/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.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:03:03,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:03:03,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:03:03,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:03:03,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:03:03,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:03:03,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:03:03,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:03:03,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:03:03,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:03:03,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:03:03,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:03:03,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:03:03,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:03:03,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:03:03,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:03:03,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:03:03,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:03:03,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:03:03,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:03:03,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:03:03,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:03:03,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:03:03,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:03:03,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 23:03:03,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:03:03,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:03:03,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:03:03,259 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 [2020-11-06 23:03:03,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:03:03,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:03:03,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:03:03,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:03:03,290 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:03:03,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:03:03,290 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:03:03,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:03:03,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:03:03,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:03:03,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:03:03,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:03:03,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:03:03,292 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:03:03,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:03:03,292 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:03:03,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:03:03,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:03:03,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:03:03,293 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:03:03,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:03:03,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:03:03,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:03:03,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:03:03,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:03:03,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:03:03,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:03:03,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:03:03,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:03:03,295 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:03:03,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:03:03,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:03:03,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:03:03,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:03:03,720 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:03:03,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-11-06 23:03:03,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a76ad9b86/e470e0b1542f4433a95080ffd7ef31ad/FLAGd80604f0c [2020-11-06 23:03:04,717 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:03:04,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-11-06 23:03:04,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a76ad9b86/e470e0b1542f4433a95080ffd7ef31ad/FLAGd80604f0c [2020-11-06 23:03:04,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a76ad9b86/e470e0b1542f4433a95080ffd7ef31ad [2020-11-06 23:03:04,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:03:04,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:03:04,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:03:04,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:03:04,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:03:04,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:04" (1/1) ... [2020-11-06 23:03:04,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cad5941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:04, skipping insertion in model container [2020-11-06 23:03:04,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:04" (1/1) ... [2020-11-06 23:03:04,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:03:05,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:03:06,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:03:06,669 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:03:07,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:03:07,696 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:03:07,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:07 WrapperNode [2020-11-06 23:03:07,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:03:07,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:03:07,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:03:07,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:03:07,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:07" (1/1) ... [2020-11-06 23:03:07,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:07" (1/1) ... [2020-11-06 23:03:07,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:07" (1/1) ... [2020-11-06 23:03:07,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:07" (1/1) ... [2020-11-06 23:03:07,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:07" (1/1) ... [2020-11-06 23:03:07,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:07" (1/1) ... [2020-11-06 23:03:07,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:07" (1/1) ... [2020-11-06 23:03:07,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:03:07,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:03:07,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:03:07,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:03:07,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:07" (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 [2020-11-06 23:03:08,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:03:08,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:03:08,073 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:03:08,073 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:03:08,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:03:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:03:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:03:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:03:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:03:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:03:08,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:03:08,076 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:03:08,076 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:03:08,077 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:03:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:03:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:03:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:03:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:03:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:03:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-11-06 