/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:06:23,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:06:23,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:06:23,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:06:23,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:06:23,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:06:23,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:06:23,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:06:23,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:06:23,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:06:23,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:06:23,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:06:23,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:06:23,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:06:23,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:06:23,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:06:23,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:06:23,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:06:23,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:06:23,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:06:23,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:06:23,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:06:23,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:06:24,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:06:24,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 23:06:24,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 23:06:24,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 23:06:24,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 23:06:24,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 23:06:24,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 23:06:24,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 23:06:24,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 23:06:24,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 23:06:24,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 23:06:24,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 23:06:24,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 23:06:24,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 23:06:24,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 23:06:24,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:06:24,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:06:24,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:06:24,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 23:06:24,081 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:06:24,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:06:24,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:06:24,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:06:24,086 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:06:24,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:06:24,086 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:06:24,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:06:24,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:06:24,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:06:24,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:06:24,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:06:24,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:06:24,089 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:06:24,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:06:24,089 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:06:24,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:06:24,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:06:24,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:06:24,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:06:24,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:06:24,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:06:24,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:06:24,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:06:24,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:06:24,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:06:24,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:06:24,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:06:24,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:06:24,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:06:24,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:06:24,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:06:24,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:06:24,563 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:06:24,566 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:06:24,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-06 23:06:24,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98dc1d72e/e525ec8157f74fa7ab9b02409d4e5461/FLAG0c4f250ef [2020-11-06 23:06:25,602 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:06:25,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-06 23:06:25,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98dc1d72e/e525ec8157f74fa7ab9b02409d4e5461/FLAG0c4f250ef [2020-11-06 23:06:26,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98dc1d72e/e525ec8157f74fa7ab9b02409d4e5461 [2020-11-06 23:06:26,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:06:26,144 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:06:26,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:06:26,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:06:26,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:06:26,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:06:26" (1/1) ... [2020-11-06 23:06:26,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d99f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:26, skipping insertion in model container [2020-11-06 23:06:26,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:06:26" (1/1) ... [2020-11-06 23:06:26,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:06:26,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:06:27,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:06:27,859 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:06:28,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:06:28,789 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:06:28,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:28 WrapperNode [2020-11-06 23:06:28,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:06:28,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:06:28,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:06:28,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:06:28,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:28" (1/1) ... [2020-11-06 23:06:28,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:28" (1/1) ... [2020-11-06 23:06:28,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:28" (1/1) ... [2020-11-06 23:06:28,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:28" (1/1) ... [2020-11-06 23:06:28,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:28" (1/1) ... [2020-11-06 23:06:28,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:28" (1/1) ... [2020-11-06 23:06:29,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:28" (1/1) ... [2020-11-06 23:06:29,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:06:29,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:06:29,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:06:29,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:06:29,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:28" (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 [2020-11-06 23:06:29,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:06:29,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:06:29,114 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:06:29,114 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:06:29,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:06:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:06:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:06:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:06:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:06:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:06:29,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-11-06 23:06:29,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:06:29,117 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:06:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:06:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:06:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:06:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:06:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:06:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:06:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:06:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-11-06 