/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_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:43:27,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:43:27,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:43:28,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 02:43:28,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 02:43:28,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 02:43:28,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 02:43:28,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 02:43:28,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 02:43:28,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 02:43:28,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 02:43:28,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 02:43:28,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:43:28,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:43:28,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:43:28,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:43:28,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:43:28,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:43:28,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:43:28,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:43:28,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:43:28,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:43:28,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:43:28,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:43:28,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:43:28,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:43:28,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:43:28,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:43:28,145 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 02:43:28,166 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:43:28,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:43:28,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:43:28,173 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:43:28,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:43:28,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:43:28,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:43:28,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:43:28,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:43:28,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:43:28,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:43:28,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:43:28,176 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:43:28,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:43:28,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:43:28,177 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:43:28,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:43:28,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:43:28,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:43:28,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:43:28,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:43:28,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:43:28,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:43:28,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:43:28,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:43:28,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:43:28,711 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:43:28,712 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:43:28,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-24 02:43:28,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d54739bb7/8576cc841e694b6e98655fa5639a2058/FLAG0429cbcc2 [2020-10-24 02:43:29,635 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:43:29,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-24 02:43:29,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d54739bb7/8576cc841e694b6e98655fa5639a2058/FLAG0429cbcc2 [2020-10-24 02:43:29,842 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d54739bb7/8576cc841e694b6e98655fa5639a2058 [2020-10-24 02:43:29,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:43:29,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:43:29,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:43:29,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:43:29,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:43:29,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:43:29" (1/1) ... [2020-10-24 02:43:29,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d48e9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:43:29, skipping insertion in model container [2020-10-24 02:43:29,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:43:29" (1/1) ... [2020-10-24 02:43:29,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:43:29,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:43:30,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:43:30,600 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:43:30,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:43:30,996 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:43:30,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:43:30 WrapperNode [2020-10-24 02:43:30,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:43:30,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:43:30,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:43:30,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:43:31,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:43:30" (1/1) ... [2020-10-24 02:43:31,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:43:30" (1/1) ... [2020-10-24 02:43:31,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:43:30" (1/1) ... [2020-10-24 02:43:31,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:43:30" (1/1) ... [2020-10-24 02:43:31,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:43:30" (1/1) ... [2020-10-24 02:43:31,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:43:30" (1/1) ... [2020-10-24 02:43:31,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:43:30" (1/1) ... [2020-10-24 02:43:31,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:43:31,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:43:31,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:43:31,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:43:31,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:43:30" (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 02:43:31,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:43:31,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:43:31,248 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:43:31,249 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:43:31,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:43:31,249 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:43:31,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:43:31,250 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:43:31,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:43:31,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-24 02:43:31,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-24 02:43:31,251 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-24 02:43:31,251 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:43:31,251 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-24 02:43:31,252 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-24 02:43:31,252 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-24 02:43:31,253 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-24 02:43:31,253 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-24 02:43:31,253 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-24 02:43:31,254 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-24 02:43:31,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:43:31,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:43:31,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:43:31,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:43:31,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:43:31,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:43:31,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:43:33,676 