23:03:08,080 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:03:08,080 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:03:08,080 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:03:08,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:03:08,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:03:08,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:03:08,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:03:08,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:03:08,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:03:13,085 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:03:13,085 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:03:13,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:13 BoogieIcfgContainer [2020-11-06 23:03:13,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:03:13,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:03:13,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:03:13,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:03:13,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:03:04" (1/3) ... [2020-11-06 23:03:13,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222aafa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:13, skipping insertion in model container [2020-11-06 23:03:13,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:07" (2/3) ... [2020-11-06 23:03:13,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222aafa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:13, skipping insertion in model container [2020-11-06 23:03:13,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:13" (3/3) ... [2020-11-06 23:03:13,099 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-11-06 23:03:13,115 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:03:13,121 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:03:13,134 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:03:13,170 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:03:13,170 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:03:13,170 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:03:13,170 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:03:13,170 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:03:13,170 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:03:13,171 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:03:13,171 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:03:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states. [2020-11-06 23:03:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-11-06 23:03:13,258 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:13,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:13,260 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:13,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:13,267 INFO L82 PathProgramCache]: Analyzing trace with hash -937803504, now seen corresponding path program 1 times [2020-11-06 23:03:13,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:13,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619808137] [2020-11-06 23:03:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:17,191 WARN L194 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:03:17,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:17,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619808137] [2020-11-06 23:03:17,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:17,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:17,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284584349] [2020-11-06 23:03:17,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:17,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:17,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:17,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:17,677 INFO L87 Difference]: Start difference. First operand 1435 states. Second operand 5 states. [2020-11-06 23:03:34,765 WARN L194 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:03:38,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:38,127 INFO L93 Difference]: Finished difference Result 4242 states and 7640 transitions. [2020-11-06 23:03:38,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 23:03:38,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 488 [2020-11-06 23:03:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:38,203 INFO L225 Difference]: With dead ends: 4242 [2020-11-06 23:03:38,203 INFO L226 Difference]: Without dead ends: 2816 [2020-11-06 23:03:38,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:03:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2020-11-06 23:03:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2813. [2020-11-06 23:03:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2813 states. [2020-11-06 23:03:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2813 states to 2813 states and 4640 transitions. [2020-11-06 23:03:38,497 INFO L78 Accepts]: Start accepts. Automaton has 2813 states and 4640 transitions. Word has length 488 [2020-11-06 23:03:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:38,498 INFO L481 AbstractCegarLoop]: Abstraction has 2813 states and 4640 transitions. [2020-11-06 23:03:38,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:03:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2813 states and 4640 transitions. [2020-11-06 23:03:38,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-11-06 23:03:38,513 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:38,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:38,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:03:38,515 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:38,516 INFO L82 PathProgramCache]: Analyzing trace with hash 863774800, now seen corresponding path program 1 times [2020-11-06 23:03:38,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:38,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970990653] [2020-11-06 23:03:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:40,451 WARN L194 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:03:40,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:40,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970990653] [2020-11-06 23:03:40,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:40,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:40,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253908080] [2020-11-06 23:03:40,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:40,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:40,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:40,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:40,818 INFO L87 Difference]: Start difference. First operand 2813 states and 4640 transitions. Second operand 4 states. [2020-11-06 23:04:00,177 WARN L194 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 438 [2020-11-06 23:04:03,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:03,380 INFO L93 Difference]: Finished difference Result 8161 states and 13425 transitions. [2020-11-06 23:04:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:04:03,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-11-06 23:04:03,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:03,413 INFO L225 Difference]: With dead ends: 8161 [2020-11-06 23:04:03,413 INFO L226 Difference]: Without dead ends: 5562 [2020-11-06 23:04:03,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:03,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5562 states. [2020-11-06 23:04:03,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5562 to 5559. [2020-11-06 23:04:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5559 states. [2020-11-06 23:04:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 9142 transitions. [2020-11-06 23:04:03,719 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 9142 transitions. Word has length 490 [2020-11-06 23:04:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:03,721 INFO L481 AbstractCegarLoop]: Abstraction has 5559 states and 9142 transitions. [2020-11-06 23:04:03,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 