/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 05:18:05,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 05:18:05,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 05:18:05,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 05:18:05,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 05:18:05,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 05:18:05,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 05:18:05,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 05:18:05,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 05:18:05,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 05:18:05,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 05:18:05,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 05:18:05,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 05:18:05,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 05:18:05,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 05:18:05,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 05:18:05,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 05:18:05,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 05:18:05,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 05:18:05,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 05:18:05,926 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 05:18:05,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 05:18:05,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 05:18:05,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 05:18:05,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 05:18:05,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 05:18:05,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 05:18:05,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 05:18:05,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 05:18:05,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 05:18:05,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 05:18:05,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 05:18:05,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 05:18:05,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 05:18:05,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 05:18:05,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 05:18:05,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 05:18:05,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 05:18:05,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 05:18:05,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 05:18:05,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 05:18:05,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 05:18:05,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 05:18:05,974 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 05:18:05,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 05:18:05,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 05:18:05,982 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 05:18:05,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 05:18:05,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 05:18:05,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 05:18:05,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 05:18:05,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 05:18:05,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 05:18:05,984 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 05:18:05,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 05:18:05,984 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 05:18:05,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 05:18:05,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 05:18:05,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 05:18:05,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 05:18:05,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 05:18:05,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 05:18:05,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 05:18:05,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 05:18:05,986 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 05:18:05,987 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 05:18:06,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 05:18:06,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 05:18:06,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 05:18:06,285 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 05:18:06,286 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 05:18:06,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-04-06 05:18:06,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41fd4113d/c956e7d894134c989fab8c0debd75818/FLAG06c208d24 [2022-04-06 05:18:06,824 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 05:18:06,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-04-06 05:18:06,832 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41fd4113d/c956e7d894134c989fab8c0debd75818/FLAG06c208d24 [2022-04-06 05:18:07,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41fd4113d/c956e7d894134c989fab8c0debd75818 [2022-04-06 05:18:07,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 05:18:07,219 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 05:18:07,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 05:18:07,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 05:18:07,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 05:18:07,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:18:07" (1/1) ... [2022-04-06 05:18:07,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53ea23dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:18:07, skipping insertion in model container [2022-04-06 05:18:07,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:18:07" (1/1) ... [2022-04-06 05:18:07,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 05:18:07,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 05:18:07,391 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c[318,331] [2022-04-06 05:18:07,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 05:18:07,442 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 05:18:07,452 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c[318,331] [2022-04-06 05:18:07,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 05:18:07,467 INFO L208 MainTranslator]: Completed translation [2022-04-06 05:18:07,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:18:07 WrapperNode [2022-04-06 05:18:07,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 05:18:07,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 05:18:07,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 05:18:07,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 05:18:07,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:18:07" (1/1) ... [2022-04-06 05:18:07,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:18:07" (1/1) ... [2022-04-06 05:18:07,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:18:07" (1/1) ... [2022-04-06 05:18:07,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:18:07" (1/1) ... [2022-04-06 05:18:07,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:18:07" (1/1) ... [2022-04-06 05:18:07,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:18:07" (1/1) ... [2022-04-06 05:18:07,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:18:07" (1/1) ... [2022-04-06 05:18:07,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 05:18:07,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 05:18:07,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 05:18:07,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 05:18:07,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:18:07" (1/1) ... [2022-04-06 05:18:07,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 05:18:07,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:18:07,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 05:18:07,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 05:18:07,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 05:18:07,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 05:18:07,583 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 05:18:07,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 05:18:07,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 05:18:07,583 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 05:18:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 05:18:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 05:18:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 05:18:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 05:18:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 05:18:07,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 05:18:07,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 05:18:07,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 05:18:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 05:18:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 05:18:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 