:02,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:25:02,852 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1001177080, now seen corresponding path program 1 times [2020-12-22 07:25:02,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:02,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533217894] [2020-12-22 07:25:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:03,224 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 07:25:03,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533217894] [2020-12-22 07:25:03,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:03,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:03,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160146259] [2020-12-22 07:25:03,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:03,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:03,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:03,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:03,228 INFO L87 Difference]: Start difference. First operand 41547 states and 69234 transitions. Second operand 3 states. [2020-12-22 07:25:04,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:04,333 INFO L93 Difference]: Finished difference Result 79702 states and 133064 transitions. [2020-12-22 07:25:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:04,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:25:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:04,437 INFO L225 Difference]: With dead ends: 79702 [2020-12-22 07:25:04,437 INFO L226 Difference]: Without dead ends: 57977 [2020-12-22 07:25:04,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:04,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57977 states. [2020-12-22 07:25:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57977 to 57975. [2020-12-22 07:25:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57975 states. [2020-12-22 07:25:06,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57975 states to 57975 states and 96360 transitions. [2020-12-22 07:25:06,204 INFO L78 Accepts]: Start accepts. Automaton has 57975 states and 96360 transitions. Word has length 233 [2020-12-22 07:25:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:06,204 INFO L481 AbstractCegarLoop]: Abstraction has 57975 states and 96360 transitions. [2020-12-22 07:25:06,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:06,204 INFO L276 IsEmpty]: Start isEmpty. Operand 57975 states and 96360 transitions. [2020-12-22 07:25:06,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:25:06,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:06,209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:06,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:25:06,210 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:06,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:06,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1255794568, now seen corresponding path program 1 times [2020-12-22 07:25:06,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:06,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227293846] [2020-12-22 07:25:06,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:06,382 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 07:25:06,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227293846] [2020-12-22 07:25:06,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:06,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:06,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256014670] [2020-12-22 07:25:06,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:06,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:06,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:06,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:06,387 INFO L87 Difference]: Start difference. First operand 57975 states and 96360 transitions. Second operand 3 states. [2020-12-22 07:25:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:08,032 INFO L93 Difference]: Finished difference Result 133163 states and 222144 transitions. [2020-12-22 07:25:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:08,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:25:08,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:08,209 INFO L225 Difference]: With dead ends: 133163 [2020-12-22 07:25:08,209 INFO L226 Difference]: Without dead ends: 90449 [2020-12-22 07:25:08,258 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 07:25:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90449 states. [2020-12-22 07:25:10,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90449 to 90447. [2020-12-22 07:25:10,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90447 states. [2020-12-22 07:25:10,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90447 states to 90447 states and 149897 transitions. [2020-12-22 07:25:10,438 INFO L78 Accepts]: Start accepts. Automaton has 90447 states and 149897 transitions. Word has length 233 [2020-12-22 07:25:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:10,439 INFO L481 AbstractCegarLoop]: Abstraction has 90447 states and 149897 transitions. [2020-12-22 07:25:10,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 90447 states and 149897 transitions. [2020-12-22 07:25:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-22 07:25:10,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:10,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:10,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:25:10,445 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:10,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:10,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1347640466, now seen corresponding path program 1 times [2020-12-22 07:25:10,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:10,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834480733] [2020-12-22 07:25:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:10,941 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 07:25:10,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834480733] [2020-12-22 07:25:10,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:10,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:10,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201127151] [2020-12-22 07:25:10,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:10,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:10,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:10,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:10,946 INFO L87 Difference]: Start difference. First operand 90447 states and 149897 transitions. Second operand 4 states. [2020-12-22 07:25:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:13,915 INFO L93 Difference]: Finished difference Result 299109 states and 496447 transitions. [2020-12-22 07:25:13,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:13,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 234 [2020-12-22 07:25:13,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:14,635 INFO L225 Difference]: With dead ends: 299109 [2020-12-22 07:25:14,635 INFO L226 Difference]: Without dead ends: 209274 [2020-12-22 07:25:14,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 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 07:25:15,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209274 states. [2020-12-22 07:25:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209274 to 149065. [2020-12-22 07:25:18,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149065 states. [2020-12-22 07:25:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149065 states to 149065 states and 246387 transitions. [2020-12-22 07:25:18,929 INFO L78 Accepts]: Start accepts. Automaton has 149065 states and 246387 transitions. Word has length 234 [2020-12-22 07:25:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:18,933 INFO L481 AbstractCegarLoop]: Abstraction has 149065 states and 246387 transitions. [2020-12-22 07:25:18,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 149065 states and 246387 transitions. [2020-12-22 07:25:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:25:18,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:18,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:18,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:25:18,938 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:18,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:18,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1193778039, now seen corresponding path program 1 times [2020-12-22 07:25:18,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:18,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322114275] [2020-12-22 07:25:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:19,142 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 07:25:19,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322114275] [2020-12-22 07:25:19,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:19,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:19,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071851084] [2020-12-22 07:25:19,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:19,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:19,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:19,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:19,148 INFO L87 Difference]: Start difference. First operand 149065 states and 246387 transitions. Second operand 4 states. [2020-12-22 07:25:24,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:24,557 INFO L93 Difference]: Finished difference Result 490664 states and 812358 transitions. [2020-12-22 07:25:24,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:24,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2020-12-22 07:25:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:25,186 INFO L225 Difference]: With dead ends: 490664 [2020-12-22 07:25:25,187 INFO L226 Difference]: Without dead ends: 342211 [2020-12-22 07:25:25,344 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 07:25:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342211 states. [2020-12-22 07:25:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342211 to 245111. [2020-12-22 07:25:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245111 states. [2020-12-22 07:25:32,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245111 states to 245111 states and 404085 transitions. [2020-12-22 07:25:32,065 INFO L78 Accepts]: Start accepts. Automaton has 245111 states and 404085 transitions. Word has length 235 [2020-12-22 07:25:32,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:32,066 INFO L481 AbstractCegarLoop]: Abstraction has 245111 states and 404085 transitions. [2020-12-22 07:25:32,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:32,066 INFO L276 IsEmpty]: Start isEmpty. Operand 245111 states and 404085 transitions. [2020-12-22 07:25:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-22 07:25:32,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:32,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:32,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:25:32,069 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:32,070 INFO L82 PathProgramCache]: Analyzing trace with hash 888014441, now seen corresponding path program 1 times [2020-12-22 07:25:32,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:32,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578548785] [2020-12-22 07:25:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:32,260 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 07:25:32,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578548785] [2020-12-22 07:25:32,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:32,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:32,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286138670] [2020-12-22 07:25:32,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:32,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:32,263 INFO L87 Difference]: Start difference. First operand 245111 states and 404085 transitions. Second operand 4 states. [2020-12-22 07:25:41,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:41,535 INFO L93 Difference]: Finished difference Result 802832 states and 1325838 transitions. [2020-12-22 07:25:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:41,535 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2020-12-22 07:25:41,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:42,699 INFO L225 Difference]: With dead ends: 802832 [2020-12-22 07:25:42,700 INFO L226 Difference]: Without dead ends: 558333 [2020-12-22 07:25:43,332 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 07:25:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558333 states. [2020-12-22 07:25:53,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558333 to 400865. [2020-12-22 07:25:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400865 states. [2020-12-22 07:25:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400865 states to 400865 states and 659175 transitions. [2020-12-22 07:25:55,300 INFO L78 Accepts]: Start accepts. Automaton has 400865 states and 659175 transitions. Word has length 236 [2020-12-22 07:25:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:55,301 INFO L481 AbstractCegarLoop]: Abstraction has 400865 states and 659175 transitions. [2020-12-22 07:25:55,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:55,302 INFO L276 IsEmpty]: Start isEmpty. Operand 400865 states and 659175 transitions. [2020-12-22 07:25:55,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 07:25:55,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:55,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:55,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:25:55,305 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:55,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:55,305 INFO L82 PathProgramCache]: Analyzing trace with hash 168281838, now seen corresponding path program 1 times [2020-12-22 07:25:55,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:55,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499665191] [2020-12-22 07:25:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:56,097 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 07:25:56,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499665191] [2020-12-22 07:25:56,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:56,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:56,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858335127] [2020-12-22 07:25:56,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:56,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:56,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:56,105 INFO L87 Difference]: Start difference. First operand 400865 states and 659175 transitions. Second operand 4 states. [2020-12-22 07:26:13,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:13,392 INFO L93 Difference]: Finished difference Result 1299336 states and 2140398 transitions. [2020-12-22 07:26:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:26:13,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2020-12-22 07:26:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:15,670 INFO L225 Difference]: With dead ends: 1299336 [2020-12-22 07:26:15,670 INFO L226 Difference]: Without dead ends: 899083 [2020-12-22 07:26:16,145 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 07:26:16,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899083 states. [2020-12-22 07:26:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899083 to 648607. [2020-12-22 07:26:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648607 states. [2020-12-22 07:26:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648607 states to 648607 states and 1063905 transitions. [2020-12-22 07:26:37,021 INFO L78 Accepts]: Start accepts. Automaton has 648607 states and 1063905 transitions. Word has length 237 [2020-12-22 07:26:37,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:37,022 INFO L481 AbstractCegarLoop]: Abstraction has 648607 states and 1063905 transitions. [2020-12-22 07:26:37,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:26:37,022 INFO L276 IsEmpty]: Start isEmpty. Operand 648607 states and 1063905 transitions. [2020-12-22 07:26:37,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:26:37,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:37,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:26:37,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:26:37,041 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:37,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:37,042 INFO L82 PathProgramCache]: Analyzing trace with hash 500315686, now seen corresponding path program 1 times [2020-12-22 07:26:37,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:37,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587656487] [2020-12-22 07:26:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:37,478 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 07:26:37,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587656487] [2020-12-22 07:26:37,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:37,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:26:37,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85141521] [2020-12-22 07:26:37,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:26:37,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:37,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:26:37,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:26:37,482 INFO L87 Difference]: Start difference. First operand 648607 states and 1063905 transitions. Second operand 7 states. [2020-12-22 07:26:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:57,048 INFO L93 Difference]: Finished difference Result 1296606 states and 2126748 transitions. [2020-12-22 07:26:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:26:57,048 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 239 [2020-12-22 07:26:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:58,388 INFO L225 Difference]: With dead ends: 1296606 [2020-12-22 07:26:58,388 INFO L226 Difference]: Without dead ends: 648611 [2020-12-22 07:26:58,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:26:59,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648611 states. [2020-12-22 07:27:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648611 to 648607. [2020-12-22 07:27:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648607 states. [2020-12-22 07:27:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648607 states to 648607 states and 1060780 transitions. [2020-12-22 07:27:19,090 INFO L78 Accepts]: Start accepts. Automaton has 648607 states and 1060780 transitions. Word has length 239 [2020-12-22 07:27:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:19,091 INFO L481 AbstractCegarLoop]: Abstraction has 648607 states and 1060780 transitions. [2020-12-22 07:27:19,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:27:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand 648607 states and 1060780 transitions. [2020-12-22 07:27:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 07:27:19,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:19,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:19,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:27:19,110 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:19,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:19,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1866662220, now seen corresponding path program 1 times [2020-12-22 07:27:19,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:19,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010100297] [2020-12-22 07:27:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:20,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010100297] [2020-12-22 07:27:20,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:20,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:27:20,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476694816] [2020-12-22 07:27:20,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:27:20,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:20,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:27:20,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:27:20,298 INFO L87 Difference]: Start difference. First operand 648607 states and 1060780 transitions. Second operand 7 states.