9142 transitions. [2020-11-06 23:04:03,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-11-06 23:04:03,746 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:03,751 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:03,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:04:03,752 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:03,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:03,759 INFO L82 PathProgramCache]: Analyzing trace with hash -2034879086, now seen corresponding path program 1 times [2020-11-06 23:04:03,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:03,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670500353] [2020-11-06 23:04:03,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:05,245 WARN L194 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:04:05,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:05,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670500353] [2020-11-06 23:04:05,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:05,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:05,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374569956] [2020-11-06 23:04:05,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:05,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:05,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:05,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:05,498 INFO L87 Difference]: Start difference. First operand 5559 states and 9142 transitions. Second operand 4 states. [2020-11-06 23:04:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:26,165 INFO L93 Difference]: Finished difference Result 16578 states and 27257 transitions. [2020-11-06 23:04:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:04:26,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-11-06 23:04:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:26,223 INFO L225 Difference]: With dead ends: 16578 [2020-11-06 23:04:26,223 INFO L226 Difference]: Without dead ends: 11071 [2020-11-06 23:04:26,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2020-11-06 23:04:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 5606. [2020-11-06 23:04:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5606 states. [2020-11-06 23:04:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5606 states to 5606 states and 9216 transitions. [2020-11-06 23:04:26,615 INFO L78 Accepts]: Start accepts. Automaton has 5606 states and 9216 transitions. Word has length 491 [2020-11-06 23:04:26,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:26,616 INFO L481 AbstractCegarLoop]: Abstraction has 5606 states and 9216 transitions. [2020-11-06 23:04:26,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5606 states and 9216 transitions. [2020-11-06 23:04:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-11-06 23:04:26,639 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:26,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:26,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:04:26,640 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:26,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1868208885, now seen corresponding path program 1 times [2020-11-06 23:04:26,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:26,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780723260] [2020-11-06 23:04:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:28,256 WARN L194 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:04:28,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:28,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780723260] [2020-11-06 23:04:28,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:28,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:28,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875404326] [2020-11-06 23:04:28,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:28,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:28,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:28,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:28,632 INFO L87 Difference]: Start difference. First operand 5606 states and 9216 transitions. Second operand 4 states. [2020-11-06 23:04:47,632 WARN L194 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 438 [2020-11-06 23:04:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:50,895 INFO L93 Difference]: Finished difference Result 16143 states and 26447 transitions. [2020-11-06 23:04:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:04:50,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-11-06 23:04:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:50,941 INFO L225 Difference]: With dead ends: 16143 [2020-11-06 23:04:50,941 INFO L226 Difference]: Without dead ends: 10936 [2020-11-06 23:04:50,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10936 states. [2020-11-06 23:04:51,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10936 to 10933. [2020-11-06 23:04:51,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10933 states. [2020-11-06 23:04:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10933 states to 10933 states and 17886 transitions. [2020-11-06 23:04:51,407 INFO L78 Accepts]: Start accepts. Automaton has 10933 states and 17886 transitions. Word has length 492 [2020-11-06 23:04:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:51,407 INFO L481 AbstractCegarLoop]: Abstraction has 10933 states and 17886 transitions. [2020-11-06 23:04:51,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:51,408 INFO L276 IsEmpty]: Start isEmpty. Operand 10933 states and 17886 transitions. [2020-11-06 23:04:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-11-06 23:04:51,440 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:51,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:51,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:04:51,441 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:51,442 INFO L82 PathProgramCache]: Analyzing trace with hash -825376240, now seen corresponding path program 1 times [2020-11-06 23:04:51,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:51,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077484923] [2020-11-06 23:04:51,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:52,934 WARN L194 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:04:52,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:53,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077484923] [2020-11-06 23:04:53,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:53,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:53,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787938535] [2020-11-06 23:04:53,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:53,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:53,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:53,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:53,115 INFO L87 Difference]: Start difference. First operand 10933 states and 17886 transitions. Second operand 4 states. [2020-11-06 23:05:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:15,119 INFO L93 Difference]: Finished difference Result 32541 states and 53212 transitions. [2020-11-06 23:05:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:05:15,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-11-06 23:05:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:15,168 INFO L225 Difference]: With dead ends: 32541 [2020-11-06 23:05:15,168 INFO L226 Difference]: Without dead ends: 21752 [2020-11-06 23:05:15,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21752 states. [2020-11-06 23:05:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21752 to 11031. [2020-11-06 23:05:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11031 states. [2020-11-06 23:05:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11031 states to 11031 states and 18037 transitions. [2020-11-06 23:05:15,685 INFO L78 Accepts]: Start accepts. Automaton has 11031 states and 18037 transitions. Word has length 492 [2020-11-06 