/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_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 17:43:31,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 17:43:31,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 17:43:31,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 17:43:31,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 17:43:31,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 17:43:31,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 17:43:31,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 17:43:31,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 17:43:31,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 17:43:31,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 17:43:31,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 17:43:31,134 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 17:43:31,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 17:43:31,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 17:43:31,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 17:43:31,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 17:43:31,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 17:43:31,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 17:43:31,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 17:43:31,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 17:43:31,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 17:43:31,164 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 17:43:31,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 17:43:31,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 17:43:31,166 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 17:43:31,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 17:43:31,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 17:43:31,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 17:43:31,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 17:43:31,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 17:43:31,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 17:43:31,167 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 17:43:31,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 17:43:31,167 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 17:43:31,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 17:43:31,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 17:43:31,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 17:43:31,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 17:43:31,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 17:43:31,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:43:31,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 17:43:31,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 17:43:31,169 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 17:43:31,169 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 17:43:31,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 17:43:31,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 17:43:31,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 17:43:31,414 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 17:43:31,414 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 17:43:31,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-03-18 17:43:31,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/352c8573b/77cb49c8a02f45059cef5bc08cc3841c/FLAG23ae50350 [2022-03-18 17:43:31,871 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 17:43:31,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-03-18 17:43:31,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/352c8573b/77cb49c8a02f45059cef5bc08cc3841c/FLAG23ae50350 [2022-03-18 17:43:31,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/352c8573b/77cb49c8a02f45059cef5bc08cc3841c [2022-03-18 17:43:31,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 17:43:31,894 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 17:43:31,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 17:43:31,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 17:43:31,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 17:43:31,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:43:31" (1/1) ... [2022-03-18 17:43:31,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e0442d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:31, skipping insertion in model container [2022-03-18 17:43:31,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:43:31" (1/1) ... [2022-03-18 17:43:31,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 17:43:31,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 17:43:32,085 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_13.c[319,332] [2022-03-18 17:43:32,108 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:43:32,114 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 17:43:32,124 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_13.c[319,332] [2022-03-18 17:43:32,128 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:43:32,137 INFO L208 MainTranslator]: Completed translation [2022-03-18 17:43:32,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:32 WrapperNode [2022-03-18 17:43:32,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 17:43:32,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 17:43:32,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 17:43:32,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 17:43:32,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:32" (1/1) ... [2022-03-18 17:43:32,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:32" (1/1) ... [2022-03-18 17:43:32,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:32" (1/1) ... [2022-03-18 17:43:32,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:32" (1/1) ... [2022-03-18 17:43:32,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:32" (1/1) ... [2022-03-18 17:43:32,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:32" (1/1) ... [2022-03-18 17:43:32,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:32" (1/1) ... [2022-03-18 17:43:32,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 17:43:32,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 17:43:32,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 17:43:32,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 17:43:32,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:32" (1/1) ... [2022-03-18 17:43:32,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:43:32,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:32,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 17:43:32,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 17:43:32,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 17:43:32,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 17:43:32,259 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 17:43:32,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 17:43:32,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 17:43:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 17:43:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 17:43:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 17:43:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 17:43:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 17:43:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 17:43:32,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 17:43:32,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 17:43:32,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 17:43:32,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 17:43:32,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 17:43:32,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 17:43:32,320 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 17:43:32,322 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 17:43:32,467 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 17:43:32,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 17:43:32,472 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 17:43:32,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:43:32 BoogieIcfgContainer [2022-03-18 17:43:32,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 17:43:32,474 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 17:43:32,474 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 17:43:32,475 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 17:43:32,477 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:43:32" (1/1) ... [2022-03-18 17:43:32,636 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-18 17:43:32,637 INFO L91 elerationTransformer]: Accelerated Formula: (and (= v_main_~x~0_3 (+ v_main_~x~0_2 1)) (= (+ v_main_~y~0_1 1) v_main_~y~0_2) (< v_main_~z~0_1 v_main_~y~0_2)) InVars {main_~x~0=v_main_~x~0_3, main_~z~0=v_main_~z~0_1, main_~y~0=v_main_~y~0_2} OutVars{main_~x~0=v_main_~x~0_2, main_~z~0=v_main_~z~0_1, main_#t~post5=|v_main_#t~post5_1|, main_~y~0=v_main_~y~0_1, main_#t~post6=|v_main_#t~post6_1|} AuxVars[] AssignedVars[main_~x~0, main_#t~post5, main_~y~0, main_#t~post6] to Formula: (or (and (= |v_main_#t~post5_3| |v_main_#t~post5_1|) (<= v_main_~y~0_2 v_main_~z~0_1) (= v_main_~y~0_2 v_main_~y~0_1) (= |v_main_#t~post6_3| |v_main_#t~post6_1|) (= v_main_~x~0_3 v_main_~x~0_2)) (and (< (+ v_main_~x~0_3 v_main_~z~0_1) (+ v_main_~x~0_2 v_main_~y~0_2 1)) (= (+ v_main_~x~0_2 v_main_~y~0_2) (+ v_main_~x~0_3 v_main_~y~0_1)) (< v_main_~x~0_2 v_main_~x~0_3))) InVars {main_~y~0=v_main_~y~0_2, main_#t~post5=|v_main_#t~post5_3|, main_~x~0=v_main_~x~0_3, main_~z~0=v_main_~z~0_1, main_#t~post6=|v_main_#t~post6_3|} OutVars{main_#t~post5=|v_main_#t~post5_1|, main_~y~0=v_main_~y~0_1, main_~x~0=v_main_~x~0_2, main_~z~0=v_main_~z~0_1, main_#t~post6=|v_main_#t~post6_1|} AuxVars[] AssignedVars[main_~x~0, main_#t~post5, main_~y~0, main_#t~post6] [2022-03-18 17:43:32,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:43:32 BasicIcfg [2022-03-18 