/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:48:05,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:48:05,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:48:05,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 02:48:05,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 02:48:05,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 02:48:05,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 02:48:05,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 02:48:05,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 02:48:05,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 02:48:05,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 02:48:05,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 02:48:05,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:48:05,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:48:05,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:48:05,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:48:05,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:48:05,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:48:05,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:48:05,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:48:05,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:48:05,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:48:05,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:48:05,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:48:05,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:48:05,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:48:05,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:48:05,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:48:05,441 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:48:05,463 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:48:05,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:48:05,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:48:05,468 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:48:05,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:48:05,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:48:05,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:48:05,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:48:05,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:48:05,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:48:05,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:48:05,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:48:05,471 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:48:05,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:48:05,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:48:05,471 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:48:05,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:48:05,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:48:05,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:48:05,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:48:05,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:48:05,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:48:05,473 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:48:05,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:48:05,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:48:05,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:48:05,926 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:48:05,927 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:48:05,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-24 02:48:06,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fffaec705/455a7969a71449fa9f729bc2f412b846/FLAGc5f6c2da8 [2020-10-24 02:48:06,827 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:48:06,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-24 02:48:06,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fffaec705/455a7969a71449fa9f729bc2f412b846/FLAGc5f6c2da8 [2020-10-24 02:48:06,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fffaec705/455a7969a71449fa9f729bc2f412b846 [2020-10-24 02:48:06,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:48:06,973 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:48:06,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:48:06,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:48:06,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:48:06,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:48:06" (1/1) ... [2020-10-24 02:48:06,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f70646c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:48:06, skipping insertion in model container [2020-10-24 02:48:06,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:48:06" (1/1) ... [2020-10-24 02:48:07,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:48:07,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:48:08,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:48:08,708 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:48:09,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:48:09,520 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:48:09,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:48:09 WrapperNode [2020-10-24 02:48:09,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:48:09,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:48:09,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:48:09,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:48:09,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:48:09" (1/1) ... [2020-10-24 02:48:09,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:48:09" (1/1) ... [2020-10-24 02:48:09,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:48:09" (1/1) ... [2020-10-24 02:48:09,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:48:09" (1/1) ... [2020-10-24 02:48:09,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:48:09" (1/1) ... [2020-10-24 02:48:09,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:48:09" (1/1) ... [2020-10-24 02:48:09,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:48:09" (1/1) ... [2020-10-24 02:48:09,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:48:09,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:48:09,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:48:09,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:48:09,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:48:09" (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 [2020-10-24 02:48:09,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:48:09,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:48:09,835 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:48:09,835 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:48:09,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:48:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:48:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:48:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:48:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:48:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-24 02:48:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-24 02:48:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-24 02:48:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-24 02:48:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:48:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-24 02:48:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-24 02:48:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-24 02:48:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-24 02:48:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-24 02:48:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-24 02:48:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-24 02:48:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-24 02:48:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:48:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:48:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:48:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:48:09,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:48:09,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:48:09,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:48:14,234 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:48:14,235 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-24 02:48:14,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:48:14 BoogieIcfgContainer [2020-10-24 02:48:14,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:48:14,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:48:14,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:48:14,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:48:14,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:48:06" (1/3) ... [2020-10-24 