05:18:07,656 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 05:18:07,658 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 05:18:07,820 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 05:18:07,825 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 05:18:07,825 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 05:18:07,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:18:07 BoogieIcfgContainer [2022-04-06 05:18:07,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 05:18:07,828 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 05:18:07,828 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 05:18:07,844 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 05:18:07,847 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:18:07" (1/1) ... [2022-04-06 05:18:07,853 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 05:18:08,112 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 05:18:08,113 INFO L91 elerationTransformer]: Accelerated Formula: (and (= v_main_~x~0_3 (+ v_main_~x~0_2 1)) (= (+ v_main_~y~0_1 1) v_main_~y~0_2) (< v_main_~z~0_1 v_main_~y~0_2)) InVars {main_~x~0=v_main_~x~0_3, main_~z~0=v_main_~z~0_1, main_~y~0=v_main_~y~0_2} OutVars{main_~x~0=v_main_~x~0_2, main_~z~0=v_main_~z~0_1, main_~y~0=v_main_~y~0_1, main_#t~post8=|v_main_#t~post8_1|, main_#t~post7=|v_main_#t~post7_1|} AuxVars[] AssignedVars[main_~x~0, main_~y~0, main_#t~post8, main_#t~post7] to Formula: (or (and (<= v_main_~y~0_2 v_main_~z~0_1) (= v_main_~y~0_2 v_main_~y~0_1) (= v_main_~x~0_3 v_main_~x~0_2) (= |v_main_#t~post7_3| |v_main_#t~post7_1|) (= |v_main_#t~post8_3| |v_main_#t~post8_1|)) (and (< (+ v_main_~x~0_3 v_main_~z~0_1) (+ v_main_~x~0_2 v_main_~y~0_2 1)) (= (+ v_main_~x~0_2 v_main_~y~0_2) (+ v_main_~x~0_3 v_main_~y~0_1)) (< v_main_~x~0_2 v_main_~x~0_3))) InVars {main_~y~0=v_main_~y~0_2, main_~x~0=v_main_~x~0_3, main_#t~post8=|v_main_#t~post8_3|, main_~z~0=v_main_~z~0_1, main_#t~post7=|v_main_#t~post7_3|} OutVars{main_~y~0=v_main_~y~0_1, main_~x~0=v_main_~x~0_2, main_#t~post8=|v_main_#t~post8_1|, main_~z~0=v_main_~z~0_1, main_#t~post7=|v_main_#t~post7_1|} AuxVars[] AssignedVars[main_~x~0, main_~y~0, main_#t~post8, main_#t~post7] [2022-04-06 05:18:08,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 05:18:08 BasicIcfg [2022-04-06 05:18:08,118 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 05:18:08,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 05:18:08,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 05:18:08,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 05:18:08,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 05:18:07" (1/4) ... [2022-04-06 05:18:08,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7404d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:18:08, skipping insertion in model container [2022-04-06 05:18:08,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:18:07" (2/4) ... [2022-04-06 05:18:08,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7404d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:18:08, skipping insertion in model container [2022-04-06 05:18:08,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:18:07" (3/4) ... [2022-04-06 05:18:08,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7404d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 05:18:08, skipping insertion in model container [2022-04-06 05:18:08,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 05:18:08" (4/4) ... [2022-04-06 05:18:08,128 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.cJordan [2022-04-06 05:18:08,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 05:18:08,133 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 05:18:08,177 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 05:18:08,185 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 05:18:08,186 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 05:18:08,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 05:18:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 05:18:08,206 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:18:08,207 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:18:08,208 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:18:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:18:08,214 INFO L85 PathProgramCache]: Analyzing trace with hash 164364990, now seen corresponding path program 1 times [2022-04-06 05:18:08,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:18:08,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249333546] [2022-04-06 05:18:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:08,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:18:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:08,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:18:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:18:08,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:18:08,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249333546] [2022-04-06 05:18:08,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249333546] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:18:08,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:18:08,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 05:18:08,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821439507] [2022-04-06 05:18:08,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:18:08,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 05:18:08,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:18:08,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 05:18:08,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 05:18:08,388 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:08,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:18:08,423 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-04-06 05:18:08,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 05:18:08,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 05:18:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:18:08,443 INFO L225 Difference]: With dead ends: 21 [2022-04-06 05:18:08,443 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 05:18:08,444 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 05:18:08,451 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:18:08,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 05:18:08,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 05:18:08,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 05:18:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-04-06 05:18:08,483 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-04-06 05:18:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:18:08,483 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-04-06 05:18:08,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-04-06 05:18:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 05:18:08,485 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:18:08,485 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:18:08,485 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 05:18:08,486 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:18:08,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:18:08,489 INFO L85 PathProgramCache]: Analyzing trace with hash 165288511, now seen corresponding path program 1 times [2022-04-06 05:18:08,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:18:08,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913923448] [2022-04-06 05:18:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:08,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:18:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:08,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:18:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:18:08,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:18:08,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913923448] [2022-04-06 05:18:08,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913923448] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:18:08,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:18:08,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 05:18:08,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009799935] [2022-04-06 05:18:08,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:18:08,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 05:18:08,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:18:08,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 05:18:08,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 05:18:08,566 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:18:08,631 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-04-06 05:18:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 05:18:08,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 05:18:08,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:18:08,633 INFO L225 Difference]: With dead ends: 16 [2022-04-06 05:18:08,634 INFO L226 Difference]: Without