/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 19:05:36,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 19:05:36,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 19:05:36,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 19:05:36,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 19:05:36,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 19:05:36,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 19:05:36,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 19:05:36,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 19:05:36,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 19:05:36,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 19:05:36,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 19:05:36,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 19:05:36,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 19:05:36,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 19:05:36,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 19:05:36,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 19:05:36,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 19:05:36,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 19:05:36,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 19:05:36,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 19:05:36,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 19:05:36,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 19:05:36,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 19:05:36,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 19:05:36,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 19:05:36,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 19:05:36,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 19:05:36,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 19:05:36,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 19:05:36,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 19:05:36,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 19:05:36,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 19:05:36,362 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 19:05:36,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 19:05:36,363 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 19:05:36,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 19:05:36,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 19:05:36,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 19:05:36,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 19:05:36,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 19:05:36,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 19:05:36,365 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 19:05:36,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 19:05:36,365 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 19:05:36,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 19:05:36,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 19:05:36,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 19:05:36,367 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 19:05:36,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 19:05:36,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 19:05:36,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 19:05:36,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 19:05:36,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 19:05:36,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 19:05:36,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 19:05:36,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 19:05:36,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 19:05:36,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 19:05:36,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 19:05:36,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 19:05:36,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 19:05:36,838 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 19:05:36,838 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 19:05:36,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 19:05:36,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047807ec8/c78c03e0014941908c79c225deaa0d3a/FLAG0ed2dd5fa [2020-10-23 19:05:37,926 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 19:05:37,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 19:05:37,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047807ec8/c78c03e0014941908c79c225deaa0d3a/FLAG0ed2dd5fa [2020-10-23 19:05:38,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047807ec8/c78c03e0014941908c79c225deaa0d3a [2020-10-23 19:05:38,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 19:05:38,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 19:05:38,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 19:05:38,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 19:05:38,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 19:05:38,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:05:38" (1/1) ... [2020-10-23 19:05:38,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25fe50fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:38, skipping insertion in model container [2020-10-23 19:05:38,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:05:38" (1/1) ... [2020-10-23 19:05:38,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 19:05:38,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 19:05:40,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:05:40,351 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 19:05:41,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:05:41,439 INFO L208 MainTranslator]: Completed translation [2020-10-23 19:05:41,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:41 WrapperNode [2020-10-23 19:05:41,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 19:05:41,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 19:05:41,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 19:05:41,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 19:05:41,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:41" (1/1) ... [2020-10-23 19:05:41,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:41" (1/1) ... [2020-10-23 19:05:41,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:41" (1/1) ... [2020-10-23 19:05:41,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:41" (1/1) ... [2020-10-23 19:05:41,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:41" (1/1) ... [2020-10-23 19:05:41,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:41" (1/1) ... [2020-10-23 19:05:41,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:41" (1/1) ... [2020-10-23 19:05:41,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 19:05:41,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 19:05:41,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 19:05:41,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 19:05:41,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 19:05:41,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 19:05:41,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 19:05:41,869 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 19:05:41,869 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 19:05:41,869 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 19:05:41,871 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 19:05:41,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 19:05:41,871 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 19:05:41,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 19:05:41,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 19:05:41,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-23 19:05:41,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 19:05:41,873 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 19:05:41,874 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 19:05:41,874 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 19:05:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 19:05:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 19:05:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 19:05:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 19:05:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-23 19:05:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-23 