/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:26:21,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:26:21,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:26:21,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 02:26:21,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 02:26:21,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 02:26:21,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 02:26:21,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 02:26:21,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 02:26:21,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 02:26:21,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 02:26:21,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 02:26:21,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:26:21,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:26:21,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:26:21,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:26:21,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:26:21,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:26:21,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:26:21,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:26:21,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:26:21,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:26:21,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:26:21,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:26:21,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 02:26:21,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 02:26:21,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 02:26:21,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 02:26:21,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 02:26:21,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 02:26:21,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 02:26:21,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 02:26:21,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 02:26:21,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:26:21,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:26:21,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:26:21,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:26:21,310 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:26:21,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:26:21,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:26:21,312 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:26:21,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:26:21,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:26:21,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:26:21,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:26:21,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:26:21,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:26:21,314 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:26:21,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:26:21,314 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:26:21,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:26:21,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:26:21,315 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:26:21,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:26:21,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:26:21,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:26:21,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:26:21,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:26:21,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:26:21,317 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:26:21,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:26:21,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:26:21,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:26:21,712 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:26:21,712 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:26:21,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-07 02:26:21,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f3eb08bc/1859f265b1a643c1bbe10b3517821312/FLAG9136be2ce [2020-11-07 02:26:22,562 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:26:22,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-07 02:26:22,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f3eb08bc/1859f265b1a643c1bbe10b3517821312/FLAG9136be2ce [2020-11-07 02:26:22,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f3eb08bc/1859f265b1a643c1bbe10b3517821312 [2020-11-07 02:26:22,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:26:22,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:26:22,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:26:22,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:26:22,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:26:22,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:26:22" (1/1) ... [2020-11-07 02:26:22,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a75650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:22, skipping insertion in model container [2020-11-07 02:26:22,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:26:22" (1/1) ... [2020-11-07 02:26:22,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:26:22,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:26:23,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:26:23,501 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:26:23,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:26:23,735 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:26:23,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:23 WrapperNode [2020-11-07 02:26:23,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:26:23,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:26:23,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:26:23,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:26:23,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:23" (1/1) ... [2020-11-07 02:26:23,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:23" (1/1) ... [2020-11-07 