23:06:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:06:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:06:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:06:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:06:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:06:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:06:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:06:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:06:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:06:33,879 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:06:33,880 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:06:33,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:06:33 BoogieIcfgContainer [2020-11-06 23:06:33,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:06:33,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:06:33,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:06:33,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:06:33,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:06:26" (1/3) ... [2020-11-06 23:06:33,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c5032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:06:33, skipping insertion in model container [2020-11-06 23:06:33,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:28" (2/3) ... [2020-11-06 23:06:33,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c5032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:06:33, skipping insertion in model container [2020-11-06 23:06:33,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:06:33" (3/3) ... [2020-11-06 23:06:33,893 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-06 23:06:33,908 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:06:33,913 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:06:33,926 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:06:33,962 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:06:33,962 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:06:33,962 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:06:33,962 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:06:33,962 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:06:33,962 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:06:33,963 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:06:33,963 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:06:34,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states. [2020-11-06 23:06:34,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-11-06 23:06:34,059 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:34,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:06:34,061 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:34,068 INFO L82 PathProgramCache]: Analyzing trace with hash 996821993, now seen corresponding path program 1 times [2020-11-06 23:06:34,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:34,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892392003] [2020-11-06 23:06:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:36,719 WARN L194 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:06:36,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:37,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892392003] [2020-11-06 23:06:37,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:37,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:37,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855082023] [2020-11-06 23:06:37,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:37,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:37,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:37,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:37,160 INFO L87 Difference]: Start difference. First operand 1453 states. Second operand 4 states. [2020-11-06 23:06:38,439 WARN L194 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 428 [2020-11-06 23:06:50,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:06:50,792 INFO L93 Difference]: Finished difference Result 2494 states and 4431 transitions. [2020-11-06 23:06:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:06:50,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-11-06 23:06:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:06:50,861 INFO L225 Difference]: With dead ends: 2494 [2020-11-06 23:06:50,862 INFO L226 Difference]: Without dead ends: 2188 [2020-11-06 23:06:50,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:06:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2020-11-06 23:06:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 2185. [2020-11-06 23:06:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2185 states. [2020-11-06 23:06:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 3564 transitions. [2020-11-06 23:06:51,073 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 3564 transitions. Word has length 497 [2020-11-06 23:06:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:51,074 INFO L481 AbstractCegarLoop]: Abstraction has 2185 states and 3564 transitions. [2020-11-06 23:06:51,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:06:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 3564 transitions. [2020-11-06 23:06:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-11-06 23:06:51,090 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:51,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:06:51,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:06:51,092 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:51,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:51,093 INFO L82 PathProgramCache]: Analyzing trace with hash -43387574, now seen corresponding path program 1 times [2020-11-06 23:06:51,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:51,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856511019] [2020-11-06 23:06:51,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:54,008 WARN L194 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:06:54,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:54,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856511019] [2020-11-06 23:06:54,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:54,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:06:54,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593891981] [2020-11-06 23:06:54,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:06:54,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:54,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:06:54,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:06:54,488 INFO L87 Difference]: Start difference. First operand 2185 states and 3564 transitions. Second operand 5 states. [2020-11-06 23:07:09,799 WARN L194 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:07:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:13,471 INFO L93 Difference]: Finished difference Result 6479 states and 10567 transitions. [2020-11-06 23:07:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:07:13,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 497 [2020-11-06 23:07:13,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:13,502 INFO L225 Difference]: With dead ends: 6479 [2020-11-06 23:07:13,502 INFO L226 Difference]: Without dead ends: 4311 [2020-11-06 23:07:13,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:07:13,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2020-11-06 23:07:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 4308. [2020-11-06 23:07:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4308 states. [2020-11-06 23:07:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4308 states to 4308 states and 7001 transitions. [2020-11-06 23:07:13,704 INFO L78 Accepts]: Start accepts. Automaton has 4308 states and 7001 transitions. Word has length 497 [2020-11-06 23:07:13,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:13,705 INFO L481 AbstractCegarLoop]: Abstraction has 4308 states and 7001 transitions. [2020-11-06 23:07:13,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:07:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4308 states and 7001 transitions. [2020-11-06 23:07:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-11-06 23:07:13,723 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:13,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:07:13,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:07:13,724 