/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 19:01:54,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 19:01:54,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 19:01:54,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 19:01:54,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 19:01:54,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 19:01:54,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 19:01:54,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 19:01:54,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 19:01:54,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 19:01:54,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 19:01:54,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 19:01:54,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 19:01:54,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 19:01:54,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 19:01:54,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 19:01:54,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 19:01:54,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 19:01:54,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 19:01:54,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 19:01:54,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 19:01:54,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 19:01:54,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 19:01:54,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 19:01:54,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 19:01:54,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 19:01:54,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 19:01:54,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 19:01:54,851 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 [2020-10-23 19:01:54,895 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 19:01:54,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 19:01:54,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 19:01:54,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 19:01:54,897 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 19:01:54,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 19:01:54,898 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 19:01:54,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 19:01:54,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 19:01:54,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 19:01:54,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 19:01:54,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 19:01:54,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 19:01:54,900 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 19:01:54,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 19:01:54,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 19:01:54,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 19:01:54,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 19:01:54,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 19:01:54,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 19:01:54,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 19:01:54,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 19:01:54,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 19:01:54,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 19:01:54,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 19:01:54,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 19:01:54,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 19:01:54,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 19:01:54,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 19:01:54,904 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 19:01:55,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 19:01:55,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 19:01:55,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 19:01:55,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 19:01:55,274 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 19:01:55,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-23 19:01:55,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d62238a0/fae089b9797247968bee1e8bd0f29717/FLAG270f172d9 [2020-10-23 19:01:56,101 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 19:01:56,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-23 19:01:56,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d62238a0/fae089b9797247968bee1e8bd0f29717/FLAG270f172d9 [2020-10-23 19:01:56,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d62238a0/fae089b9797247968bee1e8bd0f29717 [2020-10-23 19:01:56,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 19:01:56,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 19:01:56,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 19:01:56,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 19:01:56,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 19:01:56,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:01:56" (1/1) ... [2020-10-23 19:01:56,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@508da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:56, skipping insertion in model container [2020-10-23 19:01:56,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:01:56" (1/1) ... [2020-10-23 19:01:56,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 19:01:56,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 19:01:57,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:01:57,503 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 19:01:57,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:01:57,994 INFO L208 MainTranslator]: Completed translation [2020-10-23 19:01:57,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:57 WrapperNode [2020-10-23 19:01:57,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 19:01:57,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 19:01:57,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 19:01:57,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 19:01:58,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:57" (1/1) ... [2020-10-23 19:01:58,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:57" (1/1) ... [2020-10-23 19:01:58,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:57" (1/1) ... [2020-10-23 19:01:58,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:57" (1/1) ... [2020-10-23 19:01:58,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:57" (1/1) ... [2020-10-23 19:01:58,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:57" (1/1) ... [2020-10-23 19:01:58,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:57" (1/1) ... [2020-10-23 19:01:58,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 19:01:58,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 19:01:58,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 19:01:58,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 19:01:58,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:57" (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 [2020-10-23 19:01:58,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 19:01:58,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 19:01:58,286 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 19:01:58,286 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 19:01:58,286 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 19:01:58,286 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 19:01:58,286 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 19:01:58,286 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 19:01:58,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 19:01:58,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 19:01:58,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-23 19:01:58,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 19:01:58,287 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 19:01:58,287 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 19:01:58,288 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 19:01:58,288 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 19:01:58,288 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 19:01:58,288 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 19:01:58,288 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 19:01:58,288 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-23 