/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_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 16:37:28,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 16:37:28,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 16:37:28,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 16:37:28,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 16:37:28,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 16:37:28,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 16:37:28,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 16:37:28,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 16:37:28,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 16:37:28,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 16:37:28,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 16:37:28,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 16:37:28,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 16:37:28,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 16:37:28,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 16:37:28,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 16:37:28,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 16:37:28,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 16:37:28,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 16:37:28,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 16:37:28,359 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 16:37:28,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 16:37:28,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 16:37:28,361 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 16:37:28,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 16:37:28,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 16:37:28,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 16:37:28,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 16:37:28,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 16:37:28,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 16:37:28,362 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 16:37:28,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 16:37:28,363 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 16:37:28,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 16:37:28,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 16:37:28,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 16:37:28,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 16:37:28,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 16:37:28,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:37:28,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 16:37:28,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 16:37:28,364 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 16:37:28,365 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 16:37:28,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 16:37:28,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 16:37:28,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 16:37:28,577 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 16:37:28,578 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 16:37:28,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2022-02-23 16:37:28,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8fe5d3d2/02d700c5328f40179997765869d5118c/FLAGf172c3e21 [2022-02-23 16:37:28,941 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 16:37:28,941 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2022-02-23 16:37:28,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8fe5d3d2/02d700c5328f40179997765869d5118c/FLAGf172c3e21 [2022-02-23 16:37:29,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8fe5d3d2/02d700c5328f40179997765869d5118c [2022-02-23 16:37:29,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 16:37:29,366 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 16:37:29,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 16:37:29,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 16:37:29,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 16:37:29,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:37:29" (1/1) ... [2022-02-23 16:37:29,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2233ec56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:37:29, skipping insertion in model container [2022-02-23 16:37:29,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:37:29" (1/1) ... [2022-02-23 16:37:29,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 16:37:29,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 16:37:29,511 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_3.c[318,331] [2022-02-23 16:37:29,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:37:29,537 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 16:37:29,546 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_3.c[318,331] [2022-02-23 16:37:29,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:37:29,559 INFO L208 MainTranslator]: Completed translation [2022-02-23 16:37:29,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:37:29 WrapperNode [2022-02-23 16:37:29,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 16:37:29,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 16:37:29,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 16:37:29,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 16:37:29,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:37:29" (1/1) ... [2022-02-23 16:37:29,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:37:29" (1/1) ... [2022-02-23 16:37:29,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:37:29" (1/1) ... [2022-02-23 16:37:29,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:37:29" (1/1) ... [2022-02-23 16:37:29,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:37:29" (1/1) ... [2022-02-23 16:37:29,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:37:29" (1/1) ... [2022-02-23 16:37:29,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:37:29" (1/1) ... [2022-02-23 16:37:29,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 16:37:29,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 16:37:29,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 16:37:29,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 16:37:29,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:37:29" (1/1) ... [2022-02-23 16:37:29,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:37:29,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:37:29,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 16:37:29,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 16:37:29,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 16:37:29,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 16:37:29,651 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 16:37:29,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 16:37:29,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 16:37:29,651 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 16:37:29,652 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 16:37:29,652 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 16:37:29,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 16:37:29,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 16:37:29,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 16:37:29,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 16:37:29,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 16:37:29,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 16:37:29,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 16:37:29,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 16:37:29,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 16:37:29,710 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 16:37:29,712 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 16:37:29,832 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 16:37:29,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 16:37:29,843 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 16:37:29,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:37:29 BoogieIcfgContainer [2022-02-23 16:37:29,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 16:37:29,846 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 16:37:29,846 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 16:37:29,847 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 16:37:29,849 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:37:29" (1/1) ... [2022-02-23 16:37:30,052 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-23 16:37:30,053 INFO L91 elerationTransformer]: Accelerated Formula: (and (= v_main_~z~0_1 (+ v_main_~z~0_2 1)) (= v_main_~x~0_3 (+ v_main_~x~0_2 1)) (< 0 v_main_~y~0_2) (= (+ (- 2) v_main_~y~0_2) v_main_~y~0_1)) InVars {main_~x~0=v_main_~x~0_3, main_~z~0=v_main_~z~0_2, main_~y~0=v_main_~y~0_2} OutVars{main_~x~0=v_main_~x~0_2, main_~z~0=v_main_~z~0_1, main_~y~0=v_main_~y~0_1, main_#t~post8=|v_main_#t~post8_1|, main_#t~post7=|v_main_#t~post7_1|} AuxVars[] AssignedVars[main_~x~0, main_~z~0, main_~y~0, main_#t~post8, main_#t~post7] to Formula: (or (and (= (+ v_main_~y~0_1 (* v_main_~x~0_3 2)) (+ v_main_~y~0_2 (* v_main_~x~0_2 2))) (< v_main_~x~0_3 (+ (div (+ (- 1) v_main_~y~0_2) 2) v_main_~x~0_2 2)) (= (+ v_main_~x~0_2 v_main_~z~0_1) (+ v_main_~x~0_3 v_main_~z~0_2)) (< v_main_~x~0_2 v_main_~x~0_3)) (and (= v_main_~z~0_2 v_main_~z~0_1) (= v_main_~y~0_2 v_main_~y~0_1) (not (< 0 v_main_~y~0_2)) (= v_main_~x~0_3 v_main_~x~0_2) (= |v_main_#t~post7_3| |v_main_#t~post7_1|) (= |v_main_#t~post8_3| |v_main_#t~post8_1|))) InVars {main_~y~0=v_main_~y~0_2, main_~x~0=v_main_~x~0_3, main_#t~post8=|v_main_#t~post8_3|, main_~z~0=v_main_~z~0_2, main_#t~post7=|v_main_#t~post7_3|} OutVars{main_~y~0=v_main_~y~0_1, main_~x~0=v_main_~x~0_2, main_#t~post8=|v_main_#t~post8_1|, main_~z~0=v_main_~z~0_1, main_#t~post7=|v_main_#t~post7_1|} AuxVars[] AssignedVars[main_~x~0, main_~z~0, main_~y~0, main_#t~post8, main_#t~post7] [2022-02-23 16:37:30,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:37:30 BasicIcfg [2022-02-23 16:37:30,058 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 16:37:30,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 16:37:30,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 16:37:30,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 16:37:30,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:37:29" (1/4) ... [2022-02-23 16:37:30,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6015798a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:37:30, skipping insertion in model container [2022-02-23 16:37:30,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:37:29" (2/4) ... [2022-02-23 16:37:30,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6015798a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:37:30, skipping insertion in model container [2022-02-23 16:37:30,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:37:29" (3/4) ... [2022-02-23 16:37:30,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6015798a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:37:30, skipping insertion in model container [2022-02-23 16:37:30,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:37:30" (4/4) ... [2022-02-23 16:37:30,068 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.cJordan [2022-02-23 16:37:30,072 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 16:37:30,072 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 16:37:30,115 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 16:37:30,121 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 16:37:30,121 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 16:37:30,131 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) [2022-02-23 16:37:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 16:37:30,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:37:30,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:37:30,138 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:37:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:37:30,142 INFO L85 PathProgramCache]: Analyzing trace with hash 164364990, now seen corresponding path program 1 times [2022-02-23 16:37:30,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:37:30,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367616736] [2022-02-23 16:37:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:30,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:37:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:30,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:37:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:37:30,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:37:30,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367616736] [2022-02-23 16:37:30,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367616736] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:37:30,249 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:37:30,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 16:37:30,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007999063] [2022-02-23 16:37:30,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:37:30,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 16:37:30,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:37:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 16:37:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 16:37:30,278 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) [2022-02-23 16:37:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:37:30,300 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-02-23 16:37:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 16:37:30,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-23 16:37:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:37:30,307 INFO L225 Difference]: With dead ends: 21 [2022-02-23 16:37:30,307 INFO L226 Difference]: Without dead ends: 14 [2022-02-23 16:37:30,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 16:37:30,311 INFO L933 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 [2022-02-23 16:37:30,312 INFO L934 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] [2022-02-23 16:37:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-23 16:37:30,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-23 16:37:30,335 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) [2022-02-23 16:37:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-02-23 16:37:30,337 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-02-23 16:37:30,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:37:30,337 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-02-23 16:37:30,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:30,337 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-02-23 16:37:30,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 16:37:30,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:37:30,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:37:30,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 16:37:30,338 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:37:30,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:37:30,339 INFO L85 PathProgramCache]: Analyzing trace with hash 165288511, now seen corresponding path program 1 times [2022-02-23 16:37:30,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:37:30,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235898199] [2022-02-23 16:37:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:30,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:37:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:30,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:37:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:37:30,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:37:30,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235898199] [2022-02-23 16:37:30,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235898199] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:37:30,421 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:37:30,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 16:37:30,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190229532] [2022-02-23 16:37:30,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:37:30,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 16:37:30,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:37:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 16:37:30,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 16:37:30,427 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) [2022-02-23 16:37:30,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:37:30,466 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-02-23 16:37:30,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 16:37:30,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-23 16:37:30,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:37:30,469 INFO L225 Difference]: With dead ends: 16 [2022-02-23 16:37:30,469 INFO L226 Difference]: Without dead ends: 16 [2022-02-23 16:37:30,471 INFO L932 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 [2022-02-23 16:37:30,474 INFO L933 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 [2022-02-23 16:37:30,474 INFO L934 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] [2022-02-23 16:37:30,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-23 16:37:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-23 16:37:30,477 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) [2022-02-23 16:37:30,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-02-23 16:37:30,478 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-02-23 16:37:30,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:37:30,478 