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:13,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:13,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1107668883, now seen corresponding path program 1 times [2020-11-06 23:07:13,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:13,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148961832] [2020-11-06 23:07:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:15,334 WARN L194 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:07:15,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:07:15,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148961832] [2020-11-06 23:07:15,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:15,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:07:15,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939397124] [2020-11-06 23:07:15,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:07:15,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:15,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:07:15,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:07:15,694 INFO L87 Difference]: Start difference. First operand 4308 states and 7001 transitions. Second operand 4 states. [2020-11-06 23:07:35,441 WARN L194 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 432 [2020-11-06 23:07:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:39,030 INFO L93 Difference]: Finished difference Result 12608 states and 20444 transitions. [2020-11-06 23:07:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:07:39,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-11-06 23:07:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:39,073 INFO L225 Difference]: With dead ends: 12608 [2020-11-06 23:07:39,073 INFO L226 Difference]: Without dead ends: 8514 [2020-11-06 23:07:39,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:07:39,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8514 states. [2020-11-06 23:07:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8514 to 8511. [2020-11-06 23:07:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8511 states. [2020-11-06 23:07:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8511 states to 8511 states and 13786 transitions. [2020-11-06 23:07:39,438 INFO L78 Accepts]: Start accepts. Automaton has 8511 states and 13786 transitions. Word has length 499 [2020-11-06 23:07:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:39,439 INFO L481 AbstractCegarLoop]: Abstraction has 8511 states and 13786 transitions. [2020-11-06 23:07:39,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:07:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 8511 states and 13786 transitions. [2020-11-06 23:07:39,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-11-06 23:07:39,461 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:39,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:07:39,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:07:39,462 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:39,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:39,463 INFO L82 PathProgramCache]: Analyzing trace with hash -330135590, now seen corresponding path program 1 times [2020-11-06 23:07:39,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:39,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963422809] [2020-11-06 23:07:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:41,008 WARN L194 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:07:41,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:07:41,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963422809] [2020-11-06 23:07:41,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:41,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:07:41,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578843824] [2020-11-06 23:07:41,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:07:41,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:41,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:07:41,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:07:41,273 INFO L87 Difference]: Start difference. First operand 8511 states and 13786 transitions. Second operand 4 states. [2020-11-06 23:08:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:08:04,033 INFO L93 Difference]: Finished difference Result 25434 states and 41189 transitions. [2020-11-06 23:08:04,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:08:04,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-11-06 23:08:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:08:04,107 INFO L225 Difference]: With dead ends: 25434 [2020-11-06 23:08:04,108 INFO L226 Difference]: Without dead ends: 16975 [2020-11-06 23:08:04,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:08:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16975 states. [2020-11-06 23:08:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16975 to 8558. [2020-11-06 23:08:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8558 states. [2020-11-06 23:08:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 13860 transitions. [2020-11-06 23:08:04,665 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 13860 transitions. Word has length 500 [2020-11-06 23:08:04,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:08:04,665 INFO L481 AbstractCegarLoop]: Abstraction has 8558 states and 13860 transitions. [2020-11-06 23:08:04,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:08:04,666 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 13860 transitions. [2020-11-06 23:08:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-11-06 23:08:04,685 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:08:04,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:08:04,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:08:04,687 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:08:04,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:08:04,688 INFO L82 PathProgramCache]: Analyzing trace with hash 464094194, now seen corresponding path program 1 times [2020-11-06 23:08:04,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:08:04,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107547838] [2020-11-06 23:08:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:08:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:06,332 WARN L194 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:08:06,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:08:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:08:06,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107547838] [2020-11-06 23:08:06,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:08:06,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:08:06,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399022120] [2020-11-06 23:08:06,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:08:06,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:08:06,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:08:06,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:08:06,684 INFO L87 Difference]: Start difference. First operand 8558 states and 13860 transitions. Second operand 4 states. [2020-11-06 23:08:27,498 WARN L194 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 432 [2020-11-06 23:08:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:08:31,171 INFO L93 Difference]: Finished difference Result 24923 states and 40251 transitions. [2020-11-06 23:08:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:08:31,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-11-06 23:08:31,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:08:31,208 INFO L225 Difference]: With dead ends: 24923 [2020-11-06 23:08:31,209 INFO L226 Difference]: Without dead ends: 16764 [2020-11-06 23:08:31,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:08:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16764 states. [2020-11-06 23:08:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16764 to 16761. [2020-11-06 23:08:31,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16761 states. [2020-11-06 23:08:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16761 states to 16761 states and 27018 transitions. [2020-11-06 23:08:32,032 INFO L78 Accepts]: Start accepts. Automaton has 16761 states and 27018 transitions. Word has length 501 [2020-11-06 23:08:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:08:32,033 INFO L481 AbstractCegarLoop]: Abstraction has 16761 states and 27018 transitions. [2020-11-06 23:08:32,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:08:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 16761 states and 27018 transitions. [2020-11-06 