/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_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:10:12,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:10:12,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:10:12,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 22:10:12,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 22:10:12,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 22:10:12,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 22:10:12,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 22:10:12,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 22:10:12,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 22:10:12,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 22:10:12,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 22:10:12,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:10:12,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:10:12,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:10:12,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:10:12,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:10:12,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:10:12,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:10:12,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:10:12,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:10:12,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:10:12,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:10:12,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:10:12,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:10:12,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:10:12,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:10:12,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:10:12,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 22:10:12,345 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:10:12,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:10:12,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:10:12,352 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:10:12,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:10:12,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:10:12,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:10:12,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:10:12,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:10:12,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:10:12,355 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:10:12,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:10:12,356 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:10:12,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:10:12,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:10:12,357 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:10:12,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:10:12,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:10:12,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:10:12,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:10:12,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:10:12,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:10:12,359 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:10:12,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:10:12,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:10:12,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:10:12,962 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:10:12,964 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:10:12,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 22:10:13,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/571eeef3b/8b319476bebe4a088e5a0a0210777949/FLAGa9c1b8675 [2020-10-23 22:10:14,067 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:10:14,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 22:10:14,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/571eeef3b/8b319476bebe4a088e5a0a0210777949/FLAGa9c1b8675 [2020-10-23 22:10:14,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/571eeef3b/8b319476bebe4a088e5a0a0210777949 [2020-10-23 22:10:14,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:10:14,220 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:10:14,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:10:14,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:10:14,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:10:14,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:10:14" (1/1) ... [2020-10-23 22:10:14,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34452dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:14, skipping insertion in model container [2020-10-23 22:10:14,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:10:14" (1/1) ... [2020-10-23 22:10:14,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:10:14,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:10:15,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:10:15,315 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:10:15,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:10:15,698 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:10:15,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:15 WrapperNode [2020-10-23 22:10:15,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:10:15,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:10:15,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:10:15,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:10:15,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:15" (1/1) ... [2020-10-23 22:10:15,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:15" (1/1) ... [2020-10-23 22:10:15,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:15" (1/1) ... [2020-10-23 22:10:15,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:15" (1/1) ... [2020-10-23 