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:43:33,677 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-24 02:43:33,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:43:33 BoogieIcfgContainer [2020-10-24 02:43:33,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:43:33,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:43:33,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:43:33,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:43:33,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:43:29" (1/3) ... [2020-10-24 02:43:33,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc1640f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:43:33, skipping insertion in model container [2020-10-24 02:43:33,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:43:30" (2/3) ... [2020-10-24 02:43:33,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc1640f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:43:33, skipping insertion in model container [2020-10-24 02:43:33,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:43:33" (3/3) ... [2020-10-24 02:43:33,703 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-24 02:43:33,716 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:43:33,723 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:43:33,738 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:43:33,769 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:43:33,770 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:43:33,770 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:43:33,770 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:43:33,770 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:43:33,770 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:43:33,771 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:43:33,771 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:43:33,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states. [2020-10-24 02:43:33,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-10-24 02:43:33,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:43:33,874 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] [2020-10-24 02:43:33,875 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:43:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:43:33,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1164331303, now seen corresponding path program 1 times [2020-10-24 02:43:33,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:43:33,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201292463] [2020-10-24 02:43:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:43:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:35,394 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-24 02:43:35,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:43:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:35,891 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 02:43:35,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201292463] [2020-10-24 02:43:35,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:43:35,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:43:35,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934363974] [2020-10-24 02:43:35,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:43:35,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:43:35,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:43:35,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:43:35,946 INFO L87 Difference]: Start difference. First operand 1134 states. Second operand 4 states. [2020-10-24 02:43:41,147 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-24 02:43:42,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:43:42,185 INFO L93 Difference]: Finished difference Result 1841 states and 2375 transitions. [2020-10-24 02:43:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:43:42,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 432 [2020-10-24 02:43:42,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:43:42,237 INFO L225 Difference]: With dead ends: 1841 [2020-10-24 02:43:42,237 INFO L226 Difference]: Without dead ends: 1309 [2020-10-24 02:43:42,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:43:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2020-10-24 02:43:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1301. [2020-10-24 02:43:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1301 states. [2020-10-24 02:43:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1554 transitions. [2020-10-24 02:43:42,448 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1554 transitions. Word has length 432 [2020-10-24 02:43:42,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:43:42,452 INFO L481 AbstractCegarLoop]: Abstraction has 1301 states and 1554 transitions. [2020-10-24 02:43:42,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:43:42,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1554 transitions. [2020-10-24 02:43:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-10-24 02:43:42,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:43:42,471 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] [2020-10-24 02:43:42,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:43:42,472 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:43:42,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:43:42,473 INFO L82 PathProgramCache]: Analyzing trace with hash -674942744, now seen corresponding path program 1 times [2020-10-24 02:43:42,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:43:42,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489953366] [2020-10-24 02:43:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:43:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:43,363 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-24 02:43:43,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:43:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:43,717 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 02:43:43,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489953366] [2020-10-24 02:43:43,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:43:43,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:43:43,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052527498] [2020-10-24 02:43:43,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:43:43,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:43:43,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:43:43,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:43:43,736 INFO L87 Difference]: Start difference. First operand 1301 states and 1554 transitions. Second operand 4 states. [2020-10-24 02:43:47,311 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-24 02:43:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:43:48,890 INFO L93 Difference]: Finished difference Result 2366 states and 2920 transitions. [2020-10-24 02:43:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:43:48,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 432 [2020-10-24 02:43:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:43:48,908 INFO L225 Difference]: With dead ends: 2366 [2020-10-24 02:43:48,908 INFO L226 Difference]: Without dead ends: 1926 [2020-10-24 02:43:48,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:43:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2020-10-24 02:43:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1913. [2020-10-24 02:43:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1913 states. [2020-10-24 02:43:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 2338 transitions. [2020-10-24 02:43:49,039 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 2338 transitions. Word has length 432 [2020-10-24 02:43:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:43:49,041 INFO L481 AbstractCegarLoop]: Abstraction has 1913 states and 2338 transitions. [2020-10-24 02:43:49,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:43:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 2338 transitions. [2020-10-24 02:43:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-10-24 02:43:49,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:43:49,052 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] [2020-10-24 02:43:49,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:43:49,054 