/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.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:15:08,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:15:08,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:15:08,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 22:15:08,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 22:15:08,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 22:15:08,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 22:15:08,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 22:15:08,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 22:15:08,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 22:15:08,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 22:15:08,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 22:15:08,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:15:08,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:15:08,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:15:08,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:15:08,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:15:08,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:15:08,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:15:08,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:15:08,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:15:08,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:15:08,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:15:08,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:15:08,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:15:08,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 22:15:08,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 22:15:08,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 22:15:08,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 22:15:08,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 22:15:08,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 22:15:08,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 22:15:08,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 22:15:08,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:15:08,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:15:08,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:15:08,374 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 22:15:08,400 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:15:08,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:15:08,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:15:08,406 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:15:08,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:15:08,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:15:08,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:15:08,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:15:08,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:15:08,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:15:08,408 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:15:08,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:15:08,409 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:15:08,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:15:08,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:15:08,410 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:15:08,410 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:15:08,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:15:08,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:15:08,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:15:08,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:15:08,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:15:08,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:15:08,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:15:08,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:15:08,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:15:08,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:15:08,884 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:15:08,885 INFO L432 ainManager$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.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-23 22:15:08,986 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31311eacd/5bcfd41050c5453bb1e7f35d5899923d/FLAGcf2c55b0f [2020-10-23 22:15:09,891 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:15:09,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-23 22:15:09,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31311eacd/5bcfd41050c5453bb1e7f35d5899923d/FLAGcf2c55b0f [2020-10-23 22:15:10,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31311eacd/5bcfd41050c5453bb1e7f35d5899923d [2020-10-23 22:15:10,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:15:10,148 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:15:10,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:15:10,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:15:10,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:15:10,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:15:10" (1/1) ... [2020-10-23 22:15:10,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29c191da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:10, skipping insertion in model container [2020-10-23 22:15:10,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:15:10" (1/1) ... [2020-10-23 22:15:10,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:15:10,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:15:10,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:15:10,886 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:15:11,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:15:11,250 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:15:11,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:11 WrapperNode [2020-10-23 22:15:11,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:15:11,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:15:11,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:15:11,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:15:11,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:11" (1/1) ... [2020-10-23 22:15:11,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:11" (1/1) ... [2020-10-23 22:15:11,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:11" (1/1) ... [2020-10-23 22:15:11,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:11" (1/1) ... [2020-10-23 22:15:11,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:11" (1/1) ... [2020-10-23 22:15:11,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:11" (1/1) ... [2020-10-23 22:15:11,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:11" (1/1) ... [2020-10-23 22:15:11,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:15:11,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:15:11,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:15:11,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:15:11,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:11" (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 22:15:11,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:15:11,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:15:11,513 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:15:11,513 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 22:15:11,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:15:11,514 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:15:11,514 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:15:11,514 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:15:11,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:15:11,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 22:15:11,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 22:15:11,515 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 22:15:11,515 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 22:15:11,515 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 22:15:11,515 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 22:15:11,515 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 22:15:11,516 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 22:15:11,516 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 22:15:11,516 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 22:15:11,516 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 