22:10:15,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:15" (1/1) ... [2020-10-23 22:10:15,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:15" (1/1) ... [2020-10-23 22:10:15,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:15" (1/1) ... [2020-10-23 22:10:15,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:10:15,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:10:15,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:10:15,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:10:15,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:10:16,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:10:16,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:10:16,038 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:10:16,038 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 22:10:16,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:10:16,038 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:10:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:10:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:10:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:10:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 22:10:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-23 22:10:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 22:10:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 22:10:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 22:10:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 22:10:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 22:10:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 22:10:16,041 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 22:10:16,041 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 22:10:16,041 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 22:10:16,041 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 22:10:16,041 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:10:16,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:10:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:10:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:10:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:10:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:10:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:10:19,019 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:10:19,020 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 22:10:19,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:10:19 BoogieIcfgContainer [2020-10-23 22:10:19,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:10:19,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:10:19,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:10:19,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:10:19,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:10:14" (1/3) ... [2020-10-23 22:10:19,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36acc044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:10:19, skipping insertion in model container [2020-10-23 22:10:19,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:15" (2/3) ... [2020-10-23 22:10:19,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36acc044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:10:19, skipping insertion in model container [2020-10-23 22:10:19,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:10:19" (3/3) ... [2020-10-23 22:10:19,037 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 22:10:19,053 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:10:19,060 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:10:19,096 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:10:19,130 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:10:19,130 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:10:19,131 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:10:19,131 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:10:19,131 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:10:19,131 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:10:19,131 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:10:19,131 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:10:19,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states. [2020-10-23 22:10:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-10-23 22:10:19,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:10:19,265 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] [2020-10-23 22:10:19,267 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:10:19,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:10:19,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1022135598, now seen corresponding path program 1 times [2020-10-23 22:10:19,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:10:19,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307806059] [2020-10-23 22:10:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:10:19,419 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:10:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:20,880 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-23 22:10:20,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:10:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:10:21,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307806059] [2020-10-23 22:10:21,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:10:21,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:10:21,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418173960] [2020-10-23 22:10:21,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:10:21,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:10:21,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:10:21,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:10:21,459 INFO L87 Difference]: Start difference. First operand 1130 states. Second operand 4 states. [2020-10-23 22:10:27,772 