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:43:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:43:49,055 INFO L82 PathProgramCache]: Analyzing trace with hash -208040197, now seen corresponding path program 1 times [2020-10-24 02:43:49,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:43:49,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002037556] [2020-10-24 02:43:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:43:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:49,715 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-24 02:43:49,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:43:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:50,009 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 02:43:50,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002037556] [2020-10-24 02:43:50,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:43:50,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:43:50,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899490828] [2020-10-24 02:43:50,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:43:50,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:43:50,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:43:50,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:43:50,012 INFO L87 Difference]: Start difference. First operand 1913 states and 2338 transitions. Second operand 4 states. [2020-10-24 02:43:53,413 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-24 02:43:55,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:43:55,220 INFO L93 Difference]: Finished difference Result 3844 states and 4843 transitions. [2020-10-24 02:43:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:43:55,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 432 [2020-10-24 02:43:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:43:55,241 INFO L225 Difference]: With dead ends: 3844 [2020-10-24 02:43:55,242 INFO L226 Difference]: Without dead ends: 3156 [2020-10-24 02:43:55,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:43:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2020-10-24 02:43:55,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 3133. [2020-10-24 02:43:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3133 states. [2020-10-24 02:43:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3133 states to 3133 states and 3902 transitions. [2020-10-24 02:43:55,386 INFO L78 Accepts]: Start accepts. Automaton has 3133 states and 3902 transitions. Word has length 432 [2020-10-24 02:43:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:43:55,387 INFO L481 AbstractCegarLoop]: Abstraction has 3133 states and 3902 transitions. [2020-10-24 02:43:55,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:43:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3133 states and 3902 transitions. [2020-10-24 02:43:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-10-24 02:43:55,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:43:55,403 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] [2020-10-24 02:43:55,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:43:55,403 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:43:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:43:55,404 INFO L82 PathProgramCache]: Analyzing trace with hash 89153498, now seen corresponding path program 1 times [2020-10-24 02:43:55,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:43:55,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32726981] [2020-10-24 02:43:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:43:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:56,161 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-24 02:43:56,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:43:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:56,494 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 02:43:56,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32726981] [2020-10-24 02:43:56,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:43:56,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:43:56,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590245399] [2020-10-24 02:43:56,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:43:56,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:43:56,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:43:56,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:43:56,498 INFO L87 Difference]: Start difference. First operand 3133 states and 3902 transitions. Second operand 5 states. [2020-10-24 02:44:03,012 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-24 02:44:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:44:05,065 INFO L93 Difference]: Finished difference Result 8844 states and 11085 transitions. [2020-10-24 02:44:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:44:05,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 432 [2020-10-24 02:44:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:44:05,098 INFO L225 Difference]: With dead ends: 8844 [2020-10-24 02:44:05,099 INFO L226 Difference]: Without dead ends: 5902 [2020-10-24 02:44:05,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:44:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5902 states. [2020-10-24 02:44:05,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5902 to 5761. [2020-10-24 02:44:05,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5761 states. [2020-10-24 02:44:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 7194 transitions. [2020-10-24 02:44:05,483 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 7194 transitions. Word has length 432 [2020-10-24 02:44:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:44:05,484 INFO L481 AbstractCegarLoop]: Abstraction has 5761 states and 7194 transitions. [2020-10-24 02:44:05,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:44:05,484 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 7194 transitions. [2020-10-24 02:44:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-10-24 02:44:05,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:44:05,505 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] [2020-10-24 02:44:05,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:44:05,505 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:44:05,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:44:05,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1177516810, now seen corresponding path program 1 times [2020-10-24 02:44:05,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:44:05,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606017505] [2020-10-24 02:44:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:44:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:06,046 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-24 02:44:06,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:44:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:06,319 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 02:44:06,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606017505] [2020-10-24 02:44:06,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:44:06,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:44:06,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499116029] [2020-10-24 02:44:06,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:44:06,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:44:06,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:44:06,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:44:06,323 INFO L87 Difference]: Start difference. First operand 5761 states and 7194 transitions. Second operand 4 states. [2020-10-24 02:44:14,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:44:14,280 INFO L93 Difference]: Finished difference Result 16862 states and 21138 transitions. [2020-10-24 02:44:14,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:44:14,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 433 [2020-10-24 02:44:14,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:44:14,341 INFO L225 Difference]: With dead ends: 16862 [2020-10-24 02:44:14,341 INFO L226 Difference]: Without dead ends: 11326 [2020-10-24 