02:48:14,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530f26c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:48:14, skipping insertion in model container [2020-10-24 02:48:14,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:48:09" (2/3) ... [2020-10-24 02:48:14,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530f26c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:48:14, skipping insertion in model container [2020-10-24 02:48:14,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:48:14" (3/3) ... [2020-10-24 02:48:14,253 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-24 02:48:14,265 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:48:14,271 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:48:14,284 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:48:14,316 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:48:14,316 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:48:14,316 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:48:14,316 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:48:14,317 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:48:14,317 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:48:14,317 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:48:14,317 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:48:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states. [2020-10-24 02:48:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 945 [2020-10-24 02:48:14,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:48:14,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:48:14,464 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:48:14,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:48:14,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1592668807, now seen corresponding path program 1 times [2020-10-24 02:48:14,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:48:14,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991463225] [2020-10-24 02:48:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:48:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:48:16,825 WARN L193 SmtUtils]: Spent 733.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-24 02:48:16,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:48:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:48:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:48:17,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991463225] [2020-10-24 02:48:17,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:48:17,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:48:17,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140977989] [2020-10-24 02:48:17,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:48:17,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:48:17,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:48:17,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:48:17,886 INFO L87 Difference]: Start difference. First operand 3026 states. Second operand 4 states. [2020-10-24 02:48:31,629 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-24 02:48:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:48:33,726 INFO L93 Difference]: Finished difference Result 4884 states and 6272 transitions. [2020-10-24 02:48:33,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:48:33,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 944 [2020-10-24 02:48:33,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:48:33,785 INFO L225 Difference]: With dead ends: 4884 [2020-10-24 02:48:33,786 INFO L226 Difference]: Without dead ends: 3674 [2020-10-24 02:48:33,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:48:33,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2020-10-24 02:48:34,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3657. [2020-10-24 02:48:34,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3657 states. [2020-10-24 02:48:34,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 4455 transitions. [2020-10-24 02:48:34,072 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 4455 transitions. Word has length 944 [2020-10-24 02:48:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:48:34,077 INFO L481 AbstractCegarLoop]: Abstraction has 3657 states and 4455 transitions. [2020-10-24 02:48:34,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:48:34,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 4455 transitions. [2020-10-24 02:48:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 945 [2020-10-24 02:48:34,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:48:34,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:48:34,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:48:34,122 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:48:34,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:48:34,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1926781461, now seen corresponding path program 1 times [2020-10-24 02:48:34,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:48:34,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174512532] [2020-10-24 02:48:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:48:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:48:35,919 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-24 02:48:35,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:48:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:48:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:48:36,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174512532] [2020-10-24 02:48:36,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:48:36,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:48:36,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392654449] [2020-10-24 02:48:36,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:48:36,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:48:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:48:36,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:48:36,667 INFO L87 Difference]: Start difference. First operand 3657 states and 4455 transitions. Second operand 5 states. [2020-10-24 02:48:56,100 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-24 02:48:59,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:48:59,442 INFO L93 Difference]: Finished difference Result 10237 states and 12584 transitions. [2020-10-24 02:48:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:48:59,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 944 [2020-10-24 02:48:59,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:48:59,480 INFO L225 Difference]: With dead ends: 10237 [2020-10-24 02:48:59,480 INFO L226 Difference]: Without dead ends: 6901 [2020-10-24 02:48:59,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:48:59,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2020-10-24 02:48:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 6348. [2020-10-24 02:48:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6348 states. [2020-10-24 02:48:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 7849 transitions. [2020-10-24 02:48:59,876 INFO L78 Accepts]: Start accepts. Automaton has 6348 states and 7849 transitions. Word has length 944 [2020-10-24 02:48:59,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:48:59,878 INFO L481 AbstractCegarLoop]: Abstraction has 6348 states and 7849 transitions. [2020-10-24 02:48:59,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:48:59,878 INFO L276 IsEmpty]: Start isEmpty. Operand 6348 states and 7849 transitions. [2020-10-24 02:48:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 947 [2020-10-24 02:48:59,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:48:59,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:48:59,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:48:59,900 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:48:59,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:48:59,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1384904271, now seen corresponding path program 1 times [2020-10-24 02:48:59,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:48:59,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104768306] [2020-10-24 02:48:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:48:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:49:01,023 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-24 02:49:01,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:49:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:49:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:49:01,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104768306] [2020-10-24 02:49:01,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:49:01,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:49:01,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074169314] [2020-10-24 