/usr/bin/java -ea -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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-fb4f59a-m [2022-04-28 01:21:25,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-28 01:21:25,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-28 01:21:25,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-28 01:21:25,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-28 01:21:25,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-28 01:21:25,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-28 01:21:25,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-28 01:21:25,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-28 01:21:25,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-28 01:21:25,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-28 01:21:25,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-28 01:21:25,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-28 01:21:25,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-28 01:21:25,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-28 01:21:25,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-28 01:21:25,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-28 01:21:25,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-28 01:21:25,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-28 01:21:25,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-28 01:21:25,962 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-28 01:21:25,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-28 01:21:25,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-28 01:21:25,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-28 01:21:25,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-28 01:21:25,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-28 01:21:25,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-28 01:21:25,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-28 01:21:25,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-28 01:21:25,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-28 01:21:25,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-28 01:21:25,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-28 01:21:25,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-28 01:21:25,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-28 01:21:25,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-28 01:21:25,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-28 01:21:25,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-28 01:21:25,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-28 01:21:25,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-28 01:21:25,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-28 01:21:25,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-28 01:21:25,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-28 01:21:25,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-28 01:21:26,012 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-28 01:21:26,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-28 01:21:26,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-28 01:21:26,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-28 01:21:26,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-28 01:21:26,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-28 01:21:26,014 INFO L138 SettingsManager]: * Use SBE=true [2022-04-28 01:21:26,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-28 01:21:26,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-28 01:21:26,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-28 01:21:26,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-28 01:21:26,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-28 01:21:26,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-28 01:21:26,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-28 01:21:26,016 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-28 01:21:26,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-28 01:21:26,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-28 01:21:26,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-28 01:21:26,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-28 01:21:26,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 01:21:26,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-28 01:21:26,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-28 01:21:26,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-28 01:21:26,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-28 01:21:26,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-28 01:21:26,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-28 01:21:26,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-28 01:21:26,018 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-28 01:21:26,019 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-28 01:21:26,019 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-28 01:21:26,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-28 01:21:26,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-28 01:21:26,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-28 01:21:26,261 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-28 01:21:26,263 INFO L275 PluginConnector]: CDTParser initialized [2022-04-28 01:21:26,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound20.c [2022-04-28 01:21:26,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87e1dadb5/b7a601b98e6c4d5591a044e26566a234/FLAG709cd1c3b [2022-04-28 01:21:26,608 INFO L306 CDTParser]: Found 1 translation units. [2022-04-28 01:21:26,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound20.c [2022-04-28 01:21:26,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87e1dadb5/b7a601b98e6c4d5591a044e26566a234/FLAG709cd1c3b [2022-04-28 01:21:27,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87e1dadb5/b7a601b98e6c4d5591a044e26566a234 [2022-04-28 01:21:27,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-28 01:21:27,040 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-28 01:21:27,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-28 01:21:27,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-28 01:21:27,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-28 01:21:27,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 01:21:27" (1/1) ... [2022-04-28 01:21:27,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c2b0039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:21:27, skipping insertion in model container [2022-04-28 01:21:27,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 01:21:27" (1/1) ... [2022-04-28 01:21:27,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-28 01:21:27,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-28 01:21:27,199 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound20.c[454,467] [2022-04-28 01:21:27,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 01:21:27,219 INFO L203 MainTranslator]: Completed pre-run [2022-04-28 01:21:27,228 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound20.c[454,467] [2022-04-28 01:21:27,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 01:21:27,244 INFO L208 MainTranslator]: Completed translation [2022-04-28 01:21:27,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:21:27 WrapperNode [2022-04-28 01:21:27,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-28 01:21:27,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-28 01:21:27,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-28 01:21:27,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-28 01:21:27,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:21:27" (1/1) ... [2022-04-28 01:21:27,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:21:27" (1/1) ... [2022-04-28 01:21:27,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:21:27" (1/1) ... [2022-04-28 01:21:27,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:21:27" (1/1) ... [2022-04-28 01:21:27,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:21:27" (1/1) ... [2022-04-28 01:21:27,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:21:27" (1/1) ... [2022-04-28 01:21:27,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:21:27" (1/1) ... [2022-04-28 01:21:27,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-28 01:21:27,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-28 01:21:27,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-28 