dead ends: 16 [2022-04-06 05:18:08,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 05:18:08,635 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:18:08,636 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 05:18:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-06 05:18:08,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-04-06 05:18:08,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-04-06 05:18:08,640 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-04-06 05:18:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:18:08,640 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-04-06 05:18:08,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-04-06 05:18:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 05:18:08,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:18:08,641 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:18:08,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 05:18:08,642 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:18:08,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:18:08,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1054746269, now seen corresponding path program 1 times [2022-04-06 05:18:08,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:18:08,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933916995] [2022-04-06 05:18:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:08,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:18:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:08,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:18:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 05:18:08,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:18:08,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933916995] [2022-04-06 05:18:08,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933916995] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:18:08,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:18:08,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 05:18:08,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963900767] [2022-04-06 05:18:08,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:18:08,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 05:18:08,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:18:08,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 05:18:08,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 05:18:08,746 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:18:08,783 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-04-06 05:18:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 05:18:08,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 05:18:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:18:08,785 INFO L225 Difference]: With dead ends: 17 [2022-04-06 05:18:08,786 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 05:18:08,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 05:18:08,793 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:18:08,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 05:18:08,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 05:18:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 05:18:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-06 05:18:08,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-04-06 05:18:08,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:18:08,802 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-06 05:18:08,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-06 05:18:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 05:18:08,803 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:18:08,804 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:18:08,804 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 05:18:08,804 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:18:08,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:18:08,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1687477607, now seen corresponding path program 1 times [2022-04-06 05:18:08,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:18:08,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861754437] [2022-04-06 05:18:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:08,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:18:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:08,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:18:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 05:18:08,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:18:08,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861754437] [2022-04-06 05:18:08,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861754437] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:18:08,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701168395] [2022-04-06 05:18:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:08,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:08,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:18:08,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:18:08,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 05:18:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:08,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 05:18:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:18:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 05:18:08,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:18:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 05:18:09,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701168395] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:18:09,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:18:09,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 05:18:09,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137960658] [2022-04-06 05:18:09,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:18:09,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 05:18:09,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:18:09,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 05:18:09,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 05:18:09,060 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:18:09,144 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-04-06 05:18:09,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 05:18:09,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 05:18:09,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:18:09,145 INFO L225 Difference]: With dead ends: 22 [2022-04-06 05:18:09,145 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 05:18:09,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-04-06 05:18:09,153 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:18:09,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 05:18:09,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 05:18:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 05:18:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-04-06 05:18:09,162 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2022-04-06 05:18:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:18:09,163 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-04-06 05:18:09,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-04-06 05:18:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 05:18:09,166 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:18:09,166 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:18:09,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 05:18:09,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:09,392 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:18:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:18:09,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1507884679, now seen corresponding path program 1 times [2022-04-06 05:18:09,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:18:09,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267397] [2022-04-06 05:18:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:09,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:18:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:09,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:18:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 05:18:09,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:18:09,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267397] [2022-04-06 05:18:09,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267397] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:18:09,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355241075] [2022-04-06 05:18:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:09,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:09,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:18:09,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:18:09,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 05:18:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:09,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 