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-02-23 16:37:30,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:30,478 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-02-23 16:37:30,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 16:37:30,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:37:30,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:37:30,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 16:37:30,479 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:37:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:37:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1054746269, now seen corresponding path program 1 times [2022-02-23 16:37:30,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:37:30,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824978077] [2022-02-23 16:37:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:30,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:37:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:30,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:37:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 16:37:30,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:37:30,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824978077] [2022-02-23 16:37:30,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824978077] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:37:30,523 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:37:30,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 16:37:30,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678392837] [2022-02-23 16:37:30,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:37:30,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 16:37:30,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:37:30,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 16:37:30,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 16:37:30,525 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) [2022-02-23 16:37:30,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:37:30,546 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-02-23 16:37:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 16:37:30,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-23 16:37:30,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:37:30,547 INFO L225 Difference]: With dead ends: 17 [2022-02-23 16:37:30,547 INFO L226 Difference]: Without dead ends: 17 [2022-02-23 16:37:30,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 16:37:30,549 INFO L933 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 [2022-02-23 16:37:30,549 INFO L934 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] [2022-02-23 16:37:30,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-23 16:37:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-23 16:37:30,552 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) [2022-02-23 16:37:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-02-23 16:37:30,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-02-23 16:37:30,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:37:30,566 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-02-23 16:37:30,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-02-23 16:37:30,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-23 16:37:30,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:37:30,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:37:30,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 16:37:30,568 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:37:30,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:37:30,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1687477607, now seen corresponding path program 1 times [2022-02-23 16:37:30,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:37:30,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580473341] [2022-02-23 16:37:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:30,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:37:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:30,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:37:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 16:37:30,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:37:30,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580473341] [2022-02-23 16:37:30,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580473341] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:37:30,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116360140] [2022-02-23 16:37:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:30,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:30,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:37:30,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:37:30,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 16:37:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:30,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 16:37:30,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:37:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 16:37:30,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:37:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 16:37:30,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116360140] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:37:30,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:37:30,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-23 16:37:30,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656356736] [2022-02-23 16:37:30,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:37:30,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 16:37:30,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:37:30,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 16:37:30,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-23 16:37:30,847 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) [2022-02-23 16:37:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:37:30,927 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-02-23 16:37:30,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 16:37:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-23 16:37:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:37:30,929 INFO L225 Difference]: With dead ends: 22 [2022-02-23 16:37:30,929 INFO L226 Difference]: Without dead ends: 22 [2022-02-23 16:37:30,933 INFO L932 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 [2022-02-23 16:37:30,936 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:37:30,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:37:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-23 16:37:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-02-23 16:37:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-02-23 16:37:30,946 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2022-02-23 16:37:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:37:30,947 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-02-23 16:37:30,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-02-23 16:37:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-23 16:37:30,949 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:37:30,950 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:37:30,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 16:37:31,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:31,164 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:37:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:37:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1507884679, now seen corresponding path program 1 times [2022-02-23 16:37:31,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:37:31,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44256165] [2022-02-23 16:37:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:31,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:37:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:31,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:37:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:37:31,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:37:31,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44256165] [2022-02-23 16:37:31,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44256165] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:37:31,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165328857] [2022-02-23 16:37:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:31,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:31,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:37:31,243 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:37:31,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 16:37:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:31,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 