/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-05ce600 [2022-02-23 16:36:33,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 16:36:33,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 16:36:33,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 16:36:33,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 16:36:33,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 16:36:33,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 16:36:33,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 16:36:33,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 16:36:33,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 16:36:33,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 16:36:33,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 16:36:33,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 16:36:33,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 16:36:33,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 16:36:33,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 16:36:33,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 16:36:33,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 16:36:33,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 16:36:33,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 16:36:33,238 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 16:36:33,251 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 16:36:33,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 16:36:33,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 16:36:33,252 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 16:36:33,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 16:36:33,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 16:36:33,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 16:36:33,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 16:36:33,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 16:36:33,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 16:36:33,253 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 16:36:33,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 16:36:33,254 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 16:36:33,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 16:36:33,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 16:36:33,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 16:36:33,254 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 16:36:33,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 16:36:33,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:36:33,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 16:36:33,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 16:36:33,255 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 16:36:33,255 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 16:36:33,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 16:36:33,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 16:36:33,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 16:36:33,468 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 16:36:33,468 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 16:36:33,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-02-23 16:36:33,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dd01defc/275497194aee46a6b4c3996166b59866/FLAG110075aeb [2022-02-23 16:36:33,809 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 16:36:33,810 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-02-23 16:36:33,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dd01defc/275497194aee46a6b4c3996166b59866/FLAG110075aeb [2022-02-23 16:36:34,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dd01defc/275497194aee46a6b4c3996166b59866 [2022-02-23 16:36:34,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 16:36:34,253 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 16:36:34,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 16:36:34,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 16:36:34,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 16:36:34,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:36:34" (1/1) ... [2022-02-23 16:36:34,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96d25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:36:34, skipping insertion in model container [2022-02-23 16:36:34,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:36:34" (1/1) ... [2022-02-23 16:36:34,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 16:36:34,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 16:36:34,383 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] [2022-02-23 16:36:34,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:36:34,400 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 16:36:34,407 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] [2022-02-23 16:36:34,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:36:34,418 INFO L208 MainTranslator]: Completed translation [2022-02-23 16:36:34,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:36:34 WrapperNode [2022-02-23 16:36:34,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 16:36:34,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 16:36:34,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 16:36:34,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 16:36:34,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:36:34" (1/1) ... [2022-02-23 16:36:34,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:36:34" (1/1) ... [2022-02-23 16:36:34,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:36:34" (1/1) ... [2022-02-23 16:36:34,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:36:34" (1/1) ... [2022-02-23 16:36:34,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:36:34" (1/1) ... [2022-02-23 16:36:34,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:36:34" (1/1) ... [2022-02-23 16:36:34,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:36:34" (1/1) ... [2022-02-23 16:36:34,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 16:36:34,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 16:36:34,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 16:36:34,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 16:36:34,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:36:34" (1/1) ... [2022-02-23 16:36:34,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:36:34,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:36:34,464 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) [2022-02-23 16:36:34,467 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 [2022-02-23 16:36:34,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 16:36:34,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 16:36:34,487 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 16:36:34,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 16:36:34,487 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 16:36:34,487 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 16:36:34,487 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 16:36:34,487 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 16:36:34,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 16:36:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 16:36:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 16:36:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 16:36:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 16:36:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 16:36:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 16:36:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 16:36:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 16:36:34,528 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 16:36:34,529 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 16:36:34,596 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 16:36:34,600 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 16:36:34,600 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 16:36:34,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:36:34 BoogieIcfgContainer [2022-02-23 16:36:34,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 16:36:34,602 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 16:36:34,602 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 16:36:34,603 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 16:36:34,632 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:36:34" (1/1) ... [2022-02-23 16:36:34,858 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 [2022-02-23 16:36:34,858 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] [2022-02-23 16:36:34,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:36:34 BasicIcfg [2022-02-23 16:36:34,862 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 16:36:34,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 16:36:34,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 