02:26:23,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:23" (1/1) ... [2020-11-07 02:26:23,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:23" (1/1) ... [2020-11-07 02:26:23,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:23" (1/1) ... [2020-11-07 02:26:23,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:23" (1/1) ... [2020-11-07 02:26:23,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:23" (1/1) ... [2020-11-07 02:26:23,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:26:23,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:26:23,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:26:23,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:26:23,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:23" (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 [2020-11-07 02:26:23,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:26:23,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:26:23,938 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:26:23,938 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:26:23,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:26:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:26:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:26:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:26:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:26:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-07 02:26:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-11-07 02:26:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-07 02:26:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-07 02:26:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:26:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-07 02:26:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-07 02:26:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-07 02:26:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-07 02:26:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-07 02:26:23,941 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-07 02:26:23,941 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-07 02:26:23,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:26:23,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:26:23,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:26:23,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:26:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:26:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:26:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:26:25,863 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:26:25,863 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 02:26:25,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:26:25 BoogieIcfgContainer [2020-11-07 02:26:25,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:26:25,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:26:25,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:26:25,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:26:25,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:26:22" (1/3) ... [2020-11-07 02:26:25,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2230323a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:26:25, skipping insertion in model container [2020-11-07 02:26:25,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:23" (2/3) ... [2020-11-07 02:26:25,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2230323a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:26:25, skipping insertion in model container [2020-11-07 02:26:25,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:26:25" (3/3) ... [2020-11-07 02:26:25,884 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-07 02:26:25,899 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:26:25,903 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:26:25,917 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:26:25,942 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:26:25,942 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:26:25,943 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:26:25,943 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:26:25,943 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:26:25,943 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:26:25,943 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:26:25,943 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:26:25,976 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states. [2020-11-07 02:26:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-11-07 02:26:26,016 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:26:26,018 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] [2020-11-07 02:26:26,018 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:26:26,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:26:26,026 INFO L82 PathProgramCache]: Analyzing trace with hash -552598101, now seen corresponding path program 1 times [2020-11-07 02:26:26,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:26:26,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707250658] [2020-11-07 02:26:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:26:26,129 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:26:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:27,307 WARN L194 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-11-07 02:26:27,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:26:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:26:27,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707250658] [2020-11-07 02:26:27,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:26:27,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:26:27,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270607600] [2020-11-07 02:26:27,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:26:27,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:26:27,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:26:27,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:26:27,776 INFO L87 Difference]: Start difference. First operand 914 states. Second operand 4 states. [2020-11-07 02:26:31,432 WARN