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-23 22:10:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:10:28,988 INFO L93 Difference]: Finished difference Result 1836 states and 2386 transitions. [2020-10-23 22:10:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:10:28,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 423 [2020-10-23 22:10:28,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:10:29,030 INFO L225 Difference]: With dead ends: 1836 [2020-10-23 22:10:29,031 INFO L226 Difference]: Without dead ends: 1299 [2020-10-23 22:10:29,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:10:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2020-10-23 22:10:29,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1291. [2020-10-23 22:10:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1291 states. [2020-10-23 22:10:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1550 transitions. [2020-10-23 22:10:29,267 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1550 transitions. Word has length 423 [2020-10-23 22:10:29,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:10:29,279 INFO L481 AbstractCegarLoop]: Abstraction has 1291 states and 1550 transitions. [2020-10-23 22:10:29,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:10:29,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1550 transitions. [2020-10-23 22:10:29,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-10-23 22:10:29,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:10:29,302 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] [2020-10-23 22:10:29,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:10:29,304 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:10:29,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:10:29,305 INFO L82 PathProgramCache]: Analyzing trace with hash 471443400, now seen corresponding path program 1 times [2020-10-23 22:10:29,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:10:29,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849671632] [2020-10-23 22:10:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:10:29,325 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:10:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:30,380 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-23 22:10:30,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:10:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:10:30,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849671632] [2020-10-23 22:10:30,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:10:30,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:10:30,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576220819] [2020-10-23 22:10:30,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:10:30,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:10:30,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:10:30,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:10:30,817 INFO L87 Difference]: Start difference. First operand 1291 states and 1550 transitions. Second operand 5 states. [2020-10-23 22:10:38,761 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-23 22:10:41,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:10:41,021 INFO L93 Difference]: Finished difference Result 3448 states and 4199 transitions. [2020-10-23 22:10:41,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:10:41,022 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 423 [2020-10-23 22:10:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:10:41,038 INFO L225 Difference]: With dead ends: 3448 [2020-10-23 22:10:41,038 INFO L226 Difference]: Without dead ends: 2343 [2020-10-23 22:10:41,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:10:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2020-10-23 22:10:41,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2223. [2020-10-23 22:10:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-10-23 22:10:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 2704 transitions. [2020-10-23 22:10:41,273 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 2704 transitions. Word has length 423 [2020-10-23 22:10:41,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:10:41,274 INFO L481 AbstractCegarLoop]: Abstraction has 2223 states and 2704 transitions. [2020-10-23 22:10:41,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:10:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 2704 transitions. [2020-10-23 22:10:41,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-10-23 22:10:41,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:10:41,289 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] [2020-10-23 22:10:41,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:10:41,290 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:10:41,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:10:41,291 INFO L82 PathProgramCache]: Analyzing trace with hash 2061758, now seen corresponding path program 1 times [2020-10-23 22:10:41,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:10:41,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380300638] [2020-10-23 22:10:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:10:41,298 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:10:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:41,890 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-23 22:10:41,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:10:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:10:42,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380300638] [2020-10-23 22:10:42,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:10:42,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:10:42,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634340181] [2020-10-23 