17:43:32,642 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 17:43:32,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 17:43:32,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 17:43:32,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 17:43:32,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:43:31" (1/4) ... [2022-03-18 17:43:32,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6852655f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:43:32, skipping insertion in model container [2022-03-18 17:43:32,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:32" (2/4) ... [2022-03-18 17:43:32,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6852655f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:43:32, skipping insertion in model container [2022-03-18 17:43:32,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:43:32" (3/4) ... [2022-03-18 17:43:32,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6852655f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:43:32, skipping insertion in model container [2022-03-18 17:43:32,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:43:32" (4/4) ... [2022-03-18 17:43:32,648 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.cJordan [2022-03-18 17:43:32,652 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 17:43:32,652 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 17:43:32,693 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 17:43:32,700 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 17:43:32,700 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 17:43:32,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 17:43:32,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 17:43:32,717 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:32,718 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:32,719 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash 164364990, now seen corresponding path program 1 times [2022-03-18 17:43:32,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:32,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634600475] [2022-03-18 17:43:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:32,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:32,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:32,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:32,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634600475] [2022-03-18 17:43:32,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634600475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:43:32,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:43:32,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 17:43:32,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494469809] [2022-03-18 17:43:32,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:43:32,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 17:43:32,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:32,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 17:43:32,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:43:32,906 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:32,941 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-03-18 17:43:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 17:43:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 17:43:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:32,949 INFO L225 Difference]: With dead ends: 21 [2022-03-18 17:43:32,949 INFO L226 Difference]: Without dead ends: 14 [2022-03-18 17:43:32,951 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:43:32,956 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:32,957 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-18 17:43:32,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-18 17:43:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-03-18 17:43:32,981 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-03-18 17:43:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:32,982 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-03-18 17:43:32,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-03-18 17:43:32,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 17:43:32,983 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:32,983 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:32,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 17:43:32,984 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash 165288511, now seen corresponding path program 1 times [2022-03-18 17:43:32,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:32,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965272182] [2022-03-18 17:43:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:32,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:33,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:33,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:33,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965272182] [2022-03-18 17:43:33,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965272182] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:43:33,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:43:33,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 17:43:33,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869908767] [2022-03-18 17:43:33,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:43:33,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 17:43:33,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:33,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 17:43:33,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 17:43:33,061 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:33,113 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-03-18 17:43:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 17:43:33,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 17:43:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:33,114 INFO L225 Difference]: With dead ends: 16 [2022-03-18 17:43:33,114 INFO L226 Difference]: Without dead ends: 16 [2022-03-18 17:43:33,114 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 17:43:33,116 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:33,116 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-18 17:43:33,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-18 17:43:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-18 17:43:33,120 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-03-18 17:43:33,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:33,120 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-18 17:43:33,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:33,120 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-18 17:43:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 17:43:33,121 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:33,121 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:33,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 17:43:33,121 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:33,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:33,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1054746269, now seen corresponding path program 1 times [2022-03-18 17:43:33,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:33,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720712917] [2022-03-18 17:43:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:33,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:33,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:33,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:33,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720712917] [2022-03-18 17:43:33,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720712917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:43:33,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:43:33,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 17:43:33,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831934112] [2022-03-18 17:43:33,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:43:33,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 17:43:33,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:33,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 17:43:33,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 17:43:33,216 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:33,261 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-03-18 17:43:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 17:43:33,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 17:43:33,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:33,264 INFO L225 Difference]: With dead ends: 17 [2022-03-18 17:43:33,264 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 17:43:33,267 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 17:43:33,268 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:33,269 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 17:43:33,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 17:43:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:33,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-18 17:43:33,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-03-18 17:43:33,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:33,272 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-18 17:43:33,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-18 17:43:33,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 17:43:33,273 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:33,273 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:33,273 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 17:43:33,273 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:33,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1687477607, now seen corresponding path program 1 times [2022-03-18 17:43:33,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:33,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220876634] [2022-03-18 