/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.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:50:14,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:50:14,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:50:14,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 02:50:14,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 02:50:14,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 02:50:14,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 02:50:14,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 02:50:14,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 02:50:14,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 02:50:14,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 02:50:14,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 02:50:14,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:50:14,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:50:14,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:50:14,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:50:14,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:50:14,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:50:14,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:50:14,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:50:14,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:50:14,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:50:14,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:50:14,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:50:14,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:50:14,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:50:14,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:50:14,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:50:14,966 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 02:50:14,988 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:50:14,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:50:14,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:50:14,994 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:50:14,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:50:14,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:50:14,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:50:14,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:50:14,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:50:14,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:50:14,996 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:50:14,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:50:14,997 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:50:14,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:50:14,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:50:14,998 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:50:14,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:50:14,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:50:14,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:50:14,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:50:14,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:50:14,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:50:15,000 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:50:15,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:50:15,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:50:15,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:50:15,455 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:50:15,456 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:50:15,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-24 02:50:15,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ad2e058/d819c09d72844baf82ee3b705100015c/FLAGa03acccf4 [2020-10-24 02:50:16,341 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:50:16,344 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-24 02:50:16,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ad2e058/d819c09d72844baf82ee3b705100015c/FLAGa03acccf4 [2020-10-24 02:50:16,471 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ad2e058/d819c09d72844baf82ee3b705100015c [2020-10-24 02:50:16,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:50:16,480 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:50:16,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:50:16,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:50:16,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:50:16,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:50:16" (1/1) ... [2020-10-24 02:50:16,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c18fe52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:50:16, skipping insertion in model container [2020-10-24 02:50:16,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:50:16" (1/1) ... [2020-10-24 02:50:16,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:50:16,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:50:17,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:50:17,721 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:50:18,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:50:18,220 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:50:18,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:50:18 WrapperNode [2020-10-24 02:50:18,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:50:18,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:50:18,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:50:18,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:50:18,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:50:18" (1/1) ... [2020-10-24 02:50:18,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:50:18" (1/1) ... [2020-10-24 02:50:18,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:50:18" (1/1) ... [2020-10-24 02:50:18,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:50:18" (1/1) ... [2020-10-24 02:50:18,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:50:18" (1/1) ... [2020-10-24 02:50:18,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:50:18" (1/1) ... [2020-10-24 02:50:18,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:50:18" (1/1) ... [2020-10-24 02:50:18,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:50:18,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:50:18,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:50:18,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:50:18,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:50:18" (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 02:50:18,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:50:18,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:50:18,552 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:50:18,552 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:50:18,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:50:18,552 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:50:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:50:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:50:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:50:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-24 02:50:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-24 02:50:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-24 02:50:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:50:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-24 02:50:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-24 02:50:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-24 02:50:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-24 02:50:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-24 02:50:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-24 02:50:18,557 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-24 02:50:18,557 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-24 02:50:18,557 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:50:18,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:50:18,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:50:18,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:50:18,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:50:18,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:50:18,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:50:22,142 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:50:22,143 