05:18:09,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:18:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 05:18:09,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:18:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 05:18:09,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355241075] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:18:09,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:18:09,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 05:18:09,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979292662] [2022-04-06 05:18:09,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:18:09,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 05:18:09,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:18:09,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 05:18:09,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 05:18:09,620 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:18:09,706 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-04-06 05:18:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 05:18:09,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 05:18:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:18:09,707 INFO L225 Difference]: With dead ends: 30 [2022-04-06 05:18:09,707 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 05:18:09,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-04-06 05:18:09,708 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:18:09,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 31 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 05:18:09,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 05:18:09,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 05:18:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-04-06 05:18:09,712 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-04-06 05:18:09,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:18:09,713 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-04-06 05:18:09,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-04-06 05:18:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 05:18:09,714 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:18:09,714 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:18:09,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 05:18:09,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:09,928 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:18:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:18:09,928 INFO L85 PathProgramCache]: Analyzing trace with hash 163921129, now seen corresponding path program 2 times [2022-04-06 05:18:09,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:18:09,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133354045] [2022-04-06 05:18:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:09,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:18:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:10,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:18:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 05:18:10,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:18:10,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133354045] [2022-04-06 05:18:10,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133354045] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:18:10,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276026017] [2022-04-06 05:18:10,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 05:18:10,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:10,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:18:10,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:18:10,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 05:18:10,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 05:18:10,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:18:10,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 05:18:10,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:18:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 05:18:10,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:18:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 05:18:10,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276026017] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:18:10,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:18:10,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 05:18:10,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898941197] [2022-04-06 05:18:10,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:18:10,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 05:18:10,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:18:10,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 05:18:10,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 05:18:10,342 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:18:10,553 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-04-06 05:18:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 05:18:10,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 05:18:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:18:10,555 INFO L225 Difference]: With dead ends: 46 [2022-04-06 05:18:10,555 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 05:18:10,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-04-06 05:18:10,557 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 05:18:10,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 31 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 05:18:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 05:18:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 05:18:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:10,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-04-06 05:18:10,576 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2022-04-06 05:18:10,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:18:10,577 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-04-06 05:18:10,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:10,577 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-04-06 05:18:10,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 05:18:10,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:18:10,578 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:18:10,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 05:18:10,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:10,788 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:18:10,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:18:10,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1399757879, now seen corresponding path program 3 times [2022-04-06 05:18:10,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:18:10,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667882786] [2022-04-06 05:18:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:10,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:18:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:11,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:18:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 05:18:11,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:18:11,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667882786] [2022-04-06 05:18:11,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667882786] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:18:11,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796746706] [2022-04-06 05:18:11,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 05:18:11,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:11,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:18:11,028 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:18:11,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 05:18:11,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-06 05:18:11,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:18:11,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 05:18:11,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:18:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-04-06 05:18:11,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:18:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-04-06 05:18:11,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796746706] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:18:11,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:18:11,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-04-06 05:18:11,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609527804] [2022-04-06 05:18:11,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:18:11,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 05:18:11,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:18:11,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 05:18:11,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-04-06 05:18:11,349 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:11,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:18:11,776 