02:49:01,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:49:01,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:49:01,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:49:01,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:49:01,603 INFO L87 Difference]: Start difference. First operand 6348 states and 7849 transitions. Second operand 4 states. [2020-10-24 02:49:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:49:25,458 INFO L93 Difference]: Finished difference Result 18368 states and 22846 transitions. [2020-10-24 02:49:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:49:25,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 946 [2020-10-24 02:49:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:49:25,511 INFO L225 Difference]: With dead ends: 18368 [2020-10-24 02:49:25,511 INFO L226 Difference]: Without dead ends: 12358 [2020-10-24 02:49:25,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:49:25,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12358 states. [2020-10-24 02:49:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12358 to 6364. [2020-10-24 02:49:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6364 states. [2020-10-24 02:49:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6364 states to 6364 states and 7871 transitions. [2020-10-24 02:49:26,073 INFO L78 Accepts]: Start accepts. Automaton has 6364 states and 7871 transitions. Word has length 946 [2020-10-24 02:49:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:49:26,074 INFO L481 AbstractCegarLoop]: Abstraction has 6364 states and 7871 transitions. [2020-10-24 02:49:26,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:49:26,074 INFO L276 IsEmpty]: Start isEmpty. Operand 6364 states and 7871 transitions. [2020-10-24 02:49:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 947 [2020-10-24 02:49:26,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:49:26,105 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:49:26,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:49:26,105 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:49:26,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:49:26,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1400473288, now seen corresponding path program 1 times [2020-10-24 02:49:26,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:49:26,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035600269] [2020-10-24 02:49:26,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:49:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:49:27,284 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-24 02:49:27,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:49:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:49:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:49:28,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035600269] [2020-10-24 02:49:28,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:49:28,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:49:28,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101131183] [2020-10-24 02:49:28,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:49:28,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:49:28,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:49:28,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:49:28,141 INFO L87 Difference]: Start difference. First operand 6364 states and 7871 transitions. Second operand 4 states. [2020-10-24 02:49:49,779 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-24 02:49:53,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:49:53,282 INFO L93 Difference]: Finished difference Result 18031 states and 22375 transitions. [2020-10-24 02:49:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:49:53,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 946 [2020-10-24 02:49:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:49:53,328 INFO L225 Difference]: With dead ends: 18031 [2020-10-24 02:49:53,328 INFO L226 Difference]: Without dead ends: 12210 [2020-10-24 02:49:53,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:49:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12210 states. [2020-10-24 02:49:54,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12210 to 11657. [2020-10-24 02:49:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11657 states. [2020-10-24 02:49:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11657 states to 11657 states and 14526 transitions. [2020-10-24 02:49:54,309 INFO L78 Accepts]: Start accepts. Automaton has 11657 states and 14526 transitions. Word has length 946 [2020-10-24 02:49:54,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:49:54,311 INFO L481 AbstractCegarLoop]: Abstraction has 11657 states and 14526 transitions. [2020-10-24 02:49:54,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:49:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand 11657 states and 14526 transitions. [2020-10-24 02:49:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2020-10-24 02:49:54,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:49:54,343 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:49:54,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:49:54,343 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:49:54,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:49:54,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1928011963, now seen corresponding path program 1 times [2020-10-24 02:49:54,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:49:54,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317950432] [2020-10-24 02:49:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:49:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:49:55,428 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-24 02:49:55,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:49:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:49:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:49:55,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317950432] [2020-10-24 02:49:55,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:49:55,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:49:55,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080727453] [2020-10-24 02:49:55,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:49:55,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:49:55,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:49:55,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:49:55,953 INFO L87 Difference]: Start difference. First operand 11657 states and 14526 transitions. Second operand 4 states. [2020-10-24 02:50:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:50:21,533 INFO L93 Difference]: Finished difference Result 34185 states and 42719 transitions. [2020-10-24 02:50:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:50:21,535 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 947 [2020-10-24 02:50:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:50:21,581 INFO L225 Difference]: With dead ends: 34185 [2020-10-24 02:50:21,582 INFO L226 Difference]: Without dead ends: 22919 [2020-10-24 02:50:21,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:50:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22919 states. [2020-10-24 02:50:22,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22919 to 11677. [2020-10-24 02:50:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11677 states. [2020-10-24 02:50:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11677 states to 11677 states and 14549 transitions. [2020-10-24 02:50:23,007 INFO L78 Accepts]: Start accepts. Automaton has 11677 states and 14549 transitions. Word has length 947 [2020-10-24 02:50:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:50:23,008 INFO L481 AbstractCegarLoop]: Abstraction has 11677 states and 14549 transitions. [2020-10-24 02:50:23,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:50:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand 11677 states and 14549 transitions. [2020-10-24 02:50:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 949 [2020-10-24 02:50:23,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:50:23,044 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:50:23,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:50:23,045 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:50:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:50:23,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1637936988, now seen corresponding path program 1 times [2020-10-24 02:50:23,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:50:23,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379536154] [2020-10-24 