/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-7968f31 [2022-03-17 15:27:48,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:27:48,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:27:48,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 15:27:48,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 15:27:48,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 15:27:48,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 15:27:48,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 15:27:48,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 15:27:48,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 15:27:48,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 15:27:48,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 15:27:48,426 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 15:27:48,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 15:27:48,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 15:27:48,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 15:27:48,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 15:27:48,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 15:27:48,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 15:27:48,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 15:27:48,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 15:27:48,441 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:27:48,450 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:27:48,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:27:48,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:27:48,451 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:27:48,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:27:48,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:27:48,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:27:48,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:27:48,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:27:48,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:27:48,452 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:27:48,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:27:48,452 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:27:48,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:27:48,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:27:48,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:27:48,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:27:48,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:27:48,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:27:48,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:27:48,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:27:48,453 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:27:48,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:27:48,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:27:48,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:27:48,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:27:48,627 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:27:48,627 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:27:48,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-03-17 15:27:48,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac5e7c94a/2f9d598426814a598a1de1a8b107d314/FLAGef4b1c1aa [2022-03-17 15:27:48,992 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:27:48,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-03-17 15:27:48,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac5e7c94a/2f9d598426814a598a1de1a8b107d314/FLAGef4b1c1aa [2022-03-17 15:27:49,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac5e7c94a/2f9d598426814a598a1de1a8b107d314 [2022-03-17 15:27:49,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:27:49,444 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:27:49,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:27:49,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:27:49,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:27:49,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:27:49" (1/1) ... [2022-03-17 15:27:49,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a6e45d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:27:49, skipping insertion in model container [2022-03-17 15:27:49,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:27:49" (1/1) ... [2022-03-17 15:27:49,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:27:49,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:27:49,551 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] [2022-03-17 15:27:49,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:27:49,578 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:27:49,588 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] [2022-03-17 15:27:49,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:27:49,598 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:27:49,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:27:49 WrapperNode [2022-03-17 15:27:49,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:27:49,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:27:49,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:27:49,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:27:49,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:27:49" (1/1) ... [2022-03-17 15:27:49,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:27:49" (1/1) ... [2022-03-17 15:27:49,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:27:49" (1/1) ... [2022-03-17 15:27:49,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:27:49" (1/1) ... [2022-03-17 15:27:49,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:27:49" (1/1) ... [2022-03-17 15:27:49,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:27:49" (1/1) ... [2022-03-17 15:27:49,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:27:49" (1/1) ... [2022-03-17 15:27:49,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:27:49,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:27:49,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:27:49,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:27:49,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:27:49" (1/1) ... [2022-03-17 15:27:49,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:27:49,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:27:49,673 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) [2022-03-17 15:27:49,675 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 [2022-03-17 15:27:49,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:27:49,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:27:49,714 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:27:49,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 15:27:49,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:27:49,714 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:27:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:27:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:27:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:27:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:27:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:27:49,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:27:49,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:27:49,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:27:49,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:27:49,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:27:49,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:27:49,760 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:27:49,762 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:27:49,860 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:27:49,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:27:49,864 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 15:27:49,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:27:49 BoogieIcfgContainer [2022-03-17 15:27:49,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:27:49,867 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:27:49,867 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:27:49,867 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:27:49,870 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:27:49" (1/1) ... [2022-03-17 15:27:50,018 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 [2022-03-17 15:27:50,019 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] [2022-03-17 15:27:50,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:27:50 BasicIcfg [2022-03-17 15:27:50,024 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:27:50,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:27:50,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:27:50,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:27:50,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:27:49" (1/4) ... [2022-03-17 15:27:50,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fe2f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:27:50, skipping insertion in model container [2022-03-17 15:27:50,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:27:49" (2/4) ... [2022-03-17 