L194 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-11-07 02:26:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:26:32,273 INFO L93 Difference]: Finished difference Result 1621 states and 2120 transitions. [2020-11-07 02:26:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:26:32,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 458 [2020-11-07 02:26:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:26:32,317 INFO L225 Difference]: With dead ends: 1621 [2020-11-07 02:26:32,317 INFO L226 Difference]: Without dead ends: 1231 [2020-11-07 02:26:32,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:26:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2020-11-07 02:26:32,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1223. [2020-11-07 02:26:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1223 states. [2020-11-07 02:26:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1498 transitions. [2020-11-07 02:26:32,549 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1498 transitions. Word has length 458 [2020-11-07 02:26:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:26:32,552 INFO L481 AbstractCegarLoop]: Abstraction has 1223 states and 1498 transitions. [2020-11-07 02:26:32,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:26:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1498 transitions. [2020-11-07 02:26:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-11-07 02:26:32,563 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:26:32,563 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] [2020-11-07 02:26:32,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:26:32,564 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:26:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:26:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash 31400235, now seen corresponding path program 1 times [2020-11-07 02:26:32,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:26:32,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833527144] [2020-11-07 02:26:32,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:26:32,573 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:26:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:33,465 WARN L194 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-11-07 02:26:33,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:26:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:26:33,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833527144] [2020-11-07 02:26:33,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:26:33,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:26:33,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909437497] [2020-11-07 02:26:33,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:26:33,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:26:33,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:26:33,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:26:33,896 INFO L87 Difference]: Start difference. First operand 1223 states and 1498 transitions. Second operand 5 states. [2020-11-07 02:26:37,880 WARN L194 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-11-07 02:26:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:26:39,356 INFO L93 Difference]: Finished difference Result 3234 states and 4027 transitions. [2020-11-07 02:26:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 02:26:39,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 458 [2020-11-07 02:26:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:26:39,370 INFO L225 Difference]: With dead ends: 3234 [2020-11-07 02:26:39,371 INFO L226 Difference]: Without dead ends: 2199 [2020-11-07 02:26:39,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:26:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2020-11-07 02:26:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2196. [2020-11-07 02:26:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2196 states. [2020-11-07 02:26:39,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 2709 transitions. [2020-11-07 02:26:39,537 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 2709 transitions. Word has length 458 [2020-11-07 02:26:39,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:26:39,538 INFO L481 AbstractCegarLoop]: Abstraction has 2196 states and 2709 transitions. [2020-11-07 02:26:39,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:26:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 2709 transitions. [2020-11-07 02:26:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-11-07 02:26:39,551 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:26:39,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:26:39,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:26:39,553 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:26:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:26:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1011082464, now seen corresponding path program 1 times [2020-11-07 02:26:39,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:26:39,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811782700] [2020-11-07 02:26:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:26:39,558 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:26:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:40,022 WARN L194 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-11-07 02:26:40,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:26:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:26:40,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811782700] [2020-11-07 02:26:40,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:26:40,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:26:40,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775455506] [2020-11-07 02:26:40,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:26:40,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:26:40,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:26:40,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:26:40,290 INFO L87 Difference]: Start difference. First operand 2196 states and 2709 