/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:50:08,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:50:08,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:50:08,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:50:08,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:50:08,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:50:08,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:50:08,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:50:08,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:50:08,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:50:08,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:50:08,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:50:08,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:50:08,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:50:08,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:50:08,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:50:08,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:50:08,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:50:08,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:50:08,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:50:08,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:50:08,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:50:08,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:50:08,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:50:08,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 16:50:08,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 16:50:08,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 16:50:08,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 16:50:08,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 16:50:08,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-02-21 16:50:08,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:50:08,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:50:08,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:50:08,956 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 [2021-02-21 16:50:08,983 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:50:08,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:50:08,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:50:08,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:50:08,985 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:50:08,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:50:08,986 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:50:08,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:50:08,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:50:08,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:50:08,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:50:08,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:50:08,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:50:08,988 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:50:08,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:50:08,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:50:08,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:50:08,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:50:08,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:50:08,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:50:08,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:50:08,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:50:08,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:50:08,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:50:08,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:50:08,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:50:08,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:50:08,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:50:08,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:50:09,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:50:09,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:50:09,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:50:09,451 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:50:09,451 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:50:09,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-02-21 16:50:09,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41cc1ee47/458b52b6f85a4c22885a020f839f7fd9/FLAG5c1a32d2f [2021-02-21 16:50:10,468 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:50:10,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-02-21 16:50:10,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41cc1ee47/458b52b6f85a4c22885a020f839f7fd9/FLAG5c1a32d2f [2021-02-21 16:50:11,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41cc1ee47/458b52b6f85a4c22885a020f839f7fd9 [2021-02-21 16:50:11,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:50:11,037 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:50:11,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:50:11,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:50:11,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:50:11,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:50:11" (1/1) ... [2021-02-21 16:50:11,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3061ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:11, skipping insertion in model container [2021-02-21 16:50:11,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:50:11" (1/1) ... [2021-02-21 16:50:11,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:50:11,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:50:12,474 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[54368,54381] [2021-02-21 16:50:12,598 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[60722,60735] [2021-02-21 16:50:12,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:50:12,956 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:50:13,688 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[54368,54381] [2021-02-21 16:50:13,796 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[60722,60735] [2021-02-21 16:50:14,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:50:14,143 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:50:14,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:14 WrapperNode [2021-02-21 16:50:14,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:50:14,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:50:14,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:50:14,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:50:14,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:14" (1/1) ... [2021-02-21 16:50:14,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:14" (1/1) ... [2021-02-21 16:50:14,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:14" (1/1) ... [2021-02-21 16:50:14,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:14" (1/1) ... [2021-02-21 16:50:14,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:14" (1/1) ... [2021-02-21 16:50:14,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:14" (1/1) ... [2021-02-21 16:50:14,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:14" (1/1) ... [2021-02-21 16:50:14,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:50:14,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:50:14,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:50:14,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:50:14,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:14" (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 [2021-02-21 16:50:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:50:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:50:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:50:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 16:50:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:50:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:50:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:50:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:50:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:50:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-21 16:50:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-02-21 16:50:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 16:50:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-21 16:50:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 16:50:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-21 16:50:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-21 16:50:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-21 16:50:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-21 16:50:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-21 