15:27:50,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fe2f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:27:50, skipping insertion in model container [2022-03-17 15:27:50,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:27:49" (3/4) ... [2022-03-17 15:27:50,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fe2f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:27:50, skipping insertion in model container [2022-03-17 15:27:50,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:27:50" (4/4) ... [2022-03-17 15:27:50,036 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.cJordan [2022-03-17 15:27:50,040 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:27:50,040 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:27:50,069 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:27:50,074 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 [2022-03-17 15:27:50,074 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:27:50,083 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) [2022-03-17 15:27:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 15:27:50,088 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:27:50,088 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:27:50,089 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:27:50,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:27:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash 164364990, now seen corresponding path program 1 times [2022-03-17 15:27:50,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:27:50,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698413184] [2022-03-17 15:27:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:27:50,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:27:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:50,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:27:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:27:50,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:27:50,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698413184] [2022-03-17 15:27:50,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698413184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:27:50,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:27:50,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 15:27:50,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457598405] [2022-03-17 15:27:50,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:27:50,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 15:27:50,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:27:50,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 15:27:50,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:27:50,219 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) [2022-03-17 15:27:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:27:50,258 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-03-17 15:27:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 15:27:50,262 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 [2022-03-17 15:27:50,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:27:50,278 INFO L225 Difference]: With dead ends: 21 [2022-03-17 15:27:50,279 INFO L226 Difference]: Without dead ends: 14 [2022-03-17 15:27:50,280 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 [2022-03-17 15:27:50,282 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 [2022-03-17 15:27:50,283 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] [2022-03-17 15:27:50,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-17 15:27:50,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-17 15:27:50,305 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) [2022-03-17 15:27:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-03-17 15:27:50,306 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-03-17 15:27:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:27:50,307 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-03-17 15:27:50,307 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) [2022-03-17 15:27:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-03-17 15:27:50,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 15:27:50,308 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:27:50,308 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:27:50,308 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:27:50,309 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:27:50,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:27:50,311 INFO L85 PathProgramCache]: Analyzing trace with hash 165288511, now seen corresponding path program 1 times [2022-03-17 15:27:50,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:27:50,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76632026] [2022-03-17 15:27:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:27:50,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:27:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:50,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:27:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:27:50,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:27:50,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76632026] [2022-03-17 15:27:50,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76632026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:27:50,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:27:50,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 15:27:50,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159379153] [2022-03-17 15:27:50,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:27:50,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 15:27:50,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:27:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 15:27:50,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 15:27:50,415 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) [2022-03-17 15:27:50,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:27:50,451 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-03-17 15:27:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 15:27:50,452 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 [2022-03-17 15:27:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:27:50,452 INFO L225 Difference]: With dead ends: 16 [2022-03-17 15:27:50,452 INFO L226 Difference]: Without dead ends: 16 [2022-03-17 15:27:50,456 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 [2022-03-17 15:27:50,460 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 [2022-03-17 15:27:50,460 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] [2022-03-17 15:27:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-17 15:27:50,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-17 15:27:50,469 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) [2022-03-17 15:27:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-17 15:27:50,470 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-03-17 15:27:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:27:50,471 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-17 15:27:50,471 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) [2022-03-17 15:27:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-17 15:27:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 15:27:50,474 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:27:50,474 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:27:50,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 15:27:50,474 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:27:50,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:27:50,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1054746269, now seen corresponding path program 1 times [2022-03-17 15:27:50,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:27:50,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864048273] [2022-03-17 15:27:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:27:50,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:27:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:50,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:27:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:27:50,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:27:50,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864048273] [2022-03-17 15:27:50,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864048273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:27:50,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:27:50,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 15:27:50,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570552876] [2022-03-17 15:27:50,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:27:50,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 15:27:50,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:27:50,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 15:27:50,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 15:27:50,542 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) [2022-03-17 15:27:50,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:27:50,569 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-03-17 