16:36:34,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 16:36:34,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:36:34" (1/4) ... [2022-02-23 16:36:34,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdf743c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:36:34, skipping insertion in model container [2022-02-23 16:36:34,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:36:34" (2/4) ... [2022-02-23 16:36:34,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdf743c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:36:34, skipping insertion in model container [2022-02-23 16:36:34,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:36:34" (3/4) ... [2022-02-23 16:36:34,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdf743c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:36:34, skipping insertion in model container [2022-02-23 16:36:34,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:36:34" (4/4) ... [2022-02-23 16:36:34,878 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.cJordan [2022-02-23 16:36:34,881 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 16:36:34,881 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 16:36:34,916 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 16:36:34,921 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 16:36:34,922 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 16:36:34,930 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) [2022-02-23 16:36:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 16:36:34,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:36:34,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:36:34,936 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:36:34,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:36:34,939 INFO L85 PathProgramCache]: Analyzing trace with hash -412568735, now seen corresponding path program 1 times [2022-02-23 16:36:34,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:36:34,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679394332] [2022-02-23 16:36:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:34,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:36:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:35,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:36:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:36:35,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:36:35,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679394332] [2022-02-23 16:36:35,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679394332] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:36:35,064 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:36:35,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 16:36:35,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785380502] [2022-02-23 16:36:35,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:36:35,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 16:36:35,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:36:35,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 16:36:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 16:36:35,091 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) [2022-02-23 16:36:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:36:35,121 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-02-23 16:36:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 16:36:35,124 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 [2022-02-23 16:36:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:36:35,132 INFO L225 Difference]: With dead ends: 22 [2022-02-23 16:36:35,132 INFO L226 Difference]: Without dead ends: 17 [2022-02-23 16:36:35,133 INFO L932 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 [2022-02-23 16:36:35,136 INFO L933 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 [2022-02-23 16:36:35,137 INFO L934 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] [2022-02-23 16:36:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-23 16:36:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-23 16:36:35,157 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) [2022-02-23 16:36:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-02-23 16:36:35,159 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-02-23 16:36:35,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:36:35,159 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-02-23 16:36:35,159 INFO L471 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) [2022-02-23 16:36:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-02-23 16:36:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 16:36:35,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:36:35,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:36:35,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 16:36:35,160 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:36:35,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:36:35,162 INFO L85 PathProgramCache]: Analyzing trace with hash -383016063, now seen corresponding path program 1 times [2022-02-23 16:36:35,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:36:35,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486049925] [2022-02-23 16:36:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:35,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:36:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:35,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:36:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:36:35,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:36:35,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486049925] [2022-02-23 16:36:35,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486049925] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:36:35,212 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:36:35,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 16:36:35,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117864668] [2022-02-23 16:36:35,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:36:35,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 16:36:35,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:36:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 16:36:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 16:36:35,214 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) [2022-02-23 16:36:35,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:36:35,241 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-02-23 16:36:35,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 16:36:35,241 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 [2022-02-23 16:36:35,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:36:35,242 INFO L225 Difference]: With dead ends: 19 [2022-02-23 16:36:35,242 INFO L226 Difference]: Without dead ends: 19 [2022-02-23 16:36:35,242 INFO L932 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 [2022-02-23 16:36:35,243 INFO L933 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 [2022-02-23 16:36:35,243 INFO L934 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] [2022-02-23 16:36:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-23 16:36:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-02-23 16:36:35,249 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) [2022-02-23 16:36:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-02-23 16:36:35,250 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2022-02-23 16:36:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:36:35,250 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-02-23 16:36:35,250 INFO L471 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) [2022-02-23 16:36:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-02-23 16:36:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 16:36:35,251 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:36:35,251 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:36:35,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 16:36:35,251 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:36:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:36:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash 305534661, now seen corresponding path program 1 times [2022-02-23 16:36:35,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:36:35,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200223098] [2022-02-23 16:36:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:35,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:36:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:35,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:36:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 16:36:35,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:36:35,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200223098] [2022-02-23 