/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-d966a43 [2022-01-31 12:30:25,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 12:30:25,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 12:30:25,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 12:30:25,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 12:30:25,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 12:30:25,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 12:30:25,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 12:30:25,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 12:30:25,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 12:30:25,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 12:30:25,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 12:30:25,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 12:30:25,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 12:30:25,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 12:30:25,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 12:30:25,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 12:30:25,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 12:30:25,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 12:30:25,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 12:30:25,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 12:30:25,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 12:30:25,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 12:30:25,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 12:30:25,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 12:30:25,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 12:30:25,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 12:30:25,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 12:30:25,310 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 12:30:25,316 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 12:30:25,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 12:30:25,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 12:30:25,317 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 12:30:25,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 12:30:25,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 12:30:25,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 12:30:25,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 12:30:25,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 12:30:25,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 12:30:25,318 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 12:30:25,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 12:30:25,318 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 12:30:25,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 12:30:25,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 12:30:25,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 12:30:25,319 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 12:30:25,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 12:30:25,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:30:25,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 12:30:25,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 12:30:25,320 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 12:30:25,320 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 12:30:25,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 12:30:25,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 12:30:25,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 12:30:25,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 12:30:25,476 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 12:30:25,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/seq-3.i [2022-01-31 12:30:25,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b4ec7cd0/8f5e68f4f116481c8db126ac22153de4/FLAGe99e286ef [2022-01-31 12:30:25,845 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 12:30:25,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i [2022-01-31 12:30:25,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b4ec7cd0/8f5e68f4f116481c8db126ac22153de4/FLAGe99e286ef [2022-01-31 12:30:26,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b4ec7cd0/8f5e68f4f116481c8db126ac22153de4 [2022-01-31 12:30:26,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 12:30:26,284 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 12:30:26,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 12:30:26,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 12:30:26,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 12:30:26,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:30:26" (1/1) ... [2022-01-31 12:30:26,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@330a2bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:30:26, skipping insertion in model container [2022-01-31 12:30:26,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:30:26" (1/1) ... [2022-01-31 12:30:26,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 12:30:26,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 12:30:26,420 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] [2022-01-31 12:30:26,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:30:26,437 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 12:30:26,446 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] [2022-01-31 12:30:26,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:30:26,468 INFO L208 MainTranslator]: Completed translation [2022-01-31 12:30:26,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:30:26 WrapperNode [2022-01-31 12:30:26,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 12:30:26,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 12:30:26,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 12:30:26,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 12:30:26,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:30:26" (1/1) ... [2022-01-31 12:30:26,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:30:26" (1/1) ... [2022-01-31 12:30:26,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:30:26" (1/1) ... [2022-01-31 12:30:26,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:30:26" (1/1) ... [2022-01-31 12:30:26,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:30:26" (1/1) ... [2022-01-31 12:30:26,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:30:26" (1/1) ... [2022-01-31 12:30:26,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:30:26" (1/1) ... [2022-01-31 12:30:26,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 12:30:26,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 12:30:26,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 12:30:26,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 12:30:26,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:30:26" (1/1) ... [2022-01-31 12:30:26,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:30:26,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:30:26,544 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) [2022-01-31 12:30:26,562 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 [2022-01-31 12:30:26,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 12:30:26,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 12:30:26,577 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 12:30:26,577 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 12:30:26,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 12:30:26,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 12:30:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 12:30:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 12:30:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 12:30:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 12:30:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 12:30:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 12:30:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 12:30:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 12:30:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 12:30:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 12:30:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 12:30:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 12:30:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 12:30:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 12:30:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 12:30:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 12:30:26,652 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 12:30:26,653 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 12:30:26,772 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 12:30:26,776 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 12:30:26,776 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 12:30:26,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:30:26 BoogieIcfgContainer [2022-01-31 12:30:26,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 12:30:26,778 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 12:30:26,778 