22:10:42,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:10:42,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:10:42,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:10:42,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:10:42,202 INFO L87 Difference]: Start difference. First operand 2223 states and 2704 transitions. Second operand 4 states. [2020-10-23 22:10:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:10:48,712 INFO L93 Difference]: Finished difference Result 6258 states and 7678 transitions. [2020-10-23 22:10:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 22:10:48,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 424 [2020-10-23 22:10:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:10:48,739 INFO L225 Difference]: With dead ends: 6258 [2020-10-23 22:10:48,740 INFO L226 Difference]: Without dead ends: 4255 [2020-10-23 22:10:48,747 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 [2020-10-23 22:10:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2020-10-23 22:10:48,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 2225. [2020-10-23 22:10:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2225 states. [2020-10-23 22:10:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2706 transitions. [2020-10-23 22:10:48,986 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2706 transitions. Word has length 424 [2020-10-23 22:10:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:10:48,987 INFO L481 AbstractCegarLoop]: Abstraction has 2225 states and 2706 transitions. [2020-10-23 22:10:48,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:10:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2706 transitions. [2020-10-23 22:10:48,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-10-23 22:10:48,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:10:48,997 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] [2020-10-23 22:10:48,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:10:48,997 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:10:48,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:10:48,998 INFO L82 PathProgramCache]: Analyzing trace with hash -614553558, now seen corresponding path program 1 times [2020-10-23 22:10:48,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:10:48,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116416679] [2020-10-23 22:10:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:10:49,004 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:10:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:49,826 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-23 22:10:49,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:10:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:10:50,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116416679] [2020-10-23 22:10:50,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:10:50,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:10:50,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457876462] [2020-10-23 22:10:50,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:10:50,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:10:50,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:10:50,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:10:50,065 INFO L87 Difference]: Start difference. First operand 2225 states and 2706 transitions. Second operand 5 states. [2020-10-23 22:10:57,397 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-23 22:10:59,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:10:59,518 INFO L93 Difference]: Finished difference Result 6127 states and 7502 transitions. [2020-10-23 22:10:59,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:10:59,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 425 [2020-10-23 22:10:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:10:59,555 INFO L225 Difference]: With dead ends: 6127 [2020-10-23 22:10:59,556 INFO L226 Difference]: Without dead ends: 4125 [2020-10-23 22:10:59,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:10:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2020-10-23 22:11:00,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 4005. [2020-10-23 22:11:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4005 states. [2020-10-23 22:11:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4005 states to 4005 states and 4890 transitions. [2020-10-23 22:11:00,048 INFO L78 Accepts]: Start accepts. Automaton has 4005 states and 4890 transitions. Word has length 425 [2020-10-23 22:11:00,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:11:00,050 INFO L481 AbstractCegarLoop]: Abstraction has 4005 states and 4890 transitions. [2020-10-23 22:11:00,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:11:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 4005 states and 4890 transitions. [2020-10-23 22:11:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-10-23 22:11:00,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:11:00,065 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] [2020-10-23 22:11:00,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 22:11:00,065 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:11:00,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:11:00,066 INFO L82 PathProgramCache]: Analyzing trace with hash 622749384, now seen corresponding path program 1 times [2020-10-23 22:11:00,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:11:00,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583181128] [2020-10-23 22:11:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:11:00,075 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:11:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:00,721 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-23 22:11:00,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:11:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:11:00,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583181128] [2020-10-23 