01:21:27,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-28 01:21:27,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:21:27" (1/1) ... [2022-04-28 01:21:27,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 01:21:27,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 01:21:27,308 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) [2022-04-28 01:21:27,310 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 [2022-04-28 01:21:27,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-28 01:21:27,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-28 01:21:27,335 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-28 01:21:27,335 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-28 01:21:27,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-28 01:21:27,335 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-28 01:21:27,335 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-28 01:21:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-28 01:21:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-28 01:21:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-28 01:21:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-28 01:21:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-28 01:21:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-28 01:21:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-28 01:21:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-28 01:21:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-28 01:21:27,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-28 01:21:27,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-28 01:21:27,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-28 01:21:27,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-28 01:21:27,382 INFO L234 CfgBuilder]: Building ICFG [2022-04-28 01:21:27,383 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-28 01:21:27,491 INFO L275 CfgBuilder]: Performing block encoding [2022-04-28 01:21:27,497 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-28 01:21:27,497 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-28 01:21:27,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 01:21:27 BoogieIcfgContainer [2022-04-28 01:21:27,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-28 01:21:27,500 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-28 01:21:27,500 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-28 01:21:27,501 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-28 01:21:27,503 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 01:21:27" (1/1) ... [2022-04-28 01:21:27,505 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-28 01:21:27,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 28.04 01:21:27 BasicIcfg [2022-04-28 01:21:27,522 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-28 01:21:27,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-28 01:21:27,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-28 01:21:27,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-28 01:21:27,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.04 01:21:27" (1/4) ... [2022-04-28 01:21:27,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47647622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 01:21:27, skipping insertion in model container [2022-04-28 01:21:27,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:21:27" (2/4) ... [2022-04-28 01:21:27,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47647622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 01:21:27, skipping insertion in model container [2022-04-28 01:21:27,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 01:21:27" (3/4) ... [2022-04-28 01:21:27,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47647622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.04 01:21:27, skipping insertion in model container [2022-04-28 01:21:27,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 28.04 01:21:27" (4/4) ... [2022-04-28 01:21:27,528 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound20.cqvasr [2022-04-28 01:21:27,540 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-28 01:21:27,540 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-28 01:21:27,576 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-28 01:21:27,582 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@14eac8da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@70854c9b [2022-04-28 01:21:27,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-28 01:21:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 01:21:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-28 01:21:27,611 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 01:21:27,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 01:21:27,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 01:21:27,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 01:21:27,629 INFO L85 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2022-04-28 01:21:27,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 01:21:27,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993874514] [2022-04-28 01:21:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 01:21:27,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 01:21:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 01:21:27,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-28 01:21:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 01:21:27,869 INFO L290 TraceCheckUtils]: 0: Hoare triple {30#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} [59] ULTIMATE.initENTRY-->ULTIMATE.initFINAL: Formula: (let ((.cse0 (select |v_#memory_int_1| 1))) (and (= v_~counter~0_3 0) (= 48 (select .cse0 0)) (= (select |v_#valid_1| 2) 1) (= (select |v_#valid_1| 0) 0) (< 0 |v_#StackHeapBarrier_1|) (= |v_#NULL.base_1| 0) (= 1 (select |v_#valid_1| 3)) (= (select |v_#length_1| 2) 9) (= (select |v_#length_1| 3) 12) (= (select |v_#valid_1| 1) 1) (= 2 (select |v_#length_1| 1)) (= (select .cse0 1) 0) (= |v_#NULL.offset_1| 0))) InVars {#memory_int=|v_#memory_int_1|, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #length=|v_#length_1|, #valid=|v_#valid_1|} OutVars{~counter~0=v_~counter~0_3, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #valid=|v_#valid_1|, #memory_int=|v_#memory_int_1|, #NULL.offset=|v_#NULL.offset_1|, #length=|v_#length_1|, #NULL.base=|v_#NULL.base_1|} AuxVars[] AssignedVars[~counter~0, #NULL.offset, #NULL.base] {25#true} is VALID [2022-04-28 01:21:27,869 INFO L290 TraceCheckUtils]: 1: Hoare triple {25#true} [62] ULTIMATE.initFINAL-->ULTIMATE.initEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {25#true} is VALID [2022-04-28 01:21:27,870 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {25#true} {25#true} [79] ULTIMATE.initEXIT-->L-1: AOR: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] LVA: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {25#true} is VALID [2022-04-28 01:21:27,871 INFO L272 TraceCheckUtils]: 0: Hoare triple {25#true} [57] ULTIMATE.startENTRY-->ULTIMATE.initENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {30#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-28 01:21:27,872 INFO L290 TraceCheckUtils]: 1: Hoare triple {30#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} [59] ULTIMATE.initENTRY-->ULTIMATE.initFINAL: Formula: (let ((.cse0 (select |v_#memory_int_1| 1))) (and (= v_~counter~0_3 0) (= 48 (select .cse0 0)) (= (select |v_#valid_1| 2) 1) (= (select |v_#valid_1| 0) 0) (< 0 |v_#StackHeapBarrier_1|) (= |v_#NULL.base_1| 0) (= 1 (select |v_#valid_1| 3)) (= (select |v_#length_1| 2) 9) (= (select |v_#length_1| 3) 12) (= (select |v_#valid_1| 1) 1) (= 2 (select |v_#length_1| 1)) (= (select .cse0 1) 0) (= |v_#NULL.offset_1| 0))) InVars {#memory_int=|v_#memory_int_1|, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #length=|v_#length_1|, #valid=|v_#valid_1|} OutVars{~counter~0=v_~counter~0_3, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #valid=|v_#valid_1|, #memory_int=|v_#memory_int_1|, #NULL.offset=|v_#NULL.offset_1|, #length=|v_#length_1|, #NULL.base=|v_#NULL.base_1|} AuxVars[] AssignedVars[~counter~0, #NULL.offset, #NULL.base] {25#true} is VALID [2022-04-28 01:21:27,872 INFO L290 TraceCheckUtils]: 2: Hoare triple {25#true} [62] ULTIMATE.initFINAL-->ULTIMATE.initEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {25#true} is VALID [2022-04-28 01:21:27,872 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {25#true} {25#true} [79] ULTIMATE.initEXIT-->L-1: AOR: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] LVA: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {25#true} is VALID [2022-04-28 01:21:27,873 INFO L272 TraceCheckUtils]: 4: Hoare triple {25#true} [58] L-1-->mainENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {25#true} is VALID [2022-04-28 01:21:27,873 INFO L290 TraceCheckUtils]: 5: Hoare triple {25#true} [61] mainENTRY-->L27-3: Formula: (and (= v_main_~c~0_2 0) (<= 0 (+ |v_main_#t~nondet4_2| 2147483648)) (<= |v_main_#t~nondet4_2| 2147483647) (= v_main_~k~0_2 |v_main_#t~nondet4_2|) (= v_main_~x~0_2 0) (= v_main_~y~0_2 0)) InVars {main_#t~nondet4=|v_main_#t~nondet4_2|} OutVars{main_~c~0=v_main_~c~0_2, main_~y~0=v_main_~y~0_2, main_~x~0=v_main_~x~0_2, main_~k~0=v_main_~k~0_2} AuxVars[] AssignedVars[main_#t~nondet4, main_~x~0, main_~k~0, main_~c~0, main_~y~0] {25#true} is VALID [2022-04-28 01:21:27,874 INFO L290 TraceCheckUtils]: 6: Hoare triple {25#true} [63] L27-3-->L27-4: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] {26#false} is VALID [2022-04-28 01:21:27,874 INFO L272 TraceCheckUtils]: 7: Hoare triple {26#false} [65] L27-4-->__VERIFIER_assertENTRY: Formula: (= |v___VERIFIER_assert_#in~condInParam_2| (ite (= (+ (* (- 2) v_main_~x~0_9) v_main_~y~0_9 (* v_main_~y~0_9 v_main_~y~0_9)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_9, main_~y~0=v_main_~y~0_9} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_2|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {26#false} is VALID [2022-04-28 01:21:27,874 INFO L290 TraceCheckUtils]: 8: Hoare triple {26#false} [69] __VERIFIER_assertENTRY-->L10: Formula: (= v___VERIFIER_assert_~cond_1 |v___VERIFIER_assert_#in~cond_1|) InVars {__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|, __VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_1} AuxVars[] AssignedVars[__VERIFIER_assert_~cond] {26#false} is VALID [2022-04-28 01:21:27,875 INFO L290 TraceCheckUtils]: 9: Hoare triple {26#false} [72] L10-->L11: Formula: (= v___VERIFIER_assert_~cond_2 0) InVars {__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} OutVars{__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} AuxVars[] AssignedVars[] {26#false} is VALID [2022-04-28 01:21:27,875 INFO L290 TraceCheckUtils]: 10: Hoare triple {26#false} [76] L11-->__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {26#false} is VALID [2022-04-28 01:21:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 01:21:27,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 01:21:27,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993874514] [2022-04-28 01:21:27,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993874514] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 01:21:27,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 01:21:27,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 01:21:27,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081952233] [2022-04-28 01:21:27,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 01:21:27,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-04-28 01:21:27,888 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 01:21:27,890 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-28 01:21:27,910 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 01:21:27,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-28 01:21:27,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-28 01:21:27,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-28 01:21:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-28 01:21:27,932 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-28 01:21:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:28,008 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-04-28 01:21:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-28 01:21:28,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-04-28 01:21:28,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 01:21:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-28 01:21:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2022-04-28 01:21:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-28 01:21:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2022-04-28 01:21:28,019 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 50 transitions. [2022-04-28 01:21:28,075 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 50 edges. 50 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 01:21:28,082 INFO L225 Difference]: With dead ends: 39 [2022-04-28 01:21:28,082 INFO L226 Difference]: Without dead ends: 18 [2022-04-28 01:21:28,084 INFO L412 NwaCegarLoop]: 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 [2022-04-28 01:21:28,087 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 01:21:28,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 01:21:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-28 01:21:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-04-28 01:21:28,110 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 01:21:28,110 INFO L82 GeneralOperation]: Start isEquivalent. First operand 18 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 01:21:28,111 INFO L74 IsIncluded]: Start isIncluded. First operand 18 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 01:21:28,111 INFO L87 Difference]: Start difference. First operand 18 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 01:21:28,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:28,114 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-04-28 01:21:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-28 01:21:28,114 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 01:21:28,115 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 01:21:28,115 INFO L74 IsIncluded]: Start isIncluded. First operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 18 states. [2022-04-28 01:21:28,115 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 18 states. [2022-04-28 01:21:28,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:28,117 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-04-28 01:21:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-28 01:21:28,118 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 01:21:28,118 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 01:21:28,118 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 01:21:28,118 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 01:21:28,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 01:21:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-28 01:21:28,121 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-28 01:21:28,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 01:21:28,121 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-28 01:21:28,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-28 01:21:28,122 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-28 01:21:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-28 01:21:28,122 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 01:21:28,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 01:21:28,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-28 01:21:28,123 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 01:21:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 01:21:28,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2022-04-28 01:21:28,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 01:21:28,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141576914] [2022-04-28 01:21:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 01:21:28,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 01:21:28,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 01:21:28,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597869468] [2022-04-28 01:21:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 01:21:28,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 01:21:28,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 01:21:28,142 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) [2022-04-28 01:21:28,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-28 01:21:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 01:21:28,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-28 01:21:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 01:21:28,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 01:21:28,385 INFO L272 TraceCheckUtils]: 0: Hoare triple {146#true} [57] ULTIMATE.startENTRY-->ULTIMATE.initENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {146#true} is VALID [2022-04-28 01:21:28,386 INFO L290 TraceCheckUtils]: 1: Hoare triple {146#true} [59] ULTIMATE.initENTRY-->ULTIMATE.initFINAL: Formula: (let ((.cse0 (select |v_#memory_int_1| 1))) (and (= v_~counter~0_3 0) (= 48 (select .cse0 0)) (= (select |v_#valid_1| 2) 1) (= (select |v_#valid_1| 0) 0) (< 0 |v_#StackHeapBarrier_1|) (= |v_#NULL.base_1| 0) (= 1 (select |v_#valid_1| 3)) (= (select |v_#length_1| 2) 9) (= (select |v_#length_1| 3) 12) (= (select |v_#valid_1| 1) 1) (= 2 (select |v_#length_1| 1)) (= (select .cse0 1) 0) (= |v_#NULL.offset_1| 0))) InVars {#memory_int=|v_#memory_int_1|, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #length=|v_#length_1|, #valid=|v_#valid_1|} OutVars{~counter~0=v_~counter~0_3, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #valid=|v_#valid_1|, #memory_int=|v_#memory_int_1|, #NULL.offset=|v_#NULL.offset_1|, #length=|v_#length_1|, #NULL.base=|v_#NULL.base_1|} AuxVars[] AssignedVars[~counter~0, #NULL.offset, #NULL.base] {154#(<= ~counter~0 0)} is VALID [2022-04-28 01:21:28,387 INFO L290 TraceCheckUtils]: 2: Hoare triple {154#(<= ~counter~0 0)} [62] ULTIMATE.initFINAL-->ULTIMATE.initEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {154#(<= ~counter~0 0)} is VALID [2022-04-28 01:21:28,388 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {154#(<= ~counter~0 0)} {146#true} [79] ULTIMATE.initEXIT-->L-1: AOR: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] LVA: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {154#(<= ~counter~0 0)} is VALID [2022-04-28 01:21:28,389 INFO L272 TraceCheckUtils]: 4: Hoare triple {154#(<= ~counter~0 0)} [58] L-1-->mainENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {154#(<= ~counter~0 0)} is VALID [2022-04-28 01:21:28,392 INFO L290 TraceCheckUtils]: 5: Hoare triple {154#(<= ~counter~0 0)} [61] mainENTRY-->L27-3: Formula: (and (= v_main_~c~0_2 0) (<= 0 (+ |v_main_#t~nondet4_2| 2147483648)) (<= |v_main_#t~nondet4_2| 2147483647) (= v_main_~k~0_2 |v_main_#t~nondet4_2|) (= v_main_~x~0_2 0) (= v_main_~y~0_2 0)) InVars {main_#t~nondet4=|v_main_#t~nondet4_2|} OutVars{main_~c~0=v_main_~c~0_2, main_~y~0=v_main_~y~0_2, main_~x~0=v_main_~x~0_2, main_~k~0=v_main_~k~0_2} AuxVars[] AssignedVars[main_#t~nondet4, main_~x~0, main_~k~0, main_~c~0, main_~y~0] {154#(<= ~counter~0 0)} is VALID [2022-04-28 01:21:28,394 INFO L290 TraceCheckUtils]: 6: Hoare triple {154#(<= ~counter~0 0)} [64] L27-3-->L27-1: Formula: (and (= v_~counter~0_1 (+ |v_main_#t~post5_5| 1)) (= |v_main_#t~post5_5| v_~counter~0_2)) InVars {~counter~0=v_~counter~0_2} OutVars{~counter~0=v_~counter~0_1, main_#t~post5=|v_main_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, main_#t~post5] {170#(<= |main_#t~post5| 0)} is VALID [2022-04-28 01:21:28,395 INFO L290 TraceCheckUtils]: 7: Hoare triple {170#(<= |main_#t~post5| 0)} [66] L27-1-->L27-4: Formula: (not (< |v_main_#t~post5_2| 20)) InVars {main_#t~post5=|v_main_#t~post5_2|} OutVars{} AuxVars[] AssignedVars[main_#t~post5] {147#false} is VALID [2022-04-28 01:21:28,395 INFO L272 TraceCheckUtils]: 8: Hoare triple {147#false} [65] L27-4-->__VERIFIER_assertENTRY: Formula: (= |v___VERIFIER_assert_#in~condInParam_2| (ite (= (+ (* (- 2) v_main_~x~0_9) v_main_~y~0_9 (* v_main_~y~0_9 v_main_~y~0_9)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_9, main_~y~0=v_main_~y~0_9} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_2|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {147#false} is VALID [2022-04-28 01:21:28,395 INFO L290 TraceCheckUtils]: 9: Hoare triple {147#false} [69] __VERIFIER_assertENTRY-->L10: Formula: (= v___VERIFIER_assert_~cond_1 |v___VERIFIER_assert_#in~cond_1|) InVars {__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|, __VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_1} AuxVars[] AssignedVars[__VERIFIER_assert_~cond] {147#false} is VALID [2022-04-28 01:21:28,396 INFO L290 TraceCheckUtils]: 10: Hoare triple {147#false} [72] L10-->L11: Formula: (= v___VERIFIER_assert_~cond_2 0) InVars {__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} OutVars{__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} AuxVars[] AssignedVars[] {147#false} is VALID [2022-04-28 01:21:28,396 INFO L290 TraceCheckUtils]: 11: Hoare triple {147#false} [76] L11-->__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {147#false} is VALID [2022-04-28 01:21:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 01:21:28,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 01:21:28,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 01:21:28,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141576914] [2022-04-28 01:21:28,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 01:21:28,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597869468] [2022-04-28 01:21:28,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597869468] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 01:21:28,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 01:21:28,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-28 01:21:28,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499603421] [2022-04-28 01:21:28,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 01:21:28,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 01:21:28,401 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 01:21:28,402 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 01:21:28,413 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 01:21:28,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-28 01:21:28,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-28 01:21:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-28 01:21:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-28 01:21:28,415 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 01:21:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:28,455 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-04-28 01:21:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-28 01:21:28,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 01:21:28,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 01:21:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 01:21:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2022-04-28 01:21:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 01:21:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2022-04-28 01:21:28,460 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 28 transitions. [2022-04-28 01:21:28,481 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 01:21:28,482 INFO L225 Difference]: With dead ends: 26 [2022-04-28 01:21:28,482 INFO L226 Difference]: Without dead ends: 19 [2022-04-28 01:21:28,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-28 01:21:28,484 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 01:21:28,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 01:21:28,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-28 01:21:28,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-28 01:21:28,489 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 01:21:28,490 INFO L82 GeneralOperation]: Start isEquivalent. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 01:21:28,490 INFO L74 IsIncluded]: Start isIncluded. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 01:21:28,490 INFO L87 Difference]: Start difference. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 01:21:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:28,492 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-28 01:21:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-28 01:21:28,492 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 01:21:28,492 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 01:21:28,493 INFO L74 IsIncluded]: Start isIncluded. First operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 19 states. [2022-04-28 01:21:28,493 INFO L87 Difference]: Start difference. First operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 19 states. [2022-04-28 01:21:28,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:28,495 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-28 01:21:28,495 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-28 01:21:28,495 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 01:21:28,495 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 01:21:28,495 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 01:21:28,495 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 01:21:28,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 01:21:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-28 01:21:28,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-04-28 01:21:28,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 01:21:28,497 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-28 01:21:28,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 01:21:28,498 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-28 01:21:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-28 01:21:28,498 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 01:21:28,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 01:21:28,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-28 01:21:28,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 01:21:28,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 01:21:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 01:21:28,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2022-04-28 01:21:28,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 01:21:28,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984115687] [2022-04-28 01:21:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 01:21:28,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 01:21:28,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 01:21:28,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431514940] [2022-04-28 01:21:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 01:21:28,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 01:21:28,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 01:21:28,737 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) [2022-04-28 01:21:28,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-28 01:21:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 01:21:28,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-28 01:21:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 01:21:28,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 01:21:28,882 INFO L272 TraceCheckUtils]: 0: Hoare triple {288#true} [57] ULTIMATE.startENTRY-->ULTIMATE.initENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {288#true} is VALID [2022-04-28 01:21:28,883 INFO L290 TraceCheckUtils]: 1: Hoare triple {288#true} [59] ULTIMATE.initENTRY-->ULTIMATE.initFINAL: Formula: (let ((.cse0 (select |v_#memory_int_1| 1))) (and (= v_~counter~0_3 0) (= 48 (select .cse0 0)) (= (select |v_#valid_1| 2) 1) (= (select |v_#valid_1| 0) 0) (< 0 |v_#StackHeapBarrier_1|) (= |v_#NULL.base_1| 0) (= 1 (select |v_#valid_1| 3)) (= (select |v_#length_1| 2) 9) (= (select |v_#length_1| 3) 12) (= (select |v_#valid_1| 1) 1) (= 2 (select |v_#length_1| 1)) (= (select .cse0 1) 0) (= |v_#NULL.offset_1| 0))) InVars {#memory_int=|v_#memory_int_1|, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #length=|v_#length_1|, #valid=|v_#valid_1|} OutVars{~counter~0=v_~counter~0_3, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #valid=|v_#valid_1|, #memory_int=|v_#memory_int_1|, #NULL.offset=|v_#NULL.offset_1|, #length=|v_#length_1|, #NULL.base=|v_#NULL.base_1|} AuxVars[] AssignedVars[~counter~0, #NULL.offset, #NULL.base] {288#true} is VALID [2022-04-28 01:21:28,883 INFO L290 TraceCheckUtils]: 2: Hoare triple {288#true} [62] ULTIMATE.initFINAL-->ULTIMATE.initEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {288#true} is VALID [2022-04-28 01:21:28,883 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {288#true} {288#true} [79] ULTIMATE.initEXIT-->L-1: AOR: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] LVA: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {288#true} is VALID [2022-04-28 01:21:28,883 INFO L272 TraceCheckUtils]: 4: Hoare triple {288#true} [58] L-1-->mainENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {288#true} is VALID [2022-04-28 01:21:28,884 INFO L290 TraceCheckUtils]: 5: Hoare triple {288#true} [61] mainENTRY-->L27-3: Formula: (and (= v_main_~c~0_2 0) (<= 0 (+ |v_main_#t~nondet4_2| 2147483648)) (<= |v_main_#t~nondet4_2| 2147483647) (= v_main_~k~0_2 |v_main_#t~nondet4_2|) (= v_main_~x~0_2 0) (= v_main_~y~0_2 0)) InVars {main_#t~nondet4=|v_main_#t~nondet4_2|} OutVars{main_~c~0=v_main_~c~0_2, main_~y~0=v_main_~y~0_2, main_~x~0=v_main_~x~0_2, main_~k~0=v_main_~k~0_2} AuxVars[] AssignedVars[main_#t~nondet4, main_~x~0, main_~k~0, main_~c~0, main_~y~0] {308#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 01:21:28,885 INFO L290 TraceCheckUtils]: 6: Hoare triple {308#(and (= main_~x~0 0) (= main_~y~0 0))} [64] L27-3-->L27-1: Formula: (and (= v_~counter~0_1 (+ |v_main_#t~post5_5| 1)) (= |v_main_#t~post5_5| v_~counter~0_2)) InVars {~counter~0=v_~counter~0_2} OutVars{~counter~0=v_~counter~0_1, main_#t~post5=|v_main_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, main_#t~post5] {308#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 01:21:28,885 INFO L290 TraceCheckUtils]: 7: Hoare triple {308#(and (= main_~x~0 0) (= main_~y~0 0))} [67] L27-1-->L28: Formula: (< |v_main_#t~post5_4| 20) InVars {main_#t~post5=|v_main_#t~post5_4|} OutVars{} AuxVars[] AssignedVars[main_#t~post5] {308#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 01:21:28,886 INFO L272 TraceCheckUtils]: 8: Hoare triple {308#(and (= main_~x~0 0) (= main_~y~0 0))} [70] L28-->__VERIFIER_assertENTRY: Formula: (= |v___VERIFIER_assert_#in~condInParam_1| (ite (= (+ v_main_~y~0_8 (* (- 2) v_main_~x~0_8) (* v_main_~y~0_8 v_main_~y~0_8)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_8, main_~y~0=v_main_~y~0_8} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_1|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {318#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 01:21:28,887 INFO L290 TraceCheckUtils]: 9: Hoare triple {318#(<= 1 |__VERIFIER_assert_#in~cond|)} [69] __VERIFIER_assertENTRY-->L10: Formula: (= v___VERIFIER_assert_~cond_1 |v___VERIFIER_assert_#in~cond_1|) InVars {__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|, __VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_1} AuxVars[] AssignedVars[__VERIFIER_assert_~cond] {322#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 01:21:28,887 INFO L290 TraceCheckUtils]: 10: Hoare triple {322#(<= 1 __VERIFIER_assert_~cond)} [72] L10-->L11: Formula: (= v___VERIFIER_assert_~cond_2 0) InVars {__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} OutVars{__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} AuxVars[] AssignedVars[] {289#false} is VALID [2022-04-28 01:21:28,888 INFO L290 TraceCheckUtils]: 11: Hoare triple {289#false} [76] L11-->__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {289#false} is VALID [2022-04-28 01:21:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 01:21:28,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 01:21:28,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 01:21:28,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984115687] [2022-04-28 01:21:28,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 01:21:28,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431514940] [2022-04-28 01:21:28,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431514940] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 01:21:28,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 01:21:28,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 01:21:28,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525558672] [2022-04-28 01:21:28,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 01:21:28,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 01:21:28,890 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 01:21:28,891 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 01:21:28,901 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 01:21:28,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 01:21:28,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-28 01:21:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 01:21:28,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-28 01:21:28,902 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 01:21:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:28,992 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-28 01:21:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-28 01:21:28,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 01:21:28,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 01:21:28,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 01:21:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2022-04-28 01:21:28,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 01:21:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2022-04-28 01:21:28,996 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 31 transitions. [2022-04-28 01:21:29,022 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 31 edges. 