transitions. Second operand 4 states. [2020-11-07 02:26:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:26:44,356 INFO L93 Difference]: Finished difference Result 6173 states and 7689 transitions. [2020-11-07 02:26:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 02:26:44,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 459 [2020-11-07 02:26:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:26:44,378 INFO L225 Difference]: With dead ends: 6173 [2020-11-07 02:26:44,378 INFO L226 Difference]: Without dead ends: 4199 [2020-11-07 02:26:44,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:26:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2020-11-07 02:26:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 2198. [2020-11-07 02:26:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2198 states. [2020-11-07 02:26:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 2711 transitions. [2020-11-07 02:26:44,566 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 2711 transitions. Word has length 459 [2020-11-07 02:26:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:26:44,567 INFO L481 AbstractCegarLoop]: Abstraction has 2198 states and 2711 transitions. [2020-11-07 02:26:44,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:26:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 2711 transitions. [2020-11-07 02:26:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-11-07 02:26:44,577 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:26:44,578 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] [2020-11-07 02:26:44,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:26:44,578 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:26:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:26:44,579 INFO L82 PathProgramCache]: Analyzing trace with hash 942330551, now seen corresponding path program 1 times [2020-11-07 02:26:44,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:26:44,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456026784] [2020-11-07 02:26:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:26:44,584 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:26:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:45,154 WARN L194 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-11-07 02:26:45,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:26:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:26:45,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456026784] [2020-11-07 02:26:45,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:26:45,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:26:45,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229091174] [2020-11-07 02:26:45,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:26:45,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:26:45,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:26:45,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:26:45,394 INFO L87 Difference]: Start difference. First operand 2198 states and 2711 transitions. Second operand 5 states. [2020-11-07 02:26:49,297 WARN L194 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-11-07 02:26:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:26:50,723 INFO L93 Difference]: Finished difference Result 6026 states and 7491 transitions. [2020-11-07 02:26:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 02:26:50,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 460 [2020-11-07 02:26:50,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:26:50,748 INFO L225 Difference]: With dead ends: 6026 [2020-11-07 02:26:50,749 INFO L226 Difference]: Without dead ends: 4053 [2020-11-07 02:26:50,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:26:50,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2020-11-07 02:26:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 4050. [2020-11-07 02:26:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4050 states. [2020-11-07 02:26:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4050 states to 4050 states and 4998 transitions. [2020-11-07 02:26:51,144 INFO L78 Accepts]: Start accepts. Automaton has 4050 states and 4998 transitions. Word has length 460 [2020-11-07 02:26:51,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:26:51,145 INFO L481 AbstractCegarLoop]: Abstraction has 4050 states and 4998 transitions. [2020-11-07 02:26:51,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:26:51,146 INFO L276 IsEmpty]: Start isEmpty. Operand 4050 states and 4998 transitions. [2020-11-07 02:26:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-11-07 02:26:51,159 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:26:51,159 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] [2020-11-07 02:26:51,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:26:51,160 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:26:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:26:51,161 INFO L82 PathProgramCache]: Analyzing trace with hash 453942824, now seen corresponding path program 1 times [2020-11-07 02:26:51,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:26:51,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748266297] [2020-11-07 02:26:51,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:26:51,168 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:26:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:51,630 WARN L194 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-11-07 02:26:51,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:26:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:26:51,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748266297] [2020-11-07 02:26:51,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:26:51,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:26:51,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32709170] [2020-11-07 02:26:51,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:26:51,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:26:51,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:26:51,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:26:51,862 