17:43:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:33,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:33,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:33,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:33,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220876634] [2022-03-18 17:43:33,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220876634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:33,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328233255] [2022-03-18 17:43:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:33,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:33,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:33,319 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:33,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 17:43:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:33,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 17:43:33,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:33,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:33,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328233255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:33,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:33,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 17:43:33,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973021029] [2022-03-18 17:43:33,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:33,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 17:43:33,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 17:43:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 17:43:33,461 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:33,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:33,526 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-03-18 17:43:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 17:43:33,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-18 17:43:33,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:33,527 INFO L225 Difference]: With dead ends: 21 [2022-03-18 17:43:33,527 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 17:43:33,528 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-18 17:43:33,528 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:33,529 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 25 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:33,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 17:43:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-03-18 17:43:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-18 17:43:33,532 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2022-03-18 17:43:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:33,533 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-18 17:43:33,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-18 17:43:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 17:43:33,533 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:33,534 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:33,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:33,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:33,748 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:33,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:33,748 INFO L85 PathProgramCache]: Analyzing trace with hash 987258878, now seen corresponding path program 1 times [2022-03-18 17:43:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:33,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099003303] [2022-03-18 17:43:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:33,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:33,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:33,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:33,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099003303] [2022-03-18 17:43:33,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099003303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:33,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727398768] [2022-03-18 17:43:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:33,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:33,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:33,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:33,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 17:43:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:33,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 17:43:33,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:33,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:33,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727398768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:33,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:33,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 17:43:33,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956745869] [2022-03-18 17:43:33,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:33,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 17:43:33,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:33,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 17:43:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 17:43:33,968 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:34,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:34,075 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-03-18 17:43:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 17:43:34,075 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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 19 [2022-03-18 17:43:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:34,077 INFO L225 Difference]: With dead ends: 28 [2022-03-18 17:43:34,077 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 17:43:34,079 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-18 17:43:34,079 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:34,083 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 41 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:34,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 17:43:34,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-18 17:43:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-18 17:43:34,086 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-03-18 17:43:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:34,087 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-18 17:43:34,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-18 17:43:34,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 17:43:34,088 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:34,088 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:34,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:34,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:34,292 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1768540306, now seen corresponding path program 2 times [2022-03-18 17:43:34,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:34,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974686184] [2022-03-18 17:43:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:34,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:34,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:34,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:34,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974686184] [2022-03-18 17:43:34,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974686184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:34,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272906751] [2022-03-18 17:43:34,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 17:43:34,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:34,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:34,414 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:34,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 17:43:34,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 17:43:34,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 17:43:34,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:34,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:34,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272906751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:34,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:34,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 17:43:34,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314782022] [2022-03-18 17:43:34,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:34,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 17:43:34,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:34,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 17:43:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-18 17:43:34,690 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:34,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:34,923 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-03-18 17:43:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 17:43:34,924 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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 27 [2022-03-18 17:43:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:34,925 INFO L225 Difference]: With dead ends: 44 [2022-03-18 17:43:34,925 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 17:43:34,926 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-18 17:43:34,929 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:34,932 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 36 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:43:34,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 17:43:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-18 17:43:34,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-18 17:43:34,947 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2022-03-18 17:43:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:34,948 