/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_14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 17:45:25,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 17:45:25,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 17:45:25,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 17:45:25,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 17:45:25,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 17:45:25,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 17:45:25,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 17:45:25,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 17:45:25,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 17:45:25,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 17:45:25,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 17:45:25,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 17:45:25,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 17:45:25,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 17:45:25,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 17:45:25,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 17:45:25,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 17:45:25,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 17:45:25,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 17:45:25,966 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 17:45:25,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 17:45:25,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 17:45:25,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 17:45:25,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 17:45:25,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 17:45:25,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 17:45:25,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 17:45:25,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 17:45:25,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 17:45:25,996 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 17:45:25,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 17:45:25,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 17:45:25,999 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 17:45:25,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 17:45:25,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 17:45:25,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 17:45:25,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 17:45:25,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 17:45:26,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 17:45:26,000 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 17:45:26,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 17:45:26,000 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 17:45:26,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 17:45:26,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 17:45:26,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 17:45:26,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 17:45:26,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 17:45:26,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:45:26,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 17:45:26,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 17:45:26,002 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 17:45:26,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 17:45:26,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 17:45:26,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 17:45:26,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 17:45:26,249 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 17:45:26,250 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 17:45:26,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-03-18 17:45:26,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed287c457/1f86eacc7dc24cc295951bbfbc7e2f2a/FLAG83e2cbcfd [2022-03-18 17:45:26,679 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 17:45:26,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-03-18 17:45:26,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed287c457/1f86eacc7dc24cc295951bbfbc7e2f2a/FLAG83e2cbcfd [2022-03-18 17:45:26,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed287c457/1f86eacc7dc24cc295951bbfbc7e2f2a [2022-03-18 17:45:26,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 17:45:26,696 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 17:45:26,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 17:45:26,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 17:45:26,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 17:45:26,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:45:26" (1/1) ... [2022-03-18 17:45:26,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba1c6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:45:26, skipping insertion in model container [2022-03-18 17:45:26,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:45:26" (1/1) ... [2022-03-18 17:45:26,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 17:45:26,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 17:45:26,845 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_14.c[319,332] [2022-03-18 17:45:26,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:45:26,883 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 17:45:26,891 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_14.c[319,332] [2022-03-18 17:45:26,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:45:26,903 INFO L208 MainTranslator]: Completed translation [2022-03-18 17:45:26,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:45:26 WrapperNode [2022-03-18 17:45:26,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 17:45:26,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 17:45:26,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 17:45:26,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 17:45:26,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:45:26" (1/1) ... [2022-03-18 17:45:26,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:45:26" (1/1) ... [2022-03-18 17:45:26,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:45:26" (1/1) ... [2022-03-18 17:45:26,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:45:26" (1/1) ... [2022-03-18 17:45:26,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:45:26" (1/1) ... [2022-03-18 17:45:26,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:45:26" (1/1) ... [2022-03-18 17:45:26,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:45:26" (1/1) ... [2022-03-18 17:45:26,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 17:45:26,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 17:45:26,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 17:45:26,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 17:45:26,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:45:26" (1/1) ... [2022-03-18 17:45:26,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:45:26,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:45:26,976 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) [2022-03-18 17:45:27,001 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 [2022-03-18 17:45:27,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 17:45:27,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 17:45:27,021 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 17:45:27,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 17:45:27,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 17:45:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 17:45:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 17:45:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 17:45:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 17:45:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 17:45:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 17:45:27,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 17:45:27,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 17:45:27,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 17:45:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 17:45:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 17:45:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 17:45:27,086 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 17:45:27,087 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 17:45:27,161 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 17:45:27,165 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 17:45:27,166 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 17:45:27,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:45:27 BoogieIcfgContainer [2022-03-18 17:45:27,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 17:45:27,168 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 17:45:27,168 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 17:45:27,169 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 17:45:27,171 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:45:27" (1/1) ... [2022-03-18 17:45:27,407 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-18 17:45:27,407 INFO L91 elerationTransformer]: Accelerated Formula: (and (= v_main_~z~0_1 (+ v_main_~z~0_2 