19:05:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 19:05:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 19:05:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 19:05:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 19:05:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 19:05:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 19:05:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 19:05:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 19:05:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 19:05:46,662 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 19:05:46,662 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 19:05:46,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:05:46 BoogieIcfgContainer [2020-10-23 19:05:46,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 19:05:46,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 19:05:46,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 19:05:46,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 19:05:46,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:05:38" (1/3) ... [2020-10-23 19:05:46,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fff8d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:05:46, skipping insertion in model container [2020-10-23 19:05:46,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:41" (2/3) ... [2020-10-23 19:05:46,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fff8d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:05:46, skipping insertion in model container [2020-10-23 19:05:46,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:05:46" (3/3) ... [2020-10-23 19:05:46,682 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 19:05:46,695 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 19:05:46,701 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 19:05:46,714 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 19:05:46,749 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 19:05:46,749 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 19:05:46,749 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 19:05:46,749 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 19:05:46,750 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 19:05:46,750 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 19:05:46,750 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 19:05:46,750 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 19:05:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states. [2020-10-23 19:05:46,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-10-23 19:05:46,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:46,836 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:05:46,836 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:46,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:46,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1245767728, now seen corresponding path program 1 times [2020-10-23 19:05:46,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:46,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607382088] [2020-10-23 19:05:46,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:50,396 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:05:50,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:05:51,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607382088] [2020-10-23 19:05:51,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:51,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:05:51,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043052171] [2020-10-23 19:05:51,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:05:51,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:51,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:05:51,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:05:51,227 INFO L87 Difference]: Start difference. First operand 1510 states. Second operand 5 states. [2020-10-23 19:06:08,328 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:06:12,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:12,104 INFO L93 Difference]: Finished difference Result 4464 states and 8062 transitions. [2020-10-23 19:06:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 19:06:12,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 494 [2020-10-23 19:06:12,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:12,156 INFO L225 Difference]: With dead ends: 4464 [2020-10-23 19:06:12,157 INFO L226 Difference]: Without dead ends: 2963 [2020-10-23 19:06:12,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:06:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-10-23 19:06:12,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2906. [2020-10-23 19:06:12,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2906 states. [2020-10-23 19:06:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4773 transitions. [2020-10-23 19:06:12,511 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4773 transitions. Word has length 494 [2020-10-23 19:06:12,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:12,518 INFO L481 AbstractCegarLoop]: Abstraction has 2906 states and 4773 transitions. [2020-10-23 19:06:12,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:06:12,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4773 transitions. [2020-10-23 19:06:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-10-23 19:06:12,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:12,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:06:12,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 19:06:12,543 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:12,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:12,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1929034647, now seen corresponding path program 1 times [2020-10-23 19:06:12,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:12,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141343915] [2020-10-23 19:06:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:14,363 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:06:14,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:06:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:06:14,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141343915] [2020-10-23 19:06:14,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:06:14,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:06:14,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399094615] [2020-10-23 19:06:14,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:06:14,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:06:14,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:06:14,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:14,906 INFO L87 Difference]: Start difference. First operand 2906 states and 4773 transitions. Second operand 4 states. [2020-10-23 19:06:35,806 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 435 [2020-10-23 19:06:39,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:39,314 INFO L93 Difference]: Finished difference Result 8439 states and 13822 transitions. [2020-10-23 19:06:39,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:06:39,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-10-23 19:06:39,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:39,352 INFO L225 Difference]: With dead ends: 8439 [2020-10-23 19:06:39,353 INFO L226 Difference]: Without dead ends: 5747 [2020-10-23 19:06:39,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:06:39,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2020-10-23 19:06:39,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5692. [2020-10-23 19:06:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5692 states. [2020-10-23 19:06:39,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 9325 transitions. [2020-10-23 19:06:39,595 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 9325 transitions. Word has length 496 [2020-10-23 19:06:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:39,597 INFO L481 AbstractCegarLoop]: Abstraction has 5692 states and 9325 transitions. [2020-10-23 19:06:39,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:06:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 9325 transitions. [2020-10-23 