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-18 17:43:34,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-18 17:43:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 17:43:34,949 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:34,949 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:34,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:35,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:35,160 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1912510030, now seen corresponding path program 3 times [2022-03-18 17:43:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:35,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990847475] [2022-03-18 17:43:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:35,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:35,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:35,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:35,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990847475] [2022-03-18 17:43:35,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990847475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:35,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992978555] [2022-03-18 17:43:35,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 17:43:35,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:35,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:35,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:35,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 17:43:35,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 17:43:35,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:35,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 17:43:35,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-18 17:43:35,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-18 17:43:35,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992978555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:35,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:35,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4, 4] total 22 [2022-03-18 17:43:35,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080444411] [2022-03-18 17:43:35,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:35,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 17:43:35,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:35,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 17:43:35,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-03-18 17:43:35,598 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:35,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:35,929 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-03-18 17:43:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 17:43:35,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 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 43 [2022-03-18 17:43:35,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:35,931 INFO L225 Difference]: With dead ends: 52 [2022-03-18 17:43:35,931 INFO L226 Difference]: Without dead ends: 52 [2022-03-18 17:43:35,932 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 17:43:35,933 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:35,933 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 55 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:43:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-18 17:43:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-18 17:43:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-03-18 17:43:35,938 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 43 [2022-03-18 17:43:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:35,938 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-03-18 17:43:35,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-03-18 17:43:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 17:43:35,939 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:35,939 INFO L500 BasicCegarLoop]: trace histogram [19, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:35,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:36,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:36,154 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:36,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:36,155 INFO L85 PathProgramCache]: Analyzing trace with hash -362676773, now seen corresponding path program 4 times [2022-03-18 17:43:36,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:36,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059827171] [2022-03-18 17:43:36,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:36,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:36,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 17:43:36,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:36,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059827171] [2022-03-18 17:43:36,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059827171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:36,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922940082] [2022-03-18 17:43:36,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 17:43:36,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:36,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:36,353 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:36,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 17:43:36,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 17:43:36,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:36,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 17:43:36,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 17:43:36,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 17:43:36,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922940082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:36,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:36,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-18 17:43:36,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493393523] [2022-03-18 17:43:36,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:36,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 17:43:36,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:36,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 17:43:36,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 17:43:36,936 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:37,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:37,534 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-03-18 17:43:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 17:43:37,535 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 51 [2022-03-18 17:43:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:37,536 INFO L225 Difference]: With dead ends: 86 [2022-03-18 17:43:37,536 INFO L226 Difference]: Without dead ends: 86 [2022-03-18 17:43:37,539 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 17:43:37,539 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:37,540 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 46 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:43:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-18 17:43:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-18 17:43:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 81 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2022-03-18 17:43:37,545 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 51 [2022-03-18 17:43:37,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:37,546 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2022-03-18 17:43:37,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:37,546 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2022-03-18 17:43:37,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 17:43:37,547 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:37,548 INFO L500 BasicCegarLoop]: trace histogram [36, 32, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:37,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:37,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:37,770 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:37,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:37,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1173916663, now seen corresponding path program 5 times [2022-03-18 17:43:37,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:37,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082674231] [2022-03-18 17:43:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:37,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:38,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 231 proven. 1056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 17:43:38,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:38,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082674231] [2022-03-18 17:43:38,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082674231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:38,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398942636] [2022-03-18 17:43:38,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 17:43:38,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:38,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:38,320 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:38,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 17:43:38,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2022-03-18 17:43:38,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:38,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 17:43:38,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 231 proven. 1056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 17:43:38,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 231 proven. 