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 12:30:26,779 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 12:30:26,780 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:30:26" (1/1) ... [2022-01-31 12:30:26,884 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 [2022-01-31 12:30:26,884 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] [2022-01-31 12:30:26,953 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 [2022-01-31 12:30:26,954 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] [2022-01-31 12:30:26,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:30:26 BasicIcfg [2022-01-31 12:30:26,958 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 12:30:26,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 12:30:26,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 12:30:26,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 12:30:26,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:30:26" (1/4) ... [2022-01-31 12:30:26,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2908c81e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:30:26, skipping insertion in model container [2022-01-31 12:30:26,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:30:26" (2/4) ... [2022-01-31 12:30:26,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2908c81e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:30:26, skipping insertion in model container [2022-01-31 12:30:26,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:30:26" (3/4) ... [2022-01-31 12:30:26,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2908c81e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:30:26, skipping insertion in model container [2022-01-31 12:30:26,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:30:26" (4/4) ... [2022-01-31 12:30:26,963 INFO L111 eAbstractionObserver]: Analyzing ICFG seq-3.iJordan [2022-01-31 12:30:26,967 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 12:30:26,967 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 12:30:26,992 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 12:30:26,997 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 [2022-01-31 12:30:26,997 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 12:30:27,005 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) [2022-01-31 12:30:27,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 12:30:27,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:30:27,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:30:27,010 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:30:27,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:30:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1622270520, now seen corresponding path program 1 times [2022-01-31 12:30:27,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:30:27,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410270575] [2022-01-31 12:30:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:30:27,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:30:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:27,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:30:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:30:27,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:30:27,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410270575] [2022-01-31 12:30:27,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410270575] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:30:27,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:30:27,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 12:30:27,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131236897] [2022-01-31 12:30:27,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:30:27,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 12:30:27,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:30:27,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 12:30:27,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 12:30:27,131 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) [2022-01-31 12:30:27,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:30:27,168 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-01-31 12:30:27,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 12:30:27,170 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 [2022-01-31 12:30:27,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:30:27,174 INFO L225 Difference]: With dead ends: 25 [2022-01-31 12:30:27,174 INFO L226 Difference]: Without dead ends: 21 [2022-01-31 12:30:27,175 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 [2022-01-31 12:30:27,178 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 [2022-01-31 12:30:27,178 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] [2022-01-31 12:30:27,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-31 12:30:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-31 12:30:27,203 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) [2022-01-31 12:30:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-31 12:30:27,205 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-01-31 12:30:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:30:27,205 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-31 12:30:27,206 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) [2022-01-31 12:30:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-31 12:30:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 12:30:27,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:30:27,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:30:27,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 12:30:27,208 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:30:27,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:30:27,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1752745994, now seen corresponding path program 1 times [2022-01-31 12:30:27,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:30:27,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032117583] [2022-01-31 12:30:27,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:30:27,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:30:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:27,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:30:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:30:27,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:30:27,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032117583] [2022-01-31 12:30:27,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032117583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:30:27,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:30:27,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 12:30:27,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853062895] [2022-01-31 12:30:27,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:30:27,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 12:30:27,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:30:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 12:30:27,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-31 12:30:27,371 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) [2022-01-31 12:30:27,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:30:27,511 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-01-31 12:30:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 12:30:27,511 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 [2022-01-31 12:30:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:30:27,513 INFO L225 Difference]: With dead ends: 31 [2022-01-31 12:30:27,514 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 12:30:27,517 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 [2022-01-31 12:30:27,518 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-01-31 12:30:27,519 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] [2022-01-31 12:30:27,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 12:30:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-01-31 12:30:27,531 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) [2022-01-31 12:30:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-31 12:30:27,534 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-01-31 12:30:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:30:27,534 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-31 12:30:27,535 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) [2022-01-31 12:30:27,535 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-31 12:30:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 12:30:27,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:30:27,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:30:27,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 12:30:27,537 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:30:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:30:27,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1618517526, now seen corresponding path program 1 times [2022-01-31 12:30:27,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:30:27,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836663151] [2022-01-31 