22:15:11,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:15:11,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:15:11,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:15:11,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:15:11,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:15:11,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:15:11,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:15:13,676 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:15:13,677 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 22:15:13,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:15:13 BoogieIcfgContainer [2020-10-23 22:15:13,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:15:13,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:15:13,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:15:13,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:15:13,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:15:10" (1/3) ... [2020-10-23 22:15:13,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bcd941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:15:13, skipping insertion in model container [2020-10-23 22:15:13,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:11" (2/3) ... [2020-10-23 22:15:13,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bcd941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:15:13, skipping insertion in model container [2020-10-23 22:15:13,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:15:13" (3/3) ... [2020-10-23 22:15:13,690 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-23 22:15:13,701 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:15:13,707 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:15:13,720 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:15:13,745 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:15:13,746 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:15:13,746 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:15:13,746 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:15:13,746 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:15:13,746 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:15:13,747 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:15:13,747 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:15:13,781 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states. [2020-10-23 22:15:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-10-23 22:15:13,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:15:13,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:15:13,836 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:15:13,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:15:13,851 INFO L82 PathProgramCache]: Analyzing trace with hash 940235653, now seen corresponding path program 1 times [2020-10-23 22:15:13,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:15:13,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751354313] [2020-10-23 22:15:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:15:13,943 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:15:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:15,220 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-23 22:15:15,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:15:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:15,732 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 22:15:15,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751354313] [2020-10-23 22:15:15,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:15:15,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:15:15,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69590133] [2020-10-23 22:15:15,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:15:15,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:15:15,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:15:15,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:15:15,769 INFO L87 Difference]: Start difference. First operand 923 states. Second operand 4 states. [2020-10-23 22:15:19,848 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-23 22:15:20,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:15:20,690 INFO L93 Difference]: Finished difference Result 1632 states and 2120 transitions. [2020-10-23 22:15:20,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:15:20,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2020-10-23 22:15:20,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:15:20,722 INFO L225 Difference]: With dead ends: 1632 [2020-10-23 22:15:20,722 INFO L226 Difference]: Without dead ends: 1242 [2020-10-23 22:15:20,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:15:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2020-10-23 22:15:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1234. [2020-10-23 22:15:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-10-23 22:15:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1503 transitions. [2020-10-23 22:15:20,903 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1503 transitions. Word has length 469 [2020-10-23 22:15:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:15:20,905 INFO L481 AbstractCegarLoop]: Abstraction has 1234 states and 1503 transitions. [2020-10-23 22:15:20,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:15:20,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1503 transitions. [2020-10-23 22:15:20,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-10-23 22:15:20,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:15:20,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:15:20,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:15:20,920 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:15:20,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:15:20,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1357826533, now seen corresponding path program 1 times [2020-10-23 22:15:20,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:15:20,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596536373] [2020-10-23 22:15:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:15:20,929 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:15:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:21,580 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-23 22:15:21,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:15:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:21,918 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 22:15:21,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596536373] [2020-10-23 22:15:21,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:15:21,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:15:21,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113024620] [2020-10-23 22:15:21,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:15:21,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:15:21,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:15:21,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:15:21,930 INFO L87 Difference]: Start difference. First operand 1234 states and 1503 transitions. Second operand 4 states. [2020-10-23 22:15:24,852 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-23 22:15:25,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:15:25,640 INFO L93 Difference]: Finished difference Result 2420 states and 3034 transitions. [2020-10-23 22:15:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:15:25,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2020-10-23 22:15:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:15:25,657 INFO L225 Difference]: With dead ends: 2420 [2020-10-23 22:15:25,657 INFO L226 Difference]: Without dead ends: 2019 [2020-10-23 22:15:25,662 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 [2020-10-23 22:15:25,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2020-10-23 22:15:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 2006. [2020-10-23 22:15:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2006 states. [2020-10-23 22:15:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 2485 transitions. [2020-10-23 22:15:25,798 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 2485 transitions. Word has length 469 [2020-10-23 22:15:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:15:25,801 INFO L481 AbstractCegarLoop]: Abstraction has 2006 states and 2485 transitions. [2020-10-23 22:15:25,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:15:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 2485 transitions. [2020-10-23 22:15:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-10-23 