22:11:00,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:11:00,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:11:00,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464782428] [2020-10-23 22:11:00,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:11:00,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:11:00,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:11:00,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:11:00,953 INFO L87 Difference]: Start difference. First operand 4005 states and 4890 transitions. Second operand 4 states. [2020-10-23 22:11:07,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:11:07,053 INFO L93 Difference]: Finished difference Result 11541 states and 14153 transitions. [2020-10-23 22:11:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 22:11:07,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 426 [2020-10-23 22:11:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:11:07,107 INFO L225 Difference]: With dead ends: 11541 [2020-10-23 22:11:07,108 INFO L226 Difference]: Without dead ends: 7779 [2020-10-23 22:11:07,124 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 [2020-10-23 22:11:07,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7779 states. [2020-10-23 22:11:07,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7779 to 4009. [2020-10-23 22:11:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4009 states. [2020-10-23 22:11:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 4894 transitions. [2020-10-23 22:11:07,736 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 4894 transitions. Word has length 426 [2020-10-23 22:11:07,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:11:07,737 INFO L481 AbstractCegarLoop]: Abstraction has 4009 states and 4894 transitions. [2020-10-23 22:11:07,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:11:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 4894 transitions. [2020-10-23 22:11:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2020-10-23 22:11:07,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:11:07,751 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] [2020-10-23 22:11:07,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 22:11:07,752 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:11:07,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:11:07,753 INFO L82 PathProgramCache]: Analyzing trace with hash 132057652, now seen corresponding path program 1 times [2020-10-23 22:11:07,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:11:07,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048823475] [2020-10-23 22:11:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:11:07,765 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:11:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:08,653 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-23 22:11:08,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:11:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:11:08,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048823475] [2020-10-23 22:11:08,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:11:08,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:11:08,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425605380] [2020-10-23 22:11:08,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:11:08,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:11:08,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:11:08,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:11:08,938 INFO L87 Difference]: Start difference. First operand 4009 states and 4894 transitions. Second operand 5 states. [2020-10-23 22:11:16,003 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-23 22:11:18,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:11:18,112 INFO L93 Difference]: Finished difference Result 10539 states and 12896 transitions. [2020-10-23 22:11:18,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:11:18,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 427 [2020-10-23 22:11:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:11:18,146 INFO L225 Difference]: With dead ends: 10539 [2020-10-23 22:11:18,146 INFO L226 Difference]: Without dead ends: 6779 [2020-10-23 22:11:18,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:11:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2020-10-23 22:11:18,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6659. [2020-10-23 22:11:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6659 states. [2020-10-23 22:11:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6659 states to 6659 states and 8102 transitions. [2020-10-23 22:11:18,938 INFO L78 Accepts]: Start accepts. Automaton has 6659 states and 8102 transitions. Word has length 427 [2020-10-23 22:11:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:11:18,939 INFO L481 AbstractCegarLoop]: Abstraction has 6659 states and 8102 transitions. [2020-10-23 22:11:18,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:11:18,939 INFO L276 IsEmpty]: Start isEmpty. Operand 6659 states and 8102 transitions. [2020-10-23 22:11:18,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-10-23 22:11:18,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:11:18,960 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] [2020-10-23 22:11:18,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 22:11:18,961 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:11:18,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:11:18,961 INFO L82 PathProgramCache]: Analyzing trace with hash -632255190, now seen corresponding path program 1 times [2020-10-23 22:11:18,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:11:18,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284996952] [2020-10-23 22:11:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:11:18,967 