1)) (= (+ v_main_~x~0_1 1) v_main_~x~0_2) (< 0 v_main_~y~0_2) (= (+ (- 2) v_main_~y~0_2) v_main_~y~0_1)) InVars {main_~x~0=v_main_~x~0_2, main_~z~0=v_main_~z~0_2, main_~y~0=v_main_~y~0_2} OutVars{main_~x~0=v_main_~x~0_1, 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_~z~0, main_~y~0, main_#t~post8, main_#t~post7] to Formula: (or (and (= v_main_~z~0_2 v_main_~z~0_1) (= v_main_~y~0_2 v_main_~y~0_1) (not (< 0 v_main_~y~0_2)) (= v_main_~x~0_2 v_main_~x~0_1) (= |v_main_#t~post7_3| |v_main_#t~post7_1|) (= |v_main_#t~post8_3| |v_main_#t~post8_1|)) (and (< v_main_~z~0_2 v_main_~z~0_1) (< v_main_~z~0_1 (+ (div (+ (- 1) v_main_~y~0_2) 2) v_main_~z~0_2 2)) (= (+ v_main_~y~0_2 (* v_main_~z~0_2 2)) (+ v_main_~y~0_1 (* v_main_~z~0_1 2))) (= (+ v_main_~x~0_1 v_main_~z~0_1) (+ v_main_~x~0_2 v_main_~z~0_2)))) InVars {main_~y~0=v_main_~y~0_2, main_~x~0=v_main_~x~0_2, main_#t~post8=|v_main_#t~post8_3|, main_~z~0=v_main_~z~0_2, main_#t~post7=|v_main_#t~post7_3|} OutVars{main_~y~0=v_main_~y~0_1, main_~x~0=v_main_~x~0_1, 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_~z~0, main_~y~0, main_#t~post8, main_#t~post7] [2022-03-18 17:45:27,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:45:27 BasicIcfg [2022-03-18 17:45:27,413 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 17:45:27,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 17:45:27,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 17:45:27,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 17:45:27,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:45:26" (1/4) ... [2022-03-18 17:45:27,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c255f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:45:27, skipping insertion in model container [2022-03-18 17:45:27,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:45:26" (2/4) ... [2022-03-18 17:45:27,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c255f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:45:27, skipping insertion in model container [2022-03-18 17:45:27,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:45:27" (3/4) ... [2022-03-18 17:45:27,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c255f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:45:27, skipping insertion in model container [2022-03-18 17:45:27,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:45:27" (4/4) ... [2022-03-18 17:45:27,427 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.cJordan [2022-03-18 17:45:27,430 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 17:45:27,430 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 17:45:27,456 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 17:45:27,462 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 [2022-03-18 17:45:27,462 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 17:45:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 17:45:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 17:45:27,477 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:45:27,477 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:45:27,478 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:45:27,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:45:27,481 INFO L85 PathProgramCache]: Analyzing trace with hash -412568735, now seen corresponding path program 1 times [2022-03-18 17:45:27,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:45:27,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133960125] [2022-03-18 17:45:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:27,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:45:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:27,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:45:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:45:27,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:45:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133960125] [2022-03-18 17:45:27,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133960125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:45:27,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:45:27,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 17:45:27,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495684365] [2022-03-18 17:45:27,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:45:27,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 17:45:27,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:45:27,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 17:45:27,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:45:27,625 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2022-03-18 17:45:27,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:45:27,653 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-03-18 17:45:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 17:45:27,660 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 [2022-03-18 17:45:27,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:45:27,665 INFO L225 Difference]: With dead ends: 22 [2022-03-18 17:45:27,665 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 17:45:27,667 INFO L911 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 [2022-03-18 17:45:27,669 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:45:27,670 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:45:27,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 17:45:27,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 17:45:27,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:45:27,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-03-18 17:45:27,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-03-18 17:45:27,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:45:27,709 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-03-18 17:45:27,709 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) [2022-03-18 17:45:27,709 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-03-18 17:45:27,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 17:45:27,709 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:45:27,710 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:45:27,710 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 17:45:27,710 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:45:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:45:27,711 INFO L85 PathProgramCache]: Analyzing trace with hash -383016063, now seen corresponding path program 1 times [2022-03-18 17:45:27,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:45:27,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403367560] [2022-03-18 17:45:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:27,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:45:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:27,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:45:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:45:27,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:45:27,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403367560] [2022-03-18 17:45:27,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403367560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:45:27,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:45:27,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 17:45:27,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2860425] [2022-03-18 17:45:27,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:45:27,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 17:45:27,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:45:27,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 17:45:27,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 17:45:27,781 INFO L87 Difference]: Start difference. First operand 17 states and 20 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) [2022-03-18 17:45:27,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:45:27,835 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-03-18 17:45:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 17:45:27,836 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 [2022-03-18 17:45:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:45:27,838 INFO L225 Difference]: With dead ends: 19 [2022-03-18 17:45:27,838 INFO L226 Difference]: Without dead ends: 19 [2022-03-18 17:45:27,843 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 17:45:27,845 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:45:27,846 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:45:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-18 17:45:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-18 17:45:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:45:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-03-18 17:45:27,855 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2022-03-18 17:45:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:45:27,858 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-03-18 17:45:27,858 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) [2022-03-18 17:45:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-03-18 17:45:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 17:45:27,859 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:45:27,859 