22:15:25,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:15:25,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:15:25,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:15:25,819 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:15:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:15:25,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1677660955, now seen corresponding path program 1 times [2020-10-23 22:15:25,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:15:25,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926322527] [2020-10-23 22:15:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:15:25,836 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:15:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:26,700 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-23 22:15:26,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:15:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:26,978 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 22:15:26,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926322527] [2020-10-23 22:15:26,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:15:26,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:15:26,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751075664] [2020-10-23 22:15:26,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:15:26,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:15:26,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:15:26,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:15:26,983 INFO L87 Difference]: Start difference. First operand 2006 states and 2485 transitions. Second operand 5 states. [2020-10-23 22:15:31,286 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-23 22:15:32,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:15:32,752 INFO L93 Difference]: Finished difference Result 5529 states and 6918 transitions. [2020-10-23 22:15:32,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:15:32,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 469 [2020-10-23 22:15:32,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:15:32,773 INFO L225 Difference]: With dead ends: 5529 [2020-10-23 22:15:32,773 INFO L226 Difference]: Without dead ends: 3716 [2020-10-23 22:15:32,778 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 [2020-10-23 22:15:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2020-10-23 22:15:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3713. [2020-10-23 22:15:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3713 states. [2020-10-23 22:15:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3713 states to 3713 states and 4610 transitions. [2020-10-23 22:15:33,014 INFO L78 Accepts]: Start accepts. Automaton has 3713 states and 4610 transitions. Word has length 469 [2020-10-23 22:15:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:15:33,015 INFO L481 AbstractCegarLoop]: Abstraction has 3713 states and 4610 transitions. [2020-10-23 22:15:33,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:15:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3713 states and 4610 transitions. [2020-10-23 22:15:33,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-10-23 22:15:33,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:15:33,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:15:33,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:15:33,024 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:15:33,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:15:33,025 INFO L82 PathProgramCache]: Analyzing trace with hash -720401121, now seen corresponding path program 1 times [2020-10-23 22:15:33,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:15:33,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402226281] [2020-10-23 22:15:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:15:33,030 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:15:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:33,496 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-23 22:15:33,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:15:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:33,694 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 22:15:33,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402226281] [2020-10-23 22:15:33,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:15:33,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:15:33,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927623231] [2020-10-23 22:15:33,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:15:33,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:15:33,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:15:33,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:15:33,697 INFO L87 Difference]: Start difference. First operand 3713 states and 4610 transitions. Second operand 4 states. [2020-10-23 22:15:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:15:39,579 INFO L93 Difference]: Finished difference Result 10714 states and 13382 transitions. [2020-10-23 22:15:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 22:15:39,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-10-23 22:15:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:15:39,627 INFO L225 Difference]: With dead ends: 10714 [2020-10-23 22:15:39,627 INFO L226 Difference]: Without dead ends: 7228 [2020-10-23 22:15:39,638 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 [2020-10-23 22:15:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7228 states. [2020-10-23 22:15:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7228 to 3715. [2020-10-23 22:15:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3715 states. [2020-10-23 22:15:40,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3715 states to 3715 states and 4612 transitions. [2020-10-23 22:15:40,040 INFO L78 Accepts]: Start accepts. Automaton has 3715 states and 4612 transitions. Word has length 470 [2020-10-23 22:15:40,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:15:40,041 INFO L481 AbstractCegarLoop]: Abstraction has 3715 states and 4612 transitions. [2020-10-23 22:15:40,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:15:40,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3715 states and 4612 transitions. [2020-10-23 22:15:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-10-23 22:15:40,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:15:40,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:15:40,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 22:15:40,050 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:15:40,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:15:40,051 INFO L82 PathProgramCache]: Analyzing trace with hash 588275944, now seen corresponding path program 1 times [2020-10-23 22:15:40,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:15:40,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318179808] [2020-10-23 22:15:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:15:40,057 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:15:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:40,587 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-23 22:15:40,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:15:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:40,890 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 22:15:40,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318179808] [2020-10-23 22:15:40,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:15:40,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:15:40,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113638777] [2020-10-23 22:15:40,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:15:40,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:15:40,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:15:40,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:15:40,894 INFO L87 Difference]: Start difference. First operand 3715 states and 4612 transitions. Second operand 4 states. [2020-10-23 22:15:45,743 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-23 22:15:47,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:15:47,160 INFO L93 Difference]: Finished difference Result 9574 states and 11930 transitions. [2020-10-23 22:15:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:15:47,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-10-23 22:15:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:15:47,192 INFO L225 Difference]: With dead ends: 9574 [2020-10-23 