19:06:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-10-23 19:06:39,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:39,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:06:39,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 19:06:39,664 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:39,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:39,665 INFO L82 PathProgramCache]: Analyzing trace with hash -207510164, now seen corresponding path program 1 times [2020-10-23 19:06:39,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:39,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452048417] [2020-10-23 19:06:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:41,117 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:06:41,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:06:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:06:41,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452048417] [2020-10-23 19:06:41,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:06:41,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:06:41,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281888824] [2020-10-23 19:06:41,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:06:41,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:06:41,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:06:41,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:41,390 INFO L87 Difference]: Start difference. First operand 5692 states and 9325 transitions. Second operand 4 states. [2020-10-23 19:07:02,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:02,900 INFO L93 Difference]: Finished difference Result 16977 states and 27806 transitions. [2020-10-23 19:07:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:07:02,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-10-23 19:07:02,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:02,952 INFO L225 Difference]: With dead ends: 16977 [2020-10-23 19:07:02,952 INFO L226 Difference]: Without dead ends: 11337 [2020-10-23 19:07:02,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:02,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11337 states. [2020-10-23 19:07:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11337 to 5739. [2020-10-23 19:07:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5739 states. [2020-10-23 19:07:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 9399 transitions. [2020-10-23 19:07:03,276 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 9399 transitions. Word has length 497 [2020-10-23 19:07:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:03,276 INFO L481 AbstractCegarLoop]: Abstraction has 5739 states and 9399 transitions. [2020-10-23 19:07:03,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:07:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 9399 transitions. [2020-10-23 19:07:03,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-10-23 19:07:03,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:03,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:07:03,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 19:07:03,305 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:03,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:03,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1843891964, now seen corresponding path program 1 times [2020-10-23 19:07:03,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:03,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959282361] [2020-10-23 19:07:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:04,963 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:07:04,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:07:05,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959282361] [2020-10-23 19:07:05,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:05,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:07:05,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475300101] [2020-10-23 19:07:05,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:07:05,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:07:05,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:05,287 INFO L87 Difference]: Start difference. First operand 5739 states and 9399 transitions. Second operand 4 states. [2020-10-23 19:07:26,564 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 435 [2020-10-23 19:07:30,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:30,263 INFO L93 Difference]: Finished difference Result 16541 states and 26994 transitions. [2020-10-23 19:07:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:07:30,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-10-23 19:07:30,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:30,309 INFO L225 Difference]: With dead ends: 16541 [2020-10-23 19:07:30,309 INFO L226 Difference]: Without dead ends: 11201 [2020-10-23 19:07:30,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:07:30,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11201 states. [2020-10-23 19:07:30,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11201 to 11148. [2020-10-23 19:07:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11148 states. [2020-10-23 19:07:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11148 states to 11148 states and 18173 transitions. [2020-10-23 19:07:30,867 INFO L78 Accepts]: Start accepts. Automaton has 11148 states and 18173 transitions. Word has length 498 [2020-10-23 19:07:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:30,868 INFO L481 AbstractCegarLoop]: Abstraction has 11148 states and 18173 transitions. [2020-10-23 19:07:30,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:07:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 11148 states and 18173 transitions. [2020-10-23 19:07:30,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-10-23 19:07:30,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:30,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:07:30,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 19:07:30,897 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:30,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1044788809, now seen corresponding path program 1 times [2020-10-23 19:07:30,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:30,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7930215] [2020-10-23 19:07:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:32,374 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:07:32,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:07:32,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7930215] [2020-10-23 19:07:32,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:32,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:07:32,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001448089] [2020-10-23 19:07:32,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:07:32,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:32,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:07:32,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:32,733 INFO L87 Difference]: Start difference. First operand 11148 states and 18173 transitions. Second operand 4 states. [2020-10-23 19:07:57,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:57,409 INFO L93 Difference]: Finished difference Result 33186 states and 54073 transitions. [2020-10-23 19:07:57,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:07:57,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-10-23 19:07:57,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:57,462 INFO L225 Difference]: With dead ends: 33186 [2020-10-23 19:07:57,462 INFO L226 Difference]: Without dead ends: 22182 [2020-10-23 19:07:57,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:57,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22182 states. [2020-10-23 19:07:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22182 to 11246. [2020-10-23 19:07:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11246 states. [2020-10-23 19:07:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 18324 transitions. [2020-10-23 19:07:58,145 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 18324 transitions. Word has length 498 [2020-10-23 19:07:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:58,145 INFO L481 AbstractCegarLoop]: Abstraction has 