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:45:27,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 17:45:27,859 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:45:27,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:45:27,860 INFO L85 PathProgramCache]: Analyzing trace with hash 305534661, now seen corresponding path program 1 times [2022-03-18 17:45:27,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:45:27,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899166196] [2022-03-18 17:45:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:27,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:45:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:27,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:45:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:45:27,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:45:27,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899166196] [2022-03-18 17:45:27,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899166196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:45:27,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:45:27,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 17:45:27,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708833494] [2022-03-18 17:45:27,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:45:27,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 17:45:27,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:45:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 17:45:27,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 17:45:27,905 INFO L87 Difference]: Start difference. First operand 19 states and 22 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) [2022-03-18 17:45:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:45:27,934 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-03-18 17:45:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 17:45:27,935 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 [2022-03-18 17:45:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:45:27,935 INFO L225 Difference]: With dead ends: 20 [2022-03-18 17:45:27,935 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 17:45:27,938 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 17:45:27,942 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:45:27,943 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:45:27,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 17:45:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-18 17:45:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:45:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-03-18 17:45:27,946 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-03-18 17:45:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:45:27,946 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-03-18 17:45:27,946 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) [2022-03-18 17:45:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-03-18 17:45:27,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 17:45:27,947 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:45:27,947 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:45:27,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 17:45:27,947 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:45:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:45:27,948 INFO L85 PathProgramCache]: Analyzing trace with hash 906513450, now seen corresponding path program 1 times [2022-03-18 17:45:27,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:45:27,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523464086] [2022-03-18 17:45:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:27,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:45:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:27,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:45:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:45:27,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:45:27,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523464086] [2022-03-18 17:45:27,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523464086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:45:27,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759495078] [2022-03-18 17:45:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:27,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:45:27,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:45:27,994 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) [2022-03-18 17:45:28,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 17:45:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:28,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 17:45:28,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:45:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:45:28,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:45:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:45:28,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759495078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:45:28,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:45:28,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 17:45:28,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876123017] [2022-03-18 17:45:28,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:45:28,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 17:45:28,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:45:28,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 17:45:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 17:45:28,180 INFO L87 Difference]: Start difference. First operand 20 states and 23 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) [2022-03-18 17:45:28,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:45:28,292 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-03-18 17:45:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 17:45:28,292 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 [2022-03-18 17:45:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:45:28,293 INFO L225 Difference]: With dead ends: 25 [2022-03-18 17:45:28,293 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 17:45:28,294 INFO L911 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 [2022-03-18 17:45:28,303 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:45:28,304 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 38 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:45:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 17:45:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-18 17:45:28,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:45:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-18 17:45:28,312 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2022-03-18 17:45:28,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:45:28,313 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-18 17:45:28,313 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) [2022-03-18 17:45:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-18 17:45:28,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 17:45:28,314 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:45:28,314 INFO L500 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:45:28,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 17:45:28,527 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 [2022-03-18 17:45:28,528 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:45:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:45:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1586204636, now seen corresponding path program 1 times [2022-03-18 17:45:28,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:45:28,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947539046] [2022-03-18 17:45:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:28,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:45:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:28,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:45:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:45:28,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:45:28,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947539046] [2022-03-18 17:45:28,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947539046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:45:28,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366942537] [2022-03-18 17:45:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:28,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:45:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:45:28,624 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) [2022-03-18 17:45:28,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 17:45:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:28,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 17:45:28,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:45:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:45:28,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:45:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:45:28,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366942537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:45:28,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:45:28,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 