02:44:14,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:44:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11326 states. [2020-10-24 02:44:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11326 to 5763. [2020-10-24 02:44:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5763 states. [2020-10-24 02:44:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5763 states to 5763 states and 7196 transitions. [2020-10-24 02:44:14,965 INFO L78 Accepts]: Start accepts. Automaton has 5763 states and 7196 transitions. Word has length 433 [2020-10-24 02:44:14,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:44:14,966 INFO L481 AbstractCegarLoop]: Abstraction has 5763 states and 7196 transitions. [2020-10-24 02:44:14,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:44:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5763 states and 7196 transitions. [2020-10-24 02:44:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-10-24 02:44:14,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:44:14,981 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] [2020-10-24 02:44:14,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:44:14,981 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:44:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:44:14,982 INFO L82 PathProgramCache]: Analyzing trace with hash 626711735, now seen corresponding path program 1 times [2020-10-24 02:44:14,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:44:14,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10798375] [2020-10-24 02:44:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:44:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:15,579 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-24 02:44:15,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:44:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:15,875 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 02:44:15,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10798375] [2020-10-24 02:44:15,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:44:15,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:44:15,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567858247] [2020-10-24 02:44:15,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:44:15,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:44:15,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:44:15,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:44:15,879 INFO L87 Difference]: Start difference. First operand 5763 states and 7196 transitions. Second operand 4 states. [2020-10-24 02:44:21,926 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-24 02:44:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:44:23,743 INFO L93 Difference]: Finished difference Result 15137 states and 18947 transitions. [2020-10-24 02:44:23,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:44:23,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 434 [2020-10-24 02:44:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:44:23,794 INFO L225 Difference]: With dead ends: 15137 [2020-10-24 02:44:23,794 INFO L226 Difference]: Without dead ends: 9808 [2020-10-24 02:44:23,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:44:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9808 states. [2020-10-24 02:44:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9808 to 9667. [2020-10-24 02:44:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9667 states. [2020-10-24 02:44:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9667 states to 9667 states and 12027 transitions. [2020-10-24 02:44:24,857 INFO L78 Accepts]: Start accepts. Automaton has 9667 states and 12027 transitions. Word has length 434 [2020-10-24 02:44:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:44:24,858 INFO L481 AbstractCegarLoop]: Abstraction has 9667 states and 12027 transitions. [2020-10-24 02:44:24,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:44:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 9667 states and 12027 transitions. [2020-10-24 02:44:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-10-24 02:44:24,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:44:24,878 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] [2020-10-24 02:44:24,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:44:24,879 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:44:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:44:24,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1373547575, now seen corresponding path program 1 times [2020-10-24 02:44:24,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:44:24,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836757742] [2020-10-24 02:44:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:44:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:25,537 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-24 02:44:25,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:44:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:25,824 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 02:44:25,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836757742] [2020-10-24 02:44:25,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:44:25,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:44:25,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215787533] [2020-10-24 02:44:25,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:44:25,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:44:25,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:44:25,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:44:25,827 INFO L87 Difference]: Start difference. First operand 9667 states and 12027 transitions. Second operand 5 states. [2020-10-24 02:44:32,027 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-24 02:44:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:44:34,313 INFO L93 Difference]: Finished difference Result 27700 states and 34493 transitions. [2020-10-24 02:44:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:44:34,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 434 [2020-10-24 02:44:34,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:44:34,368 INFO L225 Difference]: With dead ends: 27700 [2020-10-24 02:44:34,369 INFO L226 Difference]: Without dead ends: 18229 [2020-10-24 02:44:34,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:44:34,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18229 states. [2020-10-24 02:44:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18229 to 18109. [2020-10-24 02:44:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18109 states. [2020-10-24 02:44:35,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18109 states to 18109 states and 22415 transitions. [2020-10-24 02:44:35,922 INFO L78 Accepts]: Start accepts. Automaton has 18109 states and 22415 transitions. Word has length 434 [2020-10-24 02:44:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:44:35,923 INFO L481 AbstractCegarLoop]: Abstraction has 18109 states and 22415 transitions. [2020-10-24 02:44:35,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:44:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 18109 states and 22415 transitions. [2020-10-24 02:44:35,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-10-24 02:44:35,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:44:35,954 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] [2020-10-24 02:44:35,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:44:35,954 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:44:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:44:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash -405235554, now seen corresponding path program 1 times [2020-10-24 02:44:35,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:44:35,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078241240] [2020-10-24 02:44:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:44:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:36,567 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-24 02:44:36,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:44:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:36,768 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 