31 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 01:21:29,023 INFO L225 Difference]: With dead ends: 28 [2022-04-28 01:21:29,023 INFO L226 Difference]: Without dead ends: 25 [2022-04-28 01:21:29,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-28 01:21:29,025 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 01:21:29,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 01:21:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-28 01:21:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-28 01:21:29,032 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 01:21:29,032 INFO L82 GeneralOperation]: Start isEquivalent. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 01:21:29,033 INFO L74 IsIncluded]: Start isIncluded. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 01:21:29,033 INFO L87 Difference]: Start difference. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 01:21:29,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:29,035 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-28 01:21:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-28 01:21:29,035 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 01:21:29,035 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 01:21:29,036 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 25 states. [2022-04-28 01:21:29,036 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 25 states. [2022-04-28 01:21:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:29,038 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-28 01:21:29,038 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-28 01:21:29,038 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 01:21:29,038 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 01:21:29,039 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 01:21:29,039 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 01:21:29,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 01:21:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-28 01:21:29,040 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2022-04-28 01:21:29,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 01:21:29,041 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-28 01:21:29,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 01:21:29,041 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-28 01:21:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-28 01:21:29,042 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 01:21:29,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 01:21:29,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-28 01:21:29,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-28 01:21:29,261 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 01:21:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 01:21:29,261 INFO L85 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2022-04-28 01:21:29,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 01:21:29,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667270556] [2022-04-28 01:21:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 01:21:29,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 01:21:29,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 01:21:29,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82694698] [2022-04-28 01:21:29,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 01:21:29,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 01:21:29,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 01:21:29,279 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) [2022-04-28 01:21:29,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-28 01:21:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 01:21:29,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-28 01:21:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 01:21:29,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 01:21:29,527 INFO L272 TraceCheckUtils]: 0: Hoare triple {456#true} [57] ULTIMATE.startENTRY-->ULTIMATE.initENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {456#true} is VALID [2022-04-28 01:21:29,528 INFO L290 TraceCheckUtils]: 1: Hoare triple {456#true} [59] ULTIMATE.initENTRY-->ULTIMATE.initFINAL: Formula: (let ((.cse0 (select |v_#memory_int_1| 1))) (and (= v_~counter~0_3 0) (= 48 (select .cse0 0)) (= (select |v_#valid_1| 2) 1) (= (select |v_#valid_1| 0) 0) (< 0 |v_#StackHeapBarrier_1|) (= |v_#NULL.base_1| 0) (= 1 (select |v_#valid_1| 3)) (= (select |v_#length_1| 2) 9) (= (select |v_#length_1| 3) 12) (= (select |v_#valid_1| 1) 1) (= 2 (select |v_#length_1| 1)) (= (select .cse0 1) 0) (= |v_#NULL.offset_1| 0))) InVars {#memory_int=|v_#memory_int_1|, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #length=|v_#length_1|, #valid=|v_#valid_1|} OutVars{~counter~0=v_~counter~0_3, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #valid=|v_#valid_1|, #memory_int=|v_#memory_int_1|, #NULL.offset=|v_#NULL.offset_1|, #length=|v_#length_1|, #NULL.base=|v_#NULL.base_1|} AuxVars[] AssignedVars[~counter~0, #NULL.offset, #NULL.base] {464#(<= ~counter~0 0)} is VALID [2022-04-28 01:21:29,528 INFO L290 TraceCheckUtils]: 2: Hoare triple {464#(<= ~counter~0 0)} [62] ULTIMATE.initFINAL-->ULTIMATE.initEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {464#(<= ~counter~0 0)} is VALID [2022-04-28 01:21:29,529 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {464#(<= ~counter~0 0)} {456#true} [79] ULTIMATE.initEXIT-->L-1: AOR: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] LVA: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {464#(<= ~counter~0 0)} is VALID [2022-04-28 01:21:29,530 INFO L272 TraceCheckUtils]: 4: Hoare triple {464#(<= ~counter~0 0)} [58] L-1-->mainENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {464#(<= ~counter~0 0)} is VALID [2022-04-28 01:21:29,530 INFO L290 TraceCheckUtils]: 5: Hoare triple {464#(<= ~counter~0 0)} [61] mainENTRY-->L27-3: Formula: (and (= v_main_~c~0_2 0) (<= 0 (+ |v_main_#t~nondet4_2| 2147483648)) (<= |v_main_#t~nondet4_2| 2147483647) (= v_main_~k~0_2 |v_main_#t~nondet4_2|) (= v_main_~x~0_2 0) (= v_main_~y~0_2 0)) InVars {main_#t~nondet4=|v_main_#t~nondet4_2|} OutVars{main_~c~0=v_main_~c~0_2, main_~y~0=v_main_~y~0_2, main_~x~0=v_main_~x~0_2, main_~k~0=v_main_~k~0_2} AuxVars[] AssignedVars[main_#t~nondet4, main_~x~0, main_~k~0, main_~c~0, main_~y~0] {464#(<= ~counter~0 0)} is VALID [2022-04-28 01:21:29,532 INFO L290 TraceCheckUtils]: 6: Hoare triple {464#(<= ~counter~0 0)} [64] L27-3-->L27-1: Formula: (and (= v_~counter~0_1 (+ |v_main_#t~post5_5| 1)) (= |v_main_#t~post5_5| v_~counter~0_2)) InVars {~counter~0=v_~counter~0_2} OutVars{~counter~0=v_~counter~0_1, main_#t~post5=|v_main_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, main_#t~post5] {480#(<= ~counter~0 1)} is VALID [2022-04-28 01:21:29,532 INFO L290 TraceCheckUtils]: 7: Hoare triple {480#(<= ~counter~0 1)} [67] L27-1-->L28: Formula: (< |v_main_#t~post5_4| 20) InVars {main_#t~post5=|v_main_#t~post5_4|} OutVars{} AuxVars[] AssignedVars[main_#t~post5] {480#(<= ~counter~0 1)} is VALID [2022-04-28 01:21:29,533 INFO L272 TraceCheckUtils]: 8: Hoare triple {480#(<= ~counter~0 1)} [70] L28-->__VERIFIER_assertENTRY: Formula: (= |v___VERIFIER_assert_#in~condInParam_1| (ite (= (+ v_main_~y~0_8 (* (- 2) v_main_~x~0_8) (* v_main_~y~0_8 v_main_~y~0_8)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_8, main_~y~0=v_main_~y~0_8} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_1|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {480#(<= ~counter~0 1)} is VALID [2022-04-28 01:21:29,534 INFO L290 TraceCheckUtils]: 9: Hoare triple {480#(<= ~counter~0 1)} [69] __VERIFIER_assertENTRY-->L10: Formula: (= v___VERIFIER_assert_~cond_1 |v___VERIFIER_assert_#in~cond_1|) InVars {__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|, __VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_1} AuxVars[] AssignedVars[__VERIFIER_assert_~cond] {480#(<= ~counter~0 