15:27:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 15:27:50,569 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 [2022-03-17 15:27:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:27:50,570 INFO L225 Difference]: With dead ends: 17 [2022-03-17 15:27:50,570 INFO L226 Difference]: Without dead ends: 17 [2022-03-17 15:27:50,572 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 [2022-03-17 15:27:50,572 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 [2022-03-17 15:27:50,573 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] [2022-03-17 15:27:50,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-17 15:27:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-17 15:27:50,574 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) [2022-03-17 15:27:50,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-17 15:27:50,575 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-03-17 15:27:50,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:27:50,575 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-17 15:27:50,575 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) [2022-03-17 15:27:50,575 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-17 15:27:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-17 15:27:50,575 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:27:50,576 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:27:50,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 15:27:50,576 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:27:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:27:50,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1687477607, now seen corresponding path program 1 times [2022-03-17 15:27:50,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:27:50,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138331051] [2022-03-17 15:27:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:27:50,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:27:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:50,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:27:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:27:50,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:27:50,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138331051] [2022-03-17 15:27:50,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138331051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:27:50,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698950555] [2022-03-17 15:27:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:27:50,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:27:50,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:27:50,648 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) [2022-03-17 15:27:50,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 15:27:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:50,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 15:27:50,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:27:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:27:50,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:27:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:27:50,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698950555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:27:50,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:27:50,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-17 15:27:50,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104741731] [2022-03-17 15:27:50,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:27:50,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 15:27:50,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:27:50,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 15:27:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-17 15:27:50,794 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) [2022-03-17 15:27:50,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:27:50,891 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-03-17 15:27:50,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 15:27:50,892 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 [2022-03-17 15:27:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:27:50,892 INFO L225 Difference]: With dead ends: 21 [2022-03-17 15:27:50,892 INFO L226 Difference]: Without dead ends: 21 [2022-03-17 15:27:50,893 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 [2022-03-17 15:27:50,893 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 [2022-03-17 15:27:50,894 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] [2022-03-17 15:27:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-17 15:27:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-03-17 15:27:50,895 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) [2022-03-17 15:27:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-17 15:27:50,896 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2022-03-17 15:27:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:27:50,896 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-17 15:27:50,896 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) [2022-03-17 15:27:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-17 15:27:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-17 15:27:50,897 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:27:50,897 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:27:50,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 15:27:51,113 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 [2022-03-17 15:27:51,114 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:27:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:27:51,114 INFO L85 PathProgramCache]: Analyzing trace with hash 987258878, now seen corresponding path program 1 times [2022-03-17 15:27:51,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:27:51,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268266552] [2022-03-17 15:27:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:27:51,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:27:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:51,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:27:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:27:51,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:27:51,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268266552] [2022-03-17 15:27:51,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268266552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:27:51,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027798454] [2022-03-17 15:27:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:27:51,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:27:51,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:27:51,159 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) [2022-03-17 15:27:51,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 15:27:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:51,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 15:27:51,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:27:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:27:51,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:27:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:27:51,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027798454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:27:51,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:27:51,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-17 15:27:51,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500590037] [2022-03-17 15:27:51,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:27:51,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 15:27:51,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:27:51,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 15:27:51,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-17 15:27:51,312 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) [2022-03-17 15:27:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:27:51,392 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-03-17 15:27:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 15:27:51,392 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 [2022-03-17 15:27:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:27:51,393 INFO L225 Difference]: With dead ends: 28 [2022-03-17 15:27:51,393 INFO L226 Difference]: Without dead ends: 28 [2022-03-17 15:27:51,393 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 [2022-03-17 15:27:51,394 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 [2022-03-17 15:27:51,394 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] [2022-03-17 15:27:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-17 15:27:51,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-17 15:27:51,396 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) [2022-03-17 15:27:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-17 15:27:51,396 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-03-17 15:27:51,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:27:51,397 