17:45:28,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064055873] [2022-03-18 17:45:28,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:45:28,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 17:45:28,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:45:28,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 17:45:28,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 17:45:28,822 INFO L87 Difference]: Start difference. First operand 25 states and 29 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) [2022-03-18 17:45:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:45:28,935 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-03-18 17:45:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 17:45:28,936 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 [2022-03-18 17:45:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:45:28,937 INFO L225 Difference]: With dead ends: 33 [2022-03-18 17:45:28,937 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 17:45:28,938 INFO L911 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 [2022-03-18 17:45:28,939 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:45:28,939 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 39 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:45:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 17:45:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-18 17:45:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:45:28,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-03-18 17:45:28,950 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2022-03-18 17:45:28,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:45:28,951 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-03-18 17:45:28,951 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) [2022-03-18 17:45:28,951 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-03-18 17:45:28,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 17:45:28,952 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:45:28,952 INFO L500 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:45:28,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 17:45:29,175 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 [2022-03-18 17:45:29,176 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:45:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:45:29,176 INFO L85 PathProgramCache]: Analyzing trace with hash -233424180, now seen corresponding path program 2 times [2022-03-18 17:45:29,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:45:29,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617908071] [2022-03-18 17:45:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:29,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:45:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:29,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:45:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:45:29,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:45:29,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617908071] [2022-03-18 17:45:29,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617908071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:45:29,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594161073] [2022-03-18 17:45:29,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 17:45:29,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:45:29,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:45:29,290 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) [2022-03-18 17:45:29,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 17:45:29,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 17:45:29,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:45:29,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 17:45:29,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:45:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:45:29,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:45:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:45:29,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594161073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:45:29,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:45:29,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 17:45:29,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321136806] [2022-03-18 17:45:29,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:45:29,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 17:45:29,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:45:29,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 17:45:29,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-18 17:45:29,536 INFO L87 Difference]: Start difference. First operand 33 states and 37 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) [2022-03-18 17:45:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:45:29,746 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-03-18 17:45:29,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 17:45:29,747 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 [2022-03-18 17:45:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:45:29,747 INFO L225 Difference]: With dead ends: 49 [2022-03-18 17:45:29,747 INFO L226 Difference]: Without dead ends: 49 [2022-03-18 17:45:29,748 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-18 17:45:29,749 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:45:29,749 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:45:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-18 17:45:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-18 17:45:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.119047619047619) internal successors, (47), 43 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:45:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-03-18 17:45:29,753 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2022-03-18 17:45:29,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:45:29,753 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-03-18 17:45:29,753 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) [2022-03-18 17:45:29,754 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-03-18 17:45:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 17:45:29,754 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:45:29,755 INFO L500 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:45:29,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 17:45:29,971 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 [2022-03-18 17:45:29,972 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:45:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:45:29,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2041954476, now seen corresponding path program 3 times [2022-03-18 17:45:29,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:45:29,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754275592] [2022-03-18 17:45:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:29,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:45:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:30,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:45:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:45:30,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:45:30,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754275592] [2022-03-18 17:45:30,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754275592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:45:30,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098636638] [2022-03-18 17:45:30,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 17:45:30,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:45:30,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:45:30,161 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) [2022-03-18 17:45:30,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 17:45:30,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-18 17:45:30,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:45:30,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 17:45:30,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:45:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-18 17:45:30,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:45:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-18 17:45:30,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098636638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:45:30,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:45:30,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-03-18 17:45:30,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366154456] [2022-03-18 17:45:30,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:45:30,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 17:45:30,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:45:30,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 17:45:30,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-18 17:45:30,457 INFO L87 Difference]: Start difference. First operand 49 states and 53 