1)} is VALID [2022-04-28 01:21:29,534 INFO L290 TraceCheckUtils]: 10: Hoare triple {480#(<= ~counter~0 1)} [73] L10-->L10-2: Formula: (not (= v___VERIFIER_assert_~cond_3 0)) InVars {__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_3} OutVars{__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_3} AuxVars[] AssignedVars[] {480#(<= ~counter~0 1)} is VALID [2022-04-28 01:21:29,538 INFO L290 TraceCheckUtils]: 11: Hoare triple {480#(<= ~counter~0 1)} [78] L10-2-->__VERIFIER_assertEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {480#(<= ~counter~0 1)} is VALID [2022-04-28 01:21:29,539 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {480#(<= ~counter~0 1)} {480#(<= ~counter~0 1)} [81] __VERIFIER_assertEXIT-->L28-1: AOR: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] LVA: Formula: (= |v___VERIFIER_assert_#in~condInParam_1| (ite (= (+ v_main_~y~0_8 (* (- 2) v_main_~x~0_8) (* v_main_~y~0_8 v_main_~y~0_8)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_8, main_~y~0=v_main_~y~0_8} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_1|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {480#(<= ~counter~0 1)} is VALID [2022-04-28 01:21:29,540 INFO L290 TraceCheckUtils]: 13: Hoare triple {480#(<= ~counter~0 1)} [75] L28-1-->L27-3: Formula: (and (= v_main_~y~0_5 (+ v_main_~y~0_6 1)) (< v_main_~c~0_6 v_main_~k~0_5) (= v_main_~x~0_5 (+ v_main_~x~0_6 v_main_~y~0_5)) (= (+ v_main_~c~0_6 1) v_main_~c~0_5)) InVars {main_~y~0=v_main_~y~0_6, main_~c~0=v_main_~c~0_6, main_~x~0=v_main_~x~0_6, main_~k~0=v_main_~k~0_5} OutVars{main_~y~0=v_main_~y~0_5, main_~c~0=v_main_~c~0_5, main_~x~0=v_main_~x~0_5, main_~k~0=v_main_~k~0_5} AuxVars[] AssignedVars[main_~x~0, main_~y~0, main_~c~0] {480#(<= ~counter~0 1)} is VALID [2022-04-28 01:21:29,540 INFO L290 TraceCheckUtils]: 14: Hoare triple {480#(<= ~counter~0 1)} [64] L27-3-->L27-1: Formula: (and (= v_~counter~0_1 (+ |v_main_#t~post5_5| 1)) (= |v_main_#t~post5_5| v_~counter~0_2)) InVars {~counter~0=v_~counter~0_2} OutVars{~counter~0=v_~counter~0_1, main_#t~post5=|v_main_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, main_#t~post5] {505#(<= |main_#t~post5| 1)} is VALID [2022-04-28 01:21:29,541 INFO L290 TraceCheckUtils]: 15: Hoare triple {505#(<= |main_#t~post5| 1)} [66] L27-1-->L27-4: Formula: (not (< |v_main_#t~post5_2| 20)) InVars {main_#t~post5=|v_main_#t~post5_2|} OutVars{} AuxVars[] AssignedVars[main_#t~post5] {457#false} is VALID [2022-04-28 01:21:29,541 INFO L272 TraceCheckUtils]: 16: Hoare triple {457#false} [65] L27-4-->__VERIFIER_assertENTRY: Formula: (= |v___VERIFIER_assert_#in~condInParam_2| (ite (= (+ (* (- 2) v_main_~x~0_9) v_main_~y~0_9 (* v_main_~y~0_9 v_main_~y~0_9)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_9, main_~y~0=v_main_~y~0_9} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_2|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {457#false} is VALID [2022-04-28 01:21:29,541 INFO L290 TraceCheckUtils]: 17: Hoare triple {457#false} [69] __VERIFIER_assertENTRY-->L10: Formula: (= v___VERIFIER_assert_~cond_1 |v___VERIFIER_assert_#in~cond_1|) InVars {__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|, __VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_1} AuxVars[] AssignedVars[__VERIFIER_assert_~cond] {457#false} is VALID [2022-04-28 01:21:29,541 INFO L290 TraceCheckUtils]: 18: Hoare triple {457#false} [72] L10-->L11: Formula: (= v___VERIFIER_assert_~cond_2 0) InVars {__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} OutVars{__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} AuxVars[] AssignedVars[] {457#false} is VALID [2022-04-28 01:21:29,542 INFO L290 TraceCheckUtils]: 19: Hoare triple {457#false} [76] L11-->__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {457#false} is VALID [2022-04-28 01:21:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 01:21:29,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 01:21:29,686 INFO L290 TraceCheckUtils]: 19: Hoare triple {457#false} [76] L11-->__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {457#false} is VALID [2022-04-28 01:21:29,687 INFO L290 TraceCheckUtils]: 18: Hoare triple {457#false} [72] L10-->L11: Formula: (= v___VERIFIER_assert_~cond_2 0) InVars {__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} OutVars{__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} AuxVars[] AssignedVars[] {457#false} is VALID [2022-04-28 01:21:29,687 INFO L290 TraceCheckUtils]: 17: Hoare triple {457#false} [69] __VERIFIER_assertENTRY-->L10: Formula: (= v___VERIFIER_assert_~cond_1 |v___VERIFIER_assert_#in~cond_1|) InVars {__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|, __VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_1} AuxVars[] AssignedVars[__VERIFIER_assert_~cond] {457#false} is VALID [2022-04-28 01:21:29,687 INFO L272 TraceCheckUtils]: 16: Hoare triple {457#false} [65] L27-4-->__VERIFIER_assertENTRY: Formula: (= |v___VERIFIER_assert_#in~condInParam_2| (ite (= (+ (* (- 2) v_main_~x~0_9) v_main_~y~0_9 (* v_main_~y~0_9 v_main_~y~0_9)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_9, main_~y~0=v_main_~y~0_9} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_2|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {457#false} is VALID [2022-04-28 01:21:29,688 INFO L290 TraceCheckUtils]: 15: Hoare triple {533#(< |main_#t~post5| 20)} [66] L27-1-->L27-4: Formula: (not (< |v_main_#t~post5_2| 20)) InVars {main_#t~post5=|v_main_#t~post5_2|} OutVars{} AuxVars[] AssignedVars[main_#t~post5] {457#false} is VALID [2022-04-28 01:21:29,688 INFO L290 TraceCheckUtils]: 14: Hoare triple {537#(< ~counter~0 20)} [64] L27-3-->L27-1: Formula: (and (= v_~counter~0_1 (+ |v_main_#t~post5_5| 1)) (= |v_main_#t~post5_5| v_~counter~0_2)) InVars {~counter~0=v_~counter~0_2} OutVars{~counter~0=v_~counter~0_1, main_#t~post5=|v_main_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, main_#t~post5] {533#(< |main_#t~post5| 20)} is VALID [2022-04-28 01:21:29,689 INFO L290 TraceCheckUtils]: 13: Hoare triple {537#(< ~counter~0 20)} [75] L28-1-->L27-3: Formula: (and (= v_main_~y~0_5 (+ v_main_~y~0_6 1)) (< v_main_~c~0_6 v_main_~k~0_5) (= v_main_~x~0_5 (+ v_main_~x~0_6 v_main_~y~0_5)) (= (+ v_main_~c~0_6 1) v_main_~c~0_5)) InVars {main_~y~0=v_main_~y~0_6, main_~c~0=v_main_~c~0_6, main_~x~0=v_main_~x~0_6, main_~k~0=v_main_~k~0_5} OutVars{main_~y~0=v_main_~y~0_5, main_~c~0=v_main_~c~0_5, main_~x~0=v_main_~x~0_5, main_~k~0=v_main_~k~0_5} AuxVars[] AssignedVars[main_~x~0, main_~y~0, main_~c~0] {537#(< ~counter~0 20)} is VALID [2022-04-28 01:21:29,689 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {456#true} {537#(< ~counter~0 20)} [81] __VERIFIER_assertEXIT-->L28-1: AOR: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] LVA: Formula: (= |v___VERIFIER_assert_#in~condInParam_1| (ite (= (+ v_main_~y~0_8 (* (- 2) v_main_~x~0_8) (* v_main_~y~0_8 v_main_~y~0_8)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_8, main_~y~0=v_main_~y~0_8} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_1|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {537#(< ~counter~0 20)} is VALID [2022-04-28 01:21:29,690 INFO L290 TraceCheckUtils]: 11: Hoare triple {456#true} [78] L10-2-->__VERIFIER_assertEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {456#true} is VALID [2022-04-28 01:21:29,690 INFO L290 TraceCheckUtils]: 10: Hoare triple {456#true} [73] L10-->L10-2: Formula: (not (= v___VERIFIER_assert_~cond_3 0)) InVars {__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_3} OutVars{__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_3} AuxVars[] AssignedVars[] {456#true} is VALID [2022-04-28 01:21:29,690 INFO L290 TraceCheckUtils]: 9: Hoare triple {456#true} [69] __VERIFIER_assertENTRY-->L10: Formula: (= v___VERIFIER_assert_~cond_1 |v___VERIFIER_assert_#in~cond_1|) InVars {__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|, __VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_1} AuxVars[] AssignedVars[__VERIFIER_assert_~cond] {456#true} is VALID [2022-04-28 01:21:29,690 INFO L272 TraceCheckUtils]: 8: Hoare triple {537#(< ~counter~0 20)} [70] L28-->__VERIFIER_assertENTRY: Formula: (= |v___VERIFIER_assert_#in~condInParam_1| (ite (= (+ v_main_~y~0_8 (* (- 2) v_main_~x~0_8) (* v_main_~y~0_8 v_main_~y~0_8)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_8, main_~y~0=v_main_~y~0_8} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_1|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {456#true} is