23:05:15,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:15,685 INFO L481 AbstractCegarLoop]: Abstraction has 11031 states and 18037 transitions. [2020-11-06 23:05:15,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:05:15,685 INFO L276 IsEmpty]: Start isEmpty. Operand 11031 states and 18037 transitions. [2020-11-06 23:05:15,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-11-06 23:05:15,712 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:15,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:05:15,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:05:15,714 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:15,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:15,714 INFO L82 PathProgramCache]: Analyzing trace with hash 542445507, now seen corresponding path program 1 times [2020-11-06 23:05:15,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:15,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677227272] [2020-11-06 23:05:15,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:17,197 WARN L194 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:05:17,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:17,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677227272] [2020-11-06 23:05:17,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:17,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:17,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104392979] [2020-11-06 23:05:17,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:17,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:17,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:17,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:17,454 INFO L87 Difference]: Start difference. First operand 11031 states and 18037 transitions. Second operand 4 states. [2020-11-06 23:05:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:40,302 INFO L93 Difference]: Finished difference Result 32676 states and 53393 transitions. [2020-11-06 23:05:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:05:40,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-11-06 23:05:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:40,347 INFO L225 Difference]: With dead ends: 32676 [2020-11-06 23:05:40,347 INFO L226 Difference]: Without dead ends: 21869 [2020-11-06 23:05:40,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:40,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21869 states. [2020-11-06 23:05:40,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21869 to 11148. [2020-11-06 23:05:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11148 states. [2020-11-06 23:05:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11148 states to 11148 states and 18183 transitions. [2020-11-06 23:05:41,002 INFO L78 Accepts]: Start accepts. Automaton has 11148 states and 18183 transitions. Word has length 493 [2020-11-06 23:05:41,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:41,003 INFO L481 AbstractCegarLoop]: Abstraction has 11148 states and 18183 transitions. [2020-11-06 23:05:41,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:05:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 11148 states and 18183 transitions. [2020-11-06 23:05:41,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-11-06 23:05:41,027 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:41,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:05:41,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:05:41,028 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:41,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1585316326, now seen corresponding path program 1 times [2020-11-06 23:05:41,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:41,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991871006] [2020-11-06 23:05:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:42,667 WARN L194 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:05:42,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:43,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991871006] [2020-11-06 23:05:43,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:43,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:43,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233416053] [2020-11-06 23:05:43,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:43,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:43,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:43,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:43,081 INFO L87 Difference]: Start difference. First operand 11148 states and 18183 transitions. Second operand 4 states. [2020-11-06 23:06:04,168 WARN L194 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 438 [2020-11-06 23:06:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:06:07,747 INFO L93 Difference]: Finished difference Result 31729 states and 51632 transitions. [2020-11-06 23:06:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:06:07,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-11-06 23:06:07,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:06:07,796 INFO L225 Difference]: With dead ends: 31729 [2020-11-06 23:06:07,796 INFO L226 Difference]: Without dead ends: 21550 [2020-11-06 23:06:07,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:06:07,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21550 states. [2020-11-06 23:06:08,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21550 to 21547. [2020-11-06 23:06:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21547 states. [2020-11-06 23:06:08,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21547 states to 21547 states and 34988 transitions. [2020-11-06 23:06:08,772 INFO L78 Accepts]: Start accepts. Automaton has 21547 states and 34988 transitions. Word has length 494 [2020-11-06 23:06:08,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:08,772 INFO L481 AbstractCegarLoop]: Abstraction has 21547 states and 34988 transitions. [2020-11-06 23:06:08,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:06:08,773 INFO L276 IsEmpty]: Start isEmpty. Operand 21547 states and 34988 transitions. [2020-11-06 23:06:08,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-11-06 23:06:08,812 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:08,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:06:08,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:06:08,813 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:08,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1721534909, now seen corresponding path program 1 times [2020-11-06 23:06:08,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:08,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75439676] [2020-11-06 23:06:08,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:11,275 WARN L194 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:06:11,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:11,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75439676] [2020-11-06 23:06:11,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:11,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:06:11,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800958015] [2020-11-06 23:06:11,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:06:11,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:11,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:06:11,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:06:11,864 INFO L87 Difference]: Start difference. First operand 21547 states and 34988 transitions. Second operand 5 states. [2020-11-06 23:06:28,244 WARN L194 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:06:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:06:32,229 INFO L93 Difference]: Finished difference Result 63145 states and 102512 transitions. [2020-11-06 23:06:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:06:32,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 494 [2020-11-06 23:06:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:06:32,305 INFO L225 Difference]: With dead ends: 63145 [2020-11-06 23:06:32,305 INFO L226 