22:15:47,193 INFO L226 Difference]: Without dead ends: 6324 [2020-10-23 22:15:47,202 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 [2020-10-23 22:15:47,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6324 states. [2020-10-23 22:15:47,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6324 to 6321. [2020-10-23 22:15:47,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6321 states. [2020-10-23 22:15:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 7818 transitions. [2020-10-23 22:15:47,829 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 7818 transitions. Word has length 471 [2020-10-23 22:15:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:15:47,829 INFO L481 AbstractCegarLoop]: Abstraction has 6321 states and 7818 transitions. [2020-10-23 22:15:47,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:15:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 7818 transitions. [2020-10-23 22:15:47,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-10-23 22:15:47,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:15:47,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:15:47,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 22:15:47,842 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:15:47,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:15:47,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1914805912, now seen corresponding path program 1 times [2020-10-23 22:15:47,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:15:47,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144248589] [2020-10-23 22:15:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:15:47,852 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:15:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:48,481 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-23 22:15:48,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:15:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:48,778 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 22:15:48,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144248589] [2020-10-23 22:15:48,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:15:48,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:15:48,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737771467] [2020-10-23 22:15:48,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:15:48,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:15:48,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:15:48,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:15:48,783 INFO L87 Difference]: Start difference. First operand 6321 states and 7818 transitions. Second operand 5 states. [2020-10-23 22:15:53,036 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-23 22:15:54,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:15:54,725 INFO L93 Difference]: Finished difference Result 17881 states and 22145 transitions. [2020-10-23 22:15:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:15:54,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 471 [2020-10-23 22:15:54,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:15:54,773 INFO L225 Difference]: With dead ends: 17881 [2020-10-23 22:15:54,774 INFO L226 Difference]: Without dead ends: 11758 [2020-10-23 22:15:54,789 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 [2020-10-23 22:15:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11758 states. [2020-10-23 22:15:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11758 to 11755. [2020-10-23 22:15:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11755 states. [2020-10-23 22:15:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11755 states to 11755 states and 14457 transitions. [2020-10-23 22:15:55,645 INFO L78 Accepts]: Start accepts. Automaton has 11755 states and 14457 transitions. Word has length 471 [2020-10-23 22:15:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:15:55,646 INFO L481 AbstractCegarLoop]: Abstraction has 11755 states and 14457 transitions. [2020-10-23 22:15:55,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:15:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 11755 states and 14457 transitions. [2020-10-23 22:15:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-10-23 22:15:55,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:15:55,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:15:55,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 22:15:55,669 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:15:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:15:55,669 INFO L82 PathProgramCache]: Analyzing trace with hash 264417261, now seen corresponding path program 1 times [2020-10-23 22:15:55,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:15:55,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235544772] [2020-10-23 22:15:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:15:55,673 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:15:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:56,289 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-23 22:15:56,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:15:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:56,551 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 22:15:56,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235544772] [2020-10-23 22:15:56,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:15:56,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:15:56,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585441299] [2020-10-23 22:15:56,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:15:56,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:15:56,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:15:56,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:15:56,557 INFO L87 Difference]: Start difference. First operand 11755 states and 14457 transitions. Second operand 5 states. [2020-10-23 22:16:01,532 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-23 22:16:03,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:16:03,513 INFO L93 Difference]: Finished difference Result 33970 states and 41770 transitions. [2020-10-23 22:16:03,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:16:03,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 471 [2020-10-23 22:16:03,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:16:03,561 INFO L225 Difference]: With dead ends: 33970 [2020-10-23 22:16:03,561 INFO L226 Difference]: Without dead ends: 22488 [2020-10-23 22:16:03,587 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 [2020-10-23 22:16:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22488 states. [2020-10-23 22:16:05,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22488 to 22485. [2020-10-23 22:16:05,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22485 states. [2020-10-23 22:16:05,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22485 states to 22485 states and 27481 transitions. [2020-10-23 22:16:05,584 INFO L78 Accepts]: Start accepts. Automaton has 22485 states and 27481 transitions. Word has length 471 [2020-10-23 22:16:05,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:16:05,584 INFO L481 AbstractCegarLoop]: Abstraction has 22485 states and 27481 transitions. [2020-10-23 22:16:05,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:16:05,584 INFO L276 IsEmpty]: Start isEmpty. Operand 22485 states and 27481 transitions. [2020-10-23 22:16:05,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-10-23 22:16:05,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:16:05,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:16:05,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 22:16:05,624 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:16:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:16:05,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1825848491, now seen corresponding path program 1 times [2020-10-23 22:16:05,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:16:05,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524209003] [2020-10-23 22:16:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:16:05,629 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:16:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:16:06,181 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-23 22:16:06,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:16:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:16:06,470 