23:08:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-11-06 23:08:32,067 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:08:32,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:08:32,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:08:32,068 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:08:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:08:32,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1106707315, now seen corresponding path program 1 times [2020-11-06 23:08:32,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:08:32,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813441645] [2020-11-06 23:08:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:08:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:33,630 WARN L194 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:08:33,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:08:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:08:33,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813441645] [2020-11-06 23:08:33,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:08:33,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:08:33,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064645820] [2020-11-06 23:08:33,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:08:33,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:08:33,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:08:33,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:08:33,884 INFO L87 Difference]: Start difference. First operand 16761 states and 27018 transitions. Second operand 4 states. [2020-11-06 23:08:58,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:08:58,258 INFO L93 Difference]: Finished difference Result 50025 states and 80608 transitions. [2020-11-06 23:08:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:08:58,259 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-11-06 23:08:58,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:08:58,325 INFO L225 Difference]: With dead ends: 50025 [2020-11-06 23:08:58,325 INFO L226 Difference]: Without dead ends: 33408 [2020-11-06 23:08:58,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:08:58,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33408 states. [2020-11-06 23:08:59,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33408 to 16859. [2020-11-06 23:08:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16859 states. [2020-11-06 23:08:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16859 states to 16859 states and 27169 transitions. [2020-11-06 23:08:59,358 INFO L78 Accepts]: Start accepts. Automaton has 16859 states and 27169 transitions. Word has length 501 [2020-11-06 23:08:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:08:59,358 INFO L481 AbstractCegarLoop]: Abstraction has 16859 states and 27169 transitions. [2020-11-06 23:08:59,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:08:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 16859 states and 27169 transitions. [2020-11-06 23:08:59,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-11-06 23:08:59,387 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:08:59,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:08:59,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:08:59,388 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:08:59,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:08:59,389 INFO L82 PathProgramCache]: Analyzing trace with hash -835583255, now seen corresponding path program 1 times [2020-11-06 23:08:59,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:08:59,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814858814] [2020-11-06 23:08:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:08:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:00,870 WARN L194 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:09:00,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:09:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:09:01,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814858814] [2020-11-06 23:09:01,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:09:01,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:09:01,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137440732] [2020-11-06 23:09:01,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:09:01,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:09:01,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:09:01,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:09:01,148 INFO L87 Difference]: Start difference. First operand 16859 states and 27169 transitions. Second operand 4 states. [2020-11-06 23:09:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:09:26,306 INFO L93 Difference]: Finished difference Result 50160 states and 80789 transitions. [2020-11-06 23:09:26,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:09:26,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-11-06 23:09:26,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:09:26,367 INFO L225 Difference]: With dead ends: 50160 [2020-11-06 23:09:26,367 INFO L226 Difference]: Without dead ends: 33525 [2020-11-06 23:09:26,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:09:26,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33525 states. [2020-11-06 23:09:27,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33525 to 16976. [2020-11-06 23:09:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16976 states. [2020-11-06 23:09:27,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16976 states to 16976 states and 27315 transitions. [2020-11-06 23:09:27,487 INFO L78 Accepts]: Start accepts. Automaton has 16976 states and 27315 transitions. Word has length 502 [2020-11-06 23:09:27,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:09:27,487 INFO L481 AbstractCegarLoop]: Abstraction has 16976 states and 27315 transitions. [2020-11-06 23:09:27,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:09:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 16976 states and 27315 transitions. [2020-11-06 23:09:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-11-06 23:09:27,519 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:09:27,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:09:27,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:09:27,520 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:09:27,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:09:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash -150298144, now seen corresponding path program 1 times [2020-11-06 23:09:27,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:09:27,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684316683] [2020-11-06 23:09:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:09:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:29,148 WARN L194 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:09:29,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:09:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:09:29,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684316683] [2020-11-06 23:09:29,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:09:29,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:09:29,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915656517] [2020-11-06 23:09:29,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:09:29,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:09:29,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:09:29,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:09:29,336 INFO L87 Difference]: Start difference. First operand 16976 states and 27315 transitions. Second operand 4 states. [2020-11-06 23:09:47,801 WARN L194 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 432 [2020-11-06 23:09:48,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:09:48,118 INFO L93 Difference]: Finished difference Result 36910 states and 58975 transitions. [2020-11-06 23:09:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:09:48,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 503 [2020-11-06 23:09:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:09:48,154 INFO L225 Difference]: With dead ends: 36910 [2020-11-06 23:09:48,154 INFO L226 Difference]: Without dead ends: 24451 [2020-11-06 23:09:48,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:09:48,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24451 states. [2020-11-06 23:09:49,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24451 to 20176. [2020-11-06 23:09:49,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20176 states. [2020-11-06 