16:37:31,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:37:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:37:31,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:37:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:37:31,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165328857] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:37:31,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:37:31,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-23 16:37:31,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094592675] [2022-02-23 16:37:31,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:37:31,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 16:37:31,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:37:31,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 16:37:31,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-02-23 16:37:31,414 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:37:31,511 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-02-23 16:37:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 16:37:31,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-23 16:37:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:37:31,513 INFO L225 Difference]: With dead ends: 30 [2022-02-23 16:37:31,513 INFO L226 Difference]: Without dead ends: 30 [2022-02-23 16:37:31,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-02-23 16:37:31,514 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:37:31,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 31 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:37:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-23 16:37:31,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-23 16:37:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-02-23 16:37:31,521 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-02-23 16:37:31,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:37:31,521 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-02-23 16:37:31,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-02-23 16:37:31,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 16:37:31,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:37:31,524 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:37:31,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 16:37:31,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:31,742 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:37:31,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:37:31,742 INFO L85 PathProgramCache]: Analyzing trace with hash 163921129, now seen corresponding path program 2 times [2022-02-23 16:37:31,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:37:31,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000481933] [2022-02-23 16:37:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:31,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:37:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:31,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:37:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:37:31,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:37:31,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000481933] [2022-02-23 16:37:31,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000481933] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:37:31,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715720673] [2022-02-23 16:37:31,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:37:31,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:31,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:37:31,856 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:37:31,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 16:37:31,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:37:31,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:37:31,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-23 16:37:31,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:37:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:37:31,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:37:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:37:32,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715720673] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:37:32,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:37:32,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-23 16:37:32,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288527171] [2022-02-23 16:37:32,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:37:32,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 16:37:32,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:37:32,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 16:37:32,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-02-23 16:37:32,122 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:37:32,315 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-02-23 16:37:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 16:37:32,316 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-23 16:37:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:37:32,317 INFO L225 Difference]: With dead ends: 46 [2022-02-23 16:37:32,317 INFO L226 Difference]: Without dead ends: 46 [2022-02-23 16:37:32,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-02-23 16:37:32,318 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:37:32,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 31 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:37:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-23 16:37:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-02-23 16:37:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-02-23 16:37:32,322 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2022-02-23 16:37:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:37:32,323 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-02-23 16:37:32,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:32,323 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-02-23 16:37:32,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-23 16:37:32,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:37:32,324 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:37:32,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 16:37:32,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:32,528 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:37:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:37:32,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1399757879, now seen corresponding path program 3 times [2022-02-23 16:37:32,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:37:32,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952549727] [2022-02-23 16:37:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:32,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:37:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:32,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:37:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:37:32,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:37:32,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952549727] [2022-02-23 16:37:32,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952549727] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:37:32,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091148901] [2022-02-23 16:37:32,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:37:32,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:32,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:37:32,717 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:37:32,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 16:37:32,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-23 16:37:32,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:37:32,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 16:37:32,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:37:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-02-23 16:37:32,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:37:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-02-23 16:37:32,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091148901] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:37:32,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:37:32,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-02-23 16:37:32,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592996475] [2022-02-23 16:37:32,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:37:32,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 16:37:32,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:37:32,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 16:37:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-02-23 16:37:32,978 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:33,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:37:33,331 