16:36:35,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200223098] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:36:35,292 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:36:35,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 16:36:35,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704563333] [2022-02-23 16:36:35,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:36:35,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 16:36:35,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:36:35,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 16:36:35,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 16:36:35,293 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) [2022-02-23 16:36:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:36:35,319 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-02-23 16:36:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 16:36:35,319 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 [2022-02-23 16:36:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:36:35,320 INFO L225 Difference]: With dead ends: 20 [2022-02-23 16:36:35,320 INFO L226 Difference]: Without dead ends: 20 [2022-02-23 16:36:35,320 INFO L932 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 [2022-02-23 16:36:35,321 INFO L933 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 [2022-02-23 16:36:35,321 INFO L934 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] [2022-02-23 16:36:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-23 16:36:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-23 16:36:35,323 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) [2022-02-23 16:36:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-23 16:36:35,324 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-02-23 16:36:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:36:35,324 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-23 16:36:35,324 INFO L471 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) [2022-02-23 16:36:35,324 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-23 16:36:35,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-23 16:36:35,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:36:35,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:36:35,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 16:36:35,325 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:36:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:36:35,326 INFO L85 PathProgramCache]: Analyzing trace with hash 906513450, now seen corresponding path program 1 times [2022-02-23 16:36:35,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:36:35,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067718549] [2022-02-23 16:36:35,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:35,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:36:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:35,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:36:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 16:36:35,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:36:35,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067718549] [2022-02-23 16:36:35,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067718549] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:36:35,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140664042] [2022-02-23 16:36:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:35,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:35,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:36:35,370 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) [2022-02-23 16:36:35,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 16:36:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:35,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 16:36:35,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:36:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 16:36:35,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:36:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 16:36:35,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140664042] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:36:35,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:36:35,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-23 16:36:35,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724588304] [2022-02-23 16:36:35,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:36:35,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 16:36:35,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:36:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 16:36:35,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-23 16:36:35,494 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) [2022-02-23 16:36:35,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:36:35,572 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-02-23 16:36:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 16:36:35,572 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 [2022-02-23 16:36:35,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:36:35,573 INFO L225 Difference]: With dead ends: 25 [2022-02-23 16:36:35,573 INFO L226 Difference]: Without dead ends: 25 [2022-02-23 16:36:35,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-02-23 16:36:35,574 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:36:35,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 38 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:36:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-23 16:36:35,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-23 16:36:35,576 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) [2022-02-23 16:36:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-02-23 16:36:35,577 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2022-02-23 16:36:35,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:36:35,577 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-02-23 16:36:35,577 INFO L471 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) [2022-02-23 16:36:35,577 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-02-23 16:36:35,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-23 16:36:35,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:36:35,577 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:36:35,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 16:36:35,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:35,783 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:36:35,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:36:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1586204636, now seen corresponding path program 1 times [2022-02-23 16:36:35,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:36:35,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446197651] [2022-02-23 16:36:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:35,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:36:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:35,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:36:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:36:35,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:36:35,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446197651] [2022-02-23 16:36:35,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446197651] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:36:35,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512298946] [2022-02-23 16:36:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:35,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:35,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:36:35,830 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) [2022-02-23 16:36:35,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 16:36:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:35,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 16:36:35,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:36:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:36:35,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:36:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:36:35,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512298946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:36:35,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:36:35,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-23 16:36:35,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618855341] [2022-02-23 16:36:35,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:36:35,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 16:36:35,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:36:35,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 16:36:35,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-02-23 16:36:35,962 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) [2022-02-23 