Difference]: Without dead ends: 41816 [2020-11-06 23:06:32,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:06:32,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41816 states. [2020-11-06 23:06:34,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41816 to 41813. [2020-11-06 23:06:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41813 states. [2020-11-06 23:06:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41813 states to 41813 states and 67579 transitions. [2020-11-06 23:06:34,656 INFO L78 Accepts]: Start accepts. Automaton has 41813 states and 67579 transitions. Word has length 494 [2020-11-06 23:06:34,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:34,657 INFO L481 AbstractCegarLoop]: Abstraction has 41813 states and 67579 transitions. [2020-11-06 23:06:34,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:06:34,657 INFO L276 IsEmpty]: Start isEmpty. Operand 41813 states and 67579 transitions. [2020-11-06 23:06:34,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-11-06 23:06:34,699 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:34,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:06:34,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:06:34,700 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:34,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:34,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1336718215, now seen corresponding path program 1 times [2020-11-06 23:06:34,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:34,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354497886] [2020-11-06 23:06:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:36,447 WARN L194 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:06:36,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:36,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354497886] [2020-11-06 23:06:36,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:36,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:36,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333664143] [2020-11-06 23:06:36,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:36,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:36,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:36,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:36,867 INFO L87 Difference]: Start difference. First operand 41813 states and 67579 transitions. Second operand 4 states. [2020-11-06 23:07:00,713 WARN L194 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 438 [2020-11-06 23:07:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:04,905 INFO L93 Difference]: Finished difference Result 122641 states and 198036 transitions. [2020-11-06 23:07:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:07:04,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-11-06 23:07:04,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:05,006 INFO L225 Difference]: With dead ends: 122641 [2020-11-06 23:07:05,007 INFO L226 Difference]: Without dead ends: 82370 [2020-11-06 23:07:05,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:07:05,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82370 states. [2020-11-06 23:07:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82370 to 82367. [2020-11-06 23:07:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82367 states. [2020-11-06 23:07:09,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82367 states to 82367 states and 132617 transitions. [2020-11-06 23:07:09,230 INFO L78 Accepts]: Start accepts. Automaton has 82367 states and 132617 transitions. Word has length 496 [2020-11-06 23:07:09,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:09,230 INFO L481 AbstractCegarLoop]: Abstraction has 82367 states and 132617 transitions. [2020-11-06 23:07:09,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:07:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 82367 states and 132617 transitions. [2020-11-06 23:07:09,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-11-06 23:07:09,332 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:09,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:07:09,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:07:09,333 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:09,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:09,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1875128366, now seen corresponding path program 1 times [2020-11-06 23:07:09,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:09,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282687231] [2020-11-06 23:07:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:11,327 WARN L194 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:07:11,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:07:11,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282687231] [2020-11-06 23:07:11,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:11,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:07:11,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881969986] [2020-11-06 23:07:11,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:07:11,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:11,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:07:11,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:07:11,592 INFO L87 Difference]: Start difference. First operand 82367 states and 132617 transitions. Second operand 4 states. [2020-11-06 23:07:33,580 WARN L194 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 438 [2020-11-06 23:07:33,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:33,959 INFO L93 Difference]: Finished difference Result 161141 states and 256573 transitions. [2020-11-06 23:07:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:07:33,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-11-06 23:07:33,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:34,118 INFO L225 Difference]: With dead ends: 161141 [2020-11-06 23:07:34,119 INFO L226 Difference]: Without dead ends: 110498 [2020-11-06 23:07:34,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:07:34,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110498 states. [2020-11-06 23:07:39,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110498 to 94175. [2020-11-06 23:07:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94175 states. [2020-11-06 23:07:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94175 states to 94175 states and 152041 transitions. [2020-11-06 23:07:39,403 INFO L78 Accepts]: Start accepts. Automaton has 94175 states and 152041 transitions. Word has length 496 [2020-11-06 23:07:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:39,403 INFO L481 AbstractCegarLoop]: Abstraction has 94175 states and 152041 transitions. [2020-11-06 23:07:39,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:07:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 94175 states and 152041 transitions. [2020-11-06 23:07:39,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-11-06 23:07:39,472 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:39,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:07:39,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:07:39,473 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:39,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2088889780, now seen corresponding path program 1 times [2020-11-06 23:07:39,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:39,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553798078] [2020-11-06 23:07:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:41,505 WARN L194 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:07:41,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:07:41,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553798078] [2020-11-06 23:07:41,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:41,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:07:41,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316954583] [2020-11-06 