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-02-23 16:37:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-23 16:37:33,331 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-02-23 16:37:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:37:33,333 INFO L225 Difference]: With dead ends: 56 [2022-02-23 16:37:33,333 INFO L226 Difference]: Without dead ends: 56 [2022-02-23 16:37:33,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-02-23 16:37:33,334 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:37:33,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 35 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:37:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-23 16:37:33,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-23 16:37:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:33,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-02-23 16:37:33,339 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 45 [2022-02-23 16:37:33,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:37:33,340 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-02-23 16:37:33,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-02-23 16:37:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-23 16:37:33,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:37:33,341 INFO L514 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:37:33,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 16:37:33,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:33,547 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:37:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:37:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash -809396335, now seen corresponding path program 4 times [2022-02-23 16:37:33,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:37:33,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704802123] [2022-02-23 16:37:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:33,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:37:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:33,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:37:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:37:33,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:37:33,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704802123] [2022-02-23 16:37:33,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704802123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:37:33,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659042599] [2022-02-23 16:37:33,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 16:37:33,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:33,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:37:33,763 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:37:33,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 16:37:33,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 16:37:33,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:37:33,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 16:37:33,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:37:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:37:33,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:37:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:37:34,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659042599] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:37:34,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:37:34,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-02-23 16:37:34,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559101912] [2022-02-23 16:37:34,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:37:34,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-23 16:37:34,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:37:34,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-23 16:37:34,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-02-23 16:37:34,319 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:37:34,922 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-02-23 16:37:34,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-23 16:37:34,923 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-23 16:37:34,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:37:34,923 INFO L225 Difference]: With dead ends: 90 [2022-02-23 16:37:34,924 INFO L226 Difference]: Without dead ends: 90 [2022-02-23 16:37:34,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-02-23 16:37:34,926 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:37:34,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:37:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-23 16:37:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-02-23 16:37:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 85 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2022-02-23 16:37:34,932 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 55 [2022-02-23 16:37:34,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:37:34,933 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2022-02-23 16:37:34,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:34,933 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2022-02-23 16:37:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-23 16:37:34,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:37:34,934 INFO L514 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:37:34,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-23 16:37:35,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:35,148 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:37:35,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:37:35,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1122744237, now seen corresponding path program 5 times [2022-02-23 16:37:35,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:37:35,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557880170] [2022-02-23 16:37:35,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:35,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:37:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:35,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:37:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:37:35,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:37:35,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557880170] [2022-02-23 16:37:35,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557880170] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:37:35,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842641922] [2022-02-23 16:37:35,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 16:37:35,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:35,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:37:35,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:37:35,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 16:37:35,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-02-23 16:37:35,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:37:35,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-23 16:37:35,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:37:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:37:35,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:37:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:37:37,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842641922] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:37:37,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:37:37,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-02-23 16:37:37,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220960454] [2022-02-23 16:37:37,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:37:37,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-23 16:37:37,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:37:37,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-23 16:37:37,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-02-23 16:37:37,218 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:37:39,012 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2022-02-23 16:37:39,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-23 16:37:39,013 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-23 16:37:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:37:39,013 INFO L225 Difference]: With dead ends: 158 [2022-02-23 16:37:39,014 INFO L226 Difference]: Without dead ends: 158 [2022-02-23 16:37:39,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-02-23 16:37:39,018 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:37:39,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 41 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 16:37:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-23 16:37:39,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-02-23 16:37:39,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0522875816993464) internal