11246 states and 18324 transitions. [2020-10-23 19:07:58,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:07:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 18324 transitions. [2020-10-23 19:07:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-10-23 19:07:58,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:58,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:07:58,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 19:07:58,174 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:58,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1340191421, now seen corresponding path program 1 times [2020-10-23 19:07:58,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:58,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798643574] [2020-10-23 19:07:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:59,689 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:07:59,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:07:59,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798643574] [2020-10-23 19:07:59,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:59,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:07:59,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82770702] [2020-10-23 19:07:59,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:07:59,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:59,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:07:59,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:59,909 INFO L87 Difference]: Start difference. First operand 11246 states and 18324 transitions. Second operand 4 states. [2020-10-23 19:08:25,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:08:25,415 INFO L93 Difference]: Finished difference Result 33321 states and 54254 transitions. [2020-10-23 19:08:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:08:25,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-10-23 19:08:25,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:08:25,465 INFO L225 Difference]: With dead ends: 33321 [2020-10-23 19:08:25,466 INFO L226 Difference]: Without dead ends: 22299 [2020-10-23 19:08:25,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:08:25,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22299 states. [2020-10-23 19:08:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22299 to 11363. [2020-10-23 19:08:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11363 states. [2020-10-23 19:08:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11363 states to 11363 states and 18470 transitions. [2020-10-23 19:08:26,174 INFO L78 Accepts]: Start accepts. Automaton has 11363 states and 18470 transitions. Word has length 499 [2020-10-23 19:08:26,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:08:26,174 INFO L481 AbstractCegarLoop]: Abstraction has 11363 states and 18470 transitions. [2020-10-23 19:08:26,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:08:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand 11363 states and 18470 transitions. [2020-10-23 19:08:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-10-23 19:08:26,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:08:26,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:08:26,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 19:08:26,198 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:08:26,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:08:26,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1929980682, now seen corresponding path program 1 times [2020-10-23 19:08:26,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:08:26,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937340078] [2020-10-23 19:08:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:08:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:27,837 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:08:27,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:08:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:08:28,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937340078] [2020-10-23 19:08:28,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:08:28,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:08:28,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916080072] [2020-10-23 19:08:28,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:08:28,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:08:28,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:08:28,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:08:28,071 INFO L87 Difference]: Start difference. First operand 11363 states and 18470 transitions. Second operand 4 states. [2020-10-23 19:08:46,253 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 435 [2020-10-23 19:08:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:08:46,539 INFO L93 Difference]: Finished difference Result 21948 states and 35245 transitions. [2020-10-23 19:08:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:08:46,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-10-23 19:08:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:08:46,566 INFO L225 Difference]: With dead ends: 21948 [2020-10-23 19:08:46,566 INFO L226 Difference]: Without dead ends: 15102 [2020-10-23 19:08:46,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:08:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15102 states. [2020-10-23 19:08:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15102 to 12963. [2020-10-23 19:08:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12963 states. [2020-10-23 19:08:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12963 states to 12963 states and 21118 transitions. [2020-10-23 19:08:47,207 INFO L78 Accepts]: Start accepts. Automaton has 12963 states and 21118 transitions. Word has length 500 [2020-10-23 19:08:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:08:47,208 INFO L481 AbstractCegarLoop]: Abstraction has 12963 states and 21118 transitions. [2020-10-23 19:08:47,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:08:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 12963 states and 21118 transitions. [2020-10-23 19:08:47,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-10-23 19:08:47,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:08:47,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:08:47,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 19:08:47,229 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:08:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:08:47,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1143939649, now seen corresponding path program 1 times [2020-10-23 19:08:47,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:08:47,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732421272] [2020-10-23 19:08:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:08:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:48,871 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:08:48,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:08:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:08:49,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732421272] [2020-10-23 19:08:49,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:08:49,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:08:49,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894117731] [2020-10-23 19:08:49,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:08:49,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:08:49,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:08:49,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:08:49,337 INFO L87 Difference]: Start difference. First operand 12963 states and 21118 transitions. Second operand 4 states. [2020-10-23 19:09:12,639 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 435 [2020-10-23 19:09:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:09:16,867 INFO L93 Difference]: Finished difference Result 37125 states and 60355 transitions. [2020-10-23 19:09:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:09:16,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-10-23 19:09:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:09:16,908 INFO L225 Difference]: With dead ends: 37125 [2020-10-23 19:09:16,909 INFO L226 Difference]: Without dead ends: 25131 [2020-10-23 19:09:16,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:09:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25131 states. [2020-10-23 19:09:18,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25131 to 25080. [2020-10-23 19:09:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25080 states. [2020-10-23 19:09:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 40687 transitions. [2020-10-23 19:09:18,164 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 40687 transitions. Word has length 500 [2020-10-23 19:09:18,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:09:18,164 INFO L481 AbstractCegarLoop]: Abstraction has 25080 states and 40687 transitions. [2020-10-23 19:09:18,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:09:18,164 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 40687 transitions. [2020-10-23 19:09:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-10-23 19:09:18,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:09:18,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:09:18,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 19:09:18,191 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:09:18,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:09:18,192 INFO L82 PathProgramCache]: Analyzing trace with hash 24303708, now seen corresponding path program 1 times [2020-10-23 19:09:18,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:09:18,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421274800] [2020-10-23 19:09:18,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:09:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:20,534 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:09:20,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:09:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:09:21,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421274800] [2020-10-23 19:09:21,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:09:21,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:09:21,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071224935] [2020-10-23 19:09:21,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:09:21,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:09:21,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:09:21,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:09:21,134 INFO L87 Difference]: Start difference. First operand 25080 states and 40687 transitions. Second operand 5 states. [2020-10-23 19:09:41,314 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:09:45,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:09:45,962 INFO L93 Difference]: Finished difference Result 73663 states and 119511 transitions. [2020-10-23 19:09:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:09:45,963 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 500 [2020-10-23 19:09:45,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:09:46,096 INFO L225 Difference]: With dead ends: 73663 [2020-10-23 19:09:46,096 INFO L226 Difference]: Without dead ends: 48801 [2020-10-23 19:09:46,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:09:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48801 states. [2020-10-23 19:09:48,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48801 to 48756. [2020-10-23 19:09:48,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48756 states. [2020-10-23 19:09:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48756 states to 48756 states and 78766 transitions. [2020-10-23 19:09:48,542 INFO L78 Accepts]: Start accepts. Automaton has 48756 states and 78766 transitions. Word has length 500 [2020-10-23 19:09:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:09:48,542 INFO L481 AbstractCegarLoop]: Abstraction has 48756 states and 78766 transitions. [2020-10-23 19:09:48,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:09:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 48756 states and 78766 transitions. [2020-10-23 19:09:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-10-23 19:09:48,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:09:48,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:09:48,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 19:09:48,581 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:09:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:09:48,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1506297529, now seen corresponding path program 1 times [2020-10-23 19:09:48,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:09:48,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727282589] [2020-10-23 19:09:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:09:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:50,242 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:09:50,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:09:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:09:50,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727282589] [2020-10-23 19:09:50,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:09:50,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:09:50,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703285920] [2020-10-23 19:09:50,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:09:50,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:09:50,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:09:50,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:09:50,886 INFO L87 Difference]: Start difference. First operand 48756 states and 78766 transitions. Second operand 4 states. [2020-10-23 19:10:17,122 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 435 [2020-10-23 19:10:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:10:22,303 INFO L93 Difference]: Finished difference Result 143277 states and 231275 transitions. [2020-10-23 19:10:22,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:10:22,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-10-23 19:10:22,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:10:22,411 INFO L225 Difference]: With dead ends: 143277 [2020-10-23 19:10:22,411 INFO L226 Difference]: Without dead ends: 96063 [2020-10-23 19:10:22,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:10:22,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96063 states. [2020-10-23 19:10:27,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96063 to 96022. [2020-10-23 19:10:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96022 states. [2020-10-23 19:10:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96022 states to 96022 states and 154548 transitions. [2020-10-23 19:10:27,339 INFO L78 Accepts]: Start accepts. Automaton has 96022 states and 154548 transitions. Word has length 502 [2020-10-23 19:10:27,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:10:27,339 INFO L481 AbstractCegarLoop]: Abstraction has 96022 states and 154548 transitions. [2020-10-23 19:10:27,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:10:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 96022 states and 154548 transitions. [2020-10-23 19:10:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-10-23 19:10:27,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:10:27,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:10:27,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 19:10:27,437 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:10:27,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:10:27,438 INFO L82 PathProgramCache]: Analyzing trace with hash 493166577, now seen corresponding path program 1 times [2020-10-23 19:10:27,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:10:27,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626411651] [2020-10-23 19:10:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:10:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:10:30,130 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:10:30,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:10:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:10:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:10:30,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626411651] [2020-10-23 19:10:30,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:10:30,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:10:30,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820299258] [2020-10-23 