16:36:36,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:36:36,056 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-02-23 16:36:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 16:36:36,056 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 [2022-02-23 16:36:36,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:36:36,058 INFO L225 Difference]: With dead ends: 33 [2022-02-23 16:36:36,058 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 16:36:36,058 INFO L932 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 [2022-02-23 16:36:36,061 INFO L933 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 [2022-02-23 16:36:36,074 INFO L934 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] [2022-02-23 16:36:36,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 16:36:36,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-23 16:36:36,079 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) [2022-02-23 16:36:36,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-02-23 16:36:36,080 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2022-02-23 16:36:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:36:36,080 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-02-23 16:36:36,080 INFO L471 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) [2022-02-23 16:36:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-02-23 16:36:36,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 16:36:36,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:36:36,081 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:36:36,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 16:36:36,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:36,284 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:36:36,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:36:36,284 INFO L85 PathProgramCache]: Analyzing trace with hash -233424180, now seen corresponding path program 2 times [2022-02-23 16:36:36,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:36:36,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849114038] [2022-02-23 16:36:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:36,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:36:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:36,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:36:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:36:36,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:36:36,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849114038] [2022-02-23 16:36:36,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849114038] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:36:36,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932003098] [2022-02-23 16:36:36,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:36:36,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:36,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:36:36,378 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) [2022-02-23 16:36:36,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 16:36:36,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:36:36,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:36:36,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-23 16:36:36,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:36:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:36:36,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:36:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:36:36,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932003098] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:36:36,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:36:36,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-23 16:36:36,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137137848] [2022-02-23 16:36:36,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:36:36,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 16:36:36,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:36:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 16:36:36,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-02-23 16:36:36,553 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) [2022-02-23 16:36:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:36:36,733 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-02-23 16:36:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 16:36:36,733 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 [2022-02-23 16:36:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:36:36,734 INFO L225 Difference]: With dead ends: 49 [2022-02-23 16:36:36,734 INFO L226 Difference]: Without dead ends: 49 [2022-02-23 16:36:36,734 INFO L932 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 [2022-02-23 16:36:36,735 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-02-23 16:36:36,735 INFO L934 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] [2022-02-23 16:36:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-23 16:36:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-02-23 16:36:36,738 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) [2022-02-23 16:36:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-02-23 16:36:36,738 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2022-02-23 16:36:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:36:36,739 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-02-23 16:36:36,739 INFO L471 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) [2022-02-23 16:36:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-02-23 16:36:36,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-23 16:36:36,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:36:36,740 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:36:36,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-23 16:36:36,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:36,955 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:36:36,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:36:36,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2041954476, now seen corresponding path program 3 times [2022-02-23 16:36:36,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:36:36,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609462785] [2022-02-23 16:36:36,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:36,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:36:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:37,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:36:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:36:37,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:36:37,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609462785] [2022-02-23 16:36:37,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609462785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:36:37,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842483582] [2022-02-23 16:36:37,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:36:37,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:37,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:36:37,135 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) [2022-02-23 16:36:37,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 16:36:37,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-23 16:36:37,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:36:37,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 16:36:37,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:36:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-02-23 16:36:37,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:36:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-02-23 16:36:37,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842483582] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:36:37,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:36:37,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-02-23 16:36:37,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765888881] [2022-02-23 16:36:37,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:36:37,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 16:36:37,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:36:37,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 16:36:37,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-02-23 16:36:37,349 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) [2022-02-23 16:36:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:36:37,669 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-02-23 16:36:37,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-23 16:36:37,669 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 [2022-02-23 16:36:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:36:37,670 INFO L225 Difference]: With dead ends: 59 [2022-02-23 16:36:37,670 INFO L226 Difference]: Without dead ends: 59 [2022-02-23 