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) [2022-03-18 17:45:30,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:45:30,860 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-03-18 17:45:30,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 17:45:30,860 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 [2022-03-18 17:45:30,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:45:30,861 INFO L225 Difference]: With dead ends: 59 [2022-03-18 17:45:30,861 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 17:45:30,862 INFO L911 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 [2022-03-18 17:45:30,863 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:45:30,863 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 43 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:45:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 17:45:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-18 17:45:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:45:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-03-18 17:45:30,868 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 45 [2022-03-18 17:45:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:45:30,868 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-03-18 17:45:30,869 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) [2022-03-18 17:45:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-03-18 17:45:30,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 17:45:30,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:45:30,870 INFO L500 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:45:30,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 17:45:31,075 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 [2022-03-18 17:45:31,075 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:45:31,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:45:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1756179500, now seen corresponding path program 4 times [2022-03-18 17:45:31,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:45:31,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627842757] [2022-03-18 17:45:31,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:31,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:45:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:31,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:45:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:45:31,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:45:31,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627842757] [2022-03-18 17:45:31,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627842757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:45:31,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793115156] [2022-03-18 17:45:31,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 17:45:31,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:45:31,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:45:31,291 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) [2022-03-18 17:45:31,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 17:45:31,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 17:45:31,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:45:31,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 17:45:31,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:45:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:45:31,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:45:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:45:31,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793115156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:45:31,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:45:31,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-18 17:45:31,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206751494] [2022-03-18 17:45:31,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:45:31,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 17:45:31,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:45:31,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 17:45:31,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 17:45:31,885 INFO L87 Difference]: Start difference. First operand 59 states and 67 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) [2022-03-18 17:45:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:45:32,526 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-03-18 17:45:32,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 17:45:32,527 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 [2022-03-18 17:45:32,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:45:32,528 INFO L225 Difference]: With dead ends: 93 [2022-03-18 17:45:32,528 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 17:45:32,530 INFO L911 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 [2022-03-18 17:45:32,530 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:45:32,531 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 59 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:45:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 17:45:32,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-18 17:45:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 87 states have internal predecessors, (95), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:45:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2022-03-18 17:45:32,536 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 55 [2022-03-18 17:45:32,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:45:32,537 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2022-03-18 17:45:32,537 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) [2022-03-18 17:45:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2022-03-18 17:45:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 17:45:32,538 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:45:32,538 INFO L500 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:45:32,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 17:45:32,752 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 [2022-03-18 17:45:32,753 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:45:32,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:45:32,753 INFO L85 PathProgramCache]: Analyzing trace with hash 666806736, now seen corresponding path program 5 times [2022-03-18 17:45:32,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:45:32,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582975084] [2022-03-18 17:45:32,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:32,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:45:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:33,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:45:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:45:33,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:45:33,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582975084] [2022-03-18 17:45:33,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582975084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:45:33,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941153983] [2022-03-18 17:45:33,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 17:45:33,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:45:33,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:45:33,284 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) [2022-03-18 17:45:33,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 17:45:33,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-03-18 17:45:33,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:45:33,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 17:45:33,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:45:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:45:33,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:45:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:45:34,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941153983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:45:34,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:45:34,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-18 17:45:34,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59827954] [2022-03-18 17:45:34,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:45:34,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 17:45:34,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:45:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 17:45:34,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 17:45:34,899 INFO L87 Difference]: Start difference. First operand 93 states and 101 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) [2022-03-18 17:45:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:45:36,816 INFO L93 Difference]: Finished difference Result 161 states and 169 transitions. [2022-03-18 17:45:36,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 17:45:36,817 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 [2022-03-18 17:45:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:45:36,817 INFO L225 Difference]: With dead ends: 161 [2022-03-18 17:45:36,818 INFO L226 Difference]: Without dead ends: 