02:44:36,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078241240] [2020-10-24 02:44:36,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:44:36,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:44:36,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468523648] [2020-10-24 02:44:36,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:44:36,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:44:36,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:44:36,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:44:36,771 INFO L87 Difference]: Start difference. First operand 18109 states and 22415 transitions. Second operand 5 states. [2020-10-24 02:44:43,465 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-24 02:44:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:44:46,061 INFO L93 Difference]: Finished difference Result 52626 states and 65116 transitions. [2020-10-24 02:44:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:44:46,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 434 [2020-10-24 02:44:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:44:46,179 INFO L225 Difference]: With dead ends: 52626 [2020-10-24 02:44:46,179 INFO L226 Difference]: Without dead ends: 34788 [2020-10-24 02:44:46,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:44:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34788 states. [2020-10-24 02:44:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34788 to 34633. [2020-10-24 02:44:49,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34633 states. [2020-10-24 02:44:49,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34633 states to 34633 states and 42594 transitions. [2020-10-24 02:44:49,495 INFO L78 Accepts]: Start accepts. Automaton has 34633 states and 42594 transitions. Word has length 434 [2020-10-24 02:44:49,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:44:49,496 INFO L481 AbstractCegarLoop]: Abstraction has 34633 states and 42594 transitions. [2020-10-24 02:44:49,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:44:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 34633 states and 42594 transitions. [2020-10-24 02:44:49,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-10-24 02:44:49,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:44:49,570 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] [2020-10-24 02:44:49,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:44:49,570 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:44:49,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:44:49,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1112545506, now seen corresponding path program 1 times [2020-10-24 02:44:49,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:44:49,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465399185] [2020-10-24 02:44:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:44:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:50,132 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-24 02:44:50,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:44:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:50,436 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 02:44:50,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465399185] [2020-10-24 02:44:50,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:44:50,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:44:50,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321576206] [2020-10-24 02:44:50,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:44:50,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:44:50,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:44:50,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:44:50,439 INFO L87 Difference]: Start difference. First operand 34633 states and 42594 transitions. Second operand 4 states. [2020-10-24 02:45:05,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:45:05,050 INFO L93 Difference]: Finished difference Result 103290 states and 127093 transitions. [2020-10-24 02:45:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:45:05,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 435 [2020-10-24 02:45:05,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:45:05,292 INFO L225 Difference]: With dead ends: 103290 [2020-10-24 02:45:05,292 INFO L226 Difference]: Without dead ends: 68978 [2020-10-24 02:45:05,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:45:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68978 states. [2020-10-24 02:45:09,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68978 to 34643. [2020-10-24 02:45:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34643 states. [2020-10-24 02:45:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34643 states to 34643 states and 42604 transitions. [2020-10-24 02:45:09,737 INFO L78 Accepts]: Start accepts. Automaton has 34643 states and 42604 transitions. Word has length 435 [2020-10-24 02:45:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:45:09,737 INFO L481 AbstractCegarLoop]: Abstraction has 34643 states and 42604 transitions. [2020-10-24 02:45:09,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:45:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 34643 states and 42604 transitions. [2020-10-24 02:45:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-10-24 02:45:09,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:45:09,790 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] [2020-10-24 02:45:09,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:45:09,791 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:45:09,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:45:09,791 INFO L82 PathProgramCache]: Analyzing trace with hash -25734853, now seen corresponding path program 1 times [2020-10-24 02:45:09,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:45:09,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180787807] [2020-10-24 02:45:09,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:45:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:45:10,386 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-24 02:45:10,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:45:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:45:10,636 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 02:45:10,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180787807] [2020-10-24 02:45:10,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:45:10,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:45:10,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677758327] [2020-10-24 02:45:10,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:45:10,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:45:10,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:45:10,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:45:10,641 INFO L87 Difference]: Start difference. First operand 34643 states and 42604 transitions. Second operand 4 states. [2020-10-24 02:45:21,244 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-24 02:45:25,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:45:25,467 INFO L93 Difference]: Finished difference Result 92019 states and 112999 transitions. [2020-10-24 02:45:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:45:25,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 436 [2020-10-24 02:45:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:45:25,666 INFO L225 Difference]: With dead ends: 92019 [2020-10-24 02:45:25,667 INFO L226 Difference]: Without dead ends: 58724 [2020-10-24 02:45:25,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:45:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58724 states. [2020-10-24 02:45:32,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58724 to 58569. [2020-10-24 02:45:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58569 states. [2020-10-24 02:45:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58569 states to 58569 states and 71313 transitions. [2020-10-24 02:45:32,163 INFO L78 Accepts]: Start accepts. Automaton has 58569 states and 71313 transitions. Word has length 436 [2020-10-24 02:45:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:45:32,164 INFO L481 AbstractCegarLoop]: Abstraction has 58569 states and 71313 