16:36:37,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-02-23 16:36:37,671 INFO L933 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 [2022-02-23 16:36:37,672 INFO L934 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] [2022-02-23 16:36:37,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-23 16:36:37,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-23 16:36:37,675 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) [2022-02-23 16:36:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-02-23 16:36:37,676 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 45 [2022-02-23 16:36:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:36:37,676 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-02-23 16:36:37,676 INFO L471 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) [2022-02-23 16:36:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-02-23 16:36:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-23 16:36:37,677 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:36:37,677 INFO L514 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:36:37,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 16:36:37,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:37,889 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:36:37,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:36:37,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1756179500, now seen corresponding path program 4 times [2022-02-23 16:36:37,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:36:37,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121564049] [2022-02-23 16:36:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:37,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:36:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:38,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:36:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:36:38,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:36:38,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121564049] [2022-02-23 16:36:38,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121564049] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:36:38,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002332446] [2022-02-23 16:36:38,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 16:36:38,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:38,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:36:38,054 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) [2022-02-23 16:36:38,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 16:36:38,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 16:36:38,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:36:38,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 16:36:38,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:36:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:36:38,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:36:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:36:38,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002332446] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:36:38,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:36:38,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-02-23 16:36:38,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548436359] [2022-02-23 16:36:38,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:36:38,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-23 16:36:38,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:36:38,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-23 16:36:38,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-02-23 16:36:38,495 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) [2022-02-23 16:36:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:36:39,024 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-02-23 16:36:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-23 16:36:39,025 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 [2022-02-23 16:36:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:36:39,025 INFO L225 Difference]: With dead ends: 93 [2022-02-23 16:36:39,026 INFO L226 Difference]: Without dead ends: 93 [2022-02-23 16:36:39,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-02-23 16:36:39,028 INFO L933 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 [2022-02-23 16:36:39,028 INFO L934 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] [2022-02-23 16:36:39,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-23 16:36:39,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-02-23 16:36:39,032 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) [2022-02-23 16:36:39,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2022-02-23 16:36:39,032 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 55 [2022-02-23 16:36:39,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:36:39,033 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2022-02-23 16:36:39,033 INFO L471 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) [2022-02-23 16:36:39,033 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2022-02-23 16:36:39,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-23 16:36:39,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:36:39,034 INFO L514 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:36:39,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 16:36:39,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:39,246 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:36:39,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:36:39,247 INFO L85 PathProgramCache]: Analyzing trace with hash 666806736, now seen corresponding path program 5 times [2022-02-23 16:36:39,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:36:39,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511791929] [2022-02-23 16:36:39,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:39,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:36:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:39,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:36:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:36:39,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:36:39,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511791929] [2022-02-23 16:36:39,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511791929] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:36:39,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587766366] [2022-02-23 16:36:39,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 16:36:39,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:39,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:36:39,705 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) [2022-02-23 16:36:39,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 16:36:39,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-02-23 16:36:39,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:36:39,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-23 16:36:39,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:36:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:36:39,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:36:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:36:41,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587766366] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:36:41,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:36:41,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-02-23 16:36:41,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303417562] [2022-02-23 16:36:41,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:36:41,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-23 16:36:41,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:36:41,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-23 16:36:41,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-02-23 16:36:41,007 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) [2022-02-23 16:36:42,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:36:42,599 INFO L93 Difference]: Finished difference Result 161 states and 169 transitions. [2022-02-23 16:36:42,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-23 16:36:42,600 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 [2022-02-23 16:36:42,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:36:42,601 INFO L225 Difference]: With dead ends: 161 [2022-02-23 16:36:42,601 INFO L226 Difference]: Without dead ends: 161 [2022-02-23 16:36:42,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-02-23 16:36:42,605 INFO L933 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 [2022-02-23 16:36:42,605 INFO L934 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] [2022-02-23 16:36:42,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-02-23 16:36:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-02-23 