12:30:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:30:27,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:30:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:27,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:30:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:30:27,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:30:27,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836663151] [2022-01-31 12:30:27,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836663151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:30:27,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188619425] [2022-01-31 12:30:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:30:27,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:30:27,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:30:27,733 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) [2022-01-31 12:30:27,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 12:30:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:27,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 12:30:27,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:30:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:30:28,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:30:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:30:28,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188619425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:30:28,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:30:28,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2022-01-31 12:30:28,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162447339] [2022-01-31 12:30:28,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:30:28,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 12:30:28,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:30:28,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 12:30:28,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-31 12:30:28,455 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) [2022-01-31 12:30:29,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:30:29,055 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-01-31 12:30:29,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 12:30:29,055 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 [2022-01-31 12:30:29,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:30:29,056 INFO L225 Difference]: With dead ends: 42 [2022-01-31 12:30:29,056 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 12:30:29,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=332, Invalid=1560, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 12:30:29,058 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-01-31 12:30:29,058 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] [2022-01-31 12:30:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 12:30:29,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-01-31 12:30:29,061 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) [2022-01-31 12:30:29,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-01-31 12:30:29,062 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 18 [2022-01-31 12:30:29,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:30:29,062 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-01-31 12:30:29,063 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) [2022-01-31 12:30:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-01-31 12:30:29,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 12:30:29,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:30:29,064 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] [2022-01-31 12:30:29,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 12:30:29,280 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 [2022-01-31 12:30:29,280 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:30:29,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:30:29,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1387858898, now seen corresponding path program 1 times [2022-01-31 12:30:29,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:30:29,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014005595] [2022-01-31 12:30:29,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:30:29,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:30:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:29,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:30:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:29,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 12:30:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:30:29,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:30:29,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014005595] [2022-01-31 12:30:29,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014005595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:30:29,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711534455] [2022-01-31 12:30:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:30:29,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:30:29,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:30:29,438 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) [2022-01-31 12:30:29,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 12:30:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:29,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 12:30:29,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:30:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:30:29,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:30:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:30:30,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711534455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:30:30,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:30:30,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-31 12:30:30,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025204980] [2022-01-31 12:30:30,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:30:30,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 12:30:30,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:30:30,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 12:30:30,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-01-31 12:30:30,066 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) [2022-01-31 12:30:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:30:31,132 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-01-31 12:30:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 12:30:31,133 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 [2022-01-31 12:30:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:30:31,134 INFO L225 Difference]: With dead ends: 75 [2022-01-31 12:30:31,135 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 12:30:31,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=527, Invalid=2779, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 12:30:31,136 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-01-31 12:30:31,137 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] [2022-01-31 12:30:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 12:30:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2022-01-31 12:30:31,141 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) [2022-01-31 12:30:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-01-31 12:30:31,142 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 25 [2022-01-31 12:30:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:30:31,142 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-01-31 12:30:31,142 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) [2022-01-31 12:30:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-01-31 12:30:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 12:30:31,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:30:31,143 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] [2022-01-31 12:30:31,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 12:30:31,356 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 [2022-01-31 12:30:31,357 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:30:31,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:30:31,357 INFO L85 PathProgramCache]: Analyzing trace with hash -390901714, now seen corresponding path program 1 times [2022-01-31 12:30:31,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:30:31,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188195523] [2022-01-31 12:30:31,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:30:31,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:30:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:31,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:30:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:31,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 12:30:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:30:31,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:30:31,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188195523] [2022-01-31 