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-17 15:27:51,397 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) [2022-03-17 15:27:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-17 15:27:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 15:27:51,397 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:27:51,397 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:27:51,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 15:27:51,611 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 [2022-03-17 15:27:51,611 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:27:51,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:27:51,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1768540306, now seen corresponding path program 2 times [2022-03-17 15:27:51,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:27:51,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159695130] [2022-03-17 15:27:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:27:51,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:27:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:51,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:27:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:27:51,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:27:51,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159695130] [2022-03-17 15:27:51,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159695130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:27:51,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585132455] [2022-03-17 15:27:51,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 15:27:51,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:27:51,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:27:51,676 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) [2022-03-17 15:27:51,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 15:27:51,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 15:27:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:27:51,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 15:27:51,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:27:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:27:51,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:27:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:27:51,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585132455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:27:51,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:27:51,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-17 15:27:51,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767051443] [2022-03-17 15:27:51,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:27:51,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 15:27:51,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:27:51,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 15:27:51,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:27:51,854 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) [2022-03-17 15:27:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:27:52,033 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-03-17 15:27:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 15:27:52,033 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 [2022-03-17 15:27:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:27:52,034 INFO L225 Difference]: With dead ends: 44 [2022-03-17 15:27:52,034 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 15:27:52,034 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-17 15:27:52,035 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:27:52,035 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 36 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:27:52,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 15:27:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-17 15:27:52,037 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) [2022-03-17 15:27:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-17 15:27:52,038 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2022-03-17 15:27:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:27:52,038 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-17 15:27:52,038 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) [2022-03-17 15:27:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-17 15:27:52,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-17 15:27:52,039 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:27:52,039 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:27:52,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 15:27:52,256 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 [2022-03-17 15:27:52,257 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:27:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:27:52,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1912510030, now seen corresponding path program 3 times [2022-03-17 15:27:52,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:27:52,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476158678] [2022-03-17 15:27:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:27:52,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:27:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:52,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:27:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:27:52,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:27:52,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476158678] [2022-03-17 15:27:52,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476158678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:27:52,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402213767] [2022-03-17 15:27:52,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 15:27:52,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:27:52,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:27:52,441 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) [2022-03-17 15:27:52,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 15:27:52,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 15:27:52,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:27:52,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 15:27:52,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:27:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-17 15:27:52,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:27:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-17 15:27:52,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402213767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:27:52,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:27:52,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4, 4] total 22 [2022-03-17 15:27:52,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325711677] [2022-03-17 15:27:52,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:27:52,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 15:27:52,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:27:52,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 15:27:52,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-03-17 15:27:52,622 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) [2022-03-17 15:27:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:27:52,917 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-03-17 15:27:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-17 15:27:52,917 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 [2022-03-17 15:27:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:27:52,918 INFO L225 Difference]: With dead ends: 52 [2022-03-17 15:27:52,919 INFO L226 Difference]: Without dead ends: 52 [2022-03-17 15:27:52,919 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 [2022-03-17 15:27:52,920 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 [2022-03-17 15:27:52,920 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] [2022-03-17 15:27:52,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-17 15:27:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-17 15:27:52,923 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) [2022-03-17 15:27:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-03-17 15:27:52,924 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 43 [2022-03-17 15:27:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:27:52,924 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-03-17 15:27:52,924 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) [2022-03-17 15:27:52,924 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-03-17 15:27:52,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-17 15:27:52,925 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:27:52,925 INFO L500 BasicCegarLoop]: trace histogram [19, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:27:52,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 15:27:53,142 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 [2022-03-17 15:27:53,142 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:27:53,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:27:53,143 INFO L85 PathProgramCache]: Analyzing trace with hash -362676773, now seen corresponding path program 4 times [2022-03-17 15:27:53,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:27:53,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126783098] [2022-03-17 15:27:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:27:53,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:27:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:53,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:27:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 15:27:53,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:27:53,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126783098] [2022-03-17 15:27:53,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126783098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:27:53,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319499693] [2022-03-17 15:27:53,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 15:27:53,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:27:53,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:27:53,301 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) [2022-03-17 15:27:53,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 15:27:53,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 15:27:53,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:27:53,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-17 15:27:53,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:27:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 15:27:53,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:27:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 15:27:53,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319499693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:27:53,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:27:53,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-17 15:27:53,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307712757] [2022-03-17 15:27:53,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:27:53,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-17 15:27:53,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:27:53,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-17 15:27:53,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-17 15:27:53,765 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) [2022-03-17 15:27:54,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:27:54,200 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-03-17 15:27:54,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-17 15:27:54,200 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 [2022-03-17 15:27:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:27:54,217 INFO L225 Difference]: With dead ends: 86 [2022-03-17 15:27:54,217 INFO L226 Difference]: Without dead ends: 86 [2022-03-17 15:27:54,219 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-17 15:27:54,219 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 [2022-03-17 15:27:54,219 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] [2022-03-17 15:27:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-17 15:27:54,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-17 15:27:54,223 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) [2022-03-17 15:27:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2022-03-17 15:27:54,224 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 51 [2022-03-17 15:27:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:27:54,224 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2022-03-17 15:27:54,224 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) [2022-03-17 15:27:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2022-03-17 15:27:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-17 15:27:54,226 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:27:54,226 INFO L500 BasicCegarLoop]: trace histogram [36, 32, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:27:54,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 15:27:54,426 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 [2022-03-17 15:27:54,427 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:27:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:27:54,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1173916663, now seen corresponding path program 5 times [2022-03-17 15:27:54,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:27:54,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376525932] [2022-03-17 15:27:54,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:27:54,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:27:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:54,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:27:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 231 proven. 1056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 15:27:54,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:27:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376525932] [2022-03-17 15:27:54,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376525932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:27:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515514246] [2022-03-17 15:27:54,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 15:27:54,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:27:54,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:27:54,872 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) [2022-03-17 15:27:54,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 15:27:54,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2022-03-17 15:27:54,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:27:54,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-17 15:27:54,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:27:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 231 proven. 1056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 15:27:55,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:27:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 231 proven. 1056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 15:27:56,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515514246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:27:56,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:27:56,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-17 15:27:56,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038580040] [2022-03-17 15:27:56,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:27:56,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-17 15:27:56,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:27:56,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-17 15:27:56,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-17 15:27:56,140 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) [2022-03-17 15:27:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:27:57,911 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2022-03-17 15:27:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-17 15:27:57,912 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 [2022-03-17 15:27:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:27:57,913 INFO L225 Difference]: With dead ends: 154 [2022-03-17 15:27:57,913 INFO L226 Difference]: Without dead ends: 154 [2022-03-17 15:27:57,916 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-17 15:27:57,916 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 [2022-03-17 15:27:57,917 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] [2022-03-17 15:27:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-17 15:27:57,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-03-17 15:27:57,921 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) [2022-03-17 15:27:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 159 transitions. [2022-03-17 15:27:57,922 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 159 transitions. Word has length 85 [2022-03-17 15:27:57,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:27:57,923 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 159 transitions. [2022-03-17 15:27:57,923 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) [2022-03-17 15:27:57,923 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 159 transitions. [2022-03-17 15:27:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-17 15:27:57,924 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:27:57,924 INFO L500 BasicCegarLoop]: trace histogram [70, 66, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:27:57,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 15:27:58,141 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 [2022-03-17 15:27:58,142 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:27:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:27:58,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1228657455, now seen corresponding path program 6 times [2022-03-17 15:27:58,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:27:58,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159619593] [2022-03-17 15:27:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:27:58,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:27:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:59,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:27:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:27:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 469 proven. 