16:36:42,610 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) [2022-02-23 16:36:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 169 transitions. [2022-02-23 16:36:42,614 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 169 transitions. Word has length 89 [2022-02-23 16:36:42,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:36:42,619 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 169 transitions. [2022-02-23 16:36:42,619 INFO L471 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) [2022-02-23 16:36:42,619 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 169 transitions. [2022-02-23 16:36:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-23 16:36:42,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:36:42,623 INFO L514 BasicCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:36:42,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 16:36:42,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:42,841 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:36:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:36:42,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1710004424, now seen corresponding path program 6 times [2022-02-23 16:36:42,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:36:42,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476525000] [2022-02-23 16:36:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:42,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:36:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:44,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:36:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:36:44,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:36:44,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476525000] [2022-02-23 16:36:44,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476525000] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:36:44,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380886867] [2022-02-23 16:36:44,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 16:36:44,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:44,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:36:44,230 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) [2022-02-23 16:36:44,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 16:36:44,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-02-23 16:36:44,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:36:44,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 16:36:44,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:36:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-02-23 16:36:44,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:36:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-02-23 16:36:45,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380886867] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:36:45,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:36:45,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 9, 9] total 84 [2022-02-23 16:36:45,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350946905] [2022-02-23 16:36:45,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:36:45,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-23 16:36:45,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:36:45,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-23 16:36:45,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-02-23 16:36:45,184 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) [2022-02-23 16:36:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:36:47,654 INFO L93 Difference]: Finished difference Result 179 states and 195 transitions. [2022-02-23 16:36:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-23 16:36:47,655 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 [2022-02-23 16:36:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:36:47,657 INFO L225 Difference]: With dead ends: 179 [2022-02-23 16:36:47,657 INFO L226 Difference]: Without dead ends: 179 [2022-02-23 16:36:47,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-02-23 16:36:47,661 INFO L933 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 [2022-02-23 16:36:47,661 INFO L934 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] [2022-02-23 16:36:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-23 16:36:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-02-23 16:36:47,668 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) [2022-02-23 16:36:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 195 transitions. [2022-02-23 16:36:47,669 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 195 transitions. Word has length 157 [2022-02-23 16:36:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:36:47,669 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 195 transitions. [2022-02-23 16:36:47,670 INFO L471 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) [2022-02-23 16:36:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 195 transitions. [2022-02-23 16:36:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-02-23 16:36:47,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:36:47,671 INFO L514 BasicCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:36:47,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 16:36:47,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:47,879 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:36:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:36:47,880 INFO L85 PathProgramCache]: Analyzing trace with hash -682717732, now seen corresponding path program 7 times [2022-02-23 16:36:47,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:36:47,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445362781] [2022-02-23 16:36:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:47,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:36:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:49,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:36:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:36:49,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:36:49,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445362781] [2022-02-23 16:36:49,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445362781] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:36:49,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885522984] [2022-02-23 16:36:49,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 16:36:49,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:36:49,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:36:49,237 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) [2022-02-23 16:36:49,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 16:36:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:36:49,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 69 conjunts are in the unsatisfiable core [2022-02-23 16:36:49,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:36:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:36:49,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:36:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:36:53,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885522984] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:36:53,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:36:53,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-02-23 16:36:53,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969402090] [2022-02-23 16:36:53,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:36:53,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-02-23 16:36:53,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:36:53,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-02-23 16:36:53,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-02-23 16:36:53,613 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) [2022-02-23 16:36:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:36:59,187 INFO L93 Difference]: Finished difference Result 317 states and 333 transitions. [2022-02-23 16:36:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-02-23 16:36:59,187 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 [2022-02-23 16:36:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:36:59,188 INFO L225 Difference]: With dead ends: 317 [2022-02-23 16:36:59,188 INFO L226 Difference]: Without dead ends: 317 [2022-02-23 16:36:59,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-02-23 16:36:59,193 INFO L933 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 16:36:59,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 49 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 16:36:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-23 16:36:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2022-02-23 16:36:59,203 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) [2022-02-23 