1056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 17:43:39,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398942636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:39,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:39,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-18 17:43:39,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732656363] [2022-03-18 17:43:39,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:39,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 17:43:39,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:39,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 17:43:39,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 17:43:39,915 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:41,742 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2022-03-18 17:43:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 17:43:41,743 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 85 [2022-03-18 17:43:41,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:41,744 INFO L225 Difference]: With dead ends: 154 [2022-03-18 17:43:41,744 INFO L226 Difference]: Without dead ends: 154 [2022-03-18 17:43:41,748 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 17:43:41,748 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:41,749 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 31 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 17:43:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-18 17:43:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-03-18 17:43:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0402684563758389) internal successors, (155), 149 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 159 transitions. [2022-03-18 17:43:41,756 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 159 transitions. Word has length 85 [2022-03-18 17:43:41,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:41,757 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 159 transitions. [2022-03-18 17:43:41,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 159 transitions. [2022-03-18 17:43:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-18 17:43:41,759 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:41,759 INFO L500 BasicCegarLoop]: trace histogram [70, 66, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:41,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-18 17:43:41,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:41,963 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:41,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1228657455, now seen corresponding path program 6 times [2022-03-18 17:43:41,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:41,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496605375] [2022-03-18 17:43:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:41,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:43,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 469 proven. 4422 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 17:43:43,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:43,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496605375] [2022-03-18 17:43:43,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496605375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:43,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651314111] [2022-03-18 17:43:43,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 17:43:43,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:43,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:43,572 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:43,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 17:43:43,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-18 17:43:43,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:43,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 17:43:43,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 594 proven. 16 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-03-18 17:43:44,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 594 proven. 16 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-03-18 17:43:44,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651314111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:44,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:44,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 7, 7] total 80 [2022-03-18 17:43:44,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305800158] [2022-03-18 17:43:44,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:44,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-18 17:43:44,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:44,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-18 17:43:44,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 17:43:44,444 INFO L87 Difference]: Start difference. First operand 154 states and 159 transitions. Second operand has 80 states, 80 states have (on average 2.1125) internal successors, (169), 79 states have internal predecessors, (169), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:46,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:46,866 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2022-03-18 17:43:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-18 17:43:46,866 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1125) internal successors, (169), 79 states have internal predecessors, (169), 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 153 [2022-03-18 17:43:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:46,867 INFO L225 Difference]: With dead ends: 168 [2022-03-18 17:43:46,868 INFO L226 Difference]: Without dead ends: 168 [2022-03-18 17:43:46,873 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2998 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-03-18 17:43:46,874 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 162 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:46,874 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 60 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 17:43:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-18 17:43:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-03-18 17:43:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0736196319018405) internal successors, (175), 163 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 179 transitions. [2022-03-18 17:43:46,882 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 179 transitions. Word has length 153 [2022-03-18 17:43:46,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:46,882 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 179 transitions. [2022-03-18 17:43:46,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1125) internal successors, (169), 79 states have internal predecessors, (169), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:46,883 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 179 transitions. [2022-03-18 17:43:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-18 17:43:46,884 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:46,885 INFO L500 BasicCegarLoop]: trace histogram [77, 67, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:46,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:47,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:47,089 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:47,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:47,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1970638163, now seen corresponding path program 7 times [2022-03-18 17:43:47,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:47,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110081241] [2022-03-18 17:43:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:47,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:48,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5930 backedges. 1292 proven. 4556 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-18 17:43:48,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:48,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110081241] [2022-03-18 17:43:48,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110081241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:48,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412531495] [2022-03-18 17:43:48,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 17:43:48,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:48,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:48,685 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:48,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 17:43:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:48,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 17:43:48,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5930 backedges. 1292 proven. 4556 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-18 17:43:49,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5930 backedges. 1292 proven. 