4422 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 15:27:59,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:27:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159619593] [2022-03-17 15:27:59,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159619593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:27:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463172335] [2022-03-17 15:27:59,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 15:27:59,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:27:59,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:27:59,623 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) [2022-03-17 15:27:59,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 15:27:59,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-17 15:27:59,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:27:59,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 15:27:59,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:28:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 594 proven. 16 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-03-17 15:28:00,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:28:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 594 proven. 16 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-03-17 15:28:00,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463172335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:28:00,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:28:00,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 7, 7] total 80 [2022-03-17 15:28:00,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359825880] [2022-03-17 15:28:00,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:28:00,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-17 15:28:00,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:28:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-17 15:28:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-17 15:28:00,408 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) [2022-03-17 15:28:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:28:02,458 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2022-03-17 15:28:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-17 15:28:02,459 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 [2022-03-17 15:28:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:28:02,461 INFO L225 Difference]: With dead ends: 168 [2022-03-17 15:28:02,462 INFO L226 Difference]: Without dead ends: 168 [2022-03-17 15:28:02,466 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2998 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-03-17 15:28:02,466 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 [2022-03-17 15:28:02,467 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] [2022-03-17 15:28:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-17 15:28:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-03-17 15:28:02,471 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) [2022-03-17 15:28:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 179 transitions. [2022-03-17 15:28:02,473 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 179 transitions. Word has length 153 [2022-03-17 15:28:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:28:02,474 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 179 transitions. [2022-03-17 15:28:02,474 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) [2022-03-17 15:28:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 179 transitions. [2022-03-17 15:28:02,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-17 15:28:02,475 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:28:02,475 INFO L500 BasicCegarLoop]: trace histogram [77, 67, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:28:02,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 15:28:02,682 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 [2022-03-17 15:28:02,682 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:28:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:28:02,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1970638163, now seen corresponding path program 7 times [2022-03-17 15:28:02,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:28:02,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774454142] [2022-03-17 15:28:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:28:02,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:28:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:28:04,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:28:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:28:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5930 backedges. 1292 proven. 4556 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-17 15:28:04,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:28:04,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774454142] [2022-03-17 15:28:04,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774454142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:28:04,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669596483] [2022-03-17 15:28:04,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 15:28:04,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:28:04,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:28:04,038 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) [2022-03-17 15:28:04,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 15:28:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:28:04,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-17 15:28:04,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:28:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5930 backedges. 1292 proven. 4556 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-17 15:28:04,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:28:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5930 backedges. 1292 proven. 4556 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-17 15:28:08,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669596483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:28:08,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:28:08,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-17 15:28:08,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955656737] [2022-03-17 15:28:08,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:28:08,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-17 15:28:08,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:28:08,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-17 15:28:08,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-17 15:28:08,197 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) [2022-03-17 15:28:14,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:28:14,099 INFO L93 Difference]: Finished difference Result 306 states and 317 transitions. [2022-03-17 15:28:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-17 15:28:14,099 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 [2022-03-17 15:28:14,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:28:14,100 INFO L225 Difference]: With dead ends: 306 [2022-03-17 15:28:14,100 INFO L226 Difference]: Without dead ends: 306 [2022-03-17 15:28:14,106 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-17 15:28:14,106 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-17 15:28:14,107 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] [2022-03-17 15:28:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-03-17 15:28:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-03-17 15:28:14,122 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) [2022-03-17 15:28:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 317 transitions. [2022-03-17 15:28:14,123 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 317 transitions. Word has length 167 [2022-03-17 15:28:14,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:28:14,123 INFO L478 AbstractCegarLoop]: Abstraction has 306 states and 317 transitions. [2022-03-17 15:28:14,124 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) [2022-03-17 15:28:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 317 transitions. [2022-03-17 15:28:14,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-03-17 15:28:14,126 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:28:14,126 INFO L500 BasicCegarLoop]: trace histogram [146, 136, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:28:14,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 15:28:14,327 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 [2022-03-17 15:28:14,327 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:28:14,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:28:14,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1436809081, now seen corresponding path program 8 times [2022-03-17 15:28:14,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:28:14,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330229728] [2022-03-17 15:28:14,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:28:14,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:28:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:28:18,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:28:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:28:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 21317 backedges. 