INFO L87 Difference]: Start difference. First operand 4050 states and 4998 transitions. Second operand 4 states. [2020-11-07 02:26:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:26:55,867 INFO L93 Difference]: Finished difference Result 11672 states and 14473 transitions. [2020-11-07 02:26:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 02:26:55,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 461 [2020-11-07 02:26:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:26:55,902 INFO L225 Difference]: With dead ends: 11672 [2020-11-07 02:26:55,902 INFO L226 Difference]: Without dead ends: 7867 [2020-11-07 02:26:55,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:26:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7867 states. [2020-11-07 02:26:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7867 to 4054. [2020-11-07 02:26:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4054 states. [2020-11-07 02:26:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4054 states to 4054 states and 5002 transitions. [2020-11-07 02:26:56,356 INFO L78 Accepts]: Start accepts. Automaton has 4054 states and 5002 transitions. Word has length 461 [2020-11-07 02:26:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:26:56,357 INFO L481 AbstractCegarLoop]: Abstraction has 4054 states and 5002 transitions. [2020-11-07 02:26:56,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:26:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 4054 states and 5002 transitions. [2020-11-07 02:26:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-11-07 02:26:56,365 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:26:56,366 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] [2020-11-07 02:26:56,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:26:56,366 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:26:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:26:56,367 INFO L82 PathProgramCache]: Analyzing trace with hash -413045093, now seen corresponding path program 1 times [2020-11-07 02:26:56,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:26:56,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190197854] [2020-11-07 02:26:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:26:56,371 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:26:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:56,932 WARN L194 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-11-07 02:26:56,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:26:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:26:57,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190197854] [2020-11-07 02:26:57,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:26:57,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:26:57,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006889806] [2020-11-07 02:26:57,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:26:57,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:26:57,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:26:57,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:26:57,179 INFO L87 Difference]: Start difference. First operand 4054 states and 5002 transitions. Second operand 5 states. [2020-11-07 02:27:01,398 WARN L194 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-11-07 02:27:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:27:02,980 INFO L93 Difference]: Finished difference Result 11416 states and 14132 transitions. [2020-11-07 02:27:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 02:27:02,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 462 [2020-11-07 02:27:02,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:27:03,016 INFO L225 Difference]: With dead ends: 11416 [2020-11-07 02:27:03,016 INFO L226 Difference]: Without dead ends: 7613 [2020-11-07 02:27:03,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:27:03,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7613 states. [2020-11-07 02:27:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7613 to 7610. [2020-11-07 02:27:03,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7610 states. [2020-11-07 02:27:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7610 states to 7610 states and 9356 transitions. [2020-11-07 02:27:03,911 INFO L78 Accepts]: Start accepts. Automaton has 7610 states and 9356 transitions. Word has length 462 [2020-11-07 02:27:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:27:03,912 INFO L481 AbstractCegarLoop]: Abstraction has 7610 states and 9356 transitions. [2020-11-07 02:27:03,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:27:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7610 states and 9356 transitions. [2020-11-07 02:27:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-11-07 02:27:03,927 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:27:03,927 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] [2020-11-07 02:27:03,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:27:03,927 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:27:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:27:03,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1601859544, now seen corresponding path program 1 times [2020-11-07 02:27:03,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:27:03,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87040675] [2020-11-07 02:27:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:27:03,932 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:27:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:27:04,459 WARN L194 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-11-07 02:27:04,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:27:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:27:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:27:04,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87040675] [2020-11-07 02:27:04,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:27:04,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:27:04,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827244393] [2020-11-07 