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 22:16:06,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524209003] [2020-10-23 22:16:06,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:16:06,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:16:06,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124573084] [2020-10-23 22:16:06,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:16:06,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:16:06,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:16:06,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:16:06,473 INFO L87 Difference]: Start difference. First operand 22485 states and 27481 transitions. Second operand 4 states. [2020-10-23 22:16:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:16:15,710 INFO L93 Difference]: Finished difference Result 66842 states and 81750 transitions. [2020-10-23 22:16:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 22:16:15,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2020-10-23 22:16:15,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:16:15,798 INFO L225 Difference]: With dead ends: 66842 [2020-10-23 22:16:15,799 INFO L226 Difference]: Without dead ends: 44680 [2020-10-23 22:16:15,846 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 [2020-10-23 22:16:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44680 states. [2020-10-23 22:16:18,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44680 to 22495. [2020-10-23 22:16:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22495 states. [2020-10-23 22:16:18,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22495 states to 22495 states and 27491 transitions. [2020-10-23 22:16:18,204 INFO L78 Accepts]: Start accepts. Automaton has 22495 states and 27491 transitions. Word has length 472 [2020-10-23 22:16:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:16:18,204 INFO L481 AbstractCegarLoop]: Abstraction has 22495 states and 27491 transitions. [2020-10-23 22:16:18,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:16:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 22495 states and 27491 transitions. [2020-10-23 22:16:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-10-23 22:16:18,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:16:18,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:16:18,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 22:16:18,236 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:16:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:16:18,237 INFO L82 PathProgramCache]: Analyzing trace with hash -406991568, now seen corresponding path program 1 times [2020-10-23 22:16:18,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:16:18,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111732735] [2020-10-23 22:16:18,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:16:18,241 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:16:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:16:18,712 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-23 22:16:18,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:16:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:16:18,902 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 22:16:18,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111732735] [2020-10-23 22:16:18,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:16:18,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:16:18,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536242438] [2020-10-23 22:16:18,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:16:18,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:16:18,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:16:18,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:16:18,905 INFO L87 Difference]: Start difference. First operand 22495 states and 27491 transitions. Second operand 4 states. [2020-10-23 22:16:26,296 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-23 22:16:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:16:29,133 INFO L93 Difference]: Finished difference Result 64202 states and 78403 transitions. [2020-10-23 22:16:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:16:29,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-10-23 22:16:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:16:29,208 INFO L225 Difference]: With dead ends: 64202 [2020-10-23 22:16:29,208 INFO L226 Difference]: Without dead ends: 43209 [2020-10-23 22:16:29,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:16:29,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43209 states. [2020-10-23 22:16:33,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43209 to 43206. [2020-10-23 22:16:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43206 states. [2020-10-23 22:16:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43206 states to 43206 states and 52421 transitions. [2020-10-23 22:16:33,638 INFO L78 Accepts]: Start accepts. Automaton has 43206 states and 52421 transitions. Word has length 473 [2020-10-23 22:16:33,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:16:33,639 INFO L481 AbstractCegarLoop]: Abstraction has 43206 states and 52421 transitions. [2020-10-23 22:16:33,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:16:33,639 INFO L276 IsEmpty]: Start isEmpty. Operand 43206 states and 52421 transitions. [2020-10-23 22:16:33,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-10-23 22:16:33,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:16:33,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:16:33,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 22:16:33,679 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:16:33,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:16:33,679 INFO L82 PathProgramCache]: Analyzing trace with hash 53882288, now seen corresponding path program 1 times [2020-10-23 22:16:33,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:16:33,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417763639] [2020-10-23 22:16:33,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:16:33,683 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:16:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:16:34,206 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-23 22:16:34,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:16:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:16:34,522 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 22:16:34,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417763639] [2020-10-23 22:16:34,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:16:34,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:16:34,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180163318] [2020-10-23 22:16:34,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:16:34,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:16:34,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:16:34,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:16:34,524 INFO L87 Difference]: Start difference. First operand 43206 states and 52421 transitions. Second operand 5 states. [2020-10-23 22:16:43,326 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-23 22:16:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:16:47,782 INFO L93 Difference]: Finished difference Result 116478 states and 141000 transitions. [2020-10-23 22:16:47,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:16:47,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 473 [2020-10-23 22:16:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:16:47,868 INFO L225 Difference]: With dead ends: 116478 [2020-10-23 22:16:47,868 INFO L226 Difference]: Without dead ends: 73571 [2020-10-23 22:16:47,915 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 [2020-10-23 22:16:47,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73571 states. [2020-10-23 22:16:55,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73571 to 73568. [2020-10-23 22:16:55,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73568 states. [2020-10-23 22:16:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73568 states to 73568 states and 88344 transitions. [2020-10-23 22:16:55,770 INFO L78 Accepts]: Start accepts. Automaton has 73568 states and 88344 transitions. Word has length 473 [2020-10-23 22:16:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:16:55,770 INFO L481 AbstractCegarLoop]: Abstraction has 73568 states and 88344 transitions. [2020-10-23 