16:50:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-21 16:50:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2021-02-21 16:50:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-21 16:50:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-21 16:50:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:50:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:50:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:50:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:50:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:50:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:50:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:50:19,191 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:50:19,192 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:50:19,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:50:19 BoogieIcfgContainer [2021-02-21 16:50:19,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:50:19,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:50:19,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:50:19,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:50:19,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:50:11" (1/3) ... [2021-02-21 16:50:19,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8bf869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:50:19, skipping insertion in model container [2021-02-21 16:50:19,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:14" (2/3) ... [2021-02-21 16:50:19,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8bf869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:50:19, skipping insertion in model container [2021-02-21 16:50:19,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:50:19" (3/3) ... [2021-02-21 16:50:19,205 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-02-21 16:50:19,212 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:50:19,220 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-02-21 16:50:19,241 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-02-21 16:50:19,278 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:50:19,279 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:50:19,279 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:50:19,279 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:50:19,279 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:50:19,279 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:50:19,279 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:50:19,280 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:50:19,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2021-02-21 16:50:19,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-02-21 16:50:19,373 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:50:19,378 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] [2021-02-21 16:50:19,379 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:50:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:50:19,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1952144117, now seen corresponding path program 1 times [2021-02-21 16:50:19,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:50:19,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551310258] [2021-02-21 16:50:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:50:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:21,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:21,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:21,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:21,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:50:21,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:21,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:50:21,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:21,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:22,722 WARN L202 SmtUtils]: Spent 988.00 ms on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:50:22,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:50:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:22,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:22,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:50:23,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551310258] [2021-02-21 16:50:23,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:50:23,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:50:23,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278855201] [2021-02-21 16:50:23,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:50:23,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:50:23,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:50:23,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:50:23,296 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 5 states. [2021-02-21 16:50:42,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:50:42,534 INFO L93 Difference]: Finished difference Result 4460 states and 8053 transitions. [2021-02-21 16:50:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 16:50:42,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2021-02-21 16:50:42,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:50:42,578 INFO L225 Difference]: With dead ends: 4460 [2021-02-21 16:50:42,578 INFO L226 Difference]: Without dead ends: 2963 [2021-02-21 16:50:42,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:50:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2021-02-21 16:50:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2906. [2021-02-21 16:50:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2906 states. [2021-02-21 16:50:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4772 transitions. [2021-02-21 16:50:42,870 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4772 transitions. Word has length 493 [2021-02-21 16:50:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:50:42,876 INFO L480 AbstractCegarLoop]: Abstraction has 2906 states and 4772 transitions. [2021-02-21 16:50:42,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:50:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4772 transitions. [2021-02-21 16:50:42,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2021-02-21 16:50:42,898 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:50:42,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:50:42,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:50:42,900 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:50:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:50:42,902 INFO L82 PathProgramCache]: Analyzing trace with hash -101762350, now seen corresponding path program 1 times [2021-02-21 16:50:42,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:50:42,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572821277] [2021-02-21 16:50:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:50:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:43,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:43,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:43,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:43,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:50:43,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:43,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:44,698 WARN L202 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:50:44,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:50:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:44,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:44,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:50:45,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572821277] [2021-02-21 16:50:45,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:50:45,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:50:45,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091660209] [2021-02-21 16:50:45,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:50:45,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:50:45,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:50:45,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:50:45,132 INFO L87 Difference]: Start difference. First operand 2906 states and 4772 transitions. Second operand 4 states. [2021-02-21 16:51:06,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:51:06,953 INFO L93 Difference]: Finished difference Result 8439 states and 13819 transitions. [2021-02-21 16:51:06,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:51:06,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2021-02-21 16:51:06,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:51:06,987 INFO L225 Difference]: With dead ends: 8439 [2021-02-21 