12:30:31,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188195523] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:30:31,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729718159] [2022-01-31 12:30:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:30:31,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:30:31,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:30:31,515 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) [2022-01-31 12:30:31,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 12:30:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:31,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 12:30:31,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:30:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:30:32,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:30:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:30:32,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729718159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:30:32,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:30:32,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 35 [2022-01-31 12:30:32,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843475868] [2022-01-31 12:30:32,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:30:32,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 12:30:32,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:30:32,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 12:30:32,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 12:30:32,796 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 35 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 32 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) [2022-01-31 12:30:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:30:34,902 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2022-01-31 12:30:34,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 12:30:34,902 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 32 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 [2022-01-31 12:30:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:30:34,904 INFO L225 Difference]: With dead ends: 81 [2022-01-31 12:30:34,904 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 12:30:34,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=764, Invalid=3792, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 12:30:34,906 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 12:30:34,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 92 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 12:30:34,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 12:30:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2022-01-31 12:30:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 12:30:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-01-31 12:30:34,912 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 27 [2022-01-31 12:30:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:30:34,912 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-01-31 12:30:34,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 32 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) [2022-01-31 12:30:34,913 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-01-31 12:30:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 12:30:34,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:30:34,914 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:30:34,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 12:30:35,143 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 [2022-01-31 12:30:35,144 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:30:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:30:35,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1726056214, now seen corresponding path program 1 times [2022-01-31 12:30:35,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:30:35,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932302910] [2022-01-31 12:30:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:30:35,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:30:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:35,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:30:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:35,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 12:30:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:35,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 12:30:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:35,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 12:30:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:35,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 12:30:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 12:30:35,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:30:35,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932302910] [2022-01-31 12:30:35,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932302910] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:30:35,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392031918] [2022-01-31 12:30:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:30:35,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:30:35,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:30:35,320 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) [2022-01-31 12:30:35,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 12:30:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:35,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 12:30:35,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:30:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 12:30:35,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:30:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 12:30:36,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392031918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:30:36,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:30:36,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 38 [2022-01-31 12:30:36,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849069893] [2022-01-31 12:30:36,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:30:36,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 12:30:36,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:30:36,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 12:30:36,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 12:30:36,292 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 35 states have internal predecessors, (62), 14 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 12:30:37,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:30:37,306 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2022-01-31 12:30:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 12:30:37,307 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 35 states have internal predecessors, (62), 14 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 46 [2022-01-31 12:30:37,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:30:37,307 INFO L225 Difference]: With dead ends: 102 [2022-01-31 12:30:37,307 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 12:30:37,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=681, Invalid=3875, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 12:30:37,310 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 103 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 12:30:37,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 115 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 12:30:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 12:30:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-01-31 12:30:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 12:30:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-01-31 12:30:37,318 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 46 [2022-01-31 12:30:37,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:30:37,319 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-01-31 12:30:37,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 35 states have internal predecessors, (62), 14 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 12:30:37,319 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-01-31 12:30:37,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 12:30:37,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:30:37,320 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:30:37,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 12:30:37,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:30:37,537 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:30:37,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:30:37,539 INFO L85 PathProgramCache]: Analyzing trace with hash -895217650, now seen corresponding path program 2 times [2022-01-31 12:30:37,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:30:37,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378572614] [2022-01-31 