/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 02:14:53,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 02:14:53,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 02:14:53,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 02:14:53,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 02:14:53,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 02:14:53,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 02:14:53,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 02:14:53,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 02:14:53,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 02:14:53,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 02:14:53,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 02:14:53,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 02:14:53,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 02:14:53,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 02:14:53,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 02:14:53,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 02:14:53,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 02:14:53,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 02:14:53,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 02:14:53,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 02:14:53,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 02:14:53,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 02:14:53,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 02:14:53,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 02:14:53,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 02:14:53,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 02:14:53,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 02:14:53,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 02:14:53,953 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 02:14:53,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 02:14:53,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 02:14:53,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 02:14:53,954 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 02:14:53,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 02:14:53,955 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 02:14:53,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 02:14:53,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 02:14:53,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 02:14:53,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 02:14:53,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 02:14:53,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 02:14:53,956 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 02:14:53,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 02:14:53,956 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 02:14:53,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 02:14:53,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 02:14:53,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 02:14:53,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 02:14:53,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 02:14:53,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 02:14:53,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 02:14:53,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 02:14:53,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 02:14:53,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 02:14:53,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 02:14:53,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 02:14:53,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 02:14:53,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 02:14:54,217 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 02:14:54,236 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 02:14:54,240 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 02:14:54,242 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 02:14:54,244 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 02:14:54,246 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 02:14:54,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/843ea6004/d37072be363a4bc58f2fda6cc19dde27/FLAGdd6803c89 [2020-07-20 02:14:54,965 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 02:14:54,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 02:14:54,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/843ea6004/d37072be363a4bc58f2fda6cc19dde27/FLAGdd6803c89 [2020-07-20 02:14:55,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/843ea6004/d37072be363a4bc58f2fda6cc19dde27 [2020-07-20 02:14:55,292 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 02:14:55,295 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 02:14:55,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 02:14:55,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 02:14:55,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 02:14:55,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:14:55" (1/1) ... [2020-07-20 02:14:55,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53a2ed8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:55, skipping insertion in model container [2020-07-20 02:14:55,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:14:55" (1/1) ... [2020-07-20 02:14:55,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 02:14:55,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 02:14:56,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:14:56,402 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 02:14:56,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:14:56,972 INFO L208 MainTranslator]: Completed translation [2020-07-20 02:14:56,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:56 WrapperNode [2020-07-20 02:14:56,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 02:14:56,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 02:14:56,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 02:14:56,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 02:14:56,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:56" (1/1) ... [2020-07-20 02:14:56,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:56" (1/1) ... [2020-07-20 02:14:57,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:56" (1/1) ... [2020-07-20 02:14:57,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:56" (1/1) ... [2020-07-20 02:14:57,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:56" (1/1) ... [2020-07-20 02:14:57,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:56" (1/1) ... [2020-07-20 02:14:57,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:56" (1/1) ... [2020-07-20 02:14:57,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 02:14:57,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 02:14:57,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 02:14:57,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 02:14:57,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:56" (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 [2020-07-20 02:14:57,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 02:14:57,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 02:14:57,224 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 02:14:57,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 02:14:57,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 02:14:57,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 02:14:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 02:14:57,227 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 02:14:57,227 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 02:14:57,227 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 02:14:57,227 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 02:14:57,228 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 02:14:57,228 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 02:14:57,228 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 02:14:57,229 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 02:14:57,229 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 02:14:57,230 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 02:14:57,230 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 02:14:57,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 02:14:57,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 02:14:57,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 02:14:59,827 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 02:14:59,827 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 02:14:59,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:14:59 BoogieIcfgContainer [2020-07-20 02:14:59,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 02:14:59,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 02:14:59,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 02:14:59,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 02:14:59,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:14:55" (1/3) ... [2020-07-20 02:14:59,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44262133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:14:59, skipping insertion in model container [2020-07-20 02:14:59,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:56" (2/3) ... [2020-07-20 02:14:59,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44262133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:14:59, skipping insertion in model container [2020-07-20 02:14:59,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:14:59" (3/3) ... [2020-07-20 02:14:59,845 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 02:14:59,856 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 02:14:59,864 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 02:14:59,879 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 