16:51:06,987 INFO L226 Difference]: Without dead ends: 5747 [2021-02-21 16:51:06,994 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 [2021-02-21 16:51:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2021-02-21 16:51:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5692. [2021-02-21 16:51:07,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5692 states. [2021-02-21 16:51:07,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 9324 transitions. [2021-02-21 16:51:07,233 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 9324 transitions. Word has length 495 [2021-02-21 16:51:07,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:51:07,236 INFO L480 AbstractCegarLoop]: Abstraction has 5692 states and 9324 transitions. [2021-02-21 16:51:07,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:51:07,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 9324 transitions. [2021-02-21 16:51:07,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-02-21 16:51:07,257 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:51:07,258 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] [2021-02-21 16:51:07,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:51:07,259 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:51:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:51:07,262 INFO L82 PathProgramCache]: Analyzing trace with hash -955066856, now seen corresponding path program 1 times [2021-02-21 16:51:07,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:51:07,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082540642] [2021-02-21 16:51:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:51:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:07,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:07,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:07,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:07,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:51:07,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:07,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:08,918 WARN L202 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:51:08,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:51:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:08,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:08,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:51:09,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082540642] [2021-02-21 16:51:09,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:51:09,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:51:09,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548860604] [2021-02-21 16:51:09,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:51:09,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:51:09,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:51:09,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:51:09,146 INFO L87 Difference]: Start difference. First operand 5692 states and 9324 transitions. Second operand 4 states. [2021-02-21 16:51:30,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:51:30,071 INFO L93 Difference]: Finished difference Result 16979 states and 27804 transitions. [2021-02-21 16:51:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:51:30,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2021-02-21 16:51:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:51:30,123 INFO L225 Difference]: With dead ends: 16979 [2021-02-21 16:51:30,123 INFO L226 Difference]: Without dead ends: 11339 [2021-02-21 16:51:30,136 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 [2021-02-21 16:51:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11339 states. [2021-02-21 16:51:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11339 to 5739. [2021-02-21 16:51:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5739 states. [2021-02-21 16:51:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 9398 transitions. [2021-02-21 16:51:30,512 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 9398 transitions. Word has length 496 [2021-02-21 16:51:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:51:30,513 INFO L480 AbstractCegarLoop]: Abstraction has 5739 states and 9398 transitions. [2021-02-21 16:51:30,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:51:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 9398 transitions. [2021-02-21 16:51:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2021-02-21 16:51:30,533 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:51:30,534 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] [2021-02-21 16:51:30,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:51:30,534 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:51:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:51:30,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1610898441, now seen corresponding path program 1 times [2021-02-21 16:51:30,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:51:30,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843811555] [2021-02-21 16:51:30,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:51:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:30,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:30,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:30,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:30,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:51:30,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:30,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:32,179 WARN L202 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:51:32,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:51:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:32,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:32,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:51:32,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843811555] [2021-02-21 16:51:32,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:51:32,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:51:32,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480674690] [2021-02-21 16:51:32,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:51:32,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:51:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:51:32,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:51:32,564 INFO L87 Difference]: Start difference. First operand 5739 states and 9398 transitions. Second operand 4 states. [2021-02-21 16:51:53,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:51:53,881 INFO L93 Difference]: Finished difference Result 16541 states and 26991 transitions. [2021-02-21 16:51:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:51:53,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2021-02-21 16:51:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:51:53,926 INFO L225 Difference]: With dead ends: 16541 [2021-02-21 16:51:53,927 INFO L226 Difference]: Without dead ends: 11201 [2021-02-21 16:51:53,939 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 [2021-02-21 16:51:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11201 states. [2021-02-21 16:51:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11201 to 11148. [2021-02-21 16:51:54,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11148 states. [2021-02-21 16:51:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11148 states to 11148 states and 18172 transitions. [2021-02-21 16:51:54,562 INFO L78 Accepts]: Start accepts. Automaton has 11148 states and 18172 transitions. Word has length 497 [2021-02-21 16:51:54,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:51:54,563 INFO L480 AbstractCegarLoop]: Abstraction has 11148 states and 18172 transitions. [2021-02-21 16:51:54,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:51:54,563 INFO L276 IsEmpty]: Start isEmpty. Operand 11148 states and 18172 transitions. [2021-02-21 16:51:54,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2021-02-21 16:51:54,593 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:51:54,594 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] [2021-02-21 16:51:54,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:51:54,594 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:51:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:51:54,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1240620526, now seen corresponding path program 1 times [2021-02-21 16:51:54,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:51:54,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444608935] [2021-02-21 