02:27:04,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:27:04,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:27:04,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:27:04,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:27:04,651 INFO L87 Difference]: Start difference. First operand 7610 states and 9356 transitions. Second operand 4 states. [2020-11-07 02:27:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:27:09,409 INFO L93 Difference]: Finished difference Result 21842 states and 26935 transitions. [2020-11-07 02:27:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 02:27:09,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 463 [2020-11-07 02:27:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:27:09,459 INFO L225 Difference]: With dead ends: 21842 [2020-11-07 02:27:09,459 INFO L226 Difference]: Without dead ends: 14891 [2020-11-07 02:27:09,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:27:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14891 states. [2020-11-07 02:27:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14891 to 7618. [2020-11-07 02:27:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7618 states. [2020-11-07 02:27:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7618 states to 7618 states and 9364 transitions. [2020-11-07 02:27:10,378 INFO L78 Accepts]: Start accepts. Automaton has 7618 states and 9364 transitions. Word has length 463 [2020-11-07 02:27:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:27:10,379 INFO L481 AbstractCegarLoop]: Abstraction has 7618 states and 9364 transitions. [2020-11-07 02:27:10,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:27:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 7618 states and 9364 transitions. [2020-11-07 02:27:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-11-07 02:27:10,395 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:27:10,397 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] [2020-11-07 02:27:10,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 02:27:10,397 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:27:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:27:10,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1061633321, now seen corresponding path program 1 times [2020-11-07 02:27:10,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:27:10,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773790548] [2020-11-07 02:27:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:27:10,403 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:27:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:27:10,485 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:27:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:27:10,580 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:27:11,062 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 02:27:11,063 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 02:27:11,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 02:27:11,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:27:11 BoogieIcfgContainer [2020-11-07 02:27:11,141 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 02:27:11,143 INFO L168 Benchmark]: Toolchain (without parser) took 48296.63 ms. Allocated memory was 151.0 MB in the beginning and 964.7 MB in the end (delta: 813.7 MB). Free memory was 126.6 MB in the beginning and 444.4 MB in the end (delta: -317.8 MB). Peak memory consumption was 497.2 MB. Max. memory is 8.0 GB. [2020-11-07 02:27:11,144 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 125.4 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 02:27:11,145 INFO L168 Benchmark]: CACSL2BoogieTranslator took 882.12 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 129.2 MB in the end (delta: -3.2 MB). Peak memory consumption was 29.7 MB. Max. memory is 8.0 GB. [2020-11-07 02:27:11,146 INFO L168 Benchmark]: Boogie Preprocessor took 105.39 ms. Allocated memory is still 151.0 MB. Free memory was 129.2 MB in the beginning and 124.5 MB in the end (delta: 4.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-11-07 02:27:11,146 INFO L168 Benchmark]: RCFGBuilder took 2022.39 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 124.5 MB in the beginning and 116.4 MB in the end (delta: 8.1 MB). Peak memory consumption was 67.3 MB. Max. memory is 8.0 GB. [2020-11-07 02:27:11,148 INFO L168 Benchmark]: TraceAbstraction took 45273.04 ms. Allocated memory was 182.5 MB in the beginning and 964.7 MB in the end (delta: 782.2 MB). Free memory was 115.9 MB in the beginning and 444.4 MB in the end (delta: -328.5 MB). Peak memory consumption was 453.7 MB. Max. memory is 8.0 GB. [2020-11-07 02:27:11,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 125.4 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 882.12 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 129.2 MB in the end (delta: -3.2 MB). Peak memory consumption was 29.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 105.39 ms. Allocated memory is still 151.0 MB. Free memory was 129.2 MB in the beginning and 124.5 MB in the end (delta: 4.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 2022.39 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 124.5 MB in the beginning and 116.4 MB in the end (delta: 8.1 MB). Peak memory consumption was 67.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 45273.04 ms. Allocated memory was 182.5 MB in the beginning and 964.7 MB in the end (delta: 782.2 MB). Free memory was 115.9 MB in the beginning and 444.4 MB in the end (delta: -328.5 MB). Peak memory consumption was 453.