4556 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-18 17:43:53,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412531495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:53,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:53,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-18 17:43:53,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983441618] [2022-03-18 17:43:53,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:53,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-18 17:43:53,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:53,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-18 17:43:53,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 17:43:53,481 INFO L87 Difference]: Start difference. First operand 168 states and 179 transitions. Second operand has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:59,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:59,696 INFO L93 Difference]: Finished difference Result 306 states and 317 transitions. [2022-03-18 17:43:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-18 17:43:59,697 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 167 [2022-03-18 17:43:59,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:59,698 INFO L225 Difference]: With dead ends: 306 [2022-03-18 17:43:59,698 INFO L226 Difference]: Without dead ends: 306 [2022-03-18 17:43:59,704 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-18 17:43:59,704 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:59,705 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 41 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 17:43:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-03-18 17:43:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-03-18 17:43:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.0398671096345515) internal successors, (313), 301 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 317 transitions. [2022-03-18 17:43:59,716 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 317 transitions. Word has length 167 [2022-03-18 17:43:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:59,717 INFO L478 AbstractCegarLoop]: Abstraction has 306 states and 317 transitions. [2022-03-18 17:43:59,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 317 transitions. [2022-03-18 17:43:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-03-18 17:43:59,720 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:59,721 INFO L500 BasicCegarLoop]: trace histogram [146, 136, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:59,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:59,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 17:43:59,937 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:59,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:59,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1436809081, now seen corresponding path program 8 times [2022-03-18 17:43:59,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:59,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350292796] [2022-03-18 17:43:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:59,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:44:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:44:05,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:44:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:44:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21317 backedges. 2603 proven. 18632 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-18 17:44:05,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:44:05,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350292796] [2022-03-18 17:44:05,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350292796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:44:05,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886126497] [2022-03-18 17:44:05,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 17:44:05,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:44:05,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:44:05,756 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:44:05,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 17:44:05,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 17:44:05,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:44:05,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-18 17:44:05,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:44:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21317 backedges. 2603 proven. 18632 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-18 17:44:06,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:44:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21317 backedges. 2603 proven. 18632 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-18 17:44:23,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886126497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:44:23,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:44:23,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-18 17:44:23,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562016686] [2022-03-18 17:44:23,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:44:23,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-18 17:44:23,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:44:23,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-18 17:44:23,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-18 17:44:23,129 INFO L87 Difference]: Start difference. First operand 306 states and 317 transitions. Second operand has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:44:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:44:46,600 INFO L93 Difference]: Finished difference Result 582 states and 593 transitions. [2022-03-18 17:44:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-18 17:44:46,601 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 305 [2022-03-18 17:44:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:44:46,603 INFO L225 Difference]: With dead ends: 582 [2022-03-18 17:44:46,603 INFO L226 Difference]: Without dead ends: 582 [2022-03-18 17:44:46,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-18 17:44:46,618 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 284 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 17:44:46,618 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 61 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 17:44:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-03-18 17:44:46,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2022-03-18 17:44:46,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 577 states have (on average 1.0207972270363952) internal successors, (589), 577 states have internal predecessors, (589), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:44:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 593 transitions. [2022-03-18 17:44:46,632 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 593 transitions. Word has length 305 [2022-03-18 17:44:46,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:44:46,633 INFO L478 AbstractCegarLoop]: Abstraction has 582 states and 593 transitions. [2022-03-18 17:44:46,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:44:46,634 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 593 transitions. [2022-03-18 17:44:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2022-03-18 17:44:46,642 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:44:46,642 INFO L500 BasicCegarLoop]: trace histogram [284, 274, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:44:46,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-18 17:44:46,865 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:44:46,866 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:44:46,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:44:46,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1080022033, now seen corresponding path program 9 times [2022-03-18 17:44:46,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:44:46,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243123793] [2022-03-18 17:44:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:44:46,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:44:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:09,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:45:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 80657 backedges. 5225 proven. 75350 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-18 17:45:09,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:45:09,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243123793] [2022-03-18 17:45:09,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243123793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:45:09,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296164012] [2022-03-18 17:45:09,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 17:45:09,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:45:09,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:45:09,172 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:45:09,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 17:45:09,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-18 17:45:09,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:45:09,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 17:45:09,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:45:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 80657 backedges. 5754 proven. 100 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-03-18 17:45:11,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:45:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 80657 backedges. 5754 proven. 