16:51:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:51:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:54,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:54,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:54,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:54,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:51:54,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:54,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:56,036 WARN L202 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:51:56,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:51:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:56,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:56,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:51:56,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444608935] [2021-02-21 16:51:56,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:51:56,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:51:56,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396698393] [2021-02-21 16:51:56,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:51:56,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:51:56,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:51:56,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:51:56,328 INFO L87 Difference]: Start difference. First operand 11148 states and 18172 transitions. Second operand 4 states. [2021-02-21 16:52:18,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:52:18,676 INFO L93 Difference]: Finished difference Result 33188 states and 54071 transitions. [2021-02-21 16:52:18,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:52:18,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2021-02-21 16:52:18,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:52:18,725 INFO L225 Difference]: With dead ends: 33188 [2021-02-21 16:52:18,725 INFO L226 Difference]: Without dead ends: 22184 [2021-02-21 16:52:18,750 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 [2021-02-21 16:52:18,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22184 states. [2021-02-21 16:52:19,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22184 to 11246. [2021-02-21 16:52:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11246 states. [2021-02-21 16:52:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 18323 transitions. [2021-02-21 16:52:19,397 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 18323 transitions. Word has length 497 [2021-02-21 16:52:19,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:52:19,397 INFO L480 AbstractCegarLoop]: Abstraction has 11246 states and 18323 transitions. [2021-02-21 16:52:19,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:52:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 18323 transitions. [2021-02-21 16:52:19,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2021-02-21 16:52:19,425 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:52:19,425 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] [2021-02-21 16:52:19,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:52:19,426 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:52:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:52:19,426 INFO L82 PathProgramCache]: Analyzing trace with hash 995158407, now seen corresponding path program 1 times [2021-02-21 16:52:19,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:52:19,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014027734] [2021-02-21 16:52:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:52:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:52:19,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:19,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:52:19,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:19,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:52:19,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:19,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:52:20,974 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:52:20,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:52:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:52:21,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:21,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:52:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:52:21,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014027734] [2021-02-21 16:52:21,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:52:21,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:52:21,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101773602] [2021-02-21 16:52:21,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:52:21,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:52:21,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:52:21,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:52:21,176 INFO L87 Difference]: Start difference. First operand 11246 states and 18323 transitions. Second operand 4 states. [2021-02-21 16:52:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:52:44,254 INFO L93 Difference]: Finished difference Result 33323 states and 54252 transitions. [2021-02-21 16:52:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:52:44,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2021-02-21 16:52:44,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:52:44,300 INFO L225 Difference]: With dead ends: 33323 [2021-02-21 16:52:44,300 INFO L226 Difference]: Without dead ends: 22301 [2021-02-21 16:52:44,324 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 [2021-02-21 16:52:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22301 states. [2021-02-21 16:52:44,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22301 to 11363. [2021-02-21 16:52:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11363 states. [2021-02-21 16:52:44,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11363 states to 11363 states and 18469 transitions. [2021-02-21 16:52:44,869 INFO L78 Accepts]: Start accepts. Automaton has 11363 states and 18469 transitions. Word has length 498 [2021-02-21 16:52:44,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:52:44,869 INFO L480 AbstractCegarLoop]: Abstraction has 11363 states and 18469 transitions. [2021-02-21 16:52:44,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:52:44,869 INFO L276 IsEmpty]: Start isEmpty. Operand 11363 states and 18469 transitions. [2021-02-21 16:52:44,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2021-02-21 16:52:44,906 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:52:44,907 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] [2021-02-21 16:52:44,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:52:44,909 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:52:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:52:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1309915419, now seen corresponding path program 1 times [2021-02-21 16:52:44,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:52:44,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89830141] [2021-02-21 16:52:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:52:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:52:45,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:45,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:52:45,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:45,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:52:45,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:45,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:52:46,520 WARN L202 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:52:46,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:52:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:52:46,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:46,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:52:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:52:46,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89830141] [2021-02-21 16:52:46,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:52:46,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:52:46,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610859826] [2021-02-21 16:52:46,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:52:46,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:52:46,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:52:46,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:52:46,845 INFO L87 Difference]: Start difference. First operand 11363 states and 18469 transitions. Second operand 4 states. [2021-02-21 16:53:02,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:53:02,734 