successors, (161), 153 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2022-02-23 16:37:39,026 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 89 [2022-02-23 16:37:39,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:37:39,026 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2022-02-23 16:37:39,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:39,027 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2022-02-23 16:37:39,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-23 16:37:39,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:37:39,028 INFO L514 BasicCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:37:39,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 16:37:39,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:39,232 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:37:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:37:39,232 INFO L85 PathProgramCache]: Analyzing trace with hash -666328347, now seen corresponding path program 6 times [2022-02-23 16:37:39,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:37:39,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194792485] [2022-02-23 16:37:39,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:39,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:37:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:40,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:37:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:37:40,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:37:40,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194792485] [2022-02-23 16:37:40,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194792485] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:37:40,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070279285] [2022-02-23 16:37:40,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 16:37:40,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:40,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:37:40,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:37:40,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 16:37:40,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-02-23 16:37:40,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:37:40,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 16:37:40,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:37:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-02-23 16:37:41,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:37:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-02-23 16:37:41,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070279285] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:37:41,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:37:41,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 9, 9] total 84 [2022-02-23 16:37:41,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615830974] [2022-02-23 16:37:41,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:37:41,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-23 16:37:41,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:37:41,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-23 16:37:41,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-02-23 16:37:41,941 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:44,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:37:44,668 INFO L93 Difference]: Finished difference Result 176 states and 191 transitions. [2022-02-23 16:37:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-23 16:37:44,668 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-02-23 16:37:44,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:37:44,669 INFO L225 Difference]: With dead ends: 176 [2022-02-23 16:37:44,669 INFO L226 Difference]: Without dead ends: 176 [2022-02-23 16:37:44,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-02-23 16:37:44,675 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 170 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 16:37:44,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 55 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 16:37:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-23 16:37:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-02-23 16:37:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0935672514619883) internal successors, (187), 171 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 191 transitions. [2022-02-23 16:37:44,684 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 191 transitions. Word has length 157 [2022-02-23 16:37:44,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:37:44,684 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 191 transitions. [2022-02-23 16:37:44,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:44,685 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 191 transitions. [2022-02-23 16:37:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-02-23 16:37:44,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:37:44,687 INFO L514 BasicCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:37:44,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 16:37:44,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:44,892 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:37:44,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:37:44,892 INFO L85 PathProgramCache]: Analyzing trace with hash -28776167, now seen corresponding path program 7 times [2022-02-23 16:37:44,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:37:44,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002435564] [2022-02-23 16:37:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:44,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:37:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:46,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:37:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:37:46,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:37:46,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002435564] [2022-02-23 16:37:46,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002435564] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:37:46,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544372954] [2022-02-23 16:37:46,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 16:37:46,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:37:46,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:37:46,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:37:46,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 16:37:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:37:46,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 69 conjunts are in the unsatisfiable core [2022-02-23 16:37:46,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:37:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:37:46,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:37:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:37:51,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544372954] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:37:51,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:37:51,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-02-23 16:37:51,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369560902] [2022-02-23 16:37:51,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:37:51,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-02-23 16:37:51,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:37:51,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-02-23 16:37:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-02-23 16:37:51,217 INFO L87 Difference]: Start difference. First operand 176 states and 191 transitions. Second operand has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:37:57,435 INFO L93 Difference]: Finished difference Result 314 states and 329 transitions. [2022-02-23 16:37:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-02-23 16:37:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-02-23 16:37:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:37:57,437 INFO L225 Difference]: With dead ends: 314 [2022-02-23 16:37:57,437 INFO L226 Difference]: Without dead ends: 314 [2022-02-23 16:37:57,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-02-23 16:37:57,443 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 16:37:57,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 36 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 16:37:57,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-23 16:37:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2022-02-23 16:37:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.051779935275081) internal successors, (325), 309 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 329 transitions. [2022-02-23 16:37:57,453 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 