22:16:55,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:16:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 73568 states and 88344 transitions. [2020-10-23 22:16:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-10-23 22:16:55,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:16:55,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:16:55,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 22:16:55,822 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:16:55,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:16:55,823 INFO L82 PathProgramCache]: Analyzing trace with hash 397201741, now seen corresponding path program 1 times [2020-10-23 22:16:55,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:16:55,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067441431] [2020-10-23 22:16:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:16:55,828 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:16:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:16:56,557 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-23 22:16:56,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:16:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:16:56,835 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 22:16:56,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067441431] [2020-10-23 22:16:56,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:16:56,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:16:56,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566904196] [2020-10-23 22:16:56,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:16:56,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:16:56,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:16:56,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:16:56,839 INFO L87 Difference]: Start difference. First operand 73568 states and 88344 transitions. Second operand 5 states. [2020-10-23 22:17:06,488 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-23 22:17:11,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:17:11,326 INFO L93 Difference]: Finished difference Result 147634 states and 177259 transitions. [2020-10-23 22:17:11,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:17:11,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 473 [2020-10-23 22:17:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:17:11,538 INFO L225 Difference]: With dead ends: 147634 [2020-10-23 22:17:11,538 INFO L226 Difference]: Without dead ends: 74866 [2020-10-23 22:17:11,596 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 22:17:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74866 states. [2020-10-23 22:17:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74866 to 74238. [2020-10-23 22:17:19,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74238 states. [2020-10-23 22:17:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74238 states to 74238 states and 89081 transitions. [2020-10-23 22:17:19,737 INFO L78 Accepts]: Start accepts. Automaton has 74238 states and 89081 transitions. Word has length 473 [2020-10-23 22:17:19,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:17:19,737 INFO L481 AbstractCegarLoop]: Abstraction has 74238 states and 89081 transitions. [2020-10-23 22:17:19,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:17:19,737 INFO L276 IsEmpty]: Start isEmpty. Operand 74238 states and 89081 transitions. [2020-10-23 22:17:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-10-23 22:17:19,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:17:19,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:17:19,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 22:17:19,792 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:17:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:17:19,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1654069537, now seen corresponding path program 1 times [2020-10-23 22:17:19,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:17:19,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586681165] [2020-10-23 22:17:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:17:19,797 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:17:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:17:20,508 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-23 22:17:20,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:17:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:17:20,900 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 22:17:20,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586681165] [2020-10-23 22:17:20,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:17:20,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:17:20,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513878192] [2020-10-23 22:17:20,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:17:20,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:17:20,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:17:20,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:17:20,903 INFO L87 Difference]: Start difference. First operand 74238 states and 89081 transitions. Second operand 4 states. [2020-10-23 22:17:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:17:43,911 INFO L93 Difference]: Finished difference Result 219322 states and 263360 transitions. [2020-10-23 22:17:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 22:17:43,912 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 474 [2020-10-23 22:17:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:17:44,258 INFO L225 Difference]: With dead ends: 219322 [2020-10-23 22:17:44,258 INFO L226 Difference]: Without dead ends: 147619 [2020-10-23 22:17:44,321 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 [2020-10-23 22:17:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147619 states. [2020-10-23 22:17:54,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147619 to 74278. [2020-10-23 22:17:54,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74278 states. [2020-10-23 22:17:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74278 states to 74278 states and 89121 transitions. [2020-10-23 22:17:54,520 INFO L78 Accepts]: Start accepts. Automaton has 74278 states and 89121 transitions. Word has length 474 [2020-10-23 22:17:54,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:17:54,520 INFO L481 AbstractCegarLoop]: Abstraction has 74278 states and 89121 transitions. [2020-10-23 22:17:54,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:17:54,520 INFO L276 IsEmpty]: Start isEmpty. Operand 74278 states and 89121 transitions. [2020-10-23 22:17:54,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-10-23 22:17:54,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:17:54,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:17:54,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 22:17:54,561 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:17:54,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:17:54,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1770171824, now seen corresponding path program 1 times [2020-10-23 22:17:54,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:17:54,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198884076] [2020-10-23 22:17:54,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:17:54,565 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:17:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:17:55,136 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-23 22:17:55,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:17:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:17:55,336 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 22:17:55,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198884076] [2020-10-23 22:17:55,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:17:55,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:17:55,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148642286] [2020-10-23 22:17:55,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:17:55,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:17:55,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:17:55,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:17:55,339 INFO L87 Difference]: Start difference. First operand 74278 states and 89121 transitions. Second operand 5 states. [2020-10-23 22:18:06,933 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-23 22:18:12,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:18:12,414 INFO L93 Difference]: Finished difference Result 150264 states and 180169 transitions. [2020-10-23 22:18:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:18:12,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 475 [2020-10-23 22:18:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:18:12,507 INFO L225 Difference]: With dead ends: 150264 [2020-10-23 22:18:12,507 INFO L226 Difference]: Without dead ends: 76629 [2020-10-23 22:18:12,578 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 22:18:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76629 states. [2020-10-23 22:18:22,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76629 to 75642. [2020-10-23 22:18:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75642 states. [2020-10-23 22:18:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75642 states to 75642 states and 90591 transitions. [2020-10-23 22:18:23,018 INFO L78 Accepts]: Start accepts. Automaton has 75642 states and 90591 transitions. Word has length 475 [2020-10-23 22:18:23,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:18:23,019 INFO L481 AbstractCegarLoop]: Abstraction has 75642 states and 90591 transitions. [2020-10-23 22:18:23,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:18:23,019 INFO L276 IsEmpty]: Start isEmpty. Operand 75642 states and 90591 transitions. [2020-10-23 22:18:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-10-23 22:18:23,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:18:23,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:18:23,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 22:18:23,263 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:18:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:18:23,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1923931909, now seen corresponding path program 1 times [2020-10-23 22:18:23,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:18:23,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720954830] [2020-10-23 22:18:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:18:23,270 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:18:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 22:18:23,376 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 22:18:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 22:18:23,498 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 22:18:24,374 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 22:18:24,375 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 22:18:24,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 22:18:24,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:18:24 BoogieIcfgContainer [2020-10-23 22:18:24,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 22:18:24,441 INFO L168 Benchmark]: Toolchain (without parser) took 194298.85 ms. Allocated memory was 154.1 MB in the beginning and 6.9 GB in the end (delta: 6.8 GB). Free memory was 129.4 MB in the beginning and 4.9 GB in the end (delta: -4.7 GB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. [2020-10-23 22:18:24,441 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory is still 128.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:18:24,442 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1098.90 ms. Allocated memory is still 154.1 MB. Free memory was 128.5 MB in the beginning and 100.2 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2020-10-23 22:18:24,442 INFO L168 Benchmark]: Boogie Preprocessor took 157.65 ms. Allocated memory is still 154.1 MB. Free memory was 100.2 MB in the beginning and 96.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-10-23 22:18:24,443 INFO L168 Benchmark]: RCFGBuilder took 2269.39 ms. Allocated memory is still 154.1 MB. Free memory was 96.0 MB in the beginning and 89.9 MB in the end (delta: 6.1 MB). Peak memory consumption was 61.5 MB. Max. memory is 8.0 GB. [2020-10-23 22:18:24,444 INFO L168 Benchmark]: TraceAbstraction took 190756.80 ms. Allocated memory was 154.1 MB in the beginning and 6.9 GB in the end (delta: 6.8 GB). Free memory was 89.9 MB in the beginning and 4.9 GB in the end (delta: -4.8 GB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. [2020-10-23 22:18:24,446 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory is still 128.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 1098.90 ms. Allocated memory is still 154.1 MB. Free memory was 128.5 MB in the beginning and 100.2 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 157.65 ms. Allocated memory is still 154.1 MB. Free memory was 100.2 MB in the beginning and 96.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 2269.39 ms. Allocated memory is still 154.1 MB. Free memory was 96.0 MB in the beginning and 89.9 MB in the end (delta: 6.1 MB). Peak memory consumption was 61.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 190756.80 ms. Allocated memory was 154.1 MB in the beginning and 6.9 GB in the end (delta: 6.8 GB). Free memory was 89.9 MB in the beginning and 4.9 GB in the end (delta: -4.8 GB). Peak memory consumption was 2.0 GB. 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; [L16] msg_t nomsg = (msg_t )-1; [L17] port_t p12 = 0; [L18] char p12_old = '\x0'; [L19] char p12_new = '\x0'; [L20] _Bool ep12 = 0; [L21] port_t p13 = 0; [L22] char p13_old = '\x0'; [L23] char p13_new = '\x0'; [L24] _Bool ep13 = 0; [L25] port_t p21 = 0; [L26] char p21_old = '\x0'; [L27] char p21_new = '\x0'; [L28] _Bool ep21 = 0; [L29] port_t p23 = 0; [L30] char p23_old = '\x0'; [L31] char p23_new = '\x0'; [L32] _Bool ep23 = 0; [L33] port_t p31 = 0; [L34] char p31_old = '\x0'; [L35] char p31_new = '\x0'; [L36] _Bool ep31 = 0; [L37] port_t p32 = 0; [L38] char p32_old = '\x0'; [L39] char p32_new = '\x0'; [L40] _Bool ep32 = 0; [L41] char id1 = '\x0'; [L42] char r1 = '\x0'; [L43] char st1 = '\x0'; [L44] char nl1 = '\x0'; [L45] char m1 = '\x0'; [L46] char max1 = '\x0'; [L47] _Bool mode1 = 0; [L48] _Bool newmax1 = 0; [L49] char id2 = '\x0'; [L50] char r2 = '\x0'; [L51] char st2 = '\x0'; [L52] char nl2 = '\x0'; [L53] char m2 = '\x0'; [L54] char max2 = '\x0'; [L55] _Bool mode2 = 0; [L56] _Bool newmax2 = 0; [L57] char id3 = '\x0'; [L58] char r3 = '\x0'; [L59] char st3 = '\x0'; [L60] char nl3 = '\x0'; [L61] char m3 = '\x0'; [L62] char max3 = '\x0'; [L63] _Bool mode3 = 0; [L64] _Bool newmax3 = 0; [L68] void (*nodes[3])() = { &node1, &node2, &node3 }; [L72] int __return_1863; [L73] int __return_2009; [L74] int __return_2142; [L75] int __return_2281; [L76] int __return_2419; [L77] int __tmp_2420_0; [L78] int __return_2543; [L79] int __return_2433; [L82] int main__c1; [L83] int main__i2; [L84] main__c1 = 0 [L85] ep12 = __VERIFIER_nondet_bool() [L86] ep13 = __VERIFIER_nondet_bool() [L87] ep21 = __VERIFIER_nondet_bool() [L88] ep23 = __VERIFIER_nondet_bool() [L89] ep31 = __VERIFIER_nondet_bool() [L90] ep32 = __VERIFIER_nondet_bool() [L91] id1 = __VERIFIER_nondet_char() [L92] r1 = __VERIFIER_nondet_char() [L93] st1 = __VERIFIER_nondet_char() [L94] nl1 = __VERIFIER_nondet_char() [L95] m1 = __VERIFIER_nondet_char() [L96] max1 = __VERIFIER_nondet_char() [L97] mode1 = __VERIFIER_nondet_bool() [L98] newmax1 = __VERIFIER_nondet_bool() [L99] id2 = __VERIFIER_nondet_char() [L100] r2 = __VERIFIER_nondet_char() [L101] st2 = __VERIFIER_nondet_char() [L102] nl2 = __VERIFIER_nondet_char() [L103] m2 = __VERIFIER_nondet_char() [L104] max2 = __VERIFIER_nondet_char() [L105] mode2 = __VERIFIER_nondet_bool() [L106] newmax2 = __VERIFIER_nondet_bool() [L107] id3 = __VERIFIER_nondet_char() [L108] r3 = __VERIFIER_nondet_char() [L109] st3 = __VERIFIER_nondet_char() [L110] nl3 = __VERIFIER_nondet_char() [L111] m3 = __VERIFIER_nondet_char() [L112] max3 = __VERIFIER_nondet_char() [L113] mode3 = __VERIFIER_nondet_bool() [L114] newmax3 = __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)) [L2435] COND FALSE !(!(init__r131 == 0)) [L2451] init__tmp = 0 [L145] init__r122 = (_Bool)init__tmp [L146] COND FALSE !(!(init__r131 == 0)) [L2412] COND FALSE !(!(init__r121 == 0)) [L2428] init__tmp___0 = 0 [L150] init__r132 = (_Bool)init__tmp___0 [L151] COND FALSE !(!(init__r211 == 0)) [L2389] COND FALSE !(!(init__r231 == 0)) [L2405] init__tmp___1 = 0 [L155] init__r212 = (_Bool)init__tmp___1 [L156] COND FALSE !(!(init__r231 == 0)) [L2366] COND FALSE !(!(init__r211 == 0)) [L2382] init__tmp___2 = 0 [L160] init__r232 = (_Bool)init__tmp___2 [L161] COND FALSE !(!(init__r311 == 0)) [L2343] COND FALSE !(!(init__r321 == 0)) [L2359] init__tmp___3 = 0 [L165] init__r312 = (_Bool)init__tmp___3 [L166] COND FALSE !(!