INFO L93 Difference]: Finished difference Result 21947 states and 35242 transitions. [2021-02-21 16:53:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:53:02,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2021-02-21 16:53:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:53:02,764 INFO L225 Difference]: With dead ends: 21947 [2021-02-21 16:53:02,764 INFO L226 Difference]: Without dead ends: 15101 [2021-02-21 16:53:02,777 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 [2021-02-21 16:53:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15101 states. [2021-02-21 16:53:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15101 to 12963. [2021-02-21 16:53:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12963 states. [2021-02-21 16:53:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12963 states to 12963 states and 21117 transitions. [2021-02-21 16:53:03,336 INFO L78 Accepts]: Start accepts. Automaton has 12963 states and 21117 transitions. Word has length 499 [2021-02-21 16:53:03,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:53:03,337 INFO L480 AbstractCegarLoop]: Abstraction has 12963 states and 21117 transitions. [2021-02-21 16:53:03,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:53:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 12963 states and 21117 transitions. [2021-02-21 16:53:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2021-02-21 16:53:03,360 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:53:03,361 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] [2021-02-21 16:53:03,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:53:03,361 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:53:03,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:53:03,362 INFO L82 PathProgramCache]: Analyzing trace with hash -591822596, now seen corresponding path program 1 times [2021-02-21 16:53:03,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:53:03,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488627532] [2021-02-21 16:53:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:53:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:53:03,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:03,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:03,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:03,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:53:03,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:03,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:04,982 WARN L202 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:53:04,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:53:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:53:05,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:05,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:53:05,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488627532] [2021-02-21 16:53:05,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:53:05,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:53:05,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995022695] [2021-02-21 16:53:05,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:53:05,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:53:05,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:53:05,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:53:05,378 INFO L87 Difference]: Start difference. First operand 12963 states and 21117 transitions. Second operand 4 states. [2021-02-21 16:53:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:53:29,737 INFO L93 Difference]: Finished difference Result 37125 states and 60352 transitions. [2021-02-21 16:53:29,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:53:29,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2021-02-21 16:53:29,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:53:29,783 INFO L225 Difference]: With dead ends: 37125 [2021-02-21 16:53:29,783 INFO L226 Difference]: Without dead ends: 25131 [2021-02-21 16:53:29,807 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 [2021-02-21 16:53:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25131 states. [2021-02-21 16:53:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25131 to 25080. [2021-02-21 16:53:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25080 states. [2021-02-21 16:53:31,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 40686 transitions. [2021-02-21 16:53:31,233 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 40686 transitions. Word has length 499 [2021-02-21 16:53:31,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:53:31,233 INFO L480 AbstractCegarLoop]: Abstraction has 25080 states and 40686 transitions. [2021-02-21 16:53:31,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:53:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 40686 transitions. [2021-02-21 16:53:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2021-02-21 16:53:31,260 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:53:31,261 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] [2021-02-21 16:53:31,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:53:31,261 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:53:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:53:31,262 INFO L82 PathProgramCache]: Analyzing trace with hash 969883327, now seen corresponding path program 1 times [2021-02-21 16:53:31,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:53:31,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125260629] [2021-02-21 16:53:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:53:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:53:32,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:32,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:32,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:32,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:53:32,186 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-21 16:53:32,188 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-21 16:53:32,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:32,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:53:32,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:32,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:33,606 WARN L202 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:53:33,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:53:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:53:33,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:33,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:53:33,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125260629] [2021-02-21 16:53:33,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:53:33,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:53:33,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287343423] [2021-02-21 16:53:33,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:53:33,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:53:33,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:53:33,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:53:33,969 INFO L87 Difference]: Start difference. First operand 25080 states and 40686 transitions. Second operand 6 states. [2021-02-21 16:53:55,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:53:55,809 INFO L93 Difference]: Finished difference Result 73663 states and 119508 transitions. [2021-02-21 16:53:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:53:55,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 499 [2021-02-21 16:53:55,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:53:55,880 INFO L225 Difference]: With dead ends: 73663 [2021-02-21 16:53:55,881 INFO L226 Difference]: Without dead ends: 48801 [2021-02-21 16:53:55,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:53:55,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48801 states. [2021-02-21 16:53:58,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48801 to 48756. [2021-02-21 16:53:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48756 states. [2021-02-21 16:53:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48756 states to 48756 states and 78765 transitions. [2021-02-21 16:53:58,558 INFO L78 Accepts]: Start accepts. Automaton has 48756 states and 78765 transitions. Word has length 499 [2021-02-21 16:53:58,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:53:58,559 INFO L480 AbstractCegarLoop]: Abstraction has 48756 states and 78765 transitions. [2021-02-21 16:53:58,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:53:58,559 INFO L276 IsEmpty]: Start