23:07:41,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:07:41,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:41,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:07:41,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:07:41,931 INFO L87 Difference]: Start difference. First operand 94175 states and 152041 transitions. Second operand 4 states. [2020-11-06 23:08:10,744 WARN L194 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 438 [2020-11-06 23:08:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:08:17,057 INFO L93 Difference]: Finished difference Result 275340 states and 443716 transitions. [2020-11-06 23:08:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:08:17,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-11-06 23:08:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:08:17,346 INFO L225 Difference]: With dead ends: 275340 [2020-11-06 23:08:17,346 INFO L226 Difference]: Without dead ends: 184873 [2020-11-06 23:08:17,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:08:17,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184873 states. [2020-11-06 23:08:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184873 to 184870. [2020-11-06 23:08:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184870 states. [2020-11-06 23:08:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184870 states to 184870 states and 297129 transitions. [2020-11-06 23:08:29,110 INFO L78 Accepts]: Start accepts. Automaton has 184870 states and 297129 transitions. Word has length 498 [2020-11-06 23:08:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:08:29,111 INFO L481 AbstractCegarLoop]: Abstraction has 184870 states and 297129 transitions. [2020-11-06 23:08:29,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:08:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 184870 states and 297129 transitions. [2020-11-06 23:08:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-11-06 23:08:29,259 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:08:29,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:08:29,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:08:29,260 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:08:29,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:08:29,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1811753647, now seen corresponding path program 1 times [2020-11-06 23:08:29,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:08:29,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512746266] [2020-11-06 23:08:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:08:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:32,199 WARN L194 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:08:32,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:08:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:08:32,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512746266] [2020-11-06 23:08:32,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:08:32,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:08:32,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16579585] [2020-11-06 23:08:32,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:08:32,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:08:32,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:08:32,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:08:32,594 INFO L87 Difference]: Start difference. First operand 184870 states and 297129 transitions. Second operand 5 states. [2020-11-06 23:09:04,724 WARN L194 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:09:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:09:14,146 INFO L93 Difference]: Finished difference Result 548990 states and 882475 transitions. [2020-11-06 23:09:14,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:09:14,147 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 498 [2020-11-06 23:09:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:09:14,963 INFO L225 Difference]: With dead ends: 548990 [2020-11-06 23:09:14,964 INFO L226 Difference]: Without dead ends: 364508 [2020-11-06 23:09:15,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:09:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364508 states. [2020-11-06 23:09:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364508 to 364505. [2020-11-06 23:09:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364505 states. [2020-11-06 23:09:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364505 states to 364505 states and 583391 transitions. [2020-11-06 23:09:38,864 INFO L78 Accepts]: Start accepts. Automaton has 364505 states and 583391 transitions. Word has length 498 [2020-11-06 23:09:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:09:38,865 INFO L481 AbstractCegarLoop]: Abstraction has 364505 states and 583391 transitions. [2020-11-06 23:09:38,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:09:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 364505 states and 583391 transitions. [2020-11-06 23:09:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-11-06 23:09:39,667 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:09:39,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:09:39,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:09:39,668 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:09:39,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:09:39,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1152777893, now seen corresponding path program 1 times [2020-11-06 23:09:39,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:09:39,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126659214] [2020-11-06 23:09:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:09:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:41,949 WARN L194 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:09:41,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:09:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:09:42,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126659214] [2020-11-06 23:09:42,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:09:42,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:09:42,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483056890] [2020-11-06 23:09:42,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:09:42,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:09:42,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:09:42,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:09:42,260 INFO L87 Difference]: Start difference. First operand 364505 states and 583391 transitions. Second operand 5 states. [2020-11-06 23:10:28,648 WARN L194 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:10:43,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:10:43,929 INFO L93 Difference]: Finished difference Result 1077461 states and 1723894 transitions. [2020-11-06 23:10:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:10:43,932 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 500 [2020-11-06 23:10:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:10:45,963 INFO L225 Difference]: With dead ends: 1077461 [2020-11-06 23:10:45,965 INFO L226 Difference]: Without dead ends: 713513 [2020-11-06 23:10:46,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:10:47,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713513 states. [2020-11-06 23:11:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713513 to 713510. [2020-11-06 23:11:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713510 states. [2020-11-06 23:11:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713510 states to 713510 states and 1136276 transitions. [2020-11-06 23:11:35,308 INFO L78 Accepts]: Start accepts. Automaton has 713510 states and 1136276 transitions. Word has length 500 [2020-11-06 23:11:35,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:11:35,309 INFO L481 AbstractCegarLoop]: Abstraction has 713510 states and 1136276 transitions. [2020-11-06 23:11:35,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:11:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 713510 states and 1136276 transitions.