02:14:59,907 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 02:14:59,907 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 02:14:59,907 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 02:14:59,907 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 02:14:59,907 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 02:14:59,908 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 02:14:59,908 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 02:14:59,908 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 02:14:59,944 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-20 02:14:59,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 02:14:59,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:14:59,972 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:14:59,972 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:14:59,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:14:59,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-20 02:14:59,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:14:59,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914458405] [2020-07-20 02:14:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:15:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:02,138 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:15:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:15:02,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914458405] [2020-07-20 02:15:02,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:15:02,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:15:02,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723455384] [2020-07-20 02:15:02,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:15:02,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:15:02,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:15:02,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:15:02,453 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-07-20 02:15:11,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:15:11,280 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-07-20 02:15:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 02:15:11,283 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-07-20 02:15:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:15:11,311 INFO L225 Difference]: With dead ends: 2333 [2020-07-20 02:15:11,312 INFO L226 Difference]: Without dead ends: 1545 [2020-07-20 02:15:11,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:15:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-07-20 02:15:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-07-20 02:15:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-07-20 02:15:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-07-20 02:15:11,483 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-07-20 02:15:11,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:15:11,484 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-07-20 02:15:11,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:15:11,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-07-20 02:15:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 02:15:11,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:15:11,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:15:11,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 02:15:11,492 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:15:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:15:11,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-07-20 02:15:11,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:15:11,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516594012] [2020-07-20 02:15:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:15:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:12,598 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:15:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:15:12,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516594012] [2020-07-20 02:15:12,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:15:12,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:15:12,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420679610] [2020-07-20 02:15:12,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:15:12,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:15:12,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:15:12,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:12,919 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-07-20 02:15:21,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:15:21,627 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-07-20 02:15:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:15:21,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 02:15:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:15:21,644 INFO L225 Difference]: With dead ends: 4438 [2020-07-20 02:15:21,644 INFO L226 Difference]: Without dead ends: 3024 [2020-07-20 02:15:21,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:21,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-07-20 02:15:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-07-20 02:15:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-07-20 02:15:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-07-20 02:15:21,777 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-07-20 02:15:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:15:21,780 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-07-20 02:15:21,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:15:21,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-07-20 02:15:21,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 02:15:21,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:15:21,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:15:21,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 02:15:21,796 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:15:21,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:15:21,796 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-07-20 02:15:21,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:15:21,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15674557] [2020-07-20 02:15:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:15:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:22,552 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:15:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:15:22,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15674557] [2020-07-20 02:15:22,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:15:22,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:15:22,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633366288] [2020-07-20 02:15:22,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:15:22,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:15:22,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:15:22,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:22,760 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-07-20 02:15:31,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:15:31,150 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-07-20 02:15:31,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:15:31,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 02:15:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:15:31,181 INFO L225 Difference]: With dead ends: 8991 [2020-07-20 02:15:31,181 INFO L226 Difference]: Without dead ends: 6011 [2020-07-20 02:15:31,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-07-20 02:15:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-07-20 02:15:31,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-07-20 02:15:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-07-20 02:15:31,339 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-07-20 02:15:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:15:31,339 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-07-20 02:15:31,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:15:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-07-20 02:15:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 02:15:31,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:15:31,350 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:15:31,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 02:15:31,351 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:15:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:15:31,351 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-07-20 02:15:31,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:15:31,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248000747] [2020-07-20 02:15:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:15:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:32,083 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:15:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:15:32,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248000747] [2020-07-20 02:15:32,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:15:32,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:15:32,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681603988] [2020-07-20 02:15:32,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:15:32,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:15:32,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:15:32,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:32,166 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-07-20 02:15:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:15:40,517 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-07-20 02:15:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:15:40,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-07-20 02:15:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:15:40,541 INFO L225 