isEmpty. Operand 48756 states and 78765 transitions. [2021-02-21 16:53:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2021-02-21 16:53:58,615 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:53:58,616 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] [2021-02-21 16:53:58,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 16:53:58,616 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:53:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:53:58,617 INFO L82 PathProgramCache]: Analyzing trace with hash -512125470, now seen corresponding path program 1 times [2021-02-21 16:53:58,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:53:58,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26157428] [2021-02-21 16:53:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:53:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:53:58,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:58,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:58,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:58,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:53:58,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:58,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:54:00,172 WARN L202 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:54:00,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:54:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:54:00,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:54:00,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:54:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:54:00,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26157428] [2021-02-21 16:54:00,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:54:00,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:54:00,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220787943] [2021-02-21 16:54:00,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:54:00,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:54:00,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:54:00,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:54:00,889 INFO L87 Difference]: Start difference. First operand 48756 states and 78765 transitions. Second operand 4 states. [2021-02-21 16:54:30,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:54:30,145 INFO L93 Difference]: Finished difference Result 143277 states and 231272 transitions. [2021-02-21 16:54:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:54:30,146 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2021-02-21 16:54:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:54:30,265 INFO L225 Difference]: With dead ends: 143277 [2021-02-21 16:54:30,265 INFO L226 Difference]: Without dead ends: 96063 [2021-02-21 16:54:30,313 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 [2021-02-21 16:54:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96063 states. [2021-02-21 16:54:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96063 to 96022. [2021-02-21 16:54:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96022 states. [2021-02-21 16:54:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96022 states to 96022 states and 154547 transitions. [2021-02-21 16:54:35,444 INFO L78 Accepts]: Start accepts. Automaton has 96022 states and 154547 transitions. Word has length 501 [2021-02-21 16:54:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:54:35,444 INFO L480 AbstractCegarLoop]: Abstraction has 96022 states and 154547 transitions. [2021-02-21 16:54:35,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:54:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 96022 states and 154547 transitions. [2021-02-21 16:54:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-02-21 16:54:35,551 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:54:35,552 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] [2021-02-21 16:54:35,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 16:54:35,552 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:54:35,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:54:35,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2061071050, now seen corresponding path program 1 times [2021-02-21 16:54:35,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:54:35,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739741043] [2021-02-21 16:54:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:54:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:54:36,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:54:36,518 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:54:36,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:54:36,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:54:36,530 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-21 16:54:36,531 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-21 16:54:36,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:54:36,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:54:36,710 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2021-02-21 16:54:36,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:54:36,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:54:37,975 WARN L202 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:54:37,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:54:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:54:38,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:54:38,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:54:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:54:38,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739741043] [2021-02-21 16:54:38,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:54:38,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:54:38,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651941558] [2021-02-21 16:54:38,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:54:38,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:54:38,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:54:38,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:54:38,346 INFO L87 Difference]: Start difference. First operand 96022 states and 154547 transitions. Second operand 6 states. [2021-02-21 16:55:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:55:08,052 INFO L93 Difference]: Finished difference Result 284707 states and 458330 transitions. [2021-02-21 16:55:08,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:55:08,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 503 [2021-02-21 16:55:08,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:55:08,360 INFO L225 Difference]: With dead ends: 284707 [2021-02-21 16:55:08,360 INFO L226 Difference]: Without dead ends: 189022 [2021-02-21 16:55:08,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:55:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189022 states. [2021-02-21 16:55:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189022 to 188989. [2021-02-21 16:55:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188989 states. [2021-02-21 16:55:19,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188989 states to 188989 states and 302949 transitions. [2021-02-21 16:55:19,036 INFO L78 Accepts]: Start accepts. Automaton has 188989 states and 302949 transitions. Word has length 503 [2021-02-21 16:55:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:55:19,036 INFO L480 AbstractCegarLoop]: Abstraction has 188989 states and 302949 transitions. [2021-02-21 16:55:19,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:55:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 188989 states and 302949 transitions. [2021-02-21 16:55:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-02-21 16:55:19,508 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:55:19,509 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] [2021-02-21 16:55:19,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 16:55:19,509 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:55:19,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:55:19,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2033396489, now seen corresponding path program 1 times [2021-02-21 16:55:19,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:55:19,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635022936] [2021-02-21 