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-04-06 05:18:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 05:18:11,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 05:18:11,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:18:11,780 INFO L225 Difference]: With dead ends: 56 [2022-04-06 05:18:11,780 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 05:18:11,783 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 05:18:11,784 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 05:18:11,784 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 35 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 05:18:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 05:18:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 05:18:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-04-06 05:18:11,792 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 45 [2022-04-06 05:18:11,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:18:11,793 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-04-06 05:18:11,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-04-06 05:18:11,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 05:18:11,797 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:18:11,797 INFO L499 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:18:11,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 05:18:12,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:12,012 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:18:12,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:18:12,012 INFO L85 PathProgramCache]: Analyzing trace with hash -809396335, now seen corresponding path program 4 times [2022-04-06 05:18:12,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:18:12,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674353786] [2022-04-06 05:18:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:12,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:18:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:12,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:18:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 05:18:12,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:18:12,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674353786] [2022-04-06 05:18:12,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674353786] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:18:12,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978871486] [2022-04-06 05:18:12,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 05:18:12,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:12,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:18:12,202 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:18:12,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 05:18:12,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 05:18:12,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:18:12,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 05:18:12,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:18:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 05:18:12,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:18:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 05:18:12,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978871486] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:18:12,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:18:12,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 05:18:12,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308015172] [2022-04-06 05:18:12,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:18:12,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 05:18:12,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:18:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 05:18:12,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 05:18:12,778 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:18:13,426 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-04-06 05:18:13,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 05:18:13,426 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 05:18:13,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:18:13,427 INFO L225 Difference]: With dead ends: 90 [2022-04-06 05:18:13,427 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 05:18:13,431 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 05:18:13,432 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 05:18:13,432 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 05:18:13,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 05:18:13,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-04-06 05:18:13,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 85 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:13,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2022-04-06 05:18:13,438 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 55 [2022-04-06 05:18:13,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:18:13,438 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2022-04-06 05:18:13,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:13,439 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2022-04-06 05:18:13,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 05:18:13,440 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:18:13,440 INFO L499 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:18:13,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 05:18:13,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:13,648 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:18:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:18:13,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1122744237, now seen corresponding path program 5 times [2022-04-06 05:18:13,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:18:13,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073053874] [2022-04-06 05:18:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:13,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:18:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:14,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:18:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 05:18:14,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:18:14,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073053874] [2022-04-06 05:18:14,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073053874] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:18:14,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525369960] [2022-04-06 05:18:14,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 05:18:14,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:14,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:18:14,174 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:18:14,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 05:18:14,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-04-06 05:18:14,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:18:14,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 05:18:14,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:18:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 05:18:14,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:18:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 05:18:15,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525369960] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:18:15,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:18:15,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 05:18:15,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861013883] [2022-04-06 05:18:15,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:18:15,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 05:18:15,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:18:15,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 05:18:15,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 05:18:15,905 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:18:17,882 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2022-04-06 05:18:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 05:18:17,883 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 05:18:17,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:18:17,883 INFO L225 Difference]: With dead ends: 158 [2022-04-06 05:18:17,883 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 05:18:17,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 05:18:17,891 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 05:18:17,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 41 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 05:18:17,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 05:18:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-04-06 05:18:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0522875816993464) internal successors, (161), 153 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2022-04-06 05:18:17,899 