329 transitions. Word has length 175 [2022-02-23 16:37:57,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:37:57,454 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 329 transitions. [2022-02-23 16:37:57,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:37:57,454 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 329 transitions. [2022-02-23 16:37:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-02-23 16:37:57,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:37:57,478 INFO L514 BasicCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:37:57,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 16:37:57,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 16:37:57,696 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:37:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:37:57,696 INFO L85 PathProgramCache]: Analyzing trace with hash 270983653, now seen corresponding path program 8 times [2022-02-23 16:37:57,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:37:57,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588479792] [2022-02-23 16:37:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:37:57,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:37:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:03,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:38:03,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:03,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588479792] [2022-02-23 16:38:03,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588479792] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:38:03,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556863106] [2022-02-23 16:38:03,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:38:03,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:03,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:38:03,504 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:38:03,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 16:38:03,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:38:03,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:38:03,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 138 conjunts are in the unsatisfiable core [2022-02-23 16:38:03,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:38:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:38:04,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:38:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:38:20,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556863106] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:38:20,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:38:20,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-02-23 16:38:20,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894846364] [2022-02-23 16:38:20,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:38:20,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-02-23 16:38:20,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:20,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-02-23 16:38:20,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-02-23 16:38:20,885 INFO L87 Difference]: Start difference. First operand 314 states and 329 transitions. Second operand has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:38:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:38:44,760 INFO L93 Difference]: Finished difference Result 590 states and 605 transitions. [2022-02-23 16:38:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-02-23 16:38:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-02-23 16:38:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:38:44,764 INFO L225 Difference]: With dead ends: 590 [2022-02-23 16:38:44,764 INFO L226 Difference]: Without dead ends: 590 [2022-02-23 16:38:44,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-02-23 16:38:44,777 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 284 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 16:38:44,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 36 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 16:38:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-02-23 16:38:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2022-02-23 16:38:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 585 states have (on average 1.0273504273504273) internal successors, (601), 585 states have internal predecessors, (601), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:38:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 605 transitions. [2022-02-23 16:38:44,793 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 605 transitions. Word has length 313 [2022-02-23 16:38:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:38:44,793 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 605 transitions. [2022-02-23 16:38:44,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:38:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 605 transitions. [2022-02-23 16:38:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2022-02-23 16:38:44,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:44,804 INFO L514 BasicCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:44,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 16:38:45,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:45,019 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:45,020 INFO L85 PathProgramCache]: Analyzing trace with hash -404183427, now seen corresponding path program 9 times [2022-02-23 16:38:45,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:45,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629727116] [2022-02-23 16:38:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:45,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:39:07,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:39:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:39:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 16:39:07,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:39:07,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629727116] [2022-02-23 16:39:07,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629727116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:39:07,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326525246] [2022-02-23 16:39:07,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:39:07,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:39:07,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:39:07,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:39:07,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 16:39:07,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-02-23 16:39:07,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:39:07,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 16:39:07,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:39:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-02-23 16:39:10,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:39:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-02-23 16:39:14,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326525246] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:39:14,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:39:14,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 17, 17] total 308 [2022-02-23 16:39:14,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914493575] [2022-02-23 16:39:14,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:39:14,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 308 states [2022-02-23 16:39:14,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:39:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 308 interpolants. [2022-02-23 16:39:14,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46973, Invalid=47583, Unknown=0, NotChecked=0, Total=94556 [2022-02-23 16:39:14,010 INFO L87 Difference]: Start difference. First operand 590 states and 605 transitions. Second operand has 308 states, 308 states have (on average 2.029220779220779) internal successors, (625), 307 states have internal predecessors, (625), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:39:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:39:49,334 INFO L93 Difference]: Finished difference Result 624 states and 655 transitions. [2022-02-23 16:39:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-02-23 16:39:49,335 INFO L78 Accepts]: Start accepts. Automaton has has 308 states, 308 states have (on average 2.029220779220779) internal successors, (625), 307 states have internal predecessors, (625), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 589 [2022-02-23 16:39:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:39:49,337 INFO L225 Difference]: With dead ends: 624 [2022-02-23 16:39:49,337 INFO L226 Difference]: Without dead ends: 624 [2022-02-23 16:39:49,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1790 GetRequests, 1179 SyntacticMatches, 0 SemanticMatches, 611 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46725 ImplicationChecksByTransitivity, 57.8s TimeCoverageRelationStatistics Valid=140913, Invalid=234243, Unknown=0, NotChecked=0, Total=375156 [2022-02-23 16:39:49,351 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 908 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 1580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1580 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-23 16:39:49,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 40 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1580 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-23 16:39:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-02-23 16:39:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2022-02-23 16:39:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 619 states have (on average 1.0516962843295639) internal successors, (651), 619 states have internal predecessors, (651), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:39:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 655 transitions. [2022-02-23 16:39:49,361 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 655 transitions. Word has length 589 [2022-02-23 16:39:49,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:39:49,362 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 655 transitions. [2022-02-23 16:39:49,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 308 states, 308 states have (on average 2.029220779220779) internal successors, (625), 307 states have internal predecessors, (625), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:39:49,362 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 655 transitions. [2022-02-23 16:39:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2022-02-23 16:39:49,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:39:49,373 INFO L514 BasicCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:39:49,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-02-23 16:39:49,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 16:39:49,599 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:39:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:39:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash -876081783, now seen corresponding path program 10 times [2022-02-23 16:39:49,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:39:49,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024389764] [2022-02-23 16:39:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:39:49,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:39:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:12,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:40:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 16:40:12,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:40:12,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024389764] [2022-02-23 16:40:12,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024389764] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:40:12,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352234926] [2022-02-23 16:40:12,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 16:40:12,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:12,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:40:12,380 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:40:12,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 16:40:12,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 16:40:12,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:40:12,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 277 conjunts are in the unsatisfiable core [2022-02-23 16:40:12,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:40:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 16:40:13,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:41:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 16:41:21,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352234926] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:41:21,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:41:21,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-02-23 16:41:21,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644022250] [2022-02-23 16:41:21,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:41:21,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-02-23 16:41:21,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:41:21,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-02-23 16:41:21,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-02-23 16:41:21,987 INFO L87 Difference]: Start difference. First operand 624 states and 655 transitions. Second operand has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:43:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:43:00,758 INFO L93 Difference]: Finished difference Result 1178 states and 1209 transitions. [2022-02-23 16:43:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-02-23 16:43:00,759 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 623 [2022-02-23 16:43:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:43:00,763 INFO L225 Difference]: With dead ends: 1178 [2022-02-23 16:43:00,763 INFO L226 Difference]: Without dead ends: 1178 [2022-02-23 16:43:00,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2077 GetRequests, 971 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 179.7s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-02-23 16:43:00,833 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 562 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:43:00,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 61 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-23 16:43:00,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-02-23 16:43:00,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1178. [2022-02-23 16:43:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1173 states have (on average 1.0272804774083546) internal successors, (1205), 1173 states have internal predecessors, (1205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:43:00,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1209 transitions. [2022-02-23 16:43:00,849 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1209 transitions. Word has length 623 [2022-02-23 16:43:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:43:00,850 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 1209 transitions. [2022-02-23 16:43:00,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:43:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1209 transitions. [2022-02-23 16:43:00,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1178 [2022-02-23 16:43:00,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:43:00,862 INFO L514 BasicCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:43:00,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-23 16:43:01,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 16:43:01,075 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:43:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:43:01,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1533344021, now seen corresponding path program 11 times [2022-02-23 16:43:01,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:43:01,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308274947] [2022-02-23 16:43:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:43:01,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:43:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:44:33,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:44:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:44:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 16:44:33,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:44:33,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308274947] [2022-02-23 16:44:33,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308274947] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:44:33,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641664662] [2022-02-23 16:44:33,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 16:44:33,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:44:33,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:44:33,723 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:44:33,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 16:44:35,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-02-23 16:44:35,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:44:35,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 2445 conjuncts, 554 conjunts are in the unsatisfiable core [2022-02-23 16:44:35,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:44:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 16:44:38,252 INFO L328 TraceCheckSpWp]: Computing backward predicates...