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-24 02:50:22,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:50:22 BoogieIcfgContainer [2020-10-24 02:50:22,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:50:22,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:50:22,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:50:22,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:50:22,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:50:16" (1/3) ... [2020-10-24 02:50:22,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8458b53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:50:22, skipping insertion in model container [2020-10-24 02:50:22,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:50:18" (2/3) ... [2020-10-24 02:50:22,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8458b53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:50:22, skipping insertion in model container [2020-10-24 02:50:22,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:50:22" (3/3) ... [2020-10-24 02:50:22,161 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-24 02:50:22,174 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:50:22,184 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:50:22,203 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:50:22,224 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:50:22,225 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:50:22,225 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:50:22,225 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:50:22,225 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:50:22,225 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:50:22,225 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:50:22,225 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:50:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states. [2020-10-24 02:50:22,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 942 [2020-10-24 02:50:22,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:50:22,374 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] [2020-10-24 02:50:22,374 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:50:22,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:50:22,382 INFO L82 PathProgramCache]: Analyzing trace with hash -921074471, now seen corresponding path program 1 times [2020-10-24 02:50:22,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:50:22,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450783981] [2020-10-24 02:50:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:50:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:24,918 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-24 02:50:24,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:50:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:26,114 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 02:50:26,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450783981] [2020-10-24 02:50:26,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:50:26,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:50:26,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722609739] [2020-10-24 02:50:26,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:50:26,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:50:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:50:26,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:50:26,151 INFO L87 Difference]: Start difference. First operand 2033 states. Second operand 4 states. [2020-10-24 02:50:35,892 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-24 02:50:37,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:50:37,354 INFO L93 Difference]: Finished difference Result 3542 states and 4658 transitions. [2020-10-24 02:50:37,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:50:37,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 941 [2020-10-24 02:50:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:50:37,397 INFO L225 Difference]: With dead ends: 3542 [2020-10-24 02:50:37,397 INFO L226 Difference]: Without dead ends: 2865 [2020-10-24 02:50:37,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:50:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2020-10-24 02:50:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2851. [2020-10-24 02:50:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2851 states. [2020-10-24 02:50:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 3568 transitions. [2020-10-24 02:50:37,650 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 3568 transitions. Word has length 941 [2020-10-24 02:50:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:50:37,655 INFO L481 AbstractCegarLoop]: Abstraction has 2851 states and 3568 transitions. [2020-10-24 02:50:37,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:50:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 3568 transitions. [2020-10-24 02:50:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 942 [2020-10-24 02:50:37,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:50:37,697 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] [2020-10-24 02:50:37,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:50:37,698 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:50:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:50:37,700 INFO L82 PathProgramCache]: Analyzing trace with hash 798684281, now seen corresponding path program 1 times [2020-10-24 02:50:37,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:50:37,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148392288] [2020-10-24 02:50:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:50:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:39,469 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-24 02:50:39,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:50:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:40,122 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 02:50:40,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148392288] [2020-10-24 02:50:40,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:50:40,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:50:40,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95001585] [2020-10-24 02:50:40,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:50:40,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:50:40,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:50:40,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:50:40,127 INFO L87 Difference]: Start difference. First operand 2851 states and 3568 transitions. Second operand 5 states. [2020-10-24 02:50:52,219 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-24 02:50:55,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:50:55,085 INFO L93 Difference]: Finished difference Result 7845 states and 9951 transitions. [2020-10-24 02:50:55,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:50:55,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 941 [2020-10-24 02:50:55,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:50:55,117 INFO L225 Difference]: With dead ends: 7845 [2020-10-24 02:50:55,117 INFO L226 Difference]: Without dead ends: 5306 [2020-10-24 02:50:55,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:50:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5306 states. [2020-10-24 02:50:55,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5306 to 5303. [2020-10-24 02:50:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5303 states. [2020-10-24 02:50:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5303 states to 5303 states and 6681 transitions. [2020-10-24 02:50:55,440 INFO L78 Accepts]: Start accepts. Automaton has 5303 states and 6681 transitions. Word has length 941 [2020-10-24 02:50:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:50:55,442 INFO L481 AbstractCegarLoop]: Abstraction has 5303 states and 6681 transitions. [2020-10-24 02:50:55,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:50:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5303 states and 6681 transitions. [2020-10-24 02:50:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 944 [2020-10-24 02:50:55,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:50:55,463 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] [2020-10-24 