19:10:30,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:10:30,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:10:30,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:10:30,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:10:30,609 INFO L87 Difference]: Start difference. First operand 96022 states and 154548 transitions. Second operand 5 states. [2020-10-23 19:10:56,297 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:11:03,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:11:03,045 INFO L93 Difference]: Finished difference Result 284707 states and 458333 transitions. [2020-10-23 19:11:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:11:03,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 504 [2020-10-23 19:11:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:11:03,332 INFO L225 Difference]: With dead ends: 284707 [2020-10-23 19:11:03,332 INFO L226 Difference]: Without dead ends: 189022 [2020-10-23 19:11:03,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:11:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189022 states. [2020-10-23 19:11:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189022 to 188989. [2020-10-23 19:11:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188989 states. [2020-10-23 19:11:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188989 states to 188989 states and 302950 transitions. [2020-10-23 19:11:13,608 INFO L78 Accepts]: Start accepts. Automaton has 188989 states and 302950 transitions. Word has length 504 [2020-10-23 19:11:13,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:11:13,609 INFO L481 AbstractCegarLoop]: Abstraction has 188989 states and 302950 transitions. [2020-10-23 19:11:13,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:11:13,609 INFO L276 IsEmpty]: Start isEmpty. Operand 188989 states and 302950 transitions. [2020-10-23 19:11:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-10-23 19:11:14,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:11:14,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:11:14,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 19:11:14,003 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:11:14,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:11:14,004 INFO L82 PathProgramCache]: Analyzing trace with hash -547241806, now seen corresponding path program 1 times [2020-10-23 19:11:14,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:11:14,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858190129] [2020-10-23 19:11:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:11:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:11:16,312 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:11:16,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:11:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:11:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:11:16,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858190129] [2020-10-23 19:11:16,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:11:16,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:11:16,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113809158] [2020-10-23 19:11:16,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:11:16,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:11:16,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:11:16,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:11:16,674 INFO L87 Difference]: Start difference. First operand 188989 states and 302950 transitions. Second operand 5 states. [2020-10-23 19:11:47,836 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:11:58,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:11:58,060 INFO L93 Difference]: Finished difference Result 561355 states and 899646 transitions. [2020-10-23 19:11:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:11:58,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 506 [2020-10-23 19:11:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:11:58,975 INFO L225 Difference]: With dead ends: 561355 [2020-10-23 19:11:58,975 INFO L226 Difference]: Without dead ends: 373217 [2020-10-23 19:11:59,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:11:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373217 states. [2020-10-23 19:12:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373217 to 372495. [2020-10-23 19:12:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372495 states. [2020-10-23 19:12:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372495 states to 372495 states and 594728 transitions. [2020-10-23 19:12:21,158 INFO L78 Accepts]: Start accepts. Automaton has 372495 states and 594728 transitions. Word has length 506 [2020-10-23 19:12:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:12:21,158 INFO L481 AbstractCegarLoop]: Abstraction has 372495 states and 594728 transitions. [2020-10-23 19:12:21,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:12:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 372495 states and 594728 transitions. [2020-10-23 19:12:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-10-23 19:12:21,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:12:21,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:12:21,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 19:12:21,990 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:12:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:12:21,991 INFO L82 PathProgramCache]: Analyzing trace with hash -954450293, now seen corresponding path program 1 times [2020-10-23 19:12:21,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:12:21,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638120414] [2020-10-23 19:12:21,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:12:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:12:24,018 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:12:24,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:12:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:12:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:12:24,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638120414] [2020-10-23 19:12:24,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:12:24,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:12:24,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453211185] [2020-10-23 19:12:24,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:12:24,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:12:24,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:12:24,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:12:24,388 INFO L87 Difference]: Start difference. First operand 372495 states and 594728 transitions. Second operand 4 states. [2020-10-23 19:13:17,099 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 435 [2020-10-23 19:13:32,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:13:32,895 INFO L93 Difference]: Finished difference Result 1101403 states and 1756742 transitions. [2020-10-23 19:13:32,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:13:32,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 508 [2020-10-23 19:13:32,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:13:34,386 INFO L225 Difference]: With dead ends: 1101403 [2020-10-23 19:13:34,386 INFO L226 Difference]: Without dead ends: 736745 [2020-10-23 19:13:34,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:13:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736745 states. [2020-10-23 19:14:15,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736745 to 736023. [2020-10-23 19:14:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736023 states. [2020-10-23 19:14:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736023 states to 736023 states and 1170636 transitions. [2020-10-23 19:14:18,847 INFO L78 Accepts]: Start accepts. Automaton has 736023 states and 1170636 transitions. Word has length 508 [2020-10-23 19:14:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:14:18,848 INFO L481 AbstractCegarLoop]: Abstraction has 736023 states and 1170636 transitions. [2020-10-23 19:14:18,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:14:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 736023 states and 1170636 transitions.