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:11:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:19,680 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-23 22:11:19,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:11:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:11:19,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284996952] [2020-10-23 22:11:19,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:11:19,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:11:19,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376056194] [2020-10-23 22:11:19,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:11:19,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:11:19,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:11:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:11:19,926 INFO L87 Difference]: Start difference. First operand 6659 states and 8102 transitions. Second operand 4 states. [2020-10-23 22:11:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:11:27,056 INFO L93 Difference]: Finished difference Result 19041 states and 23237 transitions. [2020-10-23 22:11:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 22:11:27,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 428 [2020-10-23 22:11:27,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:11:27,104 INFO L225 Difference]: With dead ends: 19041 [2020-10-23 22:11:27,105 INFO L226 Difference]: Without dead ends: 12991 [2020-10-23 22:11:27,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:11:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12991 states. [2020-10-23 22:11:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12991 to 6667. [2020-10-23 22:11:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6667 states. [2020-10-23 22:11:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6667 states to 6667 states and 8110 transitions. [2020-10-23 22:11:27,997 INFO L78 Accepts]: Start accepts. Automaton has 6667 states and 8110 transitions. Word has length 428 [2020-10-23 22:11:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:11:27,998 INFO L481 AbstractCegarLoop]: Abstraction has 6667 states and 8110 transitions. [2020-10-23 22:11:27,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:11:27,998 INFO L276 IsEmpty]: Start isEmpty. Operand 6667 states and 8110 transitions. [2020-10-23 22:11:28,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-10-23 22:11:28,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:11:28,014 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] [2020-10-23 22:11:28,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 22:11:28,015 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:11:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:11:28,016 INFO L82 PathProgramCache]: Analyzing trace with hash 969891814, now seen corresponding path program 1 times [2020-10-23 22:11:28,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:11:28,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039735355] [2020-10-23 22:11:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:11:28,021 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:11:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 22:11:28,102 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 22:11:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 22:11:28,199 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 22:11:28,753 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 22:11:28,753 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 22:11:28,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 22:11:28,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:11:28 BoogieIcfgContainer [2020-10-23 22:11:28,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 22:11:28,824 INFO L168 Benchmark]: Toolchain (without parser) took 74609.46 ms. Allocated memory was 155.2 MB in the beginning and 828.4 MB in the end (delta: 673.2 MB). Free memory was 130.0 MB in the beginning and 477.1 MB in the end (delta: -347.1 MB). Peak memory consumption was 326.6 MB. Max. memory is 8.0 GB. [2020-10-23 22:11:28,825 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 155.2 MB. Free memory was 127.6 MB in the beginning and 127.4 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:11:28,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1471.93 ms. Allocated memory is still 155.2 MB. Free memory was 129.6 MB in the beginning and 134.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 36.5 MB. Max. memory is 8.0 GB. [2020-10-23 22:11:28,827 INFO L168 Benchmark]: Boogie Preprocessor took 201.93 ms. Allocated memory is still 155.2 MB. Free memory was 134.9 MB in the beginning and 130.2 MB in the end (delta: 4.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-10-23 22:11:28,828 INFO L168 Benchmark]: RCFGBuilder took 3119.67 ms. Allocated memory was 155.2 MB in the beginning and 190.8 MB in the end (delta: 35.7 MB). Free memory was 130.2 MB in the beginning and 85.8 MB in the end (delta: 44.4 MB). Peak memory consumption was 80.7 MB. Max. memory is 8.0 GB. [2020-10-23 22:11:28,829 INFO L168 Benchmark]: TraceAbstraction took 69793.47 ms. Allocated memory was 190.8 MB in the beginning and 828.4 MB in the end (delta: 637.5 MB). Free memory was 85.3 MB in the beginning and 477.1 MB in the end (delta: -391.8 MB). Peak memory consumption was 245.2 MB. Max. memory is 8.0 GB. [2020-10-23 22:11:28,833 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 155.2 MB. Free memory was 127.6 MB in the beginning and 127.4 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 1471.93 ms. Allocated memory is still 155.2 MB. Free memory was 129.6 MB in the beginning and 134.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 36.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 201.93 ms. Allocated memory is still 155.2 MB. Free memory was 134.9 MB in the beginning and 130.2 MB in the end (delta: 4.