transitions. [2020-10-24 02:45:32,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:45:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 58569 states and 71313 transitions. [2020-10-24 02:45:32,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-10-24 02:45:32,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:45:32,422 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] [2020-10-24 02:45:32,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:45:32,423 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:45:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:45:32,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1880309573, now seen corresponding path program 1 times [2020-10-24 02:45:32,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:45:32,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458793913] [2020-10-24 02:45:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:45:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:45:33,076 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-24 02:45:33,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:45:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:45:33,498 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 02:45:33,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458793913] [2020-10-24 02:45:33,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:45:33,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:45:33,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656596530] [2020-10-24 02:45:33,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:45:33,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:45:33,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:45:33,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:45:33,507 INFO L87 Difference]: Start difference. First operand 58569 states and 71313 transitions. Second operand 5 states. [2020-10-24 02:45:45,286 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-24 02:45:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:45:51,688 INFO L93 Difference]: Finished difference Result 156599 states and 190211 transitions. [2020-10-24 02:45:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:45:51,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 436 [2020-10-24 02:45:51,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:45:51,952 INFO L225 Difference]: With dead ends: 156599 [2020-10-24 02:45:51,952 INFO L226 Difference]: Without dead ends: 98327 [2020-10-24 02:45:52,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:45:52,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98327 states. [2020-10-24 02:46:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98327 to 98216. [2020-10-24 02:46:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98216 states. [2020-10-24 02:46:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98216 states to 98216 states and 118223 transitions. [2020-10-24 02:46:04,308 INFO L78 Accepts]: Start accepts. Automaton has 98216 states and 118223 transitions. Word has length 436 [2020-10-24 02:46:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:46:04,308 INFO L481 AbstractCegarLoop]: Abstraction has 98216 states and 118223 transitions. [2020-10-24 02:46:04,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:46:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 98216 states and 118223 transitions. [2020-10-24 02:46:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-10-24 02:46:04,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:46:04,722 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] [2020-10-24 02:46:04,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:46:04,723 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:46:04,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:46:04,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1865504778, now seen corresponding path program 1 times [2020-10-24 02:46:04,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:46:04,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210727373] [2020-10-24 02:46:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:46:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:46:05,458 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-24 02:46:05,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:46:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:46:05,895 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 02:46:05,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210727373] [2020-10-24 02:46:05,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:46:05,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:46:05,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480141128] [2020-10-24 02:46:05,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:46:05,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:46:05,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:46:05,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:46:05,899 INFO L87 Difference]: Start difference. First operand 98216 states and 118223 transitions. Second operand 5 states. [2020-10-24 02:46:19,760 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-24 02:46:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:46:27,232 INFO L93 Difference]: Finished difference Result 196935 states and 236989 transitions. [2020-10-24 02:46:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:46:27,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 436 [2020-10-24 02:46:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:46:27,534 INFO L225 Difference]: With dead ends: 196935 [2020-10-24 02:46:27,534 INFO L226 Difference]: Without dead ends: 99497 [2020-10-24 02:46:27,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:46:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99497 states. [2020-10-24 02:46:40,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99497 to 98778. [2020-10-24 02:46:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98778 states. [2020-10-24 02:46:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98778 states to 98778 states and 118832 transitions. [2020-10-24 02:46:40,713 INFO L78 Accepts]: Start accepts. Automaton has 98778 states and 118832 transitions. Word has length 436 [2020-10-24 02:46:40,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:46:40,714 INFO L481 AbstractCegarLoop]: Abstraction has 98778 states and 118832 transitions. [2020-10-24 02:46:40,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:46:40,714 INFO L276 IsEmpty]: Start isEmpty. Operand 98778 states and 118832 transitions. [2020-10-24 02:46:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-10-24 02:46:40,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:46:40,827 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] [2020-10-24 02:46:40,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:46:40,827 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:46:40,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:46:40,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1315989918, now seen corresponding path program 1 times [2020-10-24 02:46:40,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:46:40,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353895117] [2020-10-24 02:46:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:46:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:46:41,358 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-24 02:46:41,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:46:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:46:41,925 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 02:46:41,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353895117] [2020-10-24 02:46:41,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:46:41,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:46:41,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74688322] [2020-10-24 02:46:41,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:46:41,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:46:41,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:46:41,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:46:41,929 INFO L87 Difference]: Start difference. First operand 98778 states and 118832 transitions. Second operand 4 states.