161 [2022-03-18 17:45:36,821 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 17:45:36,822 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 17:45:36,822 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 59 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 17:45:36,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-18 17:45:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-03-18 17:45:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 155 states have internal predecessors, (163), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:45:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 169 transitions. [2022-03-18 17:45:36,830 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 169 transitions. Word has length 89 [2022-03-18 17:45:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:45:36,831 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 169 transitions. [2022-03-18 17:45:36,831 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) [2022-03-18 17:45:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 169 transitions. [2022-03-18 17:45:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-18 17:45:36,833 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:45:36,833 INFO L500 BasicCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:45:36,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 17:45:37,038 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 [2022-03-18 17:45:37,038 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:45:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:45:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1710004424, now seen corresponding path program 6 times [2022-03-18 17:45:37,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:45:37,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930543101] [2022-03-18 17:45:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:37,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:45:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:38,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:45:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:45:38,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:45:38,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930543101] [2022-03-18 17:45:38,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930543101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:45:38,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568054267] [2022-03-18 17:45:38,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 17:45:38,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:45:38,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:45:38,652 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) [2022-03-18 17:45:38,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 17:45:38,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-18 17:45:38,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:45:38,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 17:45:38,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:45:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-03-18 17:45:39,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:45:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-03-18 17:45:39,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568054267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:45:39,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:45:39,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 9, 9] total 84 [2022-03-18 17:45:39,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125131719] [2022-03-18 17:45:39,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:45:39,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-18 17:45:39,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:45:39,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-18 17:45:39,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 17:45:39,785 INFO L87 Difference]: Start difference. First operand 161 states and 169 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) [2022-03-18 17:45:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:45:42,487 INFO L93 Difference]: Finished difference Result 179 states and 195 transitions. [2022-03-18 17:45:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 17:45:42,488 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 [2022-03-18 17:45:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:45:42,489 INFO L225 Difference]: With dead ends: 179 [2022-03-18 17:45:42,489 INFO L226 Difference]: Without dead ends: 179 [2022-03-18 17:45:42,494 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-03-18 17:45:42,495 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 246 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 17:45:42,495 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 38 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 17:45:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-18 17:45:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-03-18 17:45:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 172 states have (on average 1.0988372093023255) internal successors, (189), 173 states have internal predecessors, (189), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:45:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 195 transitions. [2022-03-18 17:45:42,506 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 195 transitions. Word has length 157 [2022-03-18 17:45:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:45:42,506 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 195 transitions. [2022-03-18 17:45:42,506 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) [2022-03-18 17:45:42,507 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 195 transitions. [2022-03-18 17:45:42,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-18 17:45:42,509 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:45:42,509 INFO L500 BasicCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:45:42,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 17:45:42,715 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 [2022-03-18 17:45:42,716 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:45:42,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:45:42,716 INFO L85 PathProgramCache]: Analyzing trace with hash -682717732, now seen corresponding path program 7 times [2022-03-18 17:45:42,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:45:42,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75222593] [2022-03-18 17:45:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:42,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:45:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:44,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:45:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:45:44,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:45:44,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75222593] [2022-03-18 17:45:44,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75222593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:45:44,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355360462] [2022-03-18 17:45:44,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 17:45:44,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:45:44,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:45:44,368 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) [2022-03-18 17:45:44,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 17:45:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:44,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 17:45:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:45:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:45:44,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:45:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:45:49,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355360462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:45:49,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:45:49,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-18 17:45:49,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243505157] [2022-03-18 17:45:49,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:45:49,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-18 17:45:49,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:45:49,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-18 17:45:49,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 17:45:49,112 INFO L87 Difference]: Start difference. First operand 179 states and 195 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) [2022-03-18 17:45:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:45:55,308 INFO L93 Difference]: Finished difference Result 317 states and 333 transitions. [2022-03-18 17:45:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-18 17:45:55,308 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 [2022-03-18 17:45:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:45:55,310 INFO L225 Difference]: With dead ends: 317 [2022-03-18 17:45:55,310 INFO L226 Difference]: Without dead ends: 317 [2022-03-18 17:45:55,315 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-18 