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 3119.67 ms. Allocated memory was 155.2 MB in the beginning and 190.8 MB in the end (delta: 35.7 MB). Free memory was 130.2 MB in the beginning and 85.8 MB in the end (delta: 44.4 MB). Peak memory consumption was 80.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 69793.47 ms. Allocated memory was 190.8 MB in the beginning and 828.4 MB in the end (delta: 637.5 MB). Free memory was 85.3 MB in the beginning and 477.1 MB in the end (delta: -391.8 MB). Peak memory consumption was 245.2 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] char id2 = '\x0'; [L50] unsigned char r2 = '\x0'; [L51] char st2 = '\x0'; [L52] char nl2 = '\x0'; [L53] char m2 = '\x0'; [L54] char max2 = '\x0'; [L55] _Bool mode2 = 0; [L56] char id3 = '\x0'; [L57] unsigned char r3 = '\x0'; [L58] char st3 = '\x0'; [L59] char nl3 = '\x0'; [L60] char m3 = '\x0'; [L61] char max3 = '\x0'; [L62] _Bool mode3 = 0; [L66] void (*nodes[3])() = { &node1, &node2, &node3 }; [L70] int __return_1718; [L71] int __return_1846; [L72] int __return_1964; [L73] int __return_2082; [L74] int __return_2816; [L75] int __return_2785; [L76] int __return_2726; [L77] int __return_2692; [L78] int __return_2315; [L79] int __return_2587; [L80] int __return_2553; [L81] int __return_2473; [L82] int __return_2205; [L85] int main__c1; [L86] int main__i2; [L87] main__c1 = 0 [L88] ep12 = __VERIFIER_nondet_bool() [L89] ep13 = __VERIFIER_nondet_bool() [L90] ep21 = __VERIFIER_nondet_bool() [L91] ep23 = __VERIFIER_nondet_bool() [L92] ep31 = __VERIFIER_nondet_bool() [L93] ep32 = __VERIFIER_nondet_bool() [L94] id1 = __VERIFIER_nondet_char() [L95] r1 = __VERIFIER_nondet_uchar() [L96] st1 = __VERIFIER_nondet_char() [L97] nl1 = __VERIFIER_nondet_char() [L98] m1 = __VERIFIER_nondet_char() [L99] max1 = __VERIFIER_nondet_char() [L100] mode1 = __VERIFIER_nondet_bool() [L101] id2 = __VERIFIER_nondet_char() [L102] r2 = __VERIFIER_nondet_uchar() [L103] st2 = __VERIFIER_nondet_char() [L104] nl2 = __VERIFIER_nondet_char() [L105] m2 = __VERIFIER_nondet_char() [L106] max2 = __VERIFIER_nondet_char() [L107] mode2 = __VERIFIER_nondet_bool() [L108] id3 = __VERIFIER_nondet_char() [L109] r3 = __VERIFIER_nondet_uchar() [L110] st3 = __VERIFIER_nondet_char() [L111] nl3 = __VERIFIER_nondet_char() [L112] m3 = __VERIFIER_nondet_char() [L113] max3 = __VERIFIER_nondet_char() [L114] mode3 = __VERIFIER_nondet_bool() [L116] _Bool init__r121; [L117] _Bool init__r131; [L118] _Bool init__r211; [L119] _Bool init__r231; [L120] _Bool init__r311; [L121] _Bool init__r321; [L122] _Bool init__r122; [L123] int init__tmp; [L124] _Bool init__r132; [L125] int init__tmp___0; [L126] _Bool init__r212; [L127] int init__tmp___1; [L128] _Bool init__r232; [L129] int init__tmp___2; [L130] _Bool init__r312; [L131] int init__tmp___3; [L132] _Bool init__r322; [L133] int init__tmp___4; [L134] int init__tmp___5; [L135] init__r121 = ep12 [L136] init__r131 = ep13 [L137] init__r211 = ep21 [L138] init__r231 = ep23 [L139] init__r311 = ep31 [L140] init__r321 = ep32 [L141] COND FALSE !(!(init__r121 == 0)) [L2958] COND FALSE !(!(init__r131 == 0)) [L2974] init__tmp = 0 [L145] init__r122 = (_Bool)init__tmp [L146] COND FALSE !(!(init__r131 == 0)) [L2935] COND FALSE !(!(init__r121 == 0)) [L2951] init__tmp___0 = 0 [L150] init__r132 = (_Bool)init__tmp___0 [L151] COND FALSE !(!(init__r211 == 0)) [L2912] COND FALSE !(!(init__r231 == 0)) [L2928] init__tmp___1 = 0 [L155] init__r212 = (_Bool)init__tmp___1 [L156] COND FALSE !(!(init__r231 == 0)) [L2889] COND FALSE !(!(init__r211 == 0)) [L2905] init__tmp___2 = 0 [L160] init__r232 = (_Bool)init__tmp___2 [L161] COND FALSE !(!(init__r311 == 0)) [L2866] COND FALSE !(!(init__r321 == 0)) [L2882] init__tmp___3 = 0 [L165] init__r312 = (_Bool)init__tmp___3 [L166] COND FALSE !(!(init__r321 == 0)) [L2843] COND FALSE !(!(init__r311 == 0)) [L2859] init__tmp___4 = 0 [L170] init__r322 = (_Bool)init__tmp___4 [L171] COND TRUE ((int)id1) != ((int)id2) [L173] COND TRUE ((int)id1) != ((int)id3) [L175] COND TRUE ((int)id2) != ((int)id3) [L177] COND TRUE ((int)id1) >= 0 [L179] COND TRUE ((int)id2) >= 0 [L181] COND TRUE ((int)id3) >= 0 [L183] COND TRUE ((int)r1) == 0 [L185] COND TRUE ((int)r2) == 0 [L187] COND TRUE ((int)r3) == 0 [L189] COND TRUE ((int)max1) == ((int)id1) [L191] COND TRUE ((int)max2) == ((int)id2) [L193] COND TRUE ((int)max3) == ((int)id3) [L195] COND TRUE ((int)st1) == 0 [L197] COND TRUE ((int)st2) == 0 [L199] COND TRUE ((int)st3) == 0 [L201] COND TRUE ((int)nl1) == 0 [L203] COND TRUE ((int)nl2) == 0 [L205] COND TRUE ((int)nl3) == 0 [L207] COND TRUE ((int)mode1) == 0 [L209] COND TRUE ((int)mode2) == 0 [L211] COND TRUE ((int)mode3) == 0 [L213] init__tmp___5 = 1 [L214] __return_1718 = init__tmp___5 [L215] main__i2 = __return_1718 [L216] COND TRUE main__i2 != 0 [L218] p12_old = nomsg [L219] p12_new = nomsg [L220] p13_old = nomsg [L221] p13_new = nomsg [L222] p21_old = nomsg [L223] p21_new = nomsg [L224] p23_old = nomsg [L225] p23_new = nomsg [L226] p31_old = nomsg [L227] p31_new = nomsg [L228] p32_old = nomsg [L229] p32_new = nomsg [L230] main__i2 = 0 [L232] COND FALSE !(!(mode1 == 0)) [L238] COND TRUE ((int)r1) < 2 [L240] COND FALSE !(!(ep12 == 0)) [L251] COND FALSE !(!(ep13 == 0)) [L262] mode1 = 1 [L264] COND FALSE !(!(mode2 == 0)) [L270] COND TRUE ((int)r2) < 2 [L272] COND FALSE !(!(ep21 == 0)) [L283] COND FALSE !(!(ep23 == 0)) [L294] mode2 = 1 [L296] COND FALSE !(!(mode3 == 0)) [L302] COND TRUE ((int)r3) < 2 [L304] COND FALSE !(!(ep31 == 0)) [L315] COND FALSE !(!