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 89 [2022-04-06 05:18:17,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:18:17,900 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2022-04-06 05:18:17,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:17,900 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2022-04-06 05:18:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 05:18:17,901 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:18:17,902 INFO L499 BasicCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:18:17,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 05:18:18,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:18,116 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:18:18,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:18:18,116 INFO L85 PathProgramCache]: Analyzing trace with hash -666328347, now seen corresponding path program 6 times [2022-04-06 05:18:18,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:18:18,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120347778] [2022-04-06 05:18:18,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:18,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:18:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:19,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:18:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 05:18:19,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:18:19,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120347778] [2022-04-06 05:18:19,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120347778] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:18:19,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27303847] [2022-04-06 05:18:19,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 05:18:19,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:19,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:18:19,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:18:19,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 05:18:19,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-04-06 05:18:19,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:18:19,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 05:18:19,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:18:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-04-06 05:18:20,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:18:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-04-06 05:18:20,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27303847] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:18:20,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:18:20,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 9, 9] total 84 [2022-04-06 05:18:20,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250691905] [2022-04-06 05:18:20,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:18:20,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 05:18:20,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:18:20,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 05:18:20,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 05:18:20,797 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:23,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:18:23,489 INFO L93 Difference]: Finished difference Result 176 states and 191 transitions. [2022-04-06 05:18:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 05:18:23,490 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-04-06 05:18:23,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:18:23,491 INFO L225 Difference]: With dead ends: 176 [2022-04-06 05:18:23,491 INFO L226 Difference]: Without dead ends: 176 [2022-04-06 05:18:23,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-04-06 05:18:23,497 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 170 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 05:18:23,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 55 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 05:18:23,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-06 05:18:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-04-06 05:18:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0935672514619883) internal successors, (187), 171 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 191 transitions. [2022-04-06 05:18:23,505 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 191 transitions. Word has length 157 [2022-04-06 05:18:23,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:18:23,505 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 191 transitions. [2022-04-06 05:18:23,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 191 transitions. [2022-04-06 05:18:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 05:18:23,508 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:18:23,508 INFO L499 BasicCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:18:23,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 05:18:23,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:23,720 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:18:23,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:18:23,720 INFO L85 PathProgramCache]: Analyzing trace with hash -28776167, now seen corresponding path program 7 times [2022-04-06 05:18:23,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:18:23,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565157153] [2022-04-06 05:18:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:23,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:18:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:25,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:18:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-04-06 05:18:25,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:18:25,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565157153] [2022-04-06 05:18:25,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565157153] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:18:25,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697109009] [2022-04-06 05:18:25,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 05:18:25,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:25,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:18:25,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:18:25,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 05:18:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:25,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 05:18:25,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:18:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-04-06 05:18:25,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:18:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-04-06 05:18:30,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697109009] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:18:30,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:18:30,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-04-06 05:18:30,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198290839] [2022-04-06 05:18:30,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:18:30,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-04-06 05:18:30,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:18:30,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-04-06 05:18:30,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 05:18:30,032 INFO L87 Difference]: Start difference. First operand 176 states and 191 transitions. Second operand has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:36,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:18:36,284 INFO L93 Difference]: Finished difference Result 314 states and 329 transitions. [2022-04-06 05:18:36,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-04-06 05:18:36,284 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-04-06 05:18:36,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:18:36,286 INFO L225 Difference]: With dead ends: 314 [2022-04-06 05:18:36,286 INFO L226 Difference]: Without dead ends: 314 [2022-04-06 05:18:36,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-04-06 05:18:36,292 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 05:18:36,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 36 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 05:18:36,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-04-06 05:18:36,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2022-04-06 05:18:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.051779935275081) internal successors, (325), 309 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 329 transitions. [2022-04-06 05:18:36,302 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 329 transitions. Word has length 175 [2022-04-06 05:18:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:18:36,303 INFO L478 AbstractCegarLoop]: Abstraction has 314 states and 329 transitions. [2022-04-06 05:18:36,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:18:36,303 