19:01:58,288 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 19:01:58,289 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 19:01:58,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 19:01:58,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 19:01:58,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 19:01:58,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 19:01:58,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 19:01:58,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 19:01:58,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 19:02:00,974 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 19:02:00,974 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 19:02:00,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:02:00 BoogieIcfgContainer [2020-10-23 19:02:00,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 19:02:00,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 19:02:00,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 19:02:00,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 19:02:00,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:01:56" (1/3) ... [2020-10-23 19:02:00,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b212cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:02:00, skipping insertion in model container [2020-10-23 19:02:00,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:57" (2/3) ... [2020-10-23 19:02:00,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b212cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:02:00, skipping insertion in model container [2020-10-23 19:02:00,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:02:00" (3/3) ... [2020-10-23 19:02:00,986 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-23 19:02:00,997 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 19:02:01,003 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 19:02:01,012 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 19:02:01,044 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 19:02:01,044 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 19:02:01,044 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 19:02:01,044 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 19:02:01,044 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 19:02:01,045 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 19:02:01,045 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 19:02:01,045 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 19:02:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states. [2020-10-23 19:02:01,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-23 19:02:01,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:01,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:02:01,108 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:01,114 INFO L82 PathProgramCache]: Analyzing trace with hash 253401268, now seen corresponding path program 1 times [2020-10-23 19:02:01,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:01,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72193138] [2020-10-23 19:02:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:02,589 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:02,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:02,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72193138] [2020-10-23 19:02:02,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:02,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:02,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823596184] [2020-10-23 19:02:02,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:02,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:02,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:02,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:02,912 INFO L87 Difference]: Start difference. First operand 793 states. Second operand 4 states. [2020-10-23 19:02:03,785 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-23 19:02:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:09,382 INFO L93 Difference]: Finished difference Result 1495 states and 2629 transitions. [2020-10-23 19:02:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:09,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-23 19:02:09,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:09,417 INFO L225 Difference]: With dead ends: 1495 [2020-10-23 19:02:09,418 INFO L226 Difference]: Without dead ends: 1275 [2020-10-23 19:02:09,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:09,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2020-10-23 19:02:09,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1272. [2020-10-23 19:02:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2020-10-23 19:02:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1979 transitions. [2020-10-23 19:02:09,598 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1979 transitions. Word has length 327 [2020-10-23 19:02:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:09,604 INFO L481 AbstractCegarLoop]: Abstraction has 1272 states and 1979 transitions. [2020-10-23 19:02:09,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1979 transitions. [2020-10-23 19:02:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-23 19:02:09,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:09,622 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] [2020-10-23 19:02:09,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 19:02:09,623 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:09,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1052447530, now seen corresponding path program 1 times [2020-10-23 19:02:09,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:09,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456786038] [2020-10-23 19:02:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:10,821 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:10,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:11,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456786038] [2020-10-23 19:02:11,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:11,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:11,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113521983] [2020-10-23 19:02:11,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:11,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:11,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:11,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:11,047 INFO L87 Difference]: Start difference. First operand 1272 states and 1979 transitions. Second operand 4 states. [2020-10-23 19:02:11,751 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-23 19:02:16,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:16,299 INFO L93 Difference]: Finished difference Result 2522 states and 3952 transitions. [2020-10-23 19:02:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:16,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-23 19:02:16,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:16,315 INFO L225 Difference]: With dead ends: 2522 [2020-10-23 19:02:16,315 INFO L226 Difference]: Without dead ends: 2187 [2020-10-23 19:02:16,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-10-23 19:02:16,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2184. [2020-10-23 19:02:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-10-23 19:02:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3389 transitions. [2020-10-23 19:02:16,434 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3389 transitions. Word has length 327 [2020-10-23 19:02:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:16,435 INFO L481 AbstractCegarLoop]: Abstraction has 2184 states and 3389 transitions. [2020-10-23 19:02:16,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:16,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3389 transitions. [2020-10-23 19:02:16,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-23 19:02:16,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:16,449 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] [2020-10-23 19:02:16,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 19:02:16,450 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:16,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:16,458 INFO L82 PathProgramCache]: Analyzing trace with hash 2112533621, now seen corresponding path program 1 times [2020-10-23 19:02:16,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:16,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37823850] [2020-10-23 19:02:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:17,831 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:17,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:18,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37823850] [2020-10-23 19:02:18,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:18,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:02:18,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834350991] [2020-10-23 19:02:18,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:02:18,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:18,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:02:18,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:18,039 INFO L87 Difference]: Start difference. First operand 2184 states and 3389 transitions. Second operand 5 states. [2020-10-23 19:02:24,299 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:02:26,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:26,243 INFO L93 Difference]: Finished difference Result 6465 states and 10024 transitions. [2020-10-23 19:02:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:02:26,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-10-23 19:02:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:26,266 INFO L225 Difference]: With dead ends: 6465 [2020-10-23 19:02:26,267 INFO L226 Difference]: Without dead ends: 4296 [2020-10-23 19:02:26,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:02:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2020-10-23 19:02:26,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 4293. [2020-10-23 19:02:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4293 states. [2020-10-23 19:02:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 6627 transitions. [2020-10-23 19:02:26,444 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 6627 transitions. Word has length 327 [2020-10-23 19:02:26,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:26,444 INFO L481 AbstractCegarLoop]: Abstraction has 4293 states and 6627 transitions. [2020-10-23 19:02:26,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:02:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 6627 transitions. [2020-10-23 19:02:26,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-23 19:02:26,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:26,455 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] [2020-10-23 19:02:26,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 19:02:26,456 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:26,457 INFO L82 PathProgramCache]: Analyzing trace with hash 347310113, now seen corresponding path program 1 times [2020-10-23 19:02:26,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:26,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900366343] [2020-10-23 19:02:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:27,303 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:27,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:27,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900366343] [2020-10-23 19:02:27,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:27,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:27,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645722233] [2020-10-23 19:02:27,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:27,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:27,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:27,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:27,439 INFO L87 Difference]: Start difference. First operand 4293 states and 6627 transitions. Second operand 4 states. [2020-10-23 19:02:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:36,174 INFO L93 Difference]: Finished difference Result 12832 states and 19809 transitions. [2020-10-23 19:02:36,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:02:36,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-10-23 19:02:36,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:36,218 INFO L225 Difference]: With dead ends: 12832 [2020-10-23 19:02:36,219 INFO L226 Difference]: Without dead ends: 8564 [2020-10-23 19:02:36,228 INFO L677 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 [2020-10-23 19:02:36,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8564 states. [2020-10-23 19:02:36,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8564 to 4306. [2020-10-23 19:02:36,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4306 states. [2020-10-23 19:02:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 6646 transitions. [2020-10-23 19:02:36,464 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 6646 transitions. Word has length 329 [2020-10-23 19:02:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:36,465 INFO L481 AbstractCegarLoop]: Abstraction has 4306 states and 6646 transitions. [2020-10-23 19:02:36,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 6646 transitions. [2020-10-23 19:02:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-23 19:02:36,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:36,477 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] [2020-10-23 19:02:36,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 19:02:36,477 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:36,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1758118458, now seen corresponding path program 1 times [2020-10-23 19:02:36,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:36,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439451857] [2020-10-23 19:02:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:37,301 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:37,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:37,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439451857] [2020-10-23 19:02:37,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:37,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:37,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141091464] [2020-10-23 19:02:37,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:37,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:37,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:37,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:37,451 INFO L87 Difference]: Start difference. First operand 4306 states and 6646 transitions. Second operand 4 states. [2020-10-23 19:02:44,914 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-23 19:02:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:46,814 INFO L93 Difference]: Finished difference Result 12597 states and 19397 transitions. [2020-10-23 19:02:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:46,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-10-23 19:02:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:46,853 INFO L225 Difference]: With dead ends: 12597 [2020-10-23 19:02:46,854 INFO L226 Difference]: Without dead ends: 8433 [2020-10-23 19:02:46,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8433 states. [2020-10-23 19:02:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8433 to 8430. [2020-10-23 19:02:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8430 states. [2020-10-23 19:02:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8430 states to 8430 states and 12936 transitions. [2020-10-23 19:02:47,255 INFO L78 Accepts]: Start accepts. Automaton has 8430 states and 12936 transitions. Word has length 329 [2020-10-23 19:02:47,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:47,256 INFO L481 AbstractCegarLoop]: Abstraction has 8430 states and 12936 transitions. [2020-10-23 19:02:47,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 8430 states and 12936 transitions. [2020-10-23 19:02:47,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-23 19:02:47,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:47,274 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] [2020-10-23 19:02:47,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 19:02:47,279 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:47,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:47,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1275662638, now seen corresponding path program 1 times [2020-10-23 19:02:47,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:47,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482835986] [2020-10-23 19:02:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:48,062 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:48,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:48,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482835986] [2020-10-23 19:02:48,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:48,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:48,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862092383] [2020-10-23 19:02:48,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:48,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:48,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:48,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:48,179 INFO L87 Difference]: Start difference. First operand 8430 states and 12936 transitions. Second operand 4 states. [2020-10-23 19:02:57,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:57,280 INFO L93 Difference]: Finished difference Result 25175 states and 38620 transitions. [2020-10-23 19:02:57,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:02:57,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-10-23 19:02:57,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:57,316 INFO L225 Difference]: With dead ends: 25175 [2020-10-23 19:02:57,316 INFO L226 Difference]: Without dead ends: 16805 [2020-10-23 19:02:57,338 INFO L677 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 [2020-10-23 19:02:57,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16805 states. [2020-10-23 19:02:57,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16805 to 8448. [2020-10-23 19:02:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8448 states. [2020-10-23 19:02:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8448 states to 8448 states and 12957 transitions. [2020-10-23 19:02:57,876 INFO L78 Accepts]: Start accepts. Automaton has 8448 states and 12957 transitions. Word has length 330 [2020-10-23 19:02:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:57,876 INFO L481 AbstractCegarLoop]: Abstraction has 8448 states and 12957 transitions. [2020-10-23 19:02:57,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 8448 states and 12957 transitions. [2020-10-23 19:02:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-23 19:02:57,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:57,892 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] [2020-10-23 19:02:57,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 19:02:57,892 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:57,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash -688908789, now seen corresponding path program 1 times [2020-10-23 19:02:57,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:57,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516930046] [2020-10-23 19:02:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:58,690 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:58,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:58,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516930046] [2020-10-23 19:02:58,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:58,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:58,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368853500] [2020-10-23 19:02:58,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:58,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:58,877 INFO L87 Difference]: Start difference. First operand 8448 states and 12957 transitions. Second operand 4 states. [2020-10-23 19:03:06,561 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-23 19:03:08,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:08,589 INFO L93 Difference]: Finished difference Result 24665 states and 37728 transitions. [2020-10-23 19:03:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:03:08,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-23 19:03:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:08,624 INFO L225 Difference]: With dead ends: 24665 [2020-10-23 19:03:08,625 INFO L226 Difference]: Without dead ends: 16462 [2020-10-23 19:03:08,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16462 states. [2020-10-23 19:03:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16462 to 16459. [2020-10-23 19:03:09,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16459 states. [2020-10-23 19:03:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16459 states to 16459 states and 25069 transitions. [2020-10-23 19:03:09,540 INFO L78 Accepts]: Start accepts. Automaton has 16459 states and 25069 transitions. Word has length 331 [2020-10-23 19:03:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:09,541 INFO L481 AbstractCegarLoop]: Abstraction has 16459 states and 25069 transitions. [2020-10-23 19:03:09,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:03:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 16459 states and 25069 transitions. [2020-10-23 19:03:09,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-23 19:03:09,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:09,568 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] [2020-10-23 19:03:09,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 19:03:09,569 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:09,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:09,569 INFO L82 PathProgramCache]: Analyzing trace with hash -592962034, now seen corresponding path program 1 times [2020-10-23 19:03:09,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:09,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144283867] [2020-10-23 19:03:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:10,565 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:03:10,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:10,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144283867] [2020-10-23 19:03:10,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:10,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:03:10,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028443757] [2020-10-23 19:03:10,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:03:10,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:10,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:03:10,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:10,864 INFO L87 Difference]: Start difference. First operand 16459 states and 25069 transitions. Second operand 5 states. [2020-10-23 19:03:17,595 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:03:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:19,914 INFO L93 Difference]: Finished difference Result 48575 states and 73864 transitions. [2020-10-23 19:03:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:03:19,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-23 19:03:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:19,974 INFO L225 Difference]: With dead ends: 48575 [2020-10-23 19:03:19,974 INFO L226 Difference]: Without dead ends: 32175 [2020-10-23 19:03:20,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:03:20,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32175 states. [2020-10-23 19:03:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32175 to 32172. [2020-10-23 19:03:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32172 states. [2020-10-23 19:03:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32172 states to 32172 states and 48662 transitions. [2020-10-23 19:03:21,696 INFO L78 Accepts]: Start accepts. Automaton has 32172 states and 48662 transitions. Word has length 331 [2020-10-23 19:03:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:21,697 INFO L481 AbstractCegarLoop]: Abstraction has 32172 states and 48662 transitions. [2020-10-23 19:03:21,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:03:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 32172 states and 48662 transitions. [2020-10-23 19:03:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-23 19:03:21,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:21,754 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] [2020-10-23 19:03:21,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 19:03:21,754 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:21,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2071890782, now seen corresponding path program 1 times [2020-10-23 19:03:21,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:21,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981598063] [2020-10-23 19:03:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:22,887 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:03:22,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:23,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981598063] [2020-10-23 19:03:23,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:23,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:03:23,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851294250] [2020-10-23 19:03:23,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:03:23,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:23,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:03:23,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:23,074 INFO L87 Difference]: Start difference. First operand 32172 states and 48662 transitions. Second operand 5 states. [2020-10-23 19:03:30,640 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:03:33,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:33,489 INFO L93 Difference]: Finished difference Result 94842 states and 143206 transitions. [2020-10-23 19:03:33,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:03:33,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-10-23 19:03:33,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:33,617 INFO L225 Difference]: With dead ends: 94842 [2020-10-23 19:03:33,617 INFO L226 Difference]: Without dead ends: 62871 [2020-10-23 19:03:33,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:03:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62871 states. [2020-10-23 19:03:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62871 to 62868. [2020-10-23 19:03:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62868 states. [2020-10-23 19:03:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62868 states to 62868 states and 94373 transitions. [2020-10-23 19:03:36,821 INFO L78 Accepts]: Start accepts. Automaton has 62868 states and 94373 transitions. Word has length 333 [2020-10-23 19:03:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:36,821 INFO L481 AbstractCegarLoop]: Abstraction has 62868 states and 94373 transitions. [2020-10-23 19:03:36,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:03:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 62868 states and 94373 transitions. [2020-10-23 19:03:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-23 19:03:36,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:36,879 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] [2020-10-23 19:03:36,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 19:03:36,879 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:36,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:36,879 INFO L82 PathProgramCache]: Analyzing trace with hash 618089564, now seen corresponding path program 1 times [2020-10-23 19:03:36,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:36,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085555652] [2020-10-23 19:03:36,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:37,961 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:03:37,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:38,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085555652] [2020-10-23 19:03:38,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:38,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:03:38,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151219051] [2020-10-23 19:03:38,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:03:38,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:38,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:03:38,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:03:38,210 INFO L87 Difference]: Start difference. First operand 62868 states and 94373 transitions. Second operand 4 states. [2020-10-23 19:03:49,012 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-23 19:03:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:52,671 INFO L93 Difference]: Finished difference Result 184972 states and 277031 transitions. [2020-10-23 19:03:52,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:03:52,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-10-23 19:03:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:52,888 INFO L225 Difference]: With dead ends: 184972 [2020-10-23 19:03:52,888 INFO L226 Difference]: Without dead ends: 123001 [2020-10-23 19:03:52,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123001 states. [2020-10-23 19:03:58,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123001 to 122998. [2020-10-23 19:03:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122998 states. [2020-10-23 19:03:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122998 states to 122998 states and 183255 transitions. [2020-10-23 19:03:58,989 INFO L78 Accepts]: Start accepts. Automaton has 122998 states and 183255 transitions. Word has length 335 [2020-10-23 19:03:58,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:58,989 INFO L481 AbstractCegarLoop]: Abstraction has 122998 states and 183255 transitions. [2020-10-23 19:03:58,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:03:58,989 INFO L276 IsEmpty]: Start isEmpty. Operand 122998 states and 183255 transitions. [2020-10-23 19:03:59,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-23 19:03:59,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:59,364 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] [2020-10-23 19:03:59,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 19:03:59,365 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:59,366 INFO L82 PathProgramCache]: Analyzing trace with hash -2012793097, now seen corresponding path program 1 times [2020-10-23 19:03:59,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:59,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125858828] [2020-10-23 19:03:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:00,126 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:04:00,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:04:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:04:00,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125858828] [2020-10-23 19:04:00,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:04:00,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:04:00,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470116950] [2020-10-23 19:04:00,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:04:00,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:04:00,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:04:00,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:04:00,417 INFO L87 Difference]: Start difference. First operand 122998 states and 183255 transitions. Second operand 4 states. [2020-10-23 19:04:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:04:19,579 INFO L93 Difference]: Finished difference Result 368188 states and 548450 transitions. [2020-10-23 19:04:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:04:19,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-10-23 19:04:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:04:20,146 INFO L225 Difference]: With dead ends: 368188 [2020-10-23 19:04:20,146 INFO L226 Difference]: Without dead ends: 245637 [2020-10-23 19:04:20,283 INFO L677 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 [2020-10-23 19:04:20,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245637 states. [2020-10-23 19:04:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245637 to 123188. [2020-10-23 19:04:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123188 states. [2020-10-23 19:04:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123188 states to 123188 states and 183535 transitions. [2020-10-23 19:04:27,737 INFO L78 Accepts]: Start accepts. Automaton has 123188 states and 183535 transitions. Word has length 335 [2020-10-23 19:04:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:04:27,737 INFO L481 AbstractCegarLoop]: Abstraction has 123188 states and 183535 transitions. [2020-10-23 19:04:27,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:04:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 123188 states and 183535 transitions. [2020-10-23 19:04:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-10-23 19:04:27,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:04:27,821 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] [2020-10-23 19:04:27,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 19:04:27,821 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:04:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:04:27,821 INFO L82 PathProgramCache]: Analyzing trace with hash 369574786, now seen corresponding path program 1 times [2020-10-23 19:04:27,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:04:27,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48031795] [2020-10-23 19:04:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:04:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:28,791 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:04:28,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:04:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:04:28,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48031795] [2020-10-23 19:04:28,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:04:28,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:04:28,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590859639] [2020-10-23 19:04:28,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:04:28,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:04:28,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:04:28,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:04:28,910 INFO L87 Difference]: Start difference. First operand 123188 states and 183535 transitions. Second operand 4 states. [2020-10-23 19:04:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:04:49,442 INFO L93 Difference]: Finished difference Result 368300 states and 548528 transitions. [2020-10-23 19:04:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:04:49,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-10-23 19:04:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:04:49,970 INFO L225 Difference]: With dead ends: 368300 [2020-10-23 19:04:49,976 INFO L226 Difference]: Without dead ends: 245799 [2020-10-23 19:04:50,079 INFO L677 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 [2020-10-23 19:04:50,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245799 states. [2020-10-23 19:04:57,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245799 to 123350. [2020-10-23 19:04:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123350 states. [2020-10-23 19:04:57,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123350 states to 123350 states and 183721 transitions. [2020-10-23 19:04:57,676 INFO L78 Accepts]: Start accepts. Automaton has 123350 states and 183721 transitions. Word has length 336 [2020-10-23 19:04:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:04:57,676 INFO L481 AbstractCegarLoop]: Abstraction has 123350 states and 183721 transitions. [2020-10-23 19:04:57,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:04:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 123350 states and 183721 transitions. [2020-10-23 19:04:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-23 19:04:57,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:04:57,751 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] [2020-10-23 19:04:57,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 19:04:57,752 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:04:57,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:04:57,752 INFO L82 PathProgramCache]: Analyzing trace with hash -959930463, now seen corresponding path program 1 times [2020-10-23 19:04:57,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:04:57,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198695900] [2020-10-23 19:04:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:04:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:58,789 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:04:58,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:04:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:04:58,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198695900] [2020-10-23 19:04:58,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:04:58,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:04:58,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81856376] [2020-10-23 19:04:58,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:04:58,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:04:58,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:04:58,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:04:58,927 INFO L87 Difference]: Start difference. First operand 123350 states and 183721 transitions. Second operand 4 states. [2020-10-23 19:05:14,404 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-23 19:05:20,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:05:20,382 INFO L93 Difference]: Finished difference Result 350474 states and 520833 transitions. [2020-10-23 19:05:20,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:05:20,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-10-23 19:05:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:05:20,723 INFO L225 Difference]: With dead ends: 350474 [2020-10-23 19:05:20,723 INFO L226 Difference]: Without dead ends: 228671 [2020-10-23 19:05:20,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:05:21,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228671 states. [2020-10-23 19:05:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228671 to 228668. [2020-10-23 19:05:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228668 states. [2020-10-23 19:05:34,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228668 states to 228668 states and 337747 transitions. [2020-10-23 19:05:34,382 INFO L78 Accepts]: Start accepts. Automaton has 228668 states and 337747 transitions. Word has length 337 [2020-10-23 19:05:34,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:05:34,383 INFO L481 AbstractCegarLoop]: Abstraction has 228668 states and 337747 transitions. [2020-10-23 19:05:34,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:05:34,383 INFO L276 IsEmpty]: Start isEmpty. Operand 228668 states and 337747 transitions. [2020-10-23 19:05:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-23 19:05:34,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:34,536 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] [2020-10-23 19:05:34,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 19:05:34,536 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash -652499484, now seen corresponding path program 1 times [2020-10-23 19:05:34,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:34,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377312599] [2020-10-23 19:05:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:35,903 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:05:35,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:05:36,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377312599] [2020-10-23 19:05:36,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:36,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:05:36,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891455294] [2020-10-23 19:05:36,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:05:36,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:36,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:05:36,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:05:36,116 INFO L87 Difference]: Start difference. First operand 228668 states and 337747 transitions. Second operand 5 states. [2020-10-23 19:05:58,055 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:06:09,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:09,863 INFO L93 Difference]: Finished difference Result 673596 states and 992687 transitions. [2020-10-23 19:06:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:06:09,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-10-23 19:06:09,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:11,294 INFO L225 Difference]: With dead ends: 673596 [2020-10-23 19:06:11,294 INFO L226 Difference]: Without dead ends: 445551 [2020-10-23 19:06:11,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:06:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445551 states.