Difference]: With dead ends: 9010 [2020-07-20 02:15:40,542 INFO L226 Difference]: Without dead ends: 6029 [2020-07-20 02:15:40,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-07-20 02:15:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-07-20 02:15:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-07-20 02:15:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-07-20 02:15:40,694 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-07-20 02:15:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:15:40,694 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-07-20 02:15:40,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:15:40,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-07-20 02:15:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 02:15:40,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:15:40,706 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:15:40,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 02:15:40,707 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:15:40,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:15:40,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-07-20 02:15:40,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:15:40,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98451401] [2020-07-20 02:15:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:15:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:41,544 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:15:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:15:41,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98451401] [2020-07-20 02:15:41,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:15:41,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:15:41,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532934586] [2020-07-20 02:15:41,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:15:41,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:15:41,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:15:41,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:41,727 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-07-20 02:15:49,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:15:49,923 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-07-20 02:15:49,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:15:49,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-20 02:15:49,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:15:49,944 INFO L225 Difference]: With dead ends: 8718 [2020-07-20 02:15:49,944 INFO L226 Difference]: Without dead ends: 5904 [2020-07-20 02:15:49,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-07-20 02:15:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-07-20 02:15:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-07-20 02:15:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-07-20 02:15:50,212 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-07-20 02:15:50,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:15:50,216 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-07-20 02:15:50,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:15:50,216 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-07-20 02:15:50,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 02:15:50,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:15:50,232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:15:50,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 02:15:50,232 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:15:50,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:15:50,233 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-07-20 02:15:50,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:15:50,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100069422] [2020-07-20 02:15:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:15:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:51,255 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:15:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:15:51,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100069422] [2020-07-20 02:15:51,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:15:51,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:15:51,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394039511] [2020-07-20 02:15:51,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:15:51,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:15:51,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:15:51,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:15:51,364 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 5 states. [2020-07-20 02:15:57,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:15:57,458 INFO L93 Difference]: Finished difference Result 13189 states and 20201 transitions. [2020-07-20 02:15:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:15:57,460 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-07-20 02:15:57,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:15:57,482 INFO L225 Difference]: With dead ends: 13189 [2020-07-20 02:15:57,483 INFO L226 Difference]: Without dead ends: 6775 [2020-07-20 02:15:57,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:15:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6775 states. [2020-07-20 02:15:57,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6775 to 6773. [2020-07-20 02:15:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6773 states. [2020-07-20 02:15:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6773 states to 6773 states and 10350 transitions. [2020-07-20 02:15:57,749 INFO L78 Accepts]: Start accepts. Automaton has 6773 states and 10350 transitions. Word has length 328 [2020-07-20 02:15:57,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:15:57,749 INFO L479 AbstractCegarLoop]: Abstraction has 6773 states and 10350 transitions. [2020-07-20 02:15:57,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:15:57,750 INFO L276 IsEmpty]: Start isEmpty. Operand 6773 states and 10350 transitions. [2020-07-20 02:15:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 02:15:57,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:15:57,763 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:15:57,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 02:15:57,764 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:15:57,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:15:57,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1619567406, now seen corresponding path program 1 times [2020-07-20 02:15:57,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:15:57,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773704915] [2020-07-20 02:15:57,765 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:15:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:58,410 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:15:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:15:58,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773704915] [2020-07-20 02:15:58,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:15:58,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:15:58,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531760510] [2020-07-20 02:15:58,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:15:58,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:15:58,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:15:58,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:58,516 INFO L87 Difference]: Start difference. First operand 6773 states and 10350 transitions. Second operand 4 states. [2020-07-20 02:16:03,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:16:03,386 INFO L93 Difference]: Finished difference Result 19447 states and 29573 transitions. [2020-07-20 02:16:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:16:03,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 02:16:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:16:03,417 INFO L225 Difference]: With dead ends: 19447 [2020-07-20 02:16:03,417 INFO L226 Difference]: Without dead ends: 13127 [2020-07-20 02:16:03,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:16:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2020-07-20 02:16:03,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 6831. [2020-07-20 02:16:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6831 states. [2020-07-20 02:16:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6831 states to 6831 states and 10425 transitions. [2020-07-20 02:16:03,771 INFO L78 Accepts]: Start accepts. Automaton has 6831 states and 10425 transitions. Word has length 330 [2020-07-20 02:16:03,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:16:03,772 INFO L479 AbstractCegarLoop]: Abstraction has 6831 states and 10425 transitions. [2020-07-20 02:16:03,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:16:03,772 INFO L276 IsEmpty]: Start isEmpty. Operand 6831 states and 10425 transitions. [2020-07-20 02:16:03,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 02:16:03,786 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:16:03,786 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:16:03,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 02:16:03,787 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:16:03,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:16:03,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1432284472, now seen corresponding path program 1 times [2020-07-20 02:16:03,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:16:03,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029777850] [2020-07-20 02:16:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:16:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:04,648 