02:50:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:50:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:24,245 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-24 02:50:24,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:50:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:50:25,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379536154] [2020-10-24 02:50:25,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:50:25,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:50:25,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025853786] [2020-10-24 02:50:25,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:50:25,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:50:25,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:50:25,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:50:25,124 INFO L87 Difference]: Start difference. First operand 11677 states and 14549 transitions. Second operand 4 states. [2020-10-24 02:50:47,361 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-24 02:50:51,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:50:51,032 INFO L93 Difference]: Finished difference Result 32336 states and 40310 transitions. [2020-10-24 02:50:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:50:51,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 948 [2020-10-24 02:50:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:50:51,073 INFO L225 Difference]: With dead ends: 32336 [2020-10-24 02:50:51,073 INFO L226 Difference]: Without dead ends: 21369 [2020-10-24 02:50:51,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:50:51,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21369 states. [2020-10-24 02:50:52,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21369 to 20816. [2020-10-24 02:50:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20816 states. [2020-10-24 02:50:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20816 states to 20816 states and 25980 transitions. [2020-10-24 02:50:52,713 INFO L78 Accepts]: Start accepts. Automaton has 20816 states and 25980 transitions. Word has length 948 [2020-10-24 02:50:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:50:52,714 INFO L481 AbstractCegarLoop]: Abstraction has 20816 states and 25980 transitions. [2020-10-24 02:50:52,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:50:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 20816 states and 25980 transitions. [2020-10-24 02:50:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 949 [2020-10-24 02:50:52,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:50:52,754 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:50:52,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:50:52,754 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:50:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:50:52,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2055544796, now seen corresponding path program 1 times [2020-10-24 02:50:52,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:50:52,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353857211] [2020-10-24 02:50:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:50:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:54,118 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-24 02:50:54,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:50:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:50:54,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353857211] [2020-10-24 02:50:54,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:50:54,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:50:54,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689713781] [2020-10-24 02:50:54,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:50:54,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:50:54,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:50:54,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:50:54,927 INFO L87 Difference]: Start difference. First operand 20816 states and 25980 transitions. Second operand 5 states. [2020-10-24 02:51:17,546 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-24 02:51:21,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:51:21,942 INFO L93 Difference]: Finished difference Result 60590 states and 75642 transitions. [2020-10-24 02:51:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:51:21,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 948 [2020-10-24 02:51:21,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:51:22,017 INFO L225 Difference]: With dead ends: 60590 [2020-10-24 02:51:22,017 INFO L226 Difference]: Without dead ends: 40157 [2020-10-24 02:51:22,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:51:22,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40157 states. [2020-10-24 02:51:25,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40157 to 39620. [2020-10-24 02:51:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39620 states. [2020-10-24 02:51:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39620 states to 39620 states and 49349 transitions. [2020-10-24 02:51:25,728 INFO L78 Accepts]: Start accepts. Automaton has 39620 states and 49349 transitions. Word has length 948 [2020-10-24 02:51:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:51:25,728 INFO L481 AbstractCegarLoop]: Abstraction has 39620 states and 49349 transitions. [2020-10-24 02:51:25,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:51:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 39620 states and 49349 transitions. [2020-10-24 02:51:25,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2020-10-24 02:51:25,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:51:25,776 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:51:25,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:51:25,776 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:51:25,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:51:25,777 INFO L82 PathProgramCache]: Analyzing trace with hash 932156817, now seen corresponding path program 1 times [2020-10-24 02:51:25,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:51:25,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931264862] [2020-10-24 02:51:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:51:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:51:26,900 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-24 02:51:26,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:51:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:51:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:51:28,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931264862] [2020-10-24 02:51:28,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:51:28,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:51:28,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672655556] [2020-10-24 02:51:28,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:51:28,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:51:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:51:28,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:51:28,008 INFO L87 Difference]: Start difference. First operand 39620 states and 49349 transitions. Second operand 4 states. [2020-10-24 02:51:55,389 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 357 [2020-10-24 02:52:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:52:00,449 INFO L93 Difference]: Finished difference Result 115622 states and 143895 transitions. [2020-10-24 02:52:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:52:00,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 950 [2020-10-24 02:52:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:52:00,631 INFO L225 Difference]: With dead ends: 115622 [2020-10-24 02:52:00,632 INFO L226 Difference]: Without dead ends: 77194 [2020-10-24 02:52:00,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:52:00,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77194 states. [2020-10-24 02:52:07,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77194 to 76669. [2020-10-24 02:52:07,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76669 states. [2020-10-24 02:52:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76669 states to 76669 states and 95277 transitions. [2020-10-24 02:52:07,574 INFO L78 Accepts]: Start accepts. Automaton has 76669 states and 95277 transitions. Word has length 950 [2020-10-24 02:52:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:52:07,574 INFO L481 AbstractCegarLoop]: Abstraction has 76669 states and 95277 transitions. [2020-10-24 02:52:07,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:52:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 76669 states and 95277 transitions. [2020-10-24 