02:50:55,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:50:55,465 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:50:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:50:55,469 INFO L82 PathProgramCache]: Analyzing trace with hash 955281494, now seen corresponding path program 1 times [2020-10-24 02:50:55,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:50:55,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299765183] [2020-10-24 02:50:55,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:50:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:56,510 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-24 02:50:56,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:50:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:57,183 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 02:50:57,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299765183] [2020-10-24 02:50:57,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:50:57,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:50:57,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377987674] [2020-10-24 02:50:57,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:50:57,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:50:57,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:50:57,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:50:57,192 INFO L87 Difference]: Start difference. First operand 5303 states and 6681 transitions. Second operand 4 states. [2020-10-24 02:51:11,361 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-24 02:51:14,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:51:14,100 INFO L93 Difference]: Finished difference Result 14908 states and 18878 transitions. [2020-10-24 02:51:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:51:14,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 943 [2020-10-24 02:51:14,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:51:14,148 INFO L225 Difference]: With dead ends: 14908 [2020-10-24 02:51:14,148 INFO L226 Difference]: Without dead ends: 10123 [2020-10-24 02:51:14,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:51:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10123 states. [2020-10-24 02:51:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10123 to 10120. [2020-10-24 02:51:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-10-24 02:51:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 12777 transitions. [2020-10-24 02:51:14,709 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 12777 transitions. Word has length 943 [2020-10-24 02:51:14,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:51:14,710 INFO L481 AbstractCegarLoop]: Abstraction has 10120 states and 12777 transitions. [2020-10-24 02:51:14,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:51:14,711 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 12777 transitions. [2020-10-24 02:51:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 944 [2020-10-24 02:51:14,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:51:14,741 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] [2020-10-24 02:51:14,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:51:14,741 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:51:14,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:51:14,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1089642369, now seen corresponding path program 1 times [2020-10-24 02:51:14,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:51:14,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814138631] [2020-10-24 02:51:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:51:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:51:15,735 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-24 02:51:15,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:51:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:51:16,277 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 02:51:16,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814138631] [2020-10-24 02:51:16,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:51:16,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:51:16,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848002417] [2020-10-24 02:51:16,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:51:16,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:51:16,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:51:16,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:51:16,281 INFO L87 Difference]: Start difference. First operand 10120 states and 12777 transitions. Second operand 4 states. [2020-10-24 02:51:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:51:33,209 INFO L93 Difference]: Finished difference Result 29644 states and 37567 transitions. [2020-10-24 02:51:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:51:33,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 943 [2020-10-24 02:51:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:51:33,297 INFO L225 Difference]: With dead ends: 29644 [2020-10-24 02:51:33,297 INFO L226 Difference]: Without dead ends: 19883 [2020-10-24 02:51:33,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:51:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19883 states. [2020-10-24 02:51:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19883 to 10142. [2020-10-24 02:51:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10142 states. [2020-10-24 02:51:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10142 states to 10142 states and 12808 transitions. [2020-10-24 02:51:34,282 INFO L78 Accepts]: Start accepts. Automaton has 10142 states and 12808 transitions. Word has length 943 [2020-10-24 02:51:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:51:34,283 INFO L481 AbstractCegarLoop]: Abstraction has 10142 states and 12808 transitions. [2020-10-24 02:51:34,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:51:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 10142 states and 12808 transitions. [2020-10-24 02:51:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 945 [2020-10-24 02:51:34,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:51:34,318 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 02:51:34,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:51:34,318 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:51:34,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:51:34,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1789997313, now seen corresponding path program 1 times [2020-10-24 02:51:34,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:51:34,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928402848] [2020-10-24 02:51:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:51:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:51:35,294 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-24 02:51:35,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:51:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:51:35,783 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 02:51:35,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928402848] [2020-10-24 02:51:35,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:51:35,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:51:35,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608701043] [2020-10-24 02:51:35,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:51:35,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:51:35,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:51:35,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:51:35,786 INFO L87 Difference]: Start difference. First operand 10142 states and 12808 transitions. Second operand 4 states. [2020-10-24 02:51:53,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:51:53,077 INFO L93 Difference]: Finished difference Result 29658 states and 37583 transitions. [2020-10-24 02:51:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:51:53,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 944 [2020-10-24 02:51:53,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:51:53,119 INFO L225 Difference]: With dead ends: 29658 [2020-10-24 02:51:53,119 INFO L226 Difference]: Without dead ends: 19898 [2020-10-24 