100 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-03-18 17:45:14,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296164012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:45:14,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:45:14,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 13, 13] total 300 [2022-03-18 17:45:14,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351985636] [2022-03-18 17:45:14,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:45:14,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 300 states [2022-03-18 17:45:14,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:45:14,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 300 interpolants. [2022-03-18 17:45:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44553, Invalid=45147, Unknown=0, NotChecked=0, Total=89700 [2022-03-18 17:45:14,058 INFO L87 Difference]: Start difference. First operand 582 states and 593 transitions. Second operand has 300 states, 300 states have (on average 2.03) internal successors, (609), 299 states have internal predecessors, (609), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:45:46,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:45:46,357 INFO L93 Difference]: Finished difference Result 608 states and 631 transitions. [2022-03-18 17:45:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2022-03-18 17:45:46,358 INFO L78 Accepts]: Start accepts. Automaton has has 300 states, 300 states have (on average 2.03) internal successors, (609), 299 states have internal predecessors, (609), 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 581 [2022-03-18 17:45:46,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:45:46,361 INFO L225 Difference]: With dead ends: 608 [2022-03-18 17:45:46,361 INFO L226 Difference]: Without dead ends: 608 [2022-03-18 17:45:46,378 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1758 GetRequests, 1163 SyntacticMatches, 0 SemanticMatches, 595 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44275 ImplicationChecksByTransitivity, 54.4s TimeCoverageRelationStatistics Valid=133653, Invalid=222159, Unknown=0, NotChecked=0, Total=355812 [2022-03-18 17:45:46,378 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 888 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 1528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1528 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 17:45:46,379 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 30 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1528 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 17:45:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-03-18 17:45:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2022-03-18 17:45:46,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 603 states have (on average 1.0398009950248757) internal successors, (627), 603 states have internal predecessors, (627), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:45:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 631 transitions. [2022-03-18 17:45:46,388 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 631 transitions. Word has length 581 [2022-03-18 17:45:46,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:45:46,389 INFO L478 AbstractCegarLoop]: Abstraction has 608 states and 631 transitions. [2022-03-18 17:45:46,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 300 states, 300 states have (on average 2.03) internal successors, (609), 299 states have internal predecessors, (609), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:45:46,390 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 631 transitions. [2022-03-18 17:45:46,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2022-03-18 17:45:46,400 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:45:46,400 INFO L500 BasicCegarLoop]: trace histogram [297, 275, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:45:46,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-18 17:45:46,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 17:45:46,614 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:45:46,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:45:46,615 INFO L85 PathProgramCache]: Analyzing trace with hash -929114959, now seen corresponding path program 10 times [2022-03-18 17:45:46,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:45:46,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397328159] [2022-03-18 17:45:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:45:46,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:45:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:46:09,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:46:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:46:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 88210 backedges. 11868 proven. 75900 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-18 17:46:09,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:46:09,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397328159] [2022-03-18 17:46:09,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397328159] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:46:09,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249040825] [2022-03-18 17:46:09,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 17:46:09,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:46:09,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:46:09,483 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:46:09,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 17:46:09,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 17:46:09,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:46:09,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-18 17:46:09,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:46:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 88210 backedges. 11868 proven. 75900 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-18 17:46:10,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:47:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 88210 backedges. 11868 proven. 75900 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-18 17:47:19,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249040825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:47:19,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:47:19,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-18 17:47:19,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021948962] [2022-03-18 17:47:19,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:47:19,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-18 17:47:19,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:47:19,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-18 17:47:19,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-18 17:47:19,220 INFO L87 Difference]: Start difference. First operand 608 states and 631 transitions. Second operand has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:48:58,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:48:58,205 INFO L93 Difference]: Finished difference Result 1162 states and 1185 transitions. [2022-03-18 17:48:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-18 17:48:58,206 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 607 [2022-03-18 17:48:58,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:48:58,210 INFO L225 Difference]: With dead ends: 1162 [2022-03-18 17:48:58,210 INFO L226 Difference]: Without dead ends: 1162 [2022-03-18 17:48:58,277 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2045 GetRequests, 939 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 181.9s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-18 17:48:58,277 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 562 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:48:58,278 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 51 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 17:48:58,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-03-18 17:48:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1162. [2022-03-18 17:48:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1157 states have (on average 1.020743301642178) internal successors, (1181), 1157 states have internal predecessors, (1181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:48:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1185 transitions. [2022-03-18 17:48:58,293 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1185 transitions. Word has length 607 [2022-03-18 17:48:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:48:58,294 INFO L478 AbstractCegarLoop]: Abstraction has 1162 states and 1185 transitions. [2022-03-18 17:48:58,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:48:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1185 transitions. [2022-03-18 17:48:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1162 [2022-03-18 17:48:58,304 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:48:58,305 INFO L500 BasicCegarLoop]: trace histogram [574, 552, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:48:58,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-18 17:48:58,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 17:48:58,506 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:48:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:48:58,506 INFO L85 PathProgramCache]: Analyzing trace with hash 683431997, now seen corresponding path program 11 times [2022-03-18 17:48:58,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:48:58,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532631733] [2022-03-18 17:48:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:48:58,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:48:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:50:31,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:50:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:50:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 329477 backedges. 23779 proven. 305256 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-18 17:50:31,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:50:31,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532631733] [2022-03-18 17:50:31,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532631733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:50:31,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896363179] [2022-03-18 17:50:31,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 17:50:31,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:50:31,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:50:31,989 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:50:31,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 17:50:34,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 575 check-sat command(s) [2022-03-18 17:50:34,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:50:34,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 2397 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-18 17:50:34,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:50:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 329477 backedges. 23779 proven. 305256 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-18 17:50:35,962 INFO L328 TraceCheckSpWp]: Computing backward predicates...