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 329 transitions. [2022-04-06 05:18:36,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-04-06 05:18:36,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:18:36,307 INFO L499 BasicCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:18:36,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 05:18:36,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 05:18:36,524 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:18:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:18:36,524 INFO L85 PathProgramCache]: Analyzing trace with hash 270983653, now seen corresponding path program 8 times [2022-04-06 05:18:36,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:18:36,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170771790] [2022-04-06 05:18:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:18:36,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:18:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:42,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:18:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:18:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-04-06 05:18:42,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:18:42,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170771790] [2022-04-06 05:18:42,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170771790] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:18:42,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625286937] [2022-04-06 05:18:42,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 05:18:42,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:18:42,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:18:42,272 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:18:42,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 05:18:42,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 05:18:42,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:18:42,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 138 conjunts are in the unsatisfiable core [2022-04-06 05:18:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:18:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-04-06 05:18:43,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:18:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-04-06 05:18:59,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625286937] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:18:59,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:18:59,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-04-06 05:18:59,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498899685] [2022-04-06 05:18:59,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:18:59,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-04-06 05:18:59,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:18:59,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-04-06 05:18:59,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-04-06 05:18:59,224 INFO L87 Difference]: Start difference. First operand 314 states and 329 transitions. Second operand has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:19:22,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:19:22,992 INFO L93 Difference]: Finished difference Result 590 states and 605 transitions. [2022-04-06 05:19:22,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-04-06 05:19:22,993 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-04-06 05:19:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:19:22,995 INFO L225 Difference]: With dead ends: 590 [2022-04-06 05:19:22,995 INFO L226 Difference]: Without dead ends: 590 [2022-04-06 05:19:23,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-04-06 05:19:23,013 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 284 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 05:19:23,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 36 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 05:19:23,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-04-06 05:19:23,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2022-04-06 05:19:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 585 states have (on average 1.0273504273504273) internal successors, (601), 585 states have internal predecessors, (601), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:19:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 605 transitions. [2022-04-06 05:19:23,026 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 605 transitions. Word has length 313 [2022-04-06 05:19:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:19:23,027 INFO L478 AbstractCegarLoop]: Abstraction has 590 states and 605 transitions. [2022-04-06 05:19:23,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:19:23,028 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 605 transitions. [2022-04-06 05:19:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2022-04-06 05:19:23,037 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:19:23,037 INFO L499 BasicCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:19:23,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 05:19:23,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:19:23,259 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:19:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:19:23,260 INFO L85 PathProgramCache]: Analyzing trace with hash -404183427, now seen corresponding path program 9 times [2022-04-06 05:19:23,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:19:23,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620692210] [2022-04-06 05:19:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:19:23,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:19:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:19:45,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:19:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:19:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-04-06 05:19:45,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:19:45,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620692210] [2022-04-06 05:19:45,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620692210] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:19:45,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231798820] [2022-04-06 05:19:45,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 05:19:45,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:19:45,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:19:45,196 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:19:45,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 05:19:45,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-04-06 05:19:45,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:19:45,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 05:19:45,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:19:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-04-06 05:19:48,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:19:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-04-06 05:19:51,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231798820] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:19:51,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:19:51,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 17, 17] total 308 [2022-04-06 05:19:51,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210663596] [2022-04-06 05:19:51,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:19:51,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 308 states [2022-04-06 05:19:51,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:19:51,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 308 interpolants. [2022-04-06 05:19:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46973, Invalid=47583, Unknown=0, NotChecked=0, Total=94556 [2022-04-06 05:19:51,439 INFO L87 Difference]: Start difference. First operand 590 states and 605 transitions. Second operand has 308 states, 308 states have (on average 2.029220779220779) internal successors, (625), 307 states have internal predecessors, (625), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:20:25,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:20:25,831 INFO L93 Difference]: Finished difference Result 624 states and 655 transitions. [2022-04-06 05:20:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-04-06 05:20:25,832 INFO L78 Accepts]: Start accepts. Automaton has has 308 states, 308 states have (on average 2.029220779220779) internal successors, (625), 307 states have internal predecessors, (625), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 589 [2022-04-06 05:20:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:20:25,835 INFO L225 Difference]: With dead ends: 624 [2022-04-06 05:20:25,835 INFO L226 Difference]: Without dead ends: 624 [2022-04-06 05:20:25,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1790 