17:45:55,315 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 148 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 17:45:55,315 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 49 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 17:45:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-03-18 17:45:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2022-03-18 17:45:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 310 states have (on average 1.0548387096774194) internal successors, (327), 311 states have internal predecessors, (327), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:45:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 333 transitions. [2022-03-18 17:45:55,324 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 333 transitions. Word has length 175 [2022-03-18 17:45:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:45:55,325 INFO L478 AbstractCegarLoop]: Abstraction has 317 states and 333 transitions. [2022-03-18 17:45:55,325 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) [2022-03-18 17:45:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 333 transitions. [2022-03-18 17:45:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-03-18 17:45:55,329 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:45:55,329 INFO L500 BasicCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:45:55,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 17:45:55,552 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 [2022-03-18 17:45:55,553 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:45:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:45:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash -935852536, now seen corresponding path program 8 times [2022-03-18 17:45:55,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:45:55,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738903323] [2022-03-18 17:45:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:55,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:45:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:46:01,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:46:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:46:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:46:01,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:46:01,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738903323] [2022-03-18 17:46:01,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738903323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:46:01,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90753603] [2022-03-18 17:46:01,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 17:46:01,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:46:01,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:46:01,306 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) [2022-03-18 17:46:01,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 17:46:01,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 17:46:01,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:46:01,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-18 17:46:01,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:46:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:46:01,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:46:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:46:18,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90753603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:46:18,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:46:18,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-18 17:46:18,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598245145] [2022-03-18 17:46:18,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:46:18,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-18 17:46:18,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:46:18,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-18 17:46:18,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-18 17:46:18,785 INFO L87 Difference]: Start difference. First operand 317 states and 333 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) [2022-03-18 17:46:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:46:42,263 INFO L93 Difference]: Finished difference Result 593 states and 609 transitions. [2022-03-18 17:46:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-18 17:46:42,266 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 [2022-03-18 17:46:42,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:46:42,269 INFO L225 Difference]: With dead ends: 593 [2022-03-18 17:46:42,269 INFO L226 Difference]: Without dead ends: 593 [2022-03-18 17:46:42,284 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-18 17:46:42,285 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 286 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 17:46:42,285 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 54 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 17:46:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-03-18 17:46:42,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2022-03-18 17:46:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 586 states have (on average 1.02901023890785) internal successors, (603), 587 states have internal predecessors, (603), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:46:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 609 transitions. [2022-03-18 17:46:42,298 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 609 transitions. Word has length 313 [2022-03-18 17:46:42,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:46:42,299 INFO L478 AbstractCegarLoop]: Abstraction has 593 states and 609 transitions. [2022-03-18 17:46:42,300 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) [2022-03-18 17:46:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 609 transitions. [2022-03-18 17:46:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2022-03-18 17:46:42,315 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:46:42,315 INFO L500 BasicCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:46:42,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 17:46:42,538 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 [2022-03-18 17:46:42,539 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:46:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:46:42,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1310351008, now seen corresponding path program 9 times [2022-03-18 17:46:42,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:46:42,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530435593] [2022-03-18 17:46:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:46:42,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:46:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:47:04,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:47:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:47:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:47:04,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:47:04,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530435593] [2022-03-18 17:47:04,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530435593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:47:04,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931678377] [2022-03-18 17:47:04,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 17:47:04,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:47:04,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:47:04,731 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) [2022-03-18 17:47:04,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 17:47:04,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-03-18 17:47:04,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:47:04,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 17:47:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:47:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-03-18 17:47:07,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:47:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-03-18 17:47:11,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931678377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:47:11,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:47:11,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 17, 17] total 308 [2022-03-18 17:47:11,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089206926] [2022-03-18 17:47:11,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:47:11,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 308 states [2022-03-18 17:47:11,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:47:11,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 308 interpolants. [2022-03-18 17:47:11,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46973, Invalid=47583, Unknown=0, NotChecked=0, Total=94556 [2022-03-18 17:47:11,121 INFO L87 Difference]: Start difference. First operand 593 states and 609 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) [2022-03-18 17:47:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:47:44,751 INFO L93 Difference]: Finished difference Result 627 states and 659 