02:51:53,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:51:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19898 states. [2020-10-24 02:51:53,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19898 to 10162. [2020-10-24 02:51:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10162 states. [2020-10-24 02:51:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10162 states to 10162 states and 12831 transitions. [2020-10-24 02:51:53,991 INFO L78 Accepts]: Start accepts. Automaton has 10162 states and 12831 transitions. Word has length 944 [2020-10-24 02:51:53,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:51:53,992 INFO L481 AbstractCegarLoop]: Abstraction has 10162 states and 12831 transitions. [2020-10-24 02:51:53,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:51:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 10162 states and 12831 transitions. [2020-10-24 02:51:54,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 946 [2020-10-24 02:51:54,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:51:54,024 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] [2020-10-24 02:51:54,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:51:54,024 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:51:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:51:54,025 INFO L82 PathProgramCache]: Analyzing trace with hash -152493390, now seen corresponding path program 1 times [2020-10-24 02:51:54,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:51:54,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807514037] [2020-10-24 02:51:54,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:51:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:51:55,054 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-24 02:51:55,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:51:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:51:55,816 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 02:51:55,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807514037] [2020-10-24 02:51:55,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:51:55,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:51:55,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166668880] [2020-10-24 02:51:55,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:51:55,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:51:55,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:51:55,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:51:55,820 INFO L87 Difference]: Start difference. First operand 10162 states and 12831 transitions. Second operand 4 states. [2020-10-24 02:52:11,207 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-24 02:52:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:52:14,276 INFO L93 Difference]: Finished difference Result 28061 states and 35469 transitions. [2020-10-24 02:52:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:52:14,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 945 [2020-10-24 02:52:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:52:14,312 INFO L225 Difference]: With dead ends: 28061 [2020-10-24 02:52:14,313 INFO L226 Difference]: Without dead ends: 18600 [2020-10-24 02:52:14,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:52:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18600 states. [2020-10-24 02:52:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18600 to 18597. [2020-10-24 02:52:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18597 states. [2020-10-24 02:52:15,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18597 states to 18597 states and 23441 transitions. [2020-10-24 02:52:15,623 INFO L78 Accepts]: Start accepts. Automaton has 18597 states and 23441 transitions. Word has length 945 [2020-10-24 02:52:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:52:15,624 INFO L481 AbstractCegarLoop]: Abstraction has 18597 states and 23441 transitions. [2020-10-24 02:52:15,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:52:15,624 INFO L276 IsEmpty]: Start isEmpty. Operand 18597 states and 23441 transitions. [2020-10-24 02:52:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 946 [2020-10-24 02:52:15,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:52:15,662 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] [2020-10-24 02:52:15,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:52:15,662 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:52:15,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:52:15,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2060145202, now seen corresponding path program 1 times [2020-10-24 02:52:15,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:52:15,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350340073] [2020-10-24 02:52:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:52:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:52:17,092 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-24 02:52:17,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:52:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:52:17,848 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 02:52:17,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350340073] [2020-10-24 02:52:17,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:52:17,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:52:17,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728203050] [2020-10-24 02:52:17,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:52:17,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:52:17,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:52:17,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:52:17,851 INFO L87 Difference]: Start difference. First operand 18597 states and 23441 transitions. Second operand 5 states. [2020-10-24 02:52:32,306 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-24 02:52:35,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:52:35,875 INFO L93 Difference]: Finished difference Result 53991 states and 68091 transitions. [2020-10-24 02:52:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:52:35,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 945 [2020-10-24 02:52:35,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:52:35,940 INFO L225 Difference]: With dead ends: 53991 [2020-10-24 02:52:35,941 INFO L226 Difference]: Without dead ends: 35768 [2020-10-24 02:52:35,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:52:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35768 states. [2020-10-24 02:52:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35768 to 35765. [2020-10-24 02:52:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35765 states. [2020-10-24 02:52:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35765 states to 35765 states and 44903 transitions. [2020-10-24 02:52:38,896 INFO L78 Accepts]: Start accepts. Automaton has 35765 states and 44903 transitions. Word has length 945 [2020-10-24 02:52:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:52:38,897 INFO L481 AbstractCegarLoop]: Abstraction has 35765 states and 44903 transitions. [2020-10-24 02:52:38,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:52:38,897 INFO L276 IsEmpty]: Start isEmpty. Operand 35765 states and 44903 transitions. [2020-10-24 02:52:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2020-10-24 02:52:38,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:52:38,959 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 02:52:38,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:52:38,960 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:52:38,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:52:38,960 INFO L82 PathProgramCache]: Analyzing trace with hash -434820481, now seen corresponding path program 1 times [2020-10-24 02:52:38,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:52:38,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869958474] [2020-10-24 02:52:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:52:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:52:40,310 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-24 02:52:40,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:52:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:52:41,187 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 