GetRequests, 1179 SyntacticMatches, 0 SemanticMatches, 611 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46725 ImplicationChecksByTransitivity, 56.0s TimeCoverageRelationStatistics Valid=140913, Invalid=234243, Unknown=0, NotChecked=0, Total=375156 [2022-04-06 05:20:25,886 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 908 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 1580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1580 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:20:25,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 40 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1580 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 05:20:25,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-04-06 05:20:25,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2022-04-06 05:20:25,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 619 states have (on average 1.0516962843295639) internal successors, (651), 619 states have internal predecessors, (651), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:20:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 655 transitions. [2022-04-06 05:20:25,897 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 655 transitions. Word has length 589 [2022-04-06 05:20:25,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:20:25,898 INFO L478 AbstractCegarLoop]: Abstraction has 624 states and 655 transitions. [2022-04-06 05:20:25,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 308 states, 308 states have (on average 2.029220779220779) internal successors, (625), 307 states have internal predecessors, (625), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:20:25,898 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 655 transitions. [2022-04-06 05:20:25,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2022-04-06 05:20:25,909 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:20:25,910 INFO L499 BasicCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:20:25,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 05:20:26,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 05:20:26,128 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:20:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:20:26,128 INFO L85 PathProgramCache]: Analyzing trace with hash -876081783, now seen corresponding path program 10 times [2022-04-06 05:20:26,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:20:26,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548043532] [2022-04-06 05:20:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:20:26,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:20:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:20:48,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:20:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:20:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-04-06 05:20:48,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:20:48,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548043532] [2022-04-06 05:20:48,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548043532] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:20:48,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135905297] [2022-04-06 05:20:48,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 05:20:48,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:20:48,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:20:48,511 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:20:48,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 05:20:48,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 05:20:48,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:20:48,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 277 conjunts are in the unsatisfiable core [2022-04-06 05:20:48,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:20:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-04-06 05:20:49,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:21:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-04-06 05:21:57,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135905297] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:21:57,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:21:57,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-04-06 05:21:57,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844286608] [2022-04-06 05:21:57,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:21:57,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-04-06 05:21:57,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:21:57,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-04-06 05:21:57,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-04-06 05:21:57,172 INFO L87 Difference]: Start difference. First operand 624 states and 655 transitions. Second operand has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:23:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:23:37,780 INFO L93 Difference]: Finished difference Result 1178 states and 1209 transitions. [2022-04-06 05:23:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-04-06 05:23:37,782 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 623 [2022-04-06 05:23:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:23:37,787 INFO L225 Difference]: With dead ends: 1178 [2022-04-06 05:23:37,787 INFO L226 Difference]: Without dead ends: 1178 [2022-04-06 05:23:37,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2077 GetRequests, 971 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 180.3s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-04-06 05:23:37,884 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 562 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 05:23:37,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 61 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 05:23:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-04-06 05:23:37,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1178. [2022-04-06 05:23:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1173 states have (on average 1.0272804774083546) internal successors, (1205), 1173 states have internal predecessors, (1205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:23:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1209 transitions. [2022-04-06 05:23:37,905 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1209 transitions. Word has length 623 [2022-04-06 05:23:37,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:23:37,906 INFO L478 AbstractCegarLoop]: Abstraction has 1178 states and 1209 transitions. [2022-04-06 05:23:37,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:23:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1209 transitions. [2022-04-06 05:23:37,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1178 [2022-04-06 05:23:37,919 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:23:37,919 INFO L499 BasicCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:23:37,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 05:23:38,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 05:23:38,144 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:23:38,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:23:38,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1533344021, now seen corresponding path program 11 times [2022-04-06 05:23:38,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:23:38,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117879115] [2022-04-06 05:23:38,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:23:38,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:23:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:25:11,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:25:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:25:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-04-06 05:25:11,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:25:11,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117879115] [2022-04-06 05:25:11,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117879115] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:25:11,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078768255] [2022-04-06 05:25:11,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 05:25:11,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:25:11,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:25:11,380 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:25:11,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 05:25:14,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-04-06 05:25:14,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:25:14,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 2445 conjuncts, 554 conjunts are in the unsatisfiable core [2022-04-06 05:25:14,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:25:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-04-06 05:25:16,411 INFO L328 TraceCheckSpWp]: Computing backward predicates...