16:55:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:55:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:55:20,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:55:20,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:55:20,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:55:20,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:55:20,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:55:20,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:55:20,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:55:20,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:55:21,734 WARN L202 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:55:21,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:55:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:55:21,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:55:21,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:55:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:55:22,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635022936] [2021-02-21 16:55:22,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:55:22,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:55:22,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244242334] [2021-02-21 16:55:22,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:55:22,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:55:22,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:55:22,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:55:22,204 INFO L87 Difference]: Start difference. First operand 188989 states and 302949 transitions. Second operand 5 states. [2021-02-21 16:56:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:56:00,818 INFO L93 Difference]: Finished difference Result 561355 states and 899643 transitions. [2021-02-21 16:56:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:56:00,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 505 [2021-02-21 16:56:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:56:01,689 INFO L225 Difference]: With dead ends: 561355 [2021-02-21 16:56:01,689 INFO L226 Difference]: Without dead ends: 373217 [2021-02-21 16:56:01,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:56:02,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373217 states. [2021-02-21 16:56:23,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373217 to 372495. [2021-02-21 16:56:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372495 states. [2021-02-21 16:56:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372495 states to 372495 states and 594727 transitions. [2021-02-21 16:56:24,457 INFO L78 Accepts]: Start accepts. Automaton has 372495 states and 594727 transitions. Word has length 505 [2021-02-21 16:56:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:56:24,457 INFO L480 AbstractCegarLoop]: Abstraction has 372495 states and 594727 transitions. [2021-02-21 16:56:24,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:56:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 372495 states and 594727 transitions. [2021-02-21 16:56:24,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-02-21 16:56:24,821 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:56:24,822 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] [2021-02-21 16:56:24,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 16:56:24,822 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:56:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:56:24,823 INFO L82 PathProgramCache]: Analyzing trace with hash -219530448, now seen corresponding path program 1 times [2021-02-21 16:56:24,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:56:24,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63335566] [2021-02-21 16:56:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:56:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:56:25,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:56:25,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:56:25,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:56:25,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:56:25,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:56:25,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:56:26,956 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:56:26,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:56:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:56:26,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:56:26,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:56:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:56:27,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63335566] [2021-02-21 16:56:27,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:56:27,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:56:27,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292247223] [2021-02-21 16:56:27,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:56:27,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:56:27,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:56:27,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:56:27,393 INFO L87 Difference]: Start difference. First operand 372495 states and 594727 transitions. Second operand 4 states. [2021-02-21 16:57:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:57:35,129 INFO L93 Difference]: Finished difference Result 1101403 states and 1756739 transitions. [2021-02-21 16:57:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:57:35,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2021-02-21 16:57:35,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:57:36,691 INFO L225 Difference]: With dead ends: 1101403 [2021-02-21 16:57:36,691 INFO L226 Difference]: Without dead ends: 736745 [2021-02-21 16:57:37,306 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 [2021-02-21 16:57:37,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736745 states. [2021-02-21 16:58:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736745 to 736023. [2021-02-21 16:58:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736023 states. [2021-02-21 16:58:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736023 states to 736023 states and 1170635 transitions. [2021-02-21 16:58:22,008 INFO L78 Accepts]: Start accepts. Automaton has 736023 states and 1170635 transitions. Word has length 507 [2021-02-21 16:58:22,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:58:22,009 INFO L480 AbstractCegarLoop]: Abstraction has 736023 states and 1170635 transitions. [2021-02-21 16:58:22,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:58:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 736023 states and 1170635 transitions. [2021-02-21 16:58:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-02-21 16:58:23,901 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:58:23,901 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] [2021-02-21 16:58:23,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 16:58:23,902 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:58:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:58:23,903 INFO L82 PathProgramCache]: Analyzing trace with hash -584315946, now seen corresponding path program 1 times [2021-02-21 16:58:23,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:58:23,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364733322] [2021-02-21 16:58:23,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:58:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:58:24,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:58:24,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:58:24,259 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:58:24,260 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:58:24,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:58:24,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:58:26,092 WARN L202 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-21 16:58:26,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:58:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:58:26,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:58:26,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:58:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:58:26,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364733322] [2021-02-21 16:58:26,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:58:26,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:58:26,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185799752] [2021-02-21 16:58:26,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:58:26,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:58:26,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:58:26,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:58:26,486 INFO L87 Difference]: Start difference. First operand 736023 states and 1170635 transitions. Second operand 4 states.