12:30:37,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:30:37,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:30:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:37,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:30:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:37,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 12:30:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:37,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 12:30:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:37,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 12:30:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:37,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 12:30:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:37,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 12:30:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:30:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 12:30:37,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:30:37,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378572614] [2022-01-31 12:30:37,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378572614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:30:37,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682414832] [2022-01-31 12:30:37,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:30:37,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:30:37,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:30:37,770 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) [2022-01-31 12:30:37,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 12:30:37,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:30:37,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:30:37,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 12:30:37,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:30:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 12:30:39,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:30:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 12:30:39,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682414832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:30:39,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:30:39,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2022-01-31 12:30:39,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512222085] [2022-01-31 12:30:39,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:30:39,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 12:30:39,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:30:39,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 12:30:39,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1626, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 12:30:39,608 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 44 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 41 states have internal predecessors, (71), 17 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 12:30:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:30:40,718 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-01-31 12:30:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 12:30:40,719 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 41 states have internal predecessors, (71), 17 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 54 [2022-01-31 12:30:40,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:30:40,719 INFO L225 Difference]: With dead ends: 62 [2022-01-31 12:30:40,719 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 12:30:40,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=624, Invalid=3666, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 12:30:40,721 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 12:30:40,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 124 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 12:30:40,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 12:30:40,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 12:30:40,722 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) [2022-01-31 12:30:40,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 12:30:40,722 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2022-01-31 12:30:40,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:30:40,722 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 12:30:40,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 41 states have internal predecessors, (71), 17 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 12:30:40,723 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 12:30:40,723 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 12:30:40,725 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 12:30:40,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 12:30:40,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:30:40,937 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2022-01-31 12:30:40,938 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 12:30:40,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:30:40 BasicIcfg [2022-01-31 12:30:40,940 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 12:30:40,940 INFO L158 Benchmark]: Toolchain (without parser) took 14656.12ms. Allocated memory was 211.8MB in the beginning and 330.3MB in the end (delta: 118.5MB). Free memory was 164.1MB in the beginning and 155.7MB in the end (delta: 8.4MB). Peak memory consumption was 128.2MB. Max. memory is 8.0GB. [2022-01-31 12:30:40,940 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 211.8MB. Free memory is still 180.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 12:30:40,941 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.57ms. Allocated memory is still 211.8MB. Free memory was 163.8MB in the beginning and 190.2MB in the end (delta: -26.4MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. [2022-01-31 12:30:40,941 INFO L158 Benchmark]: Boogie Preprocessor took 43.69ms. Allocated memory is still 211.8MB. Free memory was 190.2MB in the beginning and 188.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 12:30:40,941 INFO L158 Benchmark]: RCFGBuilder took 263.67ms. Allocated memory is still 211.8MB. Free memory was 188.7MB in the beginning and 177.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 12:30:40,941 INFO L158 Benchmark]: IcfgTransformer took 179.82ms. Allocated memory is still 211.8MB. Free memory was 177.2MB in the beginning and 165.1MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 12:30:40,941 INFO L158 Benchmark]: TraceAbstraction took 13981.33ms. Allocated memory was 211.8MB in the beginning and 330.3MB in the end (delta: 118.5MB). Free memory was 164.6MB in the beginning and 155.7MB in the end (delta: 8.9MB). Peak memory consumption was 129.0MB. Max. memory is 8.0GB. [2022-01-31 12:30:40,942 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 211.8MB. Free memory is still 180.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 182.57ms. Allocated memory is still 211.8MB. Free memory was 163.8MB in the beginning and 190.2MB in the end (delta: -26.4MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.69ms. Allocated memory is still 211.8MB. Free memory was 190.2MB in the beginning and 188.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 263.67ms. Allocated memory is still 211.8MB. Free memory was 188.7MB in the beginning and 177.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 179.82ms. Allocated memory is still 211.8MB. Free memory was 177.2MB in the beginning and 165.1MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 13981.33ms. Allocated memory was 211.8MB in the beginning and 330.3MB in the end (delta: 118.5MB). Free memory was 164.6MB in the beginning and 155.7MB in the end (delta: 8.9MB). Peak memory consumption was 129.0MB. 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: 13.9s, OverallIterations: 7, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 544 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 538 mSDsluCounter, 569 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 440 mSDsCounter, 501 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2902 IncrementalHoareTripleChecker+Invalid, 3403 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 501 mSolverCounterUnsat, 129 mSDtfsCounter, 2902 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 589 GetRequests, 268 SyntacticMatches, 15 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5144 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=5, InterpolantAutomatonStates: 158, 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, 7 MinimizatonAttempts, 48 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 374 NumberOfCodeBlocks, 374 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 527 ConstructedInterpolants, 0 QuantifiedInterpolants, 4708 SizeOfPredicates, 68 NumberOfNonLiveVariables, 497 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 293/495 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! [2022-01-31 12:30:40,989 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...