02:52:07,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2020-10-24 02:52:07,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:52:07,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:52:07,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:52:07,652 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:52:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:52:07,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1964111377, now seen corresponding path program 1 times [2020-10-24 02:52:07,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:52:07,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770267098] [2020-10-24 02:52:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:52:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:52:09,272 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-24 02:52:09,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:52:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:52:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:52:10,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770267098] [2020-10-24 02:52:10,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:52:10,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:52:10,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368763905] [2020-10-24 02:52:10,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:52:10,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:52:10,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:52:10,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:52:10,243 INFO L87 Difference]: Start difference. First operand 76669 states and 95277 transitions. Second operand 5 states. [2020-10-24 02:52:41,899 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-24 02:52:49,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:52:49,023 INFO L93 Difference]: Finished difference Result 225378 states and 279899 transitions. [2020-10-24 02:52:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:52:49,025 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 950 [2020-10-24 02:52:49,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:52:49,297 INFO L225 Difference]: With dead ends: 225378 [2020-10-24 02:52:49,297 INFO L226 Difference]: Without dead ends: 149260 [2020-10-24 02:52:49,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:52:49,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149260 states. [2020-10-24 02:53:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149260 to 148790. [2020-10-24 02:53:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148790 states. [2020-10-24 02:53:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148790 states to 148790 states and 184148 transitions. [2020-10-24 02:53:04,860 INFO L78 Accepts]: Start accepts. Automaton has 148790 states and 184148 transitions. Word has length 950 [2020-10-24 02:53:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:53:04,860 INFO L481 AbstractCegarLoop]: Abstraction has 148790 states and 184148 transitions. [2020-10-24 02:53:04,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:53:04,861 INFO L276 IsEmpty]: Start isEmpty. Operand 148790 states and 184148 transitions. [2020-10-24 02:53:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2020-10-24 02:53:04,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:53:04,988 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:53:04,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:53:04,988 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:53:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:53:04,989 INFO L82 PathProgramCache]: Analyzing trace with hash -343169231, now seen corresponding path program 1 times [2020-10-24 02:53:04,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:53:04,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208407087] [2020-10-24 02:53:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:53:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:53:06,849 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-24 02:53:06,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:53:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:53:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:53:07,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208407087] [2020-10-24 02:53:07,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:53:07,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:53:07,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120398853] [2020-10-24 02:53:07,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:53:07,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:53:07,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:53:07,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:53:07,588 INFO L87 Difference]: Start difference. First operand 148790 states and 184148 transitions. Second operand 5 states. [2020-10-24 02:53:53,735 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-24 02:54:05,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:54:05,010 INFO L93 Difference]: Finished difference Result 439320 states and 543268 transitions. [2020-10-24 02:54:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:54:05,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 950 [2020-10-24 02:54:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:54:05,462 INFO L225 Difference]: With dead ends: 439320 [2020-10-24 02:54:05,462 INFO L226 Difference]: Without dead ends: 291292 [2020-10-24 02:54:05,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:54:05,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291292 states. [2020-10-24 02:54:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291292 to 290586. [2020-10-24 02:54:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290586 states. [2020-10-24 02:54:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290586 states to 290586 states and 358201 transitions. [2020-10-24 02:54:37,210 INFO L78 Accepts]: Start accepts. Automaton has 290586 states and 358201 transitions. Word has length 950 [2020-10-24 02:54:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:54:37,211 INFO L481 AbstractCegarLoop]: Abstraction has 290586 states and 358201 transitions. [2020-10-24 02:54:37,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:54:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 290586 states and 358201 transitions. [2020-10-24 02:54:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 953 [2020-10-24 02:54:37,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:54:37,929 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:54:37,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:54:37,929 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:54:37,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:54:37,930 INFO L82 PathProgramCache]: Analyzing trace with hash -270884108, now seen corresponding path program 1 times [2020-10-24 02:54:37,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:54:37,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725474982] [2020-10-24 02:54:37,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:54:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:54:39,282 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-24 02:54:39,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:54:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:54:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:54:40,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725474982] [2020-10-24 02:54:40,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:54:40,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:54:40,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942012917] [2020-10-24 02:54:40,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:54:40,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:54:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:54:40,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:54:40,047 INFO L87 Difference]: Start difference. First operand 290586 states and 358201 transitions. Second operand 4 states. [2020-10-24 02:55:53,707 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 357 [2020-10-24 02:56:15,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:56:15,648 INFO L93 Difference]: Finished difference Result 855743 states and 1053265 transitions. [2020-10-24 02:56:15,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:56:15,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 952 [2020-10-24 02:56:15,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:56:16,654 INFO L225 Difference]: With dead ends: 855743 [2020-10-24 02:56:16,654 INFO L226 Difference]: Without dead ends: 569701 [2020-10-24 02:56:17,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:56:17,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569701 states.