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1] int __return_main; [L17] msg_t nomsg = (msg_t )-1; [L18] port_t p12 = 0; [L19] char p12_old = '\x0'; [L20] char p12_new = '\x0'; [L21] _Bool ep12 = 0; [L22] port_t p13 = 0; [L23] char p13_old = '\x0'; [L24] char p13_new = '\x0'; [L25] _Bool ep13 = 0; [L26] port_t p21 = 0; [L27] char p21_old = '\x0'; [L28] char p21_new = '\x0'; [L29] _Bool ep21 = 0; [L30] port_t p23 = 0; [L31] char p23_old = '\x0'; [L32] char p23_new = '\x0'; [L33] _Bool ep23 = 0; [L34] port_t p31 = 0; [L35] char p31_old = '\x0'; [L36] char p31_new = '\x0'; [L37] _Bool ep31 = 0; [L38] port_t p32 = 0; [L39] char p32_old = '\x0'; [L40] char p32_new = '\x0'; [L41] _Bool ep32 = 0; [L42] char id1 = '\x0'; [L43] unsigned char r1 = '\x0'; [L44] char st1 = '\x0'; [L45] char nl1 = '\x0'; [L46] char m1 = '\x0'; [L47] char max1 = '\x0'; [L48] _Bool mode1 = 0; [L49] _Bool newmax1 = 0; [L50] char id2 = '\x0'; [L51] unsigned char r2 = '\x0'; [L52] char st2 = '\x0'; [L53] char nl2 = '\x0'; [L54] char m2 = '\x0'; [L55] char max2 = '\x0'; [L56] _Bool mode2 = 0; [L57] _Bool newmax2 = 0; [L58] char id3 = '\x0'; [L59] unsigned char r3 = '\x0'; [L60] char st3 = '\x0'; [L61] char nl3 = '\x0'; [L62] char m3 = '\x0'; [L63] char max3 = '\x0'; [L64] _Bool mode3 = 0; [L65] _Bool newmax3 = 0; [L69] void (*nodes[3])() = { &node1, &node2, &node3 }; [L73] int __return_1873; [L74] int __return_2019; [L75] int __return_2152; [L76] int __return_2288; [L77] int __return_2426; [L78] int __return_2551; [L81] int main__c1; [L82] int main__i2; [L83] main__c1 = 0 [L84] ep12 = __VERIFIER_nondet_bool() [L85] ep13 = __VERIFIER_nondet_bool() [L86] ep21 = __VERIFIER_nondet_bool() [L87] ep23 = __VERIFIER_nondet_bool() [L88] ep31 = __VERIFIER_nondet_bool() [L89] ep32 = __VERIFIER_nondet_bool() [L90] id1 = __VERIFIER_nondet_char() [L91] r1 = __VERIFIER_nondet_uchar() [L92] st1 = __VERIFIER_nondet_char() [L93] nl1 = __VERIFIER_nondet_char() [L94] m1 = __VERIFIER_nondet_char() [L95] max1 = __VERIFIER_nondet_char() [L96] mode1 = __VERIFIER_nondet_bool() [L97] newmax1 = __VERIFIER_nondet_bool() [L98] id2 = __VERIFIER_nondet_char() [L99] r2 = __VERIFIER_nondet_uchar() [L100] st2 = __VERIFIER_nondet_char() [L101] nl2 = __VERIFIER_nondet_char() [L102] m2 = __VERIFIER_nondet_char() [L103] max2 = __VERIFIER_nondet_char() [L104] mode2 = __VERIFIER_nondet_bool() [L105] newmax2 = __VERIFIER_nondet_bool() [L106] id3 = __VERIFIER_nondet_char() [L107] r3 = __VERIFIER_nondet_uchar() [L108] st3 = __VERIFIER_nondet_char() [L109] nl3 = __VERIFIER_nondet_char() [L110] m3 = __VERIFIER_nondet_char() [L111] max3 = __VERIFIER_nondet_char() [L112] mode3 = __VERIFIER_nondet_bool() [L113] newmax3 = __VERIFIER_nondet_bool() [L115] _Bool init__r121; [L116] _Bool init__r131; [L117] _Bool init__r211; [L118] _Bool init__r231; [L119] _Bool init__r311; [L120] _Bool init__r321; [L121] _Bool init__r122; [L122] int init__tmp; [L123] _Bool init__r132; [L124] int init__tmp___0; [L125] _Bool init__r212; [L126] int init__tmp___1; [L127] _Bool init__r232; [L128] int init__tmp___2; [L129] _Bool init__r312; [L130] int init__tmp___3; [L131] _Bool init__r322; [L132] int init__tmp___4; [L133] int init__tmp___5; [L134] init__r121 = ep12 [L135] init__r131 = ep13 [L136] init__r211 = ep21 [L137] init__r231 = ep23 [L138] init__r311 = ep31 [L139] init__r321 = ep32 [L140] COND FALSE !(!(init__r121 == 0)) [L2456] COND FALSE !(!(init__r131 == 0)) [L2472] init__tmp = 0 [L144] init__r122 = (_Bool)init__tmp [L145] COND FALSE !(!(init__r131 == 0)) [L2433] COND FALSE !(!(init__r121 == 0)) [L2449] init__tmp___0 = 0 [L149] init__r132 = (_Bool)init__tmp___0 [L150] COND FALSE !(!(init__r211 == 0)) [L2410] COND FALSE !(!(init__r231 == 0)) [L2426] init__tmp___1 = 0 [L154] init__r212 = (_Bool)init__tmp___1 [L155] COND FALSE !(!(init__r231 == 0)) [L2387] COND FALSE !(!(init__r211 == 0)) [L2403] init__tmp___2 = 0 [L159] init__r232 = (_Bool)init__tmp___2 [L160] COND FALSE !(!(init__r311 == 0)) [L2364] COND FALSE !(!(init__r321 == 0)) [L2380] init__tmp___3 = 0 [L164] init__r312 = (_Bool)init__tmp___3 [L165] COND FALSE !(!(init__r321 == 0)) [L2341] COND FALSE !(!(init__r311 == 0)) [L2357] init__tmp___4 = 0 [L169] init__r322 = (_Bool)init__tmp___4 [L170] COND TRUE ((int)id1) != ((int)id2) [L172] COND TRUE ((int)id1) != ((int)id3) [L174] COND TRUE ((int)id2) != ((int)id3) [L176] COND TRUE ((int)id1) >= 0 [L178] COND TRUE ((int)id2) >= 0 [L180] COND TRUE ((int)id3) >= 0 [L182] COND TRUE ((int)r1) == 0 [L184] COND TRUE ((int)r2) == 0 [L186] COND TRUE ((int)r3) == 0 [L188] COND TRUE ((int)max1) == ((int)id1) [L190] COND TRUE ((int)max2) == ((int)id2) [L192] COND TRUE ((int)max3) == ((int)id3) [L194] COND TRUE ((int)st1) == 0 [L196] COND TRUE ((int)st2) == 0 [L198] COND TRUE ((int)st3) == 0 [L200] COND TRUE ((int)nl1) == 0 [L202] COND TRUE ((int)nl2) == 0 [L204] COND TRUE ((int)nl3) == 0 [L206] COND TRUE ((int)mode1) == 0 [L208] COND TRUE ((int)mode2) == 0 [L210] COND TRUE ((int)mode3) == 0 [L212] COND TRUE !(newmax1 == 0) [L214] COND TRUE !(newmax2 == 0) [L216] COND TRUE !(newmax3 == 0) [L218] init__tmp___5 = 1 [L219] __return_1873 = init__tmp___5 [L220] main__i2 = __return_1873 [L221] COND TRUE main__i2 != 0 [L223] p12_old = nomsg [L224] p12_new = nomsg [L225] p13_old = nomsg [L226] p13_new = nomsg [L227] p21_old = nomsg [L228] p21_new = nomsg [L229] p23_old = nomsg [L230] p23_new = nomsg [L231] p31_old = nomsg [L232] p31_new = nomsg [L233] p32_old = nomsg [L234] p32_new = nomsg [L235] main__i2 = 0 [L237] _Bool node1__newmax; [L238] node1__newmax = 0 [L239] COND FALSE !(!(mode1 == 0)) [L245] COND TRUE ((int)r1) < 2 [L247] COND FALSE !(!(ep12 == 0)) [L260] COND FALSE !(!(ep13 == 0)) [L273] mode1 = 1 [L275] _Bool node2__newmax; [L276] node2__newmax = 0 [L277] COND FALSE !(!(mode2 == 0)) [L283] COND TRUE ((int)r2) < 2 [L285] COND FALSE !(!(ep21 == 0)) [L298] COND FALSE !(!(ep23 == 0)) [L311] mode2 = 1 [L313] _Bool node3__newmax; [L314] node3__newmax = 0 [L315] COND FALSE !(!(mode3 == 0)) [L321] COND TRUE ((int)r3) < 2 [L323] COND FALSE !(!(ep31 == 0)) [L336] COND FALSE !(!(ep32 == 0)) [L349] mode3 = 1 [L350] p12_old = p12_new [L351] p12_new = nomsg [L352] p13_old = p13_new [L353] p13_new = nomsg [L354] p21_old = p21_new [L355] p21_new = nomsg [L356] p23_old = p23_new [L357] p23_new = nomsg [L358] p31_old = p31_new [L359] p31_new = nomsg [L360] p32_old = p32_new [L361] p32_new = nomsg [L363] int check__tmp; [L364] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L366] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L368] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L370] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L372] COND FALSE !