23:09:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20176 states to 20176 states and 32639 transitions. [2020-11-06 23:09:49,205 INFO L78 Accepts]: Start accepts. Automaton has 20176 states and 32639 transitions. Word has length 503 [2020-11-06 23:09:49,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:09:49,206 INFO L481 AbstractCegarLoop]: Abstraction has 20176 states and 32639 transitions. [2020-11-06 23:09:49,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:09:49,206 INFO L276 IsEmpty]: Start isEmpty. Operand 20176 states and 32639 transitions. [2020-11-06 23:09:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-11-06 23:09:49,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:09:49,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:09:49,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:09:49,235 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:09:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:09:49,235 INFO L82 PathProgramCache]: Analyzing trace with hash -952981606, now seen corresponding path program 1 times [2020-11-06 23:09:49,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:09:49,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085347955] [2020-11-06 23:09:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:09:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:51,510 WARN L194 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:09:51,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:09:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:09:51,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085347955] [2020-11-06 23:09:51,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:09:51,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:09:51,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248395656] [2020-11-06 23:09:51,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:09:51,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:09:51,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:09:51,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:09:51,942 INFO L87 Difference]: Start difference. First operand 20176 states and 32639 transitions. Second operand 5 states. [2020-11-06 23:10:10,259 WARN L194 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:10:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:10:14,614 INFO L93 Difference]: Finished difference Result 59222 states and 95798 transitions. [2020-11-06 23:10:14,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:10:14,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 503 [2020-11-06 23:10:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:10:14,689 INFO L225 Difference]: With dead ends: 59222 [2020-11-06 23:10:14,689 INFO L226 Difference]: Without dead ends: 39219 [2020-11-06 23:10:14,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:10:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39219 states. [2020-11-06 23:10:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39219 to 39216. [2020-11-06 23:10:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39216 states. [2020-11-06 23:10:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39216 states to 39216 states and 63175 transitions. [2020-11-06 23:10:16,818 INFO L78 Accepts]: Start accepts. Automaton has 39216 states and 63175 transitions. Word has length 503 [2020-11-06 23:10:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:10:16,819 INFO L481 AbstractCegarLoop]: Abstraction has 39216 states and 63175 transitions. [2020-11-06 23:10:16,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:10:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 39216 states and 63175 transitions. [2020-11-06 23:10:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-11-06 23:10:16,846 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:10:16,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:10:16,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:10:16,846 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:10:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:10:16,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1010054305, now seen corresponding path program 1 times [2020-11-06 23:10:16,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:10:16,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771661047] [2020-11-06 23:10:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:10:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:18,486 WARN L194 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:10:18,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:10:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:10:19,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771661047] [2020-11-06 23:10:19,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:10:19,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:10:19,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474223120] [2020-11-06 23:10:19,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:10:19,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:10:19,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:10:19,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:10:19,094 INFO L87 Difference]: Start difference. First operand 39216 states and 63175 transitions. Second operand 4 states. [2020-11-06 23:10:43,299 WARN L194 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 432 [2020-11-06 23:10:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:10:48,414 INFO L93 Difference]: Finished difference Result 115375 states and 185711 transitions. [2020-11-06 23:10:48,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:10:48,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-11-06 23:10:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:10:48,517 INFO L225 Difference]: With dead ends: 115375 [2020-11-06 23:10:48,517 INFO L226 Difference]: Without dead ends: 77188 [2020-11-06 23:10:48,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:10:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77188 states. [2020-11-06 23:10:52,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77188 to 77185. [2020-11-06 23:10:52,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77185 states. [2020-11-06 23:10:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77185 states to 77185 states and 123877 transitions. [2020-11-06 23:10:52,795 INFO L78 Accepts]: Start accepts. Automaton has 77185 states and 123877 transitions. Word has length 505 [2020-11-06 23:10:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:10:52,801 INFO L481 AbstractCegarLoop]: Abstraction has 77185 states and 123877 transitions. [2020-11-06 23:10:52,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:10:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 77185 states and 123877 transitions. [2020-11-06 23:10:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-11-06 23:10:52,899 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:10:52,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:10:52,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:10:52,900 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:10:52,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:10:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1914826650, now seen corresponding path program 1 times [2020-11-06 23:10:52,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:10:52,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095400746] [2020-11-06 23:10:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:10:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:54,894 WARN L194 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:10:54,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:10:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:10:55,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095400746] [2020-11-06 23:10:55,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:10:55,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:10:55,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809918320] [2020-11-06 23:10:55,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:10:55,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:10:55,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:10:55,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:10:55,347 INFO L87 Difference]: Start difference. First operand 77185 states and 123877 transitions. Second operand 4 states. [2020-11-06 23:11:20,587 WARN L194 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 432 [2020-11-06 23:11:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:11:27,022 INFO L93 Difference]: Finished difference Result 226465 states and 362880 