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:16:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:16:04,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029777850] [2020-07-20 02:16:04,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:16:04,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:16:04,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783998669] [2020-07-20 02:16:04,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:16:04,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:16:04,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:16:04,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:16:04,826 INFO L87 Difference]: Start difference. First operand 6831 states and 10425 transitions. Second operand 4 states. [2020-07-20 02:16:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:16:14,050 INFO L93 Difference]: Finished difference Result 19896 states and 30288 transitions. [2020-07-20 02:16:14,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:16:14,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 02:16:14,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:16:14,076 INFO L225 Difference]: With dead ends: 19896 [2020-07-20 02:16:14,076 INFO L226 Difference]: Without dead ends: 13350 [2020-07-20 02:16:14,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:16:14,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13350 states. [2020-07-20 02:16:14,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13350 to 13348. [2020-07-20 02:16:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13348 states. [2020-07-20 02:16:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13348 states to 13348 states and 20240 transitions. [2020-07-20 02:16:14,709 INFO L78 Accepts]: Start accepts. Automaton has 13348 states and 20240 transitions. Word has length 330 [2020-07-20 02:16:14,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:16:14,710 INFO L479 AbstractCegarLoop]: Abstraction has 13348 states and 20240 transitions. [2020-07-20 02:16:14,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:16:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 13348 states and 20240 transitions. [2020-07-20 02:16:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 02:16:14,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:16:14,733 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:16:14,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 02:16:14,733 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:16:14,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:16:14,734 INFO L82 PathProgramCache]: Analyzing trace with hash -491858715, now seen corresponding path program 1 times [2020-07-20 02:16:14,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:16:14,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753027430] [2020-07-20 02:16:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:16:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:15,675 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:16:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:16:15,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753027430] [2020-07-20 02:16:15,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:16:15,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:16:15,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477392768] [2020-07-20 02:16:15,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:16:15,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:16:15,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:16:15,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:16:15,782 INFO L87 Difference]: Start difference. First operand 13348 states and 20240 transitions. Second operand 5 states. [2020-07-20 02:16:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:16:22,959 INFO L93 Difference]: Finished difference Result 30452 states and 45989 transitions. [2020-07-20 02:16:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:16:22,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-07-20 02:16:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:16:22,984 INFO L225 Difference]: With dead ends: 30452 [2020-07-20 02:16:22,984 INFO L226 Difference]: Without dead ends: 15894 [2020-07-20 02:16:23,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:16:23,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15894 states. [2020-07-20 02:16:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15894 to 15892. [2020-07-20 02:16:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15892 states. [2020-07-20 02:16:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15892 states to 15892 states and 23961 transitions. [2020-07-20 02:16:24,248 INFO L78 Accepts]: Start accepts. Automaton has 15892 states and 23961 transitions. Word has length 330 [2020-07-20 02:16:24,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:16:24,249 INFO L479 AbstractCegarLoop]: Abstraction has 15892 states and 23961 transitions. [2020-07-20 02:16:24,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:16:24,249 INFO L276 IsEmpty]: Start isEmpty. Operand 15892 states and 23961 transitions. [2020-07-20 02:16:24,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 02:16:24,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:16:24,271 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:16:24,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 02:16:24,271 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:16:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:16:24,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1136318819, now seen corresponding path program 1 times [2020-07-20 02:16:24,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:16:24,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660774111] [2020-07-20 02:16:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:16:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:25,374 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:16:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:16:25,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660774111] [2020-07-20 02:16:25,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:16:25,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:16:25,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846948009] [2020-07-20 02:16:25,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:16:25,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:16:25,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:16:25,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:16:25,483 INFO L87 Difference]: Start difference. First operand 15892 states and 23961 transitions. Second operand 5 states. [2020-07-20 02:16:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:16:35,829 INFO L93 Difference]: Finished difference Result 41545 states and 62089 transitions. [2020-07-20 02:16:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:16:35,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-07-20 02:16:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:16:35,859 INFO L225 Difference]: With dead ends: 41545 [2020-07-20 02:16:35,860 INFO L226 Difference]: Without dead ends: 27789 [2020-07-20 02:16:35,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:16:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27789 states. [2020-07-20 02:16:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27789 to 16491. [2020-07-20 02:16:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16491 states. [2020-07-20 02:16:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16491 states to 16491 states and 24849 transitions. [2020-07-20 02:16:36,717 INFO L78 Accepts]: Start accepts. Automaton has 16491 states and 24849 transitions. Word has length 330 [2020-07-20 02:16:36,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:16:36,718 INFO L479 AbstractCegarLoop]: Abstraction has 16491 states and 24849 transitions. [2020-07-20 02:16:36,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:16:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 16491 states and 24849 transitions. [2020-07-20 02:16:36,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 02:16:36,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:16:36,737 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:16:36,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 02:16:36,737 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:16:36,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:16:36,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1227056241, now seen corresponding path program 1 times [2020-07-20 02:16:36,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:16:36,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462555520] [2020-07-20 02:16:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:16:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:37,441 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:16:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:16:37,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462555520] [2020-07-20 02:16:37,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:16:37,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:16:37,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589383519] [2020-07-20 02:16:37,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:16:37,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:16:37,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:16:37,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:16:37,518 INFO L87 Difference]: Start difference. First operand 16491 states and 24849 transitions. Second operand 4 states. [2020-07-20 02:16:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:16:44,951 INFO L93 Difference]: Finished difference Result 30491 states and 46183 transitions. [2020-07-20 02:16:44,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:16:44,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 