transitions. [2022-03-18 17:47:44,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-03-18 17:47:44,752 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 [2022-03-18 17:47:44,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:47:44,755 INFO L225 Difference]: With dead ends: 627 [2022-03-18 17:47:44,755 INFO L226 Difference]: Without dead ends: 627 [2022-03-18 17:47:44,772 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1790 GetRequests, 1179 SyntacticMatches, 0 SemanticMatches, 611 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46725 ImplicationChecksByTransitivity, 57.0s TimeCoverageRelationStatistics Valid=140913, Invalid=234243, Unknown=0, NotChecked=0, Total=375156 [2022-03-18 17:47:44,773 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 620 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 1273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1273 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 17:47:44,773 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 43 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1273 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 17:47:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-03-18 17:47:44,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 627. [2022-03-18 17:47:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 620 states have (on average 1.053225806451613) internal successors, (653), 621 states have internal predecessors, (653), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:47:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 659 transitions. [2022-03-18 17:47:44,782 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 659 transitions. Word has length 589 [2022-03-18 17:47:44,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:47:44,783 INFO L478 AbstractCegarLoop]: Abstraction has 627 states and 659 transitions. [2022-03-18 17:47:44,784 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) [2022-03-18 17:47:44,784 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 659 transitions. [2022-03-18 17:47:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2022-03-18 17:47:44,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:47:44,796 INFO L500 BasicCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:47:44,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 17:47:45,007 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 [2022-03-18 17:47:45,007 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:47:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:47:45,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2114917964, now seen corresponding path program 10 times [2022-03-18 17:47:45,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:47:45,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063706565] [2022-03-18 17:47:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:47:45,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:47:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:48:07,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:48:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:48:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-18 17:48:07,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:48:07,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063706565] [2022-03-18 17:48:07,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063706565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:48:07,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26266553] [2022-03-18 17:48:07,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 17:48:07,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:48:07,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:48:07,758 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) [2022-03-18 17:48:07,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 17:48:07,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 17:48:07,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:48:07,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-18 17:48:07,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:48:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-18 17:48:09,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:49:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-18 17:49:16,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26266553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:49:16,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:49:16,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-18 17:49:16,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285456739] [2022-03-18 17:49:16,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:49:16,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-18 17:49:16,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:49:16,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-18 17:49:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-18 17:49:16,840 INFO L87 Difference]: Start difference. First operand 627 states and 659 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) [2022-03-18 17:50:54,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:50:54,352 INFO L93 Difference]: Finished difference Result 1181 states and 1213 transitions. [2022-03-18 17:50:54,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-18 17:50:54,353 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 [2022-03-18 17:50:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:50:54,358 INFO L225 Difference]: With dead ends: 1181 [2022-03-18 17:50:54,358 INFO L226 Difference]: Without dead ends: 1181 [2022-03-18 17:50:54,435 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2077 GetRequests, 971 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 179.6s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-18 17:50:54,435 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 564 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:50:54,435 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 64 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 17:50:54,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-03-18 17:50:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1181. [2022-03-18 17:50:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1174 states have (on average 1.0281090289608177) internal successors, (1207), 1175 states have internal predecessors, (1207), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:50:54,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1213 transitions. [2022-03-18 17:50:54,451 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1213 transitions. Word has length 623 [2022-03-18 17:50:54,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:50:54,452 INFO L478 AbstractCegarLoop]: Abstraction has 1181 states and 1213 transitions. [2022-03-18 17:50:54,453 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) [2022-03-18 17:50:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1213 transitions. [2022-03-18 17:50:54,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1178 [2022-03-18 17:50:54,465 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:50:54,465 INFO L500 BasicCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:50:54,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 17:50:54,669 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 [2022-03-18 17:50:54,669 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:50:54,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:50:54,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1552361272, now seen corresponding path program 11 times [2022-03-18 17:50:54,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:50:54,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650858454] [2022-03-18 17:50:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:50:54,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:50:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:52:26,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:52:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:52:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-18 17:52:26,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:52:26,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650858454] [2022-03-18 17:52:26,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650858454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:52:26,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869430858] [2022-03-18 17:52:26,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 17:52:26,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:52:26,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:52:26,444 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) [2022-03-18 17:52:26,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 17:52:28,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-03-18 17:52:28,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:52:28,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 2445 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-18 17:52:28,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:52:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-18 17:52:30,712 INFO L328 TraceCheckSpWp]: Computing backward predicates...