transitions. [2020-11-06 23:11:27,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:11:27,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2020-11-06 23:11:27,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:11:27,222 INFO L225 Difference]: With dead ends: 226465 [2020-11-06 23:11:27,222 INFO L226 Difference]: Without dead ends: 151566 [2020-11-06 23:11:27,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:11:27,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151566 states. [2020-11-06 23:11:35,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151566 to 151563. [2020-11-06 23:11:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151563 states. [2020-11-06 23:11:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151563 states to 151563 states and 242194 transitions. [2020-11-06 23:11:35,662 INFO L78 Accepts]: Start accepts. Automaton has 151563 states and 242194 transitions. Word has length 507 [2020-11-06 23:11:35,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:11:35,663 INFO L481 AbstractCegarLoop]: Abstraction has 151563 states and 242194 transitions. [2020-11-06 23:11:35,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:11:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 151563 states and 242194 transitions. [2020-11-06 23:11:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-11-06 23:11:35,788 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:11:35,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:11:35,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:11:35,789 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:11:35,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:11:35,790 INFO L82 PathProgramCache]: Analyzing trace with hash -59020951, now seen corresponding path program 1 times [2020-11-06 23:11:35,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:11:35,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287839220] [2020-11-06 23:11:35,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:11:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:11:38,690 WARN L194 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:11:38,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:11:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:11:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:11:39,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287839220] [2020-11-06 23:11:39,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:11:39,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:11:39,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570471082] [2020-11-06 23:11:39,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:11:39,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:11:39,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:11:39,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:11:39,080 INFO L87 Difference]: Start difference. First operand 151563 states and 242194 transitions. Second operand 5 states. [2020-11-06 23:12:06,905 WARN L194 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:12:16,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:12:16,774 INFO L93 Difference]: Finished difference Result 449761 states and 718684 transitions. [2020-11-06 23:12:16,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:12:16,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 507 [2020-11-06 23:12:16,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:12:17,660 INFO L225 Difference]: With dead ends: 449761 [2020-11-06 23:12:17,660 INFO L226 Difference]: Without dead ends: 298489 [2020-11-06 23:12:18,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:12:18,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298489 states. [2020-11-06 23:12:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298489 to 298486. [2020-11-06 23:12:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298486 states. [2020-11-06 23:12:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298486 states to 298486 states and 474963 transitions. [2020-11-06 23:12:37,506 INFO L78 Accepts]: Start accepts. Automaton has 298486 states and 474963 transitions. Word has length 507 [2020-11-06 23:12:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:12:37,506 INFO L481 AbstractCegarLoop]: Abstraction has 298486 states and 474963 transitions. [2020-11-06 23:12:37,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:12:37,507 INFO L276 IsEmpty]: Start isEmpty. Operand 298486 states and 474963 transitions. [2020-11-06 23:12:38,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-11-06 23:12:38,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:12:38,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:12:38,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:12:38,136 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:12:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:12:38,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1339371144, now seen corresponding path program 1 times [2020-11-06 23:12:38,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:12:38,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947271332] [2020-11-06 23:12:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:12:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:12:40,282 WARN L194 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:12:40,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:12:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:12:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:12:40,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947271332] [2020-11-06 23:12:40,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:12:40,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:12:40,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017807070] [2020-11-06 23:12:40,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:12:40,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:12:40,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:12:40,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:12:40,813 INFO L87 Difference]: Start difference. First operand 298486 states and 474963 transitions. Second operand 5 states. [2020-11-06 23:13:16,702 WARN L194 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 433 [2020-11-06 23:13:32,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:13:32,787 INFO L93 Difference]: Finished difference Result 886880 states and 1410663 transitions. [2020-11-06 23:13:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:13:32,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 509 [2020-11-06 23:13:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:13:34,095 INFO L225 Difference]: With dead ends: 886880 [2020-11-06 23:13:34,096 INFO L226 Difference]: Without dead ends: 589109 [2020-11-06 23:13:34,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:13:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589109 states. [2020-11-06 23:14:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589109 to 589106. [2020-11-06 23:14:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589106 states. [2020-11-06 23:14:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589106 states to 589106 states and 933622 transitions. [2020-11-06 23:14:14,014 INFO L78 Accepts]: Start accepts. Automaton has 589106 states and 933622 transitions. Word has length 509 [2020-11-06 23:14:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:14:14,014 INFO L481 AbstractCegarLoop]: Abstraction has 589106 states and 933622 transitions. [2020-11-06 23:14:14,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:14:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 589106 states and 933622 transitions. [2020-11-06 23:14:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-11-06 23:14:15,237 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:14:15,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:14:15,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-06 23:14:15,240 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:14:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:14:15,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1455980555, now seen corresponding path program 1 times [2020-11-06 23:14:15,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:14:15,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183599059] [2020-11-06 23:14:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:14:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:14:17,511 WARN L194 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:14:17,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:14:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat