/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/loop-invgen/seq-3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 16:06:37,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 16:06:37,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 16:06:37,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 16:06:37,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 16:06:37,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 16:06:37,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 16:06:37,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 16:06:37,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 16:06:37,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 16:06:37,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 16:06:37,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 16:06:37,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 16:06:37,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 16:06:37,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 16:06:37,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 16:06:37,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 16:06:37,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 16:06:37,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 16:06:37,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 16:06:37,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 16:06:37,596 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 16:06:37,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 16:06:37,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 16:06:37,597 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 16:06:37,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 16:06:37,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 16:06:37,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 16:06:37,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 16:06:37,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 16:06:37,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 16:06:37,598 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 16:06:37,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 16:06:37,598 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 16:06:37,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 16:06:37,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 16:06:37,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 16:06:37,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 16:06:37,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 16:06:37,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:06:37,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 16:06:37,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 16:06:37,600 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 16:06:37,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 16:06:37,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 16:06:37,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 16:06:37,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 16:06:37,814 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 16:06:37,815 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 16:06:37,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/seq-3.i [2022-02-23 16:06:37,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/836591dd2/02be6a30468941db8b9e51a180728eb7/FLAGa7424f978 [2022-02-23 16:06:38,229 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 16:06:38,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i [2022-02-23 16:06:38,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/836591dd2/02be6a30468941db8b9e51a180728eb7/FLAGa7424f978 [2022-02-23 16:06:38,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/836591dd2/02be6a30468941db8b9e51a180728eb7 [2022-02-23 16:06:38,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 16:06:38,250 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 16:06:38,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 16:06:38,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 16:06:38,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 16:06:38,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:06:38" (1/1) ... [2022-02-23 16:06:38,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2f073c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:38, skipping insertion in model container [2022-02-23 16:06:38,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:06:38" (1/1) ... [2022-02-23 16:06:38,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 16:06:38,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 16:06:38,437 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i[893,906] [2022-02-23 16:06:38,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:06:38,474 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 16:06:38,486 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i[893,906] [2022-02-23 16:06:38,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:06:38,513 INFO L208 MainTranslator]: Completed translation [2022-02-23 16:06:38,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:38 WrapperNode [2022-02-23 16:06:38,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 16:06:38,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 16:06:38,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 16:06:38,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 16:06:38,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:38" (1/1) ... [2022-02-23 16:06:38,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:38" (1/1) ... [2022-02-23 16:06:38,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:38" (1/1) ... [2022-02-23 16:06:38,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:38" (1/1) ... [2022-02-23 16:06:38,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:38" (1/1) ... [2022-02-23 16:06:38,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:38" (1/1) ... [2022-02-23 16:06:38,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:38" (1/1) ... [2022-02-23 16:06:38,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 16:06:38,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 16:06:38,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 16:06:38,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 16:06:38,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:38" (1/1) ... [2022-02-23 16:06:38,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:06:38,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:38,597 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 16:06:38,606 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 16:06:38,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 16:06:38,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 16:06:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 16:06:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 16:06:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 16:06:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 16:06:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 16:06:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 16:06:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 16:06:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 16:06:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 16:06:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 16:06:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 16:06:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 16:06:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 16:06:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 16:06:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 16:06:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 16:06:38,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 16:06:38,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 16:06:38,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 16:06:38,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 16:06:38,688 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 16:06:38,689 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 16:06:38,817 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 16:06:38,830 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 16:06:38,830 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-23 16:06:38,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:06:38 BoogieIcfgContainer [2022-02-23 16:06:38,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 16:06:38,832 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 16:06:38,832 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 16:06:38,833 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 16:06:38,836 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:06:38" (1/1) ... [2022-02-23 16:06:39,010 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-23 16:06:39,010 INFO L91 elerationTransformer]: Accelerated Formula: (and (= v_main_~k~0_1 (+ v_main_~k~0_2 1)) (< v_main_~i0~0_2 v_main_~n0~0_1) (= v_main_~i0~0_1 (+ v_main_~i0~0_2 1))) InVars {main_~k~0=v_main_~k~0_2, main_~i0~0=v_main_~i0~0_2, main_~n0~0=v_main_~n0~0_1} OutVars{main_~k~0=v_main_~k~0_1, main_#t~post4=|v_main_#t~post4_1|, main_~i0~0=v_main_~i0~0_1, main_#t~post3=|v_main_#t~post3_1|, main_~n0~0=v_main_~n0~0_1} AuxVars[] AssignedVars[main_~k~0, main_#t~post4, main_~i0~0, main_#t~post3] to Formula: (or (and (< v_main_~i0~0_1 (+ v_main_~n0~0_1 1)) (< v_main_~i0~0_2 v_main_~i0~0_1) (= (+ v_main_~i0~0_2 v_main_~k~0_1) (+ v_main_~i0~0_1 v_main_~k~0_2))) (and (= v_main_~k~0_2 v_main_~k~0_1) (= |v_main_#t~post3_3| |v_main_#t~post3_1|) (<= v_main_~n0~0_1 v_main_~i0~0_2) (= v_main_~i0~0_2 v_main_~i0~0_1) (= |v_main_#t~post4_3| |v_main_#t~post4_1|))) InVars {main_#t~post4=|v_main_#t~post4_3|, main_~i0~0=v_main_~i0~0_2, main_#t~post3=|v_main_#t~post3_3|, main_~n0~0=v_main_~n0~0_1, main_~k~0=v_main_~k~0_2} OutVars{main_#t~post4=|v_main_#t~post4_1|, main_~i0~0=v_main_~i0~0_1, main_#t~post3=|v_main_#t~post3_1|, main_~n0~0=v_main_~n0~0_1, main_~k~0=v_main_~k~0_1} AuxVars[] AssignedVars[main_~k~0, main_#t~post4, main_~i0~0, main_#t~post3] [2022-02-23 16:06:39,113 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-23 16:06:39,113 INFO L91 elerationTransformer]: Accelerated Formula: (and (= v_main_~i1~0_3 (+ v_main_~i1~0_4 1)) (< v_main_~i1~0_4 v_main_~n1~0_2) (= v_main_~k~0_3 (+ v_main_~k~0_4 1))) InVars {main_~n1~0=v_main_~n1~0_2, main_~i1~0=v_main_~i1~0_4, main_~k~0=v_main_~k~0_4} OutVars{main_~n1~0=v_main_~n1~0_2, main_~i1~0=v_main_~i1~0_3, main_~k~0=v_main_~k~0_3, main_#t~post5=|v_main_#t~post5_1|, main_#t~post6=|v_main_#t~post6_1|} AuxVars[] AssignedVars[main_~i1~0, main_~k~0, main_#t~post5, main_#t~post6] to Formula: (or (and (= v_main_~k~0_4 v_main_~k~0_3) (= |v_main_#t~post5_3| |v_main_#t~post5_1|) (= |v_main_#t~post6_3| |v_main_#t~post6_1|) (= v_main_~i1~0_3 v_main_~i1~0_4) (not (< v_main_~i1~0_4 v_main_~n1~0_2))) (and (< v_main_~i1~0_4 v_main_~i1~0_3) (= (+ v_main_~i1~0_4 v_main_~k~0_3) (+ v_main_~i1~0_3 v_main_~k~0_4)) (< v_main_~i1~0_3 (+ v_main_~n1~0_2 1)))) InVars {main_~n1~0=v_main_~n1~0_2, main_#t~post5=|v_main_#t~post5_3|, main_~i1~0=v_main_~i1~0_4, main_~k~0=v_main_~k~0_4, main_#t~post6=|v_main_#t~post6_3|} OutVars{main_~n1~0=v_main_~n1~0_2, main_#t~post5=|v_main_#t~post5_1|, main_~i1~0=v_main_~i1~0_3, main_~k~0=v_main_~k~0_3, main_#t~post6=|v_main_#t~post6_1|} AuxVars[] AssignedVars[main_~i1~0, main_~k~0, main_#t~post5, main_#t~post6] [2022-02-23 16:06:39,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:06:39 BasicIcfg [2022-02-23 16:06:39,122 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 16:06:39,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 16:06:39,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 16:06:39,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 16:06:39,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:06:38" (1/4) ... [2022-02-23 16:06:39,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363b7e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:06:39, skipping insertion in model container [2022-02-23 16:06:39,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:38" (2/4) ... [2022-02-23 16:06:39,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363b7e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:06:39, skipping insertion in model container [2022-02-23 16:06:39,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:06:38" (3/4) ... [2022-02-23 16:06:39,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363b7e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:06:39, skipping insertion in model container [2022-02-23 16:06:39,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:06:39" (4/4) ... [2022-02-23 16:06:39,129 INFO L111 eAbstractionObserver]: Analyzing ICFG seq-3.iJordan [2022-02-23 16:06:39,133 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 16:06:39,133 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 16:06:39,177 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 16:06:39,184 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 16:06:39,184 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 16:06:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 16:06:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 16:06:39,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:39,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:39,205 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:39,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:39,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1622270520, now seen corresponding path program 1 times [2022-02-23 16:06:39,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:39,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934164622] [2022-02-23 16:06:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:39,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:39,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:39,382 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 16:06:39,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:39,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934164622] [2022-02-23 16:06:39,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934164622] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:06:39,384 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:06:39,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 16:06:39,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739972008] [2022-02-23 16:06:39,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:06:39,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 16:06:39,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:39,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 16:06:39,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 16:06:39,420 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 16:06:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:39,449 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-02-23 16:06:39,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 16:06:39,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 17 [2022-02-23 16:06:39,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:39,459 INFO L225 Difference]: With dead ends: 25 [2022-02-23 16:06:39,460 INFO L226 Difference]: Without dead ends: 21 [2022-02-23 16:06:39,461 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 16:06:39,465 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 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 16:06:39,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:06:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-23 16:06:39,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-02-23 16:06:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 16:06:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-02-23 16:06:39,494 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-02-23 16:06:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:39,495 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-02-23 16:06:39,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 16:06:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-02-23 16:06:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 16:06:39,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:39,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:39,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 16:06:39,497 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:39,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:39,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1752745994, now seen corresponding path program 1 times [2022-02-23 16:06:39,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:39,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944730346] [2022-02-23 16:06:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:39,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:39,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:39,653 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 16:06:39,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:39,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944730346] [2022-02-23 16:06:39,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944730346] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:06:39,654 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:06:39,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-23 16:06:39,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516273356] [2022-02-23 16:06:39,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:06:39,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 16:06:39,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:39,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 16:06:39,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-02-23 16:06:39,657 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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 16:06:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:39,800 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-02-23 16:06:39,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 16:06:39,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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 17 [2022-02-23 16:06:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:39,803 INFO L225 Difference]: With dead ends: 31 [2022-02-23 16:06:39,803 INFO L226 Difference]: Without dead ends: 29 [2022-02-23 16:06:39,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-02-23 16:06:39,808 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:39,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:06:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-23 16:06:39,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-02-23 16:06:39,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 16:06:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-02-23 16:06:39,827 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-02-23 16:06:39,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:39,831 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-02-23 16:06:39,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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 16:06:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-02-23 16:06:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 16:06:39,832 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:39,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:39,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 16:06:39,833 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:39,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1618517526, now seen corresponding path program 1 times [2022-02-23 16:06:39,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:39,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126929815] [2022-02-23 16:06:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:39,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:40,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:40,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:40,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126929815] [2022-02-23 16:06:40,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126929815] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:06:40,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407593474] [2022-02-23 16:06:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:40,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:40,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:40,051 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 16:06:40,087 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 16:06:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 16:06:40,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:06:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:40,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:06:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:40,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407593474] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:06:40,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:06:40,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2022-02-23 16:06:40,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725691061] [2022-02-23 16:06:40,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:06:40,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 16:06:40,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:40,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 16:06:40,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-23 16:06:40,847 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:41,581 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-02-23 16:06:41,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-23 16:06:41,582 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.4) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-23 16:06:41,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:41,583 INFO L225 Difference]: With dead ends: 42 [2022-02-23 16:06:41,583 INFO L226 Difference]: Without dead ends: 42 [2022-02-23 16:06:41,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=332, Invalid=1560, Unknown=0, NotChecked=0, Total=1892 [2022-02-23 16:06:41,585 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:41,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 86 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 16:06:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-23 16:06:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-02-23 16:06:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 16:06:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-02-23 16:06:41,591 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 18 [2022-02-23 16:06:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:41,591 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-02-23 16:06:41,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.4) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-02-23 16:06:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-23 16:06:41,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:41,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:41,618 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 16:06:41,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:41,796 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:41,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:41,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1387858898, now seen corresponding path program 1 times [2022-02-23 16:06:41,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:41,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636532821] [2022-02-23 16:06:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:41,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:41,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:41,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-23 16:06:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:41,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:41,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636532821] [2022-02-23 16:06:41,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636532821] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:06:41,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121284771] [2022-02-23 16:06:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:41,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:41,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:41,984 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 16:06:41,986 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 16:06:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:42,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 16:06:42,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:06:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:42,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:06:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:42,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121284771] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:06:42,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:06:42,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-02-23 16:06:42,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519372531] [2022-02-23 16:06:42,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:06:42,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-23 16:06:42,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:42,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-23 16:06:42,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-02-23 16:06:42,746 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 29 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 26 states have internal predecessors, (44), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 16:06:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:44,008 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-02-23 16:06:44,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-23 16:06:44,009 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 26 states have internal predecessors, (44), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-02-23 16:06:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:44,010 INFO L225 Difference]: With dead ends: 75 [2022-02-23 16:06:44,010 INFO L226 Difference]: Without dead ends: 65 [2022-02-23 16:06:44,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=527, Invalid=2779, Unknown=0, NotChecked=0, Total=3306 [2022-02-23 16:06:44,034 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:44,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 87 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 16:06:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-23 16:06:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2022-02-23 16:06:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 16:06:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-02-23 16:06:44,044 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 25 [2022-02-23 16:06:44,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:44,044 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-02-23 16:06:44,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 26 states have internal predecessors, (44), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 16:06:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-02-23 16:06:44,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 16:06:44,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:44,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:44,070 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 16:06:44,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-23 16:06:44,246 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:44,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:44,246 INFO L85 PathProgramCache]: Analyzing trace with hash -390901714, now seen corresponding path program 1 times [2022-02-23 16:06:44,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:44,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691198020] [2022-02-23 16:06:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:44,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:44,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:44,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-23 16:06:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 16:06:44,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:44,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691198020] [2022-02-23 16:06:44,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691198020] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:06:44,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443310690] [2022-02-23 16:06:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:44,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:44,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:44,444 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 16:06:44,447 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 16:06:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:44,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 16:06:44,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:06:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:45,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:06:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:45,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443310690] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:06:45,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:06:45,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-23 16:06:45,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140227675] [2022-02-23 16:06:45,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:06:45,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-23 16:06:45,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-23 16:06:45,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2022-02-23 16:06:45,998 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 34 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 31 states have internal predecessors, (50), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 16:06:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:48,147 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2022-02-23 16:06:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-23 16:06:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 31 states have internal predecessors, (50), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2022-02-23 16:06:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:48,148 INFO L225 Difference]: With dead ends: 63 [2022-02-23 16:06:48,148 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 16:06:48,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=647, Invalid=3013, Unknown=0, NotChecked=0, Total=3660 [2022-02-23 16:06:48,149 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:48,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 90 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 16:06:48,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 16:06:48,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 16:06:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 16:06:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 16:06:48,150 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2022-02-23 16:06:48,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:48,150 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 16:06:48,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 31 states have internal predecessors, (50), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 16:06:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 16:06:48,151 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 16:06:48,152 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 16:06:48,170 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 16:06:48,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:48,355 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-02-23 16:06:48,356 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 16:06:48,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:06:48 BasicIcfg [2022-02-23 16:06:48,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 16:06:48,359 INFO L158 Benchmark]: Toolchain (without parser) took 10108.65ms. Allocated memory was 189.8MB in the beginning and 311.4MB in the end (delta: 121.6MB). Free memory was 133.0MB in the beginning and 199.4MB in the end (delta: -66.4MB). Peak memory consumption was 56.2MB. Max. memory is 8.0GB. [2022-02-23 16:06:48,359 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 189.8MB. Free memory is still 149.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 16:06:48,359 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.98ms. Allocated memory was 189.8MB in the beginning and 259.0MB in the end (delta: 69.2MB). Free memory was 132.8MB in the beginning and 229.9MB in the end (delta: -97.1MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. [2022-02-23 16:06:48,360 INFO L158 Benchmark]: Boogie Preprocessor took 43.84ms. Allocated memory is still 259.0MB. Free memory was 229.9MB in the beginning and 228.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 16:06:48,360 INFO L158 Benchmark]: RCFGBuilder took 272.30ms. Allocated memory is still 259.0MB. Free memory was 228.9MB in the beginning and 216.8MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 16:06:48,360 INFO L158 Benchmark]: IcfgTransformer took 289.83ms. Allocated memory is still 259.0MB. Free memory was 216.8MB in the beginning and 204.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-23 16:06:48,360 INFO L158 Benchmark]: TraceAbstraction took 9235.18ms. Allocated memory was 259.0MB in the beginning and 311.4MB in the end (delta: 52.4MB). Free memory was 204.2MB in the beginning and 199.4MB in the end (delta: 4.8MB). Peak memory consumption was 58.3MB. Max. memory is 8.0GB. [2022-02-23 16:06:48,362 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult - StatisticsResult: Jordan loop acceleration statistics 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 189.8MB. Free memory is still 149.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 260.98ms. Allocated memory was 189.8MB in the beginning and 259.0MB in the end (delta: 69.2MB). Free memory was 132.8MB in the beginning and 229.9MB in the end (delta: -97.1MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.84ms. Allocated memory is still 259.0MB. Free memory was 229.9MB in the beginning and 228.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 272.30ms. Allocated memory is still 259.0MB. Free memory was 228.9MB in the beginning and 216.8MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 289.83ms. Allocated memory is still 259.0MB. Free memory was 216.8MB in the beginning and 204.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 9235.18ms. Allocated memory was 259.0MB in the beginning and 311.4MB in the end (delta: 52.4MB). Free memory was 204.2MB in the beginning and 199.4MB in the end (delta: 4.8MB). Peak memory consumption was 58.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.2s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 381 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 377 mSDsluCounter, 328 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 236 mSDsCounter, 289 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1319 IncrementalHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 289 mSolverCounterUnsat, 92 mSDtfsCounter, 1319 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 99 SyntacticMatches, 9 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2289 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=4, InterpolantAutomatonStates: 94, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 29 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 174 NumberOfCodeBlocks, 174 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 233 ConstructedInterpolants, 0 QuantifiedInterpolants, 1787 SizeOfPredicates, 40 NumberOfNonLiveVariables, 234 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 14/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-23 16:06:48,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...