16:36:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 333 transitions. [2022-02-23 16:36:59,204 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 333 transitions. Word has length 175 [2022-02-23 16:36:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:36:59,204 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 333 transitions. [2022-02-23 16:36:59,204 INFO L471 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) [2022-02-23 16:36:59,205 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 333 transitions. [2022-02-23 16:36:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-02-23 16:36:59,209 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:36:59,209 INFO L514 BasicCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:36:59,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-23 16:36:59,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 16:36:59,410 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:36:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:36:59,411 INFO L85 PathProgramCache]: Analyzing trace with hash -935852536, now seen corresponding path program 8 times [2022-02-23 16:36:59,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:36:59,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118443922] [2022-02-23 16:36:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:36:59,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:36:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:04,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:37:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:37:04,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:37:04,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118443922] [2022-02-23 16:37:04,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118443922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:37:04,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429931559] [2022-02-23 16:37:04,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:37:04,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:04,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:37:04,596 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) [2022-02-23 16:37:04,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 16:37:04,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:37:04,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:37:04,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 138 conjunts are in the unsatisfiable core [2022-02-23 16:37:04,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:37:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:37:05,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:37:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:37:20,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429931559] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:37:20,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:37:20,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-02-23 16:37:20,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396255561] [2022-02-23 16:37:20,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:37:20,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-02-23 16:37:20,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:37:20,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-02-23 16:37:20,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-02-23 16:37:20,321 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) [2022-02-23 16:37:41,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:37:41,757 INFO L93 Difference]: Finished difference Result 593 states and 609 transitions. [2022-02-23 16:37:41,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-02-23 16:37:41,757 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 [2022-02-23 16:37:41,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:37:41,759 INFO L225 Difference]: With dead ends: 593 [2022-02-23 16:37:41,759 INFO L226 Difference]: Without dead ends: 593 [2022-02-23 16:37:41,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-02-23 16:37:41,773 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 286 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 16:37:41,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 54 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 16:37:41,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-02-23 16:37:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2022-02-23 16:37:41,780 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) [2022-02-23 16:37:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 609 transitions. [2022-02-23 16:37:41,782 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 609 transitions. Word has length 313 [2022-02-23 16:37:41,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:37:41,782 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 609 transitions. [2022-02-23 16:37:41,782 INFO L471 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) [2022-02-23 16:37:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 609 transitions. [2022-02-23 16:37:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2022-02-23 16:37:41,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:37:41,789 INFO L514 BasicCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:37:41,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 16:37:42,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:42,017 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:37:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:37:42,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1310351008, now seen corresponding path program 9 times [2022-02-23 16:37:42,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:37:42,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804136046] [2022-02-23 16:37:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:42,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:37:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:01,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:38:01,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:01,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804136046] [2022-02-23 16:38:01,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804136046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:38:01,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761700185] [2022-02-23 16:38:01,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:38:01,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:01,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:38:01,909 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) [2022-02-23 16:38:01,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 16:38:02,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-02-23 16:38:02,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:38:02,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 16:38:02,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:38:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-02-23 16:38:04,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:38:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-02-23 16:38:07,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761700185] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:38:07,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:38:07,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 17, 17] total 308 [2022-02-23 16:38:07,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113390481] [2022-02-23 16:38:07,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:38:07,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 308 states [2022-02-23 16:38:07,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:07,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 308 interpolants. [2022-02-23 16:38:07,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46973, Invalid=47583, Unknown=0, NotChecked=0, Total=94556 [2022-02-23 16:38:07,542 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) [2022-02-23 16:38:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:38:38,472 INFO L93 Difference]: Finished difference Result 627 states and 659 transitions. [2022-02-23 16:38:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-02-23 16:38:38,473 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 [2022-02-23 16:38:38,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:38:38,475 INFO L225 Difference]: With dead ends: 627 [2022-02-23 16:38:38,475 INFO L226 Difference]: Without dead ends: 627 [2022-02-23 16:38:38,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1790 GetRequests, 1179 SyntacticMatches, 0 SemanticMatches, 611 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46725 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=140913, Invalid=234243, Unknown=0, NotChecked=0, Total=375156 [2022-02-23 16:38:38,490 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 