2603 proven. 18632 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-17 15:28:18,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:28:18,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330229728] [2022-03-17 15:28:18,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330229728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:28:18,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675443312] [2022-03-17 15:28:18,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 15:28:18,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:28:18,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:28:18,706 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) [2022-03-17 15:28:18,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 15:28:18,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 15:28:18,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:28:18,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-17 15:28:18,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:28:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21317 backedges. 2603 proven. 18632 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-17 15:28:19,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:28:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 21317 backedges. 2603 proven. 18632 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-17 15:28:30,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675443312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:28:30,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:28:30,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-17 15:28:30,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159294889] [2022-03-17 15:28:30,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:28:30,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-17 15:28:30,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:28:30,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-17 15:28:30,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-17 15:28:30,023 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) [2022-03-17 15:28:46,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:28:46,581 INFO L93 Difference]: Finished difference Result 582 states and 593 transitions. [2022-03-17 15:28:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-17 15:28:46,582 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 [2022-03-17 15:28:46,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:28:46,583 INFO L225 Difference]: With dead ends: 582 [2022-03-17 15:28:46,584 INFO L226 Difference]: Without dead ends: 582 [2022-03-17 15:28:46,599 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-17 15:28:46,599 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 284 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-03-17 15:28:46,600 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] [2022-03-17 15:28:46,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-03-17 15:28:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2022-03-17 15:28:46,609 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) [2022-03-17 15:28:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 593 transitions. [2022-03-17 15:28:46,614 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 593 transitions. Word has length 305 [2022-03-17 15:28:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:28:46,615 INFO L478 AbstractCegarLoop]: Abstraction has 582 states and 593 transitions. [2022-03-17 15:28:46,615 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) [2022-03-17 15:28:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 593 transitions. [2022-03-17 15:28:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2022-03-17 15:28:46,623 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:28:46,623 INFO L500 BasicCegarLoop]: trace histogram [284, 274, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:28:46,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 15:28:46,841 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 [2022-03-17 15:28:46,841 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:28:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:28:46,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1080022033, now seen corresponding path program 9 times [2022-03-17 15:28:46,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:28:46,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386919535] [2022-03-17 15:28:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:28:46,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:28:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:29:00,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:29:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:29:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 80657 backedges. 5225 proven. 75350 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-17 15:29:00,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:29:00,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386919535] [2022-03-17 15:29:00,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386919535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:29:00,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881574303] [2022-03-17 15:29:00,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 15:29:00,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:29:00,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:29:00,692 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) [2022-03-17 15:29:00,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 15:29:00,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-17 15:29:00,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:29:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 15:29:00,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:29:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 80657 backedges. 5754 proven. 100 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-03-17 15:29:03,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:29:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 80657 backedges. 5754 proven. 100 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-03-17 15:29:04,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881574303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:29:04,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:29:04,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 13, 13] total 300 [2022-03-17 15:29:04,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200372050] [2022-03-17 15:29:04,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:29:04,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 300 states [2022-03-17 15:29:04,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:29:04,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 300 interpolants. [2022-03-17 15:29:04,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44553, Invalid=45147, Unknown=0, NotChecked=0, Total=89700 [2022-03-17 15:29:04,806 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) [2022-03-17 15:29:28,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:29:28,871 INFO L93 Difference]: Finished difference Result 608 states and 631 transitions. [2022-03-17 15:29:28,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2022-03-17 15:29:28,873 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 [2022-03-17 15:29:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:29:28,875 INFO L225 Difference]: With dead ends: 608 [2022-03-17 15:29:28,875 INFO L226 Difference]: Without dead ends: 608 [2022-03-17 15:29:28,891 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1758 GetRequests, 1163 SyntacticMatches, 0 SemanticMatches, 595 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44275 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=133653, Invalid=222159, Unknown=0, NotChecked=0, Total=355812 [2022-03-17 15:29:28,892 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 888 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 1528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 15:29:28,892 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 30 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1528 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 15:29:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-03-17 15:29:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2022-03-17 15:29:28,898 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) [2022-03-17 15:29:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 631 transitions. [2022-03-17 15:29:28,900 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 631 transitions. Word