(((int)r1) >= 2) [L378] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L380] COND TRUE ((int)r1) < 2 [L382] COND FALSE !(((int)r1) >= 2) [L388] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L390] COND TRUE ((int)r1) < 2 [L392] check__tmp = 1 [L393] __return_2019 = check__tmp [L394] main__c1 = __return_2019 [L396] _Bool __tmp_1; [L397] __tmp_1 = main__c1 [L398] _Bool assert__arg; [L399] assert__arg = __tmp_1 [L400] COND FALSE !(assert__arg == 0) [L407] _Bool node1__newmax; [L408] node1__newmax = 0 [L409] COND TRUE !(mode1 == 0) [L411] COND FALSE !(r1 == 255) [L417] r1 = r1 + 1 [L418] COND FALSE !(!(ep21 == 0)) [L427] COND FALSE !(!(ep31 == 0)) [L436] newmax1 = node1__newmax [L437] COND FALSE !(((int)r1) == 2) [L443] mode1 = 0 [L445] _Bool node2__newmax; [L446] node2__newmax = 0 [L447] COND TRUE !(mode2 == 0) [L449] COND FALSE !(r2 == 255) [L455] r2 = r2 + 1 [L456] COND FALSE !(!(ep12 == 0)) [L465] COND FALSE !(!(ep32 == 0)) [L474] newmax2 = node2__newmax [L475] COND FALSE !(((int)r2) == 2) [L481] mode2 = 0 [L483] _Bool node3__newmax; [L484] node3__newmax = 0 [L485] COND TRUE !(mode3 == 0) [L487] COND FALSE !(r3 == 255) [L493] r3 = r3 + 1 [L494] COND FALSE !(!(ep13 == 0)) [L503] COND FALSE !(!(ep23 == 0)) [L512] newmax3 = node3__newmax [L513] COND FALSE !(((int)r3) == 2) [L519] mode3 = 0 [L520] p12_old = p12_new [L521] p12_new = nomsg [L522] p13_old = p13_new [L523] p13_new = nomsg [L524] p21_old = p21_new [L525] p21_new = nomsg [L526] p23_old = p23_new [L527] p23_new = nomsg [L528] p31_old = p31_new [L529] p31_new = nomsg [L530] p32_old = p32_new [L531] p32_new = nomsg [L533] int check__tmp; [L534] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L536] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L538] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L540] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L542] COND FALSE !(((int)r1) >= 2) [L548] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L550] COND TRUE ((int)r1) < 2 [L552] COND FALSE !(((int)r1) >= 2) [L558] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L560] COND TRUE ((int)r1) < 2 [L562] check__tmp = 1 [L563] __return_2152 = check__tmp [L564] main__c1 = __return_2152 [L566] _Bool __tmp_2; [L567] __tmp_2 = main__c1 [L568] _Bool assert__arg; [L569] assert__arg = __tmp_2 [L570] COND FALSE !(assert__arg == 0) [L577] _Bool node1__newmax; [L578] node1__newmax = 0 [L579] COND FALSE !(!(mode1 == 0)) [L585] COND TRUE ((int)r1) < 2 [L587] COND FALSE !(!(ep12 == 0)) [L600] COND FALSE !(!(ep13 == 0)) [L613] mode1 = 1 [L615] _Bool node2__newmax; [L616] node2__newmax = 0 [L617] COND FALSE !(!(mode2 == 0)) [L623] COND TRUE ((int)r2) < 2 [L625] COND FALSE !(!(ep21 == 0)) [L638] COND FALSE !(!(ep23 == 0)) [L651] mode2 = 1 [L653] _Bool node3__newmax; [L654] node3__newmax = 0 [L655] COND FALSE !(!(mode3 == 0)) [L661] COND TRUE ((int)r3) < 2 [L663] COND FALSE !(!(ep31 == 0)) [L676] COND FALSE !(!(ep32 == 0)) [L689] mode3 = 1 [L690] p12_old = p12_new [L691] p12_new = nomsg [L692] p13_old = p13_new [L693] p13_new = nomsg [L694] p21_old = p21_new [L695] p21_new = nomsg [L696] p23_old = p23_new [L697] p23_new = nomsg [L698] p31_old = p31_new [L699] p31_new = nomsg [L700] p32_old = p32_new [L701] p32_new = nomsg [L703] int check__tmp; [L704] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L706] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L708] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L710] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L712] COND FALSE !(((int)r1) >= 2) [L718] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L720] COND TRUE ((int)r1) < 2 [L722] COND FALSE !(((int)r1) >= 2) [L728] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L730] COND TRUE ((int)r1) < 2 [L732] check__tmp = 1 [L733] __return_2288 = check__tmp [L734] main__c1 = __return_2288 [L736] _Bool __tmp_3; [L737] __tmp_3 = main__c1 [L738] _Bool assert__arg; [L739] assert__arg = __tmp_3 [L740] COND FALSE !(assert__arg == 0) [L747] _Bool node1__newmax; [L748] node1__newmax = 0 [L749] COND TRUE !(mode1 == 0) [L751] COND FALSE !(r1 == 255) [L757] r1 = r1 + 1 [L758] COND FALSE !(!(ep21 == 0)) [L767] COND FALSE !(!(ep31 == 0)) [L776] newmax1 = node1__newmax [L777] COND TRUE ((int)r1) == 2 [L779] COND TRUE ((int)max1) == ((int)id1) [L781] st1 = 1 [L783] mode1 = 0 [L785] _Bool node2__newmax; [L786] node2__newmax = 0 [L787] COND TRUE !(mode2 == 0) [L789] COND FALSE !(r2 == 255) [L795] r2 = r2 + 1 [L796] COND FALSE !(!(ep12 == 0)) [L805] COND FALSE !(!(ep32 == 0)) [L814] newmax2 = node2__newmax [L815] COND TRUE ((int)r2) == 2 [L817] COND TRUE ((int)max2) == ((int)id2) [L819] st2 = 1 [L821] mode2 = 0 [L823] _Bool node3__newmax; [L824] node3__newmax = 0 [L825] COND TRUE !(mode3 == 0) [L827] COND FALSE !(r3 == 255) [L833] r3 = r3 + 1 [L834] COND FALSE !(!(ep13 == 0)) [L843] COND FALSE !(!(ep23 == 0)) [L852] newmax3 = node3__newmax [L853] COND TRUE ((int)r3) == 2 [L855] COND TRUE ((int)max3) == ((int)id3) [L857] st3 = 1 [L859] mode3 = 0 [L860] p12_old = p12_new [L861] p12_new = nomsg [L862] p13_old = p13_new [L863] p13_new = nomsg [L864] p21_old = p21_new [L865] p21_new = nomsg [L866] p23_old = p23_new [L867] p23_new = nomsg [L868] p31_old = p31_new [L869] p31_new = nomsg [L870] p32_old = p32_new [L871] p32_new = nomsg [L873] int check__tmp; [L874] COND FALSE !(((((int)st1) + ((int)st2)) + ((int)st3)) <= 1) [L1570] check__tmp = 0 [L902] __return_2426 = check__tmp [L903] main__c1 = __return_2426 [L906] _Bool __tmp_4; [L907] __tmp_4 = main__c1 [L908] _Bool assert__arg; [L909] assert__arg = __tmp_4 [L910] COND TRUE assert__arg == 0 [L912] CALL reach_error() [L4] __assert_fail("0", "pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 919 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 45.1s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 34.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9155 SDtfs, 7966 SDslu, 6930 SDs, 0 SdLazy, 9440 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7618occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 13104 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...