620 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 1273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2022-02-23 16:38:38,490 INFO L934 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] [2022-02-23 16:38:38,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-02-23 16:38:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 627. [2022-02-23 16:38:38,496 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) [2022-02-23 16:38:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 659 transitions. [2022-02-23 16:38:38,497 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 659 transitions. Word has length 589 [2022-02-23 16:38:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:38:38,498 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 659 transitions. [2022-02-23 16:38:38,498 INFO L471 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) [2022-02-23 16:38:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 659 transitions. [2022-02-23 16:38:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2022-02-23 16:38:38,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:38,502 INFO L514 BasicCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:38,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-02-23 16:38:38,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 16:38:38,702 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:38,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:38,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2114917964, now seen corresponding path program 10 times [2022-02-23 16:38:38,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:38,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82322808] [2022-02-23 16:38:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:38,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:58,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 16:38:58,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:58,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82322808] [2022-02-23 16:38:58,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82322808] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:38:58,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455120653] [2022-02-23 16:38:58,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 16:38:58,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:58,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:38:58,893 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) [2022-02-23 16:38:58,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 16:38:59,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 16:38:59,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:38:59,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 277 conjunts are in the unsatisfiable core [2022-02-23 16:38:59,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:38:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 16:38:59,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:40:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 16:40:00,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455120653] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:40:00,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:40:00,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-02-23 16:40:00,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301792888] [2022-02-23 16:40:00,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:40:00,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-02-23 16:40:00,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:40:00,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-02-23 16:40:00,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-02-23 16:40:00,679 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) [2022-02-23 16:41:29,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:41:29,621 INFO L93 Difference]: Finished difference Result 1181 states and 1213 transitions. [2022-02-23 16:41:29,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-02-23 16:41:29,622 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 [2022-02-23 16:41:29,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:41:29,625 INFO L225 Difference]: With dead ends: 1181 [2022-02-23 16:41:29,625 INFO L226 Difference]: Without dead ends: 1181 [2022-02-23 16:41:29,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2077 GetRequests, 971 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 161.7s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-02-23 16:41:29,688 INFO L933 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:41:29,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 64 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-23 16:41:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-02-23 16:41:29,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1181. [2022-02-23 16:41:29,698 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) [2022-02-23 16:41:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1213 transitions. [2022-02-23 16:41:29,701 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1213 transitions. Word has length 623 [2022-02-23 16:41:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:41:29,701 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1213 transitions. [2022-02-23 16:41:29,702 INFO L471 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) [2022-02-23 16:41:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1213 transitions. [2022-02-23 16:41:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1178 [2022-02-23 16:41:29,712 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:41:29,712 INFO L514 BasicCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:41:29,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-23 16:41:29,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 16:41:29,927 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:41:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:41:29,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1552361272, now seen corresponding path program 11 times [2022-02-23 16:41:29,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:41:29,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866469388] [2022-02-23 16:41:29,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:41:29,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:41:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:42:50,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:42:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:42:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 16:42:50,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:42:50,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866469388] [2022-02-23 16:42:50,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866469388] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:42:50,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315767824] [2022-02-23 16:42:50,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 16:42:50,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:42:50,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:42:50,901 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) [2022-02-23 16:42:50,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 16:42:53,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-02-23 16:42:53,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:42:53,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 2445 conjuncts, 554 conjunts are in the unsatisfiable core [2022-02-23 16:42:53,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:42:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 16:42:54,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:47:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 16:47:04,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315767824] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:47:04,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:47:04,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [556, 555, 555] total 1110 [2022-02-23 16:47:04,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196112058] [2022-02-23 16:47:04,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:47:04,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 1110 states [2022-02-23 16:47:04,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:05,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1110 interpolants. [2022-02-23 16:47:05,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614388, Invalid=616602, Unknown=0, NotChecked=0, Total=1230990 [2022-02-23 16:47:05,103 INFO L87 Difference]: Start difference. First operand 1181 states and 1213 transitions. Second operand has 1110 states, 1110 states have (on average 2.007207207207207) internal successors, (2228), 1109 states have internal predecessors, (2228), 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)