02:52:41,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869958474] [2020-10-24 02:52:41,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:52:41,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:52:41,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7777671] [2020-10-24 02:52:41,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:52:41,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:52:41,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:52:41,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:52:41,194 INFO L87 Difference]: Start difference. First operand 35765 states and 44903 transitions. Second operand 5 states. [2020-10-24 02:52:58,541 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-24 02:53:02,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:53:02,819 INFO L93 Difference]: Finished difference Result 104731 states and 131479 transitions. [2020-10-24 02:53:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:53:02,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 947 [2020-10-24 02:53:02,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:53:02,920 INFO L225 Difference]: With dead ends: 104731 [2020-10-24 02:53:02,920 INFO L226 Difference]: Without dead ends: 69580 [2020-10-24 02:53:02,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:53:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69580 states. [2020-10-24 02:53:09,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69580 to 69577. [2020-10-24 02:53:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69577 states. [2020-10-24 02:53:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69577 states to 69577 states and 87022 transitions. [2020-10-24 02:53:09,407 INFO L78 Accepts]: Start accepts. Automaton has 69577 states and 87022 transitions. Word has length 947 [2020-10-24 02:53:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:53:09,408 INFO L481 AbstractCegarLoop]: Abstraction has 69577 states and 87022 transitions. [2020-10-24 02:53:09,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:53:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand 69577 states and 87022 transitions. [2020-10-24 02:53:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 950 [2020-10-24 02:53:09,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:53:09,479 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] [2020-10-24 02:53:09,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:53:09,480 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:53:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:53:09,480 INFO L82 PathProgramCache]: Analyzing trace with hash -848777863, now seen corresponding path program 1 times [2020-10-24 02:53:09,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:53:09,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184615041] [2020-10-24 02:53:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:53:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:53:10,842 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-24 02:53:10,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:53:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:53:11,490 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 02:53:11,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184615041] [2020-10-24 02:53:11,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:53:11,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:53:11,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699440112] [2020-10-24 02:53:11,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:53:11,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:53:11,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:53:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:53:11,496 INFO L87 Difference]: Start difference. First operand 69577 states and 87022 transitions. Second operand 4 states. [2020-10-24 02:53:41,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:53:41,759 INFO L93 Difference]: Finished difference Result 207241 states and 259261 transitions. [2020-10-24 02:53:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:53:41,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 949 [2020-10-24 02:53:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:53:41,937 INFO L225 Difference]: With dead ends: 207241 [2020-10-24 02:53:41,937 INFO L226 Difference]: Without dead ends: 138418 [2020-10-24 02:53:42,009 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 02:53:42,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138418 states. [2020-10-24 02:53:49,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138418 to 69737. [2020-10-24 02:53:49,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69737 states. [2020-10-24 02:53:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69737 states to 69737 states and 87242 transitions. [2020-10-24 02:53:49,140 INFO L78 Accepts]: Start accepts. Automaton has 69737 states and 87242 transitions. Word has length 949 [2020-10-24 02:53:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:53:49,141 INFO L481 AbstractCegarLoop]: Abstraction has 69737 states and 87242 transitions. [2020-10-24 02:53:49,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:53:49,141 INFO L276 IsEmpty]: Start isEmpty. Operand 69737 states and 87242 transitions. [2020-10-24 02:53:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 950 [2020-10-24 02:53:49,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:53:49,222 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] [2020-10-24 02:53:49,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:53:49,222 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:53:49,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:53:49,223 INFO L82 PathProgramCache]: Analyzing trace with hash -459857982, now seen corresponding path program 1 times [2020-10-24 02:53:49,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:53:49,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616649573] [2020-10-24 02:53:49,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:53:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:53:50,252 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-24 02:53:50,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:53:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:53:51,416 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 02:53:51,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616649573] [2020-10-24 02:53:51,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:53:51,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:53:51,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312017263] [2020-10-24 02:53:51,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:53:51,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:53:51,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:53:51,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:53:51,419 INFO L87 Difference]: Start difference. First operand 69737 states and 87242 transitions. Second operand 4 states. [2020-10-24 02:54:18,115 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-24 02:54:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:54:24,368 INFO L93 Difference]: Finished difference Result 203845 states and 254678 transitions. [2020-10-24 02:54:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:54:24,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 949 [2020-10-24 02:54:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:54:24,537 INFO L225 Difference]: With dead ends: 203845 [2020-10-24 02:54:24,537 INFO L226 Difference]: Without dead ends: 136088 [2020-10-24 02:54:24,613 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 02:54:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136088 states. [2020-10-24 02:54:38,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136088 to 136085. [2020-10-24 02:54:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136085 states. [2020-10-24 02:54:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136085 states to 136085 states and 169600 transitions. [2020-10-24 02:54:38,843 INFO L78 Accepts]: Start accepts. Automaton has 136085 states and 169600 transitions. Word has length 949 [2020-10-24 02:54:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:54:38,843 INFO L481 AbstractCegarLoop]: Abstraction has 136085 states and 169600 transitions. [2020-10-24 02:54:38,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:54:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 136085 states and 169600 transitions. [2020-10-24 02:54:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2020-10-24 02:54:38,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:54:38,969 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 02:54:38,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:54:38,969 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:54:38,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:54:38,970 INFO L82 PathProgramCache]: Analyzing trace with hash 282043469, now seen corresponding path program 1 times [2020-10-24 02:54:38,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:54:38,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400442250] [2020-10-24 02:54:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:54:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:54:40,562 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-24 02:54:40,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:54:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:54:41,275 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 02:54:41,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400442250] [2020-10-24 02:54:41,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:54:41,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:54:41,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995266057] [2020-10-24 02:54:41,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:54:41,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:54:41,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:54:41,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:54:41,278 INFO L87 Difference]: Start difference. First operand 136085 states and 169600 transitions. Second operand 4 states. [2020-10-24 02:55:30,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:55:30,029 INFO L93 Difference]: Finished difference Result 405609 states and 505341 transitions. [2020-10-24 02:55:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:55:30,030 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 950 [2020-10-24 02:55:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:55:30,424 INFO L225 Difference]: With dead ends: 405609 [2020-10-24 02:55:30,425 INFO L226 Difference]: Without dead ends: 270876 [2020-10-24 02:55:30,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:55:30,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270876 states. [2020-10-24 02:55:47,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270876 to 136263. [2020-10-24 02:55:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136263 states. [2020-10-24 02:55:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136263 states to 136263 states and 169802 transitions. [2020-10-24 02:55:47,606 INFO L78 Accepts]: Start accepts. Automaton has 136263 states and 169802 transitions. Word has length 950 [2020-10-24 02:55:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:55:47,606 INFO L481 AbstractCegarLoop]: Abstraction has 136263 states and 169802 transitions. [2020-10-24 02:55:47,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:55:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 136263 states and 169802 transitions. [2020-10-24 02:55:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 952 [2020-10-24 02:55:47,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:55:47,720 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] [2020-10-24 02:55:47,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:55:47,720 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:55:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:55:47,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1960845542, now seen corresponding path program 1 times [2020-10-24 02:55:47,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:55:47,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457461736] [2020-10-24 02:55:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:55:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:55:49,277 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-24 02:55:49,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:55:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:55:50,018 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 02:55:50,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457461736] [2020-10-24 02:55:50,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:55:50,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:55:50,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770406847] [2020-10-24 02:55:50,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:55:50,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:55:50,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:55:50,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:55:50,021 INFO L87 Difference]: Start difference. First operand 136263 states and 169802 transitions. Second operand 5 states. [2020-10-24 02:56:29,828 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-24 02:56:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:56:40,975 INFO L93 Difference]: Finished difference Result 399349 states and 496980 transitions. [2020-10-24 02:56:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:56:40,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 951 [2020-10-24 02:56:40,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:56:41,394 INFO L225 Difference]: With dead ends: 399349 [2020-10-24 02:56:41,394 INFO L226 Difference]: Without dead ends: 264134 [2020-10-24 02:56:41,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:56:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264134 states. [2020-10-24 02:57:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264134 to 264131. [2020-10-24 02:57:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264131 states. [2020-10-24 02:57:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264131 states to 264131 states and 327356 transitions. [2020-10-24 02:57:17,739 INFO L78 Accepts]: Start accepts. Automaton has 264131 states and 327356 transitions. Word has length 951 [2020-10-24 02:57:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:57:17,740 INFO L481 AbstractCegarLoop]: Abstraction has 264131 states and 327356 transitions. [2020-10-24 02:57:17,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:57:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand 264131 states and 327356 transitions. [2020-10-24 02:57:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 954 [2020-10-24 02:57:18,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:57:18,471 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, 1] [2020-10-24 02:57:18,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:57:18,471 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:57:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:57:18,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1445556729, now seen corresponding path program 1 times [2020-10-24 02:57:18,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:57:18,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994921323] [2020-10-24 02:57:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:57:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:57:19,870 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-24 02:57:19,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:57:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:57:20,571 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 02:57:20,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994921323] [2020-10-24 02:57:20,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:57:20,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:57:20,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457845990] [2020-10-24 02:57:20,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:57:20,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:57:20,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:57:20,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:57:20,573 INFO L87 Difference]: Start difference. First operand 264131 states and 327356 transitions. Second operand 5 states.