has length 581 [2022-03-17 15:29:28,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:29:28,900 INFO L478 AbstractCegarLoop]: Abstraction has 608 states and 631 transitions. [2022-03-17 15:29:28,901 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) [2022-03-17 15:29:28,901 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 631 transitions. [2022-03-17 15:29:28,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2022-03-17 15:29:28,907 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:29:28,907 INFO L500 BasicCegarLoop]: trace histogram [297, 275, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:29:28,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-17 15:29:29,121 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 [2022-03-17 15:29:29,121 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:29:29,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:29:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash -929114959, now seen corresponding path program 10 times [2022-03-17 15:29:29,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:29:29,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629199447] [2022-03-17 15:29:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:29:29,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:29:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:29:43,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:29:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:29:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 88210 backedges. 11868 proven. 75900 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-17 15:29:43,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:29:43,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629199447] [2022-03-17 15:29:43,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629199447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:29:43,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112486496] [2022-03-17 15:29:43,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 15:29:43,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:29:43,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:29:43,403 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) [2022-03-17 15:29:43,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 15:29:43,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 15:29:43,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:29:43,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-17 15:29:43,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:29:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 88210 backedges. 11868 proven. 75900 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-17 15:29:44,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:30:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 88210 backedges. 11868 proven. 75900 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-17 15:30:31,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112486496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:30:31,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:30:31,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-17 15:30:31,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486435658] [2022-03-17 15:30:31,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:30:31,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-17 15:30:31,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:30:31,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-17 15:30:31,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-17 15:30:31,485 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) [2022-03-17 15:31:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:31:40,609 INFO L93 Difference]: Finished difference Result 1162 states and 1185 transitions. [2022-03-17 15:31:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-17 15:31:40,610 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 [2022-03-17 15:31:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:31:40,622 INFO L225 Difference]: With dead ends: 1162 [2022-03-17 15:31:40,622 INFO L226 Difference]: Without dead ends: 1162 [2022-03-17 15:31:40,697 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2045 GetRequests, 939 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 121.9s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-17 15:31:40,698 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 562 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-17 15:31:40,698 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 51 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-17 15:31:40,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-03-17 15:31:40,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1162. [2022-03-17 15:31:40,707 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) [2022-03-17 15:31:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1185 transitions. [2022-03-17 15:31:40,709 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1185 transitions. Word has length 607 [2022-03-17 15:31:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:31:40,710 INFO L478 AbstractCegarLoop]: Abstraction has 1162 states and 1185 transitions. [2022-03-17 15:31:40,711 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) [2022-03-17 15:31:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1185 transitions. [2022-03-17 15:31:40,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1162 [2022-03-17 15:31:40,720 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:31:40,720 INFO L500 BasicCegarLoop]: trace histogram [574, 552, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:31:40,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-17 15:31:40,923 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 [2022-03-17 15:31:40,924 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:31:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:31:40,924 INFO L85 PathProgramCache]: Analyzing trace with hash 683431997, now seen corresponding path program 11 times [2022-03-17 15:31:40,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:31:40,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773264721] [2022-03-17 15:31:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:31:40,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:31:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:32:40,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:32:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:32:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 329477 backedges. 23779 proven. 305256 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-17 15:32:40,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:32:40,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773264721] [2022-03-17 15:32:40,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773264721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:32:40,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795973308] [2022-03-17 15:32:40,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 15:32:40,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:32:40,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:32:40,089 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) [2022-03-17 15:32:40,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 15:32:42,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 575 check-sat command(s) [2022-03-17 15:32:42,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:32:42,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 2397 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-17 15:32:42,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:32:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 329477 backedges. 23779 proven. 305256 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-17 15:32:44,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:35:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 329477 backedges. 23779 proven. 305256 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-17 15:35:43,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795973308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:35:43,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:35:43,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [556, 555, 555] total 1110 [2022-03-17 15:35:43,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509120389] [2022-03-17 15:35:43,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:35:43,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 1110 states [2022-03-17 15:35:43,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:35:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1110 interpolants. [2022-03-17 15:35:43,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614388, Invalid=616602, Unknown=0, NotChecked=0, Total=1230990 [2022-03-17 15:35:43,537 INFO L87 Difference]: Start difference. First operand 1162 states and 1185 transitions. Second operand has 1110 states, 1110 states have (on average 2.007207207207207) internal successors, (2228), 1109 states have internal predecessors, (2228), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)