(ep32 == 0)) [L326] mode3 = 1 [L327] p12_old = p12_new [L328] p12_new = nomsg [L329] p13_old = p13_new [L330] p13_new = nomsg [L331] p21_old = p21_new [L332] p21_new = nomsg [L333] p23_old = p23_new [L334] p23_new = nomsg [L335] p31_old = p31_new [L336] p31_new = nomsg [L337] p32_old = p32_new [L338] p32_new = nomsg [L340] int check__tmp; [L341] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L343] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L345] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L347] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L349] COND FALSE !(((int)r1) >= 2) [L355] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L357] COND TRUE ((int)r1) < 2 [L359] COND FALSE !(((int)r1) >= 2) [L365] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L367] COND TRUE ((int)r1) < 2 [L369] check__tmp = 1 [L370] __return_1846 = check__tmp [L371] main__c1 = __return_1846 [L373] _Bool __tmp_1; [L374] __tmp_1 = main__c1 [L375] _Bool assert__arg; [L376] assert__arg = __tmp_1 [L377] COND FALSE !(assert__arg == 0) [L384] COND TRUE !(mode1 == 0) [L386] COND FALSE !(r1 == 255) [L392] r1 = r1 + 1 [L393] COND FALSE !(!(ep21 == 0)) [L401] COND FALSE !(!(ep31 == 0)) [L409] COND FALSE !(((int)r1) == 2) [L415] mode1 = 0 [L417] COND TRUE !(mode2 == 0) [L419] COND FALSE !(r2 == 255) [L425] r2 = r2 + 1 [L426] COND FALSE !(!(ep12 == 0)) [L434] COND FALSE !(!(ep32 == 0)) [L442] COND FALSE !(((int)r2) == 2) [L448] mode2 = 0 [L450] COND TRUE !(mode3 == 0) [L452] COND FALSE !(r3 == 255) [L458] r3 = r3 + 1 [L459] COND FALSE !(!(ep13 == 0)) [L467] COND FALSE !(!(ep23 == 0)) [L475] COND FALSE !(((int)r3) == 2) [L481] mode3 = 0 [L482] p12_old = p12_new [L483] p12_new = nomsg [L484] p13_old = p13_new [L485] p13_new = nomsg [L486] p21_old = p21_new [L487] p21_new = nomsg [L488] p23_old = p23_new [L489] p23_new = nomsg [L490] p31_old = p31_new [L491] p31_new = nomsg [L492] p32_old = p32_new [L493] p32_new = nomsg [L495] int check__tmp; [L496] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L498] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L500] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L502] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L504] COND FALSE !(((int)r1) >= 2) [L510] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L512] COND TRUE ((int)r1) < 2 [L514] COND FALSE !(((int)r1) >= 2) [L520] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L522] COND TRUE ((int)r1) < 2 [L524] check__tmp = 1 [L525] __return_1964 = check__tmp [L526] main__c1 = __return_1964 [L528] _Bool __tmp_2; [L529] __tmp_2 = main__c1 [L530] _Bool assert__arg; [L531] assert__arg = __tmp_2 [L532] COND FALSE !(assert__arg == 0) [L539] COND FALSE !(!(mode1 == 0)) [L545] COND TRUE ((int)r1) < 2 [L547] COND FALSE !(!(ep12 == 0)) [L558] COND FALSE !(!(ep13 == 0)) [L569] mode1 = 1 [L571] COND FALSE !(!(mode2 == 0)) [L577] COND TRUE ((int)r2) < 2 [L579] COND FALSE !(!(ep21 == 0)) [L590] COND FALSE !(!(ep23 == 0)) [L601] mode2 = 1 [L603] COND FALSE !(!(mode3 == 0)) [L609] COND TRUE ((int)r3) < 2 [L611] COND FALSE !(!(ep31 == 0)) [L622] COND FALSE !(!(ep32 == 0)) [L633] mode3 = 1 [L634] p12_old = p12_new [L635] p12_new = nomsg [L636] p13_old = p13_new [L637] p13_new = nomsg [L638] p21_old = p21_new [L639] p21_new = nomsg [L640] p23_old = p23_new [L641] p23_new = nomsg [L642] p31_old = p31_new [L643] p31_new = nomsg [L644] p32_old = p32_new [L645] p32_new = nomsg [L647] int check__tmp; [L648] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L650] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L652] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L654] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L656] COND FALSE !(((int)r1) >= 2) [L662] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L664] COND TRUE ((int)r1) < 2 [L666] COND FALSE !(((int)r1) >= 2) [L672] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L674] COND TRUE ((int)r1) < 2 [L676] check__tmp = 1 [L677] __return_2082 = check__tmp [L678] main__c1 = __return_2082 [L680] _Bool __tmp_3; [L681] __tmp_3 = main__c1 [L682] _Bool assert__arg; [L683] assert__arg = __tmp_3 [L684] COND FALSE !(assert__arg == 0) [L691] COND TRUE !(mode1 == 0) [L693] COND FALSE !(r1 == 255) [L699] r1 = r1 + 1 [L700] COND FALSE !(!(ep21 == 0)) [L708] COND FALSE !(!(ep31 == 0)) [L716] COND TRUE ((int)r1) == 2 [L718] COND TRUE ((int)max1) == ((int)id1) [L720] st1 = 1 [L721] mode1 = 0 [L723] COND TRUE !(mode2 == 0) [L725] COND FALSE !(r2 == 255) [L731] r2 = r2 + 1 [L732] COND FALSE !(!(ep12 == 0)) [L740] COND FALSE !(!(ep32 == 0)) [L748] COND TRUE ((int)r2) == 2 [L750] COND TRUE ((int)max2) == ((int)id2) [L752] st2 = 1 [L753] mode2 = 0 [L755] COND TRUE !(mode3 == 0) [L757] COND FALSE !(r3 == 255) [L763] r3 = r3 + 1 [L764] COND FALSE !(!(ep13 == 0)) [L772] COND FALSE !(!(ep23 == 0)) [L780] COND TRUE ((int)r3) == 2 [L782] COND TRUE ((int)max3) == ((int)id3) [L784] st3 = 1 [L785] mode3 = 0 [L786] p12_old = p12_new [L787] p12_new = nomsg [L788] p13_old = p13_new [L789] p13_new = nomsg [L790] p21_old = p21_new [L791] p21_new = nomsg [L792] p23_old = p23_new [L793] p23_new = nomsg [L794] p31_old = p31_new [L795] p31_new = nomsg [L796] p32_old = p32_new [L797] p32_new = nomsg [L799] int check__tmp; [L800] COND FALSE !(((((int)st1) + ((int)st2)) + ((int)st3)) <= 1) [L806] check__tmp = 0 [L807] __return_2816 = check__tmp [L808] main__c1 = __return_2816 [L810] _Bool __tmp_4; [L811] __tmp_4 = main__c1 [L812] _Bool assert__arg; [L813] assert__arg = __tmp_4 [L814] COND TRUE assert__arg == 0 [L816] CALL reach_error() [L4] __assert_fail("0", "pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 1135 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 69.6s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 56.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10788 SDtfs, 9585 SDslu, 8108 SDs, 0 SdLazy, 11080 SolverSat, 127 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6667occurred 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: 3.4s AutomataMinimizationTime, 7 MinimizatonAttempts, 12492 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...