(init__r321 == 0)) [L2320] COND FALSE !(!(init__r311 == 0)) [L2336] 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] COND TRUE !(newmax1 == 0) [L215] COND TRUE !(newmax2 == 0) [L217] COND TRUE !(newmax3 == 0) [L219] init__tmp___5 = 1 [L220] __return_1863 = init__tmp___5 [L221] main__i2 = __return_1863 [L222] COND TRUE main__i2 != 0 [L224] p12_old = nomsg [L225] p12_new = nomsg [L226] p13_old = nomsg [L227] p13_new = nomsg [L228] p21_old = nomsg [L229] p21_new = nomsg [L230] p23_old = nomsg [L231] p23_new = nomsg [L232] p31_old = nomsg [L233] p31_new = nomsg [L234] p32_old = nomsg [L235] p32_new = nomsg [L236] main__i2 = 0 [L237] COND TRUE main__i2 < 6 [L240] _Bool node1__newmax; [L241] node1__newmax = 0 [L242] COND FALSE !(!(mode1 == 0)) [L248] COND TRUE ((int)r1) < 2 [L250] COND FALSE !(!(ep12 == 0)) [L263] COND FALSE !(!(ep13 == 0)) [L276] mode1 = 1 [L278] _Bool node2__newmax; [L279] node2__newmax = 0 [L280] COND FALSE !(!(mode2 == 0)) [L286] COND TRUE ((int)r2) < 2 [L288] COND FALSE !(!(ep21 == 0)) [L301] COND FALSE !(!(ep23 == 0)) [L314] mode2 = 1 [L316] _Bool node3__newmax; [L317] node3__newmax = 0 [L318] COND FALSE !(!(mode3 == 0)) [L324] COND TRUE ((int)r3) < 2 [L326] COND FALSE !(!(ep31 == 0)) [L339] COND FALSE !(!(ep32 == 0)) [L352] mode3 = 1 [L353] p12_old = p12_new [L354] p12_new = nomsg [L355] p13_old = p13_new [L356] p13_new = nomsg [L357] p21_old = p21_new [L358] p21_new = nomsg [L359] p23_old = p23_new [L360] p23_new = nomsg [L361] p31_old = p31_new [L362] p31_new = nomsg [L363] p32_old = p32_new [L364] p32_new = nomsg [L366] int check__tmp; [L367] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L369] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L371] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L373] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L375] COND FALSE !(((int)r1) >= 2) [L381] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L383] COND TRUE ((int)r1) < 2 [L385] COND FALSE !(((int)r1) >= 2) [L391] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L393] COND TRUE ((int)r1) < 2 [L395] check__tmp = 1 [L396] __return_2009 = check__tmp [L397] main__c1 = __return_2009 [L399] _Bool __tmp_1; [L400] __tmp_1 = main__c1 [L401] _Bool assert__arg; [L402] assert__arg = __tmp_1 [L403] COND FALSE !(assert__arg == 0) [L409] int main____CPAchecker_TMP_0 = main__i2; [L410] main__i2 = main__i2 + 1 [L411] COND TRUE main__i2 < 6 [L414] _Bool node1__newmax; [L415] node1__newmax = 0 [L416] COND TRUE !(mode1 == 0) [L418] r1 = (char)(((int)r1) + 1) [L419] COND FALSE !(!(ep21 == 0)) [L428] COND FALSE !(!(ep31 == 0)) [L437] newmax1 = node1__newmax [L438] COND FALSE !(((int)r1) == 2) [L444] mode1 = 0 [L446] _Bool node2__newmax; [L447] node2__newmax = 0 [L448] COND TRUE !(mode2 == 0) [L450] r2 = (char)(((int)r2) + 1) [L451] COND FALSE !(!(ep12 == 0)) [L460] COND FALSE !(!(ep32 == 0)) [L469] newmax2 = node2__newmax [L470] COND FALSE !(((int)r2) == 2) [L476] mode2 = 0 [L478] _Bool node3__newmax; [L479] node3__newmax = 0 [L480] COND TRUE !(mode3 == 0) [L482] r3 = (char)(((int)r3) + 1) [L483] COND FALSE !(!(ep13 == 0)) [L492] COND FALSE !(!(ep23 == 0)) [L501] newmax3 = node3__newmax [L502] COND FALSE !(((int)r3) == 2) [L508] mode3 = 0 [L509] p12_old = p12_new [L510] p12_new = nomsg [L511] p13_old = p13_new [L512] p13_new = nomsg [L513] p21_old = p21_new [L514] p21_new = nomsg [L515] p23_old = p23_new [L516] p23_new = nomsg [L517] p31_old = p31_new [L518] p31_new = nomsg [L519] p32_old = p32_new [L520] p32_new = nomsg [L522] int check__tmp; [L523] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L525] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L527] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L529] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L531] COND FALSE !(((int)r1) >= 2) [L537] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L539] COND TRUE ((int)r1) < 2 [L541] COND FALSE !(((int)r1) >= 2) [L547] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L549] COND TRUE ((int)r1) < 2 [L551] check__tmp = 1 [L552] __return_2142 = check__tmp [L553] main__c1 = __return_2142 [L555] _Bool __tmp_2; [L556] __tmp_2 = main__c1 [L557] _Bool assert__arg; [L558] assert__arg = __tmp_2 [L559] COND FALSE !(assert__arg == 0) [L565] int main____CPAchecker_TMP_0 = main__i2; [L566] main__i2 = main__i2 + 1 [L567] COND TRUE main__i2 < 6 [L570] _Bool node1__newmax; [L571] node1__newmax = 0 [L572] COND FALSE !(!(mode1 == 0)) [L578] COND TRUE ((int)r1) < 2 [L580] COND FALSE !(!(ep12 == 0)) [L593] COND FALSE !(!(ep13 == 0)) [L606] mode1 = 1 [L608] _Bool node2__newmax; [L609] node2__newmax = 0 [L610] COND FALSE !(!(mode2 == 0)) [L616] COND TRUE ((int)r2) < 2 [L618] COND FALSE !(!(ep21 == 0)) [L631] COND FALSE !(!(ep23 == 0)) [L644] mode2 = 1 [L646] _Bool node3__newmax; [L647] node3__newmax = 0 [L648] COND FALSE !(!(mode3 == 0)) [L654] COND TRUE ((int)r3) < 2 [L656] COND FALSE !(!(ep31 == 0)) [L669] COND FALSE !(!(ep32 == 0)) [L682] mode3 = 1 [L683] p12_old = p12_new [L684] p12_new = nomsg [L685] p13_old = p13_new [L686] p13_new = nomsg [L687] p21_old = p21_new [L688] p21_new = nomsg [L689] p23_old = p23_new [L690] p23_new = nomsg [L691] p31_old = p31_new [L692] p31_new = nomsg [L693] p32_old = p32_new [L694] p32_new = nomsg [L696] int check__tmp; [L697] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L699] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L701] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L703] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L705] COND FALSE !(((int)r1) >= 2) [L711] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L713] COND TRUE ((int)r1) < 2 [L715] COND FALSE !(((int)r1) >= 2) [L721] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L723] COND TRUE ((int)r1) < 2 [L725] check__tmp = 1 [L726] __return_2281 = check__tmp [L727] main__c1 = __return_2281 [L729] _Bool __tmp_3; [L730] __tmp_3 = main__c1 [L731] _Bool assert__arg; [L732] assert__arg = __tmp_3 [L733] COND FALSE !(assert__arg == 0) [L739] int main____CPAchecker_TMP_0 = main__i2; [L740] main__i2 = main__i2 + 1 [L741] COND TRUE main__i2 < 6 [L744] _Bool node1__newmax; [L745] node1__newmax = 0 [L746] COND TRUE !(mode1 == 0) [L748] r1 = (char)(((int)r1) + 1) [L749] COND FALSE !(!(ep21 == 0)) [L758] COND FALSE !(!(ep31 == 0)) [L767] newmax1 = node1__newmax [L768] COND TRUE ((int)r1) == 2 [L770] COND TRUE ((int)max1) == ((int)id1) [L772] st1 = 1 [L774] mode1 = 0 [L776] _Bool node2__newmax; [L777] node2__newmax = 0 [L778] COND TRUE !(mode2 == 0) [L780] r2 = (char)(((int)r2) + 1) [L781] COND FALSE !(!(ep12 == 0)) [L790] COND FALSE !(!(ep32 == 0)) [L799] newmax2 = node2__newmax [L800] COND TRUE ((int)r2) == 2 [L802] COND TRUE ((int)max2) == ((int)id2) [L804] st2 = 1 [L806] mode2 = 0 [L808] _Bool node3__newmax; [L809] node3__newmax = 0 [L810] COND TRUE !(mode3 == 0) [L812] r3 = (char)(((int)r3) + 1) [L813] COND FALSE !(!(ep13 == 0)) [L822] COND FALSE !(!(ep23 == 0)) [L831] newmax3 = node3__newmax [L832] COND TRUE ((int)r3) == 2 [L834] COND TRUE ((int)max3) == ((int)id3) [L836] st3 = 1 [L838] mode3 = 0 [L839] p12_old = p12_new [L840] p12_new = nomsg [L841] p13_old = p13_new [L842] p13_new = nomsg [L843] p21_old = p21_new [L844] p21_new = nomsg [L845] p23_old = p23_new [L846] p23_new = nomsg [L847] p31_old = p31_new [L848] p31_new = nomsg [L849] p32_old = p32_new [L850] p32_new = nomsg [L852] int check__tmp; [L853] COND FALSE !(((((int)st1) + ((int)st2)) + ((int)st3)) <= 1) [L1535] check__tmp = 0 [L881] __return_2419 = check__tmp [L882] main__c1 = __return_2419 [L883] __tmp_2420_0 = main____CPAchecker_TMP_0 [L885] main____CPAchecker_TMP_0 = __tmp_2420_0 [L887] _Bool __tmp_4; [L888] __tmp_4 = main__c1 [L889] _Bool assert__arg; [L890] assert__arg = __tmp_4 [L891] COND TRUE assert__arg == 0 [L893] CALL reach_error() [L4] __assert_fail("0", "pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 928 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 190.6s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 128.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19586 SDtfs, 14984 SDslu, 12765 SDs, 0 SdLazy, 20191 SolverSat, 145 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 49.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 9.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75642occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 47.7s AutomataMinimizationTime, 13 MinimizatonAttempts, 100693 StatesRemovedByMinimization, 13 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...