02:16:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:16:44,970 INFO L225 Difference]: With dead ends: 30491 [2020-07-20 02:16:44,970 INFO L226 Difference]: Without dead ends: 20989 [2020-07-20 02:16:44,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:16:44,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20989 states. [2020-07-20 02:16:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20989 to 18395. [2020-07-20 02:16:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18395 states. [2020-07-20 02:16:45,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18395 states to 18395 states and 27871 transitions. [2020-07-20 02:16:45,751 INFO L78 Accepts]: Start accepts. Automaton has 18395 states and 27871 transitions. Word has length 330 [2020-07-20 02:16:45,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:16:45,751 INFO L479 AbstractCegarLoop]: Abstraction has 18395 states and 27871 transitions. [2020-07-20 02:16:45,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:16:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 18395 states and 27871 transitions. [2020-07-20 02:16:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 02:16:45,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:16:45,765 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:16:45,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 02:16:45,765 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:16:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:16:45,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2000347144, now seen corresponding path program 1 times [2020-07-20 02:16:45,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:16:45,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116398625] [2020-07-20 02:16:45,766 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:16:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:46,718 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:16:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:16:46,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116398625] [2020-07-20 02:16:46,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:16:46,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:16:46,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067930470] [2020-07-20 02:16:46,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:16:46,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:16:46,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:16:46,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:16:46,825 INFO L87 Difference]: Start difference. First operand 18395 states and 27871 transitions. Second operand 4 states. [2020-07-20 02:16:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:16:54,139 INFO L93 Difference]: Finished difference Result 33823 states and 51649 transitions. [2020-07-20 02:16:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:16:54,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-20 02:16:54,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:16:54,161 INFO L225 Difference]: With dead ends: 33823 [2020-07-20 02:16:54,161 INFO L226 Difference]: Without dead ends: 23821 [2020-07-20 02:16:54,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:16:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23821 states. [2020-07-20 02:16:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23821 to 21819. [2020-07-20 02:16:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21819 states. [2020-07-20 02:16:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21819 states to 21819 states and 33359 transitions. [2020-07-20 02:16:55,329 INFO L78 Accepts]: Start accepts. Automaton has 21819 states and 33359 transitions. Word has length 332 [2020-07-20 02:16:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:16:55,329 INFO L479 AbstractCegarLoop]: Abstraction has 21819 states and 33359 transitions. [2020-07-20 02:16:55,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:16:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 21819 states and 33359 transitions. [2020-07-20 02:16:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 02:16:55,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:16:55,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:16:55,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 02:16:55,344 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:16:55,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:16:55,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2033012311, now seen corresponding path program 1 times [2020-07-20 02:16:55,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:16:55,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81366648] [2020-07-20 02:16:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:16:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:56,005 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:16:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:16:56,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81366648] [2020-07-20 02:16:56,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:16:56,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:16:56,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973249845] [2020-07-20 02:16:56,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:16:56,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:16:56,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:16:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:16:56,071 INFO L87 Difference]: Start difference. First operand 21819 states and 33359 transitions. Second operand 4 states. [2020-07-20 02:17:06,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:17:06,660 INFO L93 Difference]: Finished difference Result 59507 states and 90499 transitions. [2020-07-20 02:17:06,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:17:06,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-20 02:17:06,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:17:06,697 INFO L225 Difference]: With dead ends: 59507 [2020-07-20 02:17:06,697 INFO L226 Difference]: Without dead ends: 40395 [2020-07-20 02:17:06,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:17:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40395 states. [2020-07-20 02:17:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40395 to 22147. [2020-07-20 02:17:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22147 states. [2020-07-20 02:17:07,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22147 states to 22147 states and 33797 transitions. [2020-07-20 02:17:07,775 INFO L78 Accepts]: Start accepts. Automaton has 22147 states and 33797 transitions. Word has length 332 [2020-07-20 02:17:07,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:17:07,775 INFO L479 AbstractCegarLoop]: Abstraction has 22147 states and 33797 transitions. [2020-07-20 02:17:07,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:17:07,775 INFO L276 IsEmpty]: Start isEmpty. Operand 22147 states and 33797 transitions. [2020-07-20 02:17:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 02:17:07,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:17:07,794 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:17:07,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 02:17:07,794 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:17:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:17:07,795 INFO L82 PathProgramCache]: Analyzing trace with hash -273553115, now seen corresponding path program 1 times [2020-07-20 02:17:07,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:17:07,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317555196] [2020-07-20 02:17:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:17:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:08,639 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:17:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:17:08,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317555196] [2020-07-20 02:17:08,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:17:08,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:17:08,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828534889] [2020-07-20 02:17:08,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:17:08,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:17:08,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:17:08,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:17:08,711 INFO L87 Difference]: Start difference. First operand 22147 states and 33797 transitions. Second operand 4 states. [2020-07-20 02:17:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:17:19,205 INFO L93 Difference]: Finished difference Result 59783 states and 90773 transitions. [2020-07-20 02:17:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:17:19,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-20 02:17:19,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:17:19,246 INFO L225 Difference]: With dead ends: 59783 [2020-07-20 02:17:19,247 INFO L226 Difference]: Without dead ends: 40691 [2020-07-20 02:17:19,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:17:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40691 states. [2020-07-20 02:17:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40691 to 22475. [2020-07-20 02:17:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22475 states. [2020-07-20 02:17:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22475 states to 22475 states and 34165 transitions. [2020-07-20 02:17:20,604 INFO L78 Accepts]: Start accepts. Automaton has 22475 states and 34165 transitions. Word has length 333 [2020-07-20 02:17:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:17:20,604 INFO L479 AbstractCegarLoop]: Abstraction has 22475 states and 34165 transitions. [2020-07-20 02:17:20,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:17:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 22475 states and 34165 transitions. [2020-07-20 02:17:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 02:17:20,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:17:20,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:17:20,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 02:17:20,623 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:17:20,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:17:20,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1275140562, now seen corresponding path program 1 times [2020-07-20 02:17:20,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:17:20,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157500197] [2020-07-20 02:17:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:17:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:21,679 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:17:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:17:21,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157500197] [2020-07-20 02:17:21,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:17:21,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 02:17:21,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29072981] [2020-07-20 02:17:21,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 02:17:21,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:17:21,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 02:17:21,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-07-20 02:17:21,868 INFO L87 Difference]: Start difference. First operand 22475 states and 34165 transitions. Second operand 10 states. [2020-07-20 02:17:22,518 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2020-07-20 02:17:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:17:33,702 INFO L93 Difference]: Finished difference Result 65989 states and 102088 transitions. [2020-07-20 02:17:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 02:17:33,702 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 333 [2020-07-20 02:17:33,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:17:33,779 INFO L225 Difference]: With dead ends: 65989 [2020-07-20 02:17:33,779 INFO L226 Difference]: Without dead ends: 51735 [2020-07-20 02:17:33,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:17:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51735 states. [2020-07-20 02:17:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51735 to 41573. [2020-07-20 02:17:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41573 states. [2020-07-20 02:17:36,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41573 states to 41573 states and 63357 transitions. [2020-07-20 02:17:36,461 INFO L78 Accepts]: Start accepts. Automaton has 41573 states and 63357 transitions. Word has length 333 [2020-07-20 02:17:36,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:17:36,461 INFO L479 AbstractCegarLoop]: Abstraction has 41573 states and 63357 transitions. [2020-07-20 02:17:36,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 02:17:36,461 INFO L276 IsEmpty]: Start isEmpty. Operand 41573 states and 63357 transitions. [2020-07-20 02:17:36,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 02:17:36,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:17:36,481 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:17:36,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 02:17:36,481 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:17:36,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:17:36,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1537943031, now seen corresponding path program 1 times [2020-07-20 02:17:36,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:17:36,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296439860] [2020-07-20 02:17:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:17:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:37,757 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:17:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:17:37,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296439860] [2020-07-20 02:17:37,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:17:37,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:17:37,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563095673] [2020-07-20 02:17:37,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:17:37,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:17:37,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:17:37,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:17:37,873 INFO L87 Difference]: Start difference. First operand 41573 states and 63357 transitions. Second operand 5 states. [2020-07-20 02:17:38,476 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-07-20 02:17:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:17:47,287 INFO L93 Difference]: Finished difference Result 70055 states and 109281 transitions. [2020-07-20 02:17:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 02:17:47,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-07-20 02:17:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:17:47,343 INFO L225 Difference]: With dead ends: 70055 [2020-07-20 02:17:47,343 INFO L226 Difference]: Without dead ends: 49391 [2020-07-20 02:17:47,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:17:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49391 states. [2020-07-20 02:17:50,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49391 to 49389. [2020-07-20 02:17:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49389 states. [2020-07-20 02:17:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49389 states to 49389 states and 75753 transitions. [2020-07-20 02:17:50,463 INFO L78 Accepts]: Start accepts. Automaton has 49389 states and 75753 transitions. Word has length 333 [2020-07-20 02:17:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:17:50,464 INFO L479 AbstractCegarLoop]: Abstraction has 49389 states and 75753 transitions. [2020-07-20 02:17:50,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:17:50,464 INFO L276 IsEmpty]: Start isEmpty. Operand 49389 states and 75753 transitions. [2020-07-20 02:17:50,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 02:17:50,482 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:17:50,482 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:17:50,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 02:17:50,482 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:17:50,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:17:50,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1942664128, now seen corresponding path program 1 times [2020-07-20 02:17:50,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:17:50,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295102218] [2020-07-20 02:17:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:17:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:51,481 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:17:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:17:51,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295102218] [2020-07-20 02:17:51,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:17:51,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:17:51,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528432814] [2020-07-20 02:17:51,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:17:51,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:17:51,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:17:51,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:17:51,595 INFO L87 Difference]: Start difference. First operand 49389 states and 75753 transitions. Second operand 5 states. [2020-07-20 02:18:06,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:18:06,970 INFO L93 Difference]: Finished difference Result 144252 states and 220978 transitions. [2020-07-20 02:18:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:18:06,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-07-20 02:18:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:18:07,091 INFO L225 Difference]: With dead ends: 144252 [2020-07-20 02:18:07,091 INFO L226 Difference]: Without dead ends: 95694 [2020-07-20 02:18:07,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:18:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95694 states. [2020-07-20 02:18:15,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95694 to 95692. [2020-07-20 02:18:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95692 states. [2020-07-20 02:18:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95692 states to 95692 states and 145852 transitions. [2020-07-20 02:18:15,123 INFO L78 Accepts]: Start accepts. Automaton has 95692 states and 145852 transitions. Word has length 333 [2020-07-20 02:18:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:18:15,123 INFO L479 AbstractCegarLoop]: Abstraction has 95692 states and 145852 transitions. [2020-07-20 02:18:15,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:18:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 95692 states and 145852 transitions. [2020-07-20 02:18:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 02:18:15,156 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:18:15,156 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:18:15,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 02:18:15,157 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:18:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:18:15,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1968714646, now seen corresponding path program 1 times [2020-07-20 02:18:15,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:18:15,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223460979] [2020-07-20 02:18:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:18:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:16,255 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:18:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:18:16,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223460979] [2020-07-20 02:18:16,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:18:16,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:18:16,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393617175] [2020-07-20 02:18:16,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:18:16,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:18:16,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:18:16,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:18:16,332 INFO L87 Difference]: Start difference. First operand 95692 states and 145852 transitions. Second operand 5 states. [2020-07-20 02:18:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:18:31,448 INFO L93 Difference]: Finished difference Result 137921 states and 210173 transitions. [2020-07-20 02:18:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:18:31,449 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-20 02:18:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:18:31,552 INFO L225 Difference]: With dead ends: 137921 [2020-07-20 02:18:31,552 INFO L226 Difference]: Without dead ends: 95694 [2020-07-20 02:18:31,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:18:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95694 states. [2020-07-20 02:18:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95694 to 91406. [2020-07-20 02:18:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91406 states. [2020-07-20 02:18:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91406 states to 91406 states and 139668 transitions. [2020-07-20 02:18:40,423 INFO L78 Accepts]: Start accepts. Automaton has 91406 states and 139668 transitions. Word has length 334 [2020-07-20 02:18:40,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:18:40,424 INFO L479 AbstractCegarLoop]: Abstraction has 91406 states and 139668 transitions. [2020-07-20 02:18:40,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:18:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 91406 states and 139668 transitions. [2020-07-20 02:18:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 02:18:40,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:18:40,452 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:18:40,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-20 02:18:40,452 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:18:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:18:40,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1241415225, now seen corresponding path program 1 times [2020-07-20 02:18:40,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:18:40,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815756289] [2020-07-20 02:18:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:18:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:41,141 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:18:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:18:41,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815756289] [2020-07-20 02:18:41,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:18:41,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:18:41,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089264235] [2020-07-20 02:18:41,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:18:41,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:18:41,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:18:41,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:18:41,207 INFO L87 Difference]: Start difference. First operand 91406 states and 139668 transitions. Second operand 4 states. [2020-07-20 02:19:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:19:04,485 INFO L93 Difference]: Finished difference Result 270320 states and 412826 transitions. [2020-07-20 02:19:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:19:04,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-20 02:19:04,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:19:04,726 INFO L225 Difference]: With dead ends: 270320 [2020-07-20 02:19:04,726 INFO L226 Difference]: Without dead ends: 180528 [2020-07-20 02:19:04,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:19:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180528 states. [2020-07-20 02:19:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180528 to 91750. [2020-07-20 02:19:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91750 states. [2020-07-20 02:19:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91750 states to 91750 states and 140036 transitions. [2020-07-20 02:19:15,213 INFO L78 Accepts]: Start accepts. Automaton has 91750 states and 140036 transitions. Word has length 337 [2020-07-20 02:19:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:19:15,213 INFO L479 AbstractCegarLoop]: Abstraction has 91750 states and 140036 transitions. [2020-07-20 02:19:15,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:19:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 91750 states and 140036 transitions. [2020-07-20 02:19:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 02:19:15,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:19:15,243 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:19:15,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-20 02:19:15,243 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:19:15,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:19:15,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1683426062, now seen corresponding path program 1 times [2020-07-20 02:19:15,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:19:15,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803474623] [2020-07-20 02:19:15,244 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:19:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:19:16,139 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:19:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:19:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:19:16,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803474623] [2020-07-20 02:19:16,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:19:16,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:19:16,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197448724] [2020-07-20 02:19:16,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:19:16,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:19:16,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:19:16,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:19:16,263 INFO L87 Difference]: Start difference. First operand 91750 states and 140036 transitions. Second operand 4 states. [2020-07-20 02:19:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:19:39,775 INFO L93 Difference]: Finished difference Result 264309 states and 403517 transitions. [2020-07-20 02:19:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:19:39,776 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-20 02:19:39,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:19:40,008 INFO L225 Difference]: With dead ends: 264309 [2020-07-20 02:19:40,008 INFO L226 Difference]: Without dead ends: 177799 [2020-07-20 02:19:40,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:19:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177799 states. [2020-07-20 02:19:59,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177799 to 177797. [2020-07-20 02:19:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177797 states. [2020-07-20 02:20:00,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177797 states to 177797 states and 270305 transitions. [2020-07-20 02:20:00,079 INFO L78 Accepts]: Start accepts. Automaton has 177797 states and 270305 transitions. Word has length 337 [2020-07-20 02:20:00,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:20:00,079 INFO L479 AbstractCegarLoop]: Abstraction has 177797 states and 270305 transitions. [2020-07-20 02:20:00,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:20:00,079 INFO L276 IsEmpty]: Start isEmpty. Operand 177797 states and 270305 transitions. [2020-07-20 02:20:00,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 02:20:00,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:20:00,141 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:20:00,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-20 02:20:00,141 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:20:00,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:20:00,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1966579330, now seen corresponding path program 1 times [2020-07-20 02:20:00,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:20:00,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738210680] [2020-07-20 02:20:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:20:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:20:01,064 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:20:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:20:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:20:01,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738210680] [2020-07-20 02:20:01,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:20:01,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:20:01,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122226861] [2020-07-20 02:20:01,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:20:01,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:20:01,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:20:01,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:20:01,181 INFO L87 Difference]: Start difference. First operand 177797 states and 270305 transitions. Second operand 4 states. [2020-07-20 02:20:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:20:43,307 INFO L93 Difference]: Finished difference Result 512409 states and 777349 transitions. [2020-07-20 02:20:43,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:20:43,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-20 02:20:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:20:43,788 INFO L225 Difference]: With dead ends: 512409 [2020-07-20 02:20:43,788 INFO L226 Difference]: Without dead ends: 337394 [2020-07-20 02:20:43,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:20:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337394 states. [2020-07-20 02:21:16,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337394 to 337392. [2020-07-20 02:21:16,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337392 states. [2020-07-20 02:21:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337392 states to 337392 states and 507965 transitions. [2020-07-20 02:21:17,063 INFO L78 Accepts]: Start accepts. Automaton has 337392 states and 507965 transitions. Word has length 339 [2020-07-20 02:21:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:21:17,063 INFO L479 AbstractCegarLoop]: Abstraction has 337392 states and 507965 transitions. [2020-07-20 02:21:17,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:21:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 337392 states and 507965 transitions. [2020-07-20 02:21:17,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 02:21:17,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:21:17,188 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:21:17,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-20 02:21:17,188 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:21:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:21:17,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1882657510, now seen corresponding path program 1 times [2020-07-20 02:21:17,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:21:17,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451385809] [2020-07-20 02:21:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:21:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:21:18,095 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:21:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:21:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:21:18,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451385809] [2020-07-20 02:21:18,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:21:18,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:21:18,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076039998] [2020-07-20 02:21:18,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:21:18,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:21:18,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:21:18,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:21:18,168 INFO L87 Difference]: Start difference. First operand 337392 states and 507965 transitions. Second operand 5 states. [2020-07-20 02:22:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:22:03,259 INFO L93 Difference]: Finished difference Result 699505 states and 1050397 transitions. [2020-07-20 02:22:03,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:22:03,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-07-20 02:22:03,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:22:03,725 INFO L225 Difference]: With dead ends: 699505 [2020-07-20 02:22:03,726 INFO L226 Difference]: Without dead ends: 352215 [2020-07-20 02:22:03,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:22:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352215 states. [2020-07-20 02:22:40,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352215 to 352213. [2020-07-20 02:22:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352213 states. [2020-07-20 02:22:41,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352213 states to 352213 states and 526237 transitions. [2020-07-20 02:22:41,474 INFO L78 Accepts]: Start accepts. Automaton has 352213 states and 526237 transitions. Word has length 339 [2020-07-20 02:22:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:22:41,475 INFO L479 AbstractCegarLoop]: Abstraction has 352213 states and 526237 transitions. [2020-07-20 02:22:41,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:22:41,475 INFO L276 IsEmpty]: Start isEmpty. Operand 352213 states and 526237 transitions. [2020-07-20 02:22:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 02:22:41,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:22:41,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:22:41,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-20 02:22:41,607 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:22:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:22:41,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1719490276, now seen corresponding path program 1 times [2020-07-20 02:22:41,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:22:41,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138945955] [2020-07-20 02:22:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:22:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:22:43,402 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:22:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:22:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:22:43,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138945955] [2020-07-20 02:22:43,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:22:43,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:22:43,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963671323] [2020-07-20 02:22:43,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:22:43,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:22:43,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:22:43,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:22:43,482 INFO L87 Difference]: Start difference. First operand 352213 states and 526237 transitions. Second operand 4 states. [2020-07-20 02:23:50,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:23:50,181 INFO L93 Difference]: Finished difference Result 846681 states and 1282567 transitions. [2020-07-20 02:23:50,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:23:50,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-20 02:23:50,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:23:50,954 INFO L225 Difference]: With dead ends: 846681 [2020-07-20 02:23:50,954 INFO L226 Difference]: Without dead ends: 557571 [2020-07-20 02:23:51,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:23:51,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557571 states. [2020-07-20 02:24:48,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557571 to 514081. [2020-07-20 02:24:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514081 states. [2020-07-20 02:24:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514081 states to 514081 states and 776541 transitions. [2020-07-20 02:24:48,774 INFO L78 Accepts]: Start accepts. Automaton has 514081 states and 776541 transitions. Word has length 340 [2020-07-20 02:24:48,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:24:48,774 INFO L479 AbstractCegarLoop]: Abstraction has 514081 states and 776541 transitions. [2020-07-20 02:24:48,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:24:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 514081 states and 776541 transitions. [2020-07-20 02:24:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 02:24:48,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:24:48,923 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:24:48,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-20 02:24:48,924 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:24:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:24:48,924 INFO L82 PathProgramCache]: Analyzing trace with hash 989201276, now seen corresponding path program 1 times [2020-07-20 02:24:48,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:24:48,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431569209] [2020-07-20 02:24:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500571ca [2020-07-20 02:24:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:24:49,615 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:24:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:24:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:24:49,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431569209] [2020-07-20 02:24:49,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:24:49,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:24:49,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599556235] [2020-07-20 02:24:49,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:24:49,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:24:49,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:24:49,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:24:49,683 INFO L87 Difference]: Start difference. First operand 514081 states and 776541 transitions. Second operand 4 states. [2020-07-20 02:26:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:26:44,176 INFO L93 Difference]: Finished difference Result 1513801 states and 2288443 transitions. [2020-07-20 02:26:44,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:26:44,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-20 02:26:44,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:26:45,964 INFO L225 Difference]: With dead ends: 1513801 [2020-07-20 02:26:45,964 INFO L226 Difference]: Without dead ends: 1018563 [2020-07-20 02:26:46,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:26:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018563 states.