VALID [2022-04-28 01:21:29,692 INFO L290 TraceCheckUtils]: 7: Hoare triple {537#(< ~counter~0 20)} [67] L27-1-->L28: Formula: (< |v_main_#t~post5_4| 20) InVars {main_#t~post5=|v_main_#t~post5_4|} OutVars{} AuxVars[] AssignedVars[main_#t~post5] {537#(< ~counter~0 20)} is VALID [2022-04-28 01:21:29,693 INFO L290 TraceCheckUtils]: 6: Hoare triple {562#(< ~counter~0 19)} [64] L27-3-->L27-1: Formula: (and (= v_~counter~0_1 (+ |v_main_#t~post5_5| 1)) (= |v_main_#t~post5_5| v_~counter~0_2)) InVars {~counter~0=v_~counter~0_2} OutVars{~counter~0=v_~counter~0_1, main_#t~post5=|v_main_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, main_#t~post5] {537#(< ~counter~0 20)} is VALID [2022-04-28 01:21:29,698 INFO L290 TraceCheckUtils]: 5: Hoare triple {562#(< ~counter~0 19)} [61] mainENTRY-->L27-3: Formula: (and (= v_main_~c~0_2 0) (<= 0 (+ |v_main_#t~nondet4_2| 2147483648)) (<= |v_main_#t~nondet4_2| 2147483647) (= v_main_~k~0_2 |v_main_#t~nondet4_2|) (= v_main_~x~0_2 0) (= v_main_~y~0_2 0)) InVars {main_#t~nondet4=|v_main_#t~nondet4_2|} OutVars{main_~c~0=v_main_~c~0_2, main_~y~0=v_main_~y~0_2, main_~x~0=v_main_~x~0_2, main_~k~0=v_main_~k~0_2} AuxVars[] AssignedVars[main_#t~nondet4, main_~x~0, main_~k~0, main_~c~0, main_~y~0] {562#(< ~counter~0 19)} is VALID [2022-04-28 01:21:29,698 INFO L272 TraceCheckUtils]: 4: Hoare triple {562#(< ~counter~0 19)} [58] L-1-->mainENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {562#(< ~counter~0 19)} is VALID [2022-04-28 01:21:29,699 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {562#(< ~counter~0 19)} {456#true} [79] ULTIMATE.initEXIT-->L-1: AOR: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] LVA: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {562#(< ~counter~0 19)} is VALID [2022-04-28 01:21:29,699 INFO L290 TraceCheckUtils]: 2: Hoare triple {562#(< ~counter~0 19)} [62] ULTIMATE.initFINAL-->ULTIMATE.initEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {562#(< ~counter~0 19)} is VALID [2022-04-28 01:21:29,700 INFO L290 TraceCheckUtils]: 1: Hoare triple {456#true} [59] ULTIMATE.initENTRY-->ULTIMATE.initFINAL: Formula: (let ((.cse0 (select |v_#memory_int_1| 1))) (and (= v_~counter~0_3 0) (= 48 (select .cse0 0)) (= (select |v_#valid_1| 2) 1) (= (select |v_#valid_1| 0) 0) (< 0 |v_#StackHeapBarrier_1|) (= |v_#NULL.base_1| 0) (= 1 (select |v_#valid_1| 3)) (= (select |v_#length_1| 2) 9) (= (select |v_#length_1| 3) 12) (= (select |v_#valid_1| 1) 1) (= 2 (select |v_#length_1| 1)) (= (select .cse0 1) 0) (= |v_#NULL.offset_1| 0))) InVars {#memory_int=|v_#memory_int_1|, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #length=|v_#length_1|, #valid=|v_#valid_1|} OutVars{~counter~0=v_~counter~0_3, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #valid=|v_#valid_1|, #memory_int=|v_#memory_int_1|, #NULL.offset=|v_#NULL.offset_1|, #length=|v_#length_1|, #NULL.base=|v_#NULL.base_1|} AuxVars[] AssignedVars[~counter~0, #NULL.offset, #NULL.base] {562#(< ~counter~0 19)} is VALID [2022-04-28 01:21:29,700 INFO L272 TraceCheckUtils]: 0: Hoare triple {456#true} [57] ULTIMATE.startENTRY-->ULTIMATE.initENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {456#true} is VALID [2022-04-28 01:21:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 01:21:29,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 01:21:29,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667270556] [2022-04-28 01:21:29,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 01:21:29,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82694698] [2022-04-28 01:21:29,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82694698] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-28 01:21:29,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-28 01:21:29,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-28 01:21:29,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935467097] [2022-04-28 01:21:29,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-28 01:21:29,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-04-28 01:21:29,703 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 01:21:29,704 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-28 01:21:29,729 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 35 edges. 35 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 01:21:29,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-28 01:21:29,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-28 01:21:29,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-28 01:21:29,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-28 01:21:29,731 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-28 01:21:29,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:29,880 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-04-28 01:21:29,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-28 01:21:29,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-04-28 01:21:29,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 01:21:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-28 01:21:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 62 transitions. [2022-04-28 01:21:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-28 01:21:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 62 transitions. [2022-04-28 01:21:29,893 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 10 states and 62 transitions. [2022-04-28 01:21:29,938 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 62 edges. 62 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 01:21:29,940 INFO L225 Difference]: With dead ends: 56 [2022-04-28 01:21:29,940 INFO L226 Difference]: Without dead ends: 49 [2022-04-28 01:21:29,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-28 01:21:29,941 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 01:21:29,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 69 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 01:21:29,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-28 01:21:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-04-28 01:21:29,957 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 01:21:29,957 INFO L82 GeneralOperation]: Start isEquivalent. First operand 49 states. Second operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-28 01:21:29,957 INFO L74 IsIncluded]: Start isIncluded. First operand 49 states. Second operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-28 01:21:29,958 INFO L87 Difference]: Start difference. First operand 49 states. Second operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-28 01:21:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:29,960 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-04-28 01:21:29,960 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-04-28 01:21:29,961 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 01:21:29,961 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 01:21:29,961 INFO L74 IsIncluded]: Start isIncluded. First operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 49 states. [2022-04-28 01:21:29,962 INFO L87 Difference]: Start difference. First operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 49 states. [2022-04-28 01:21:29,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:29,964 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-04-28 01:21:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-04-28 01:21:29,965 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 01:21:29,965 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 01:21:29,965 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 01:21:29,965 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 01:21:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-28 01:21:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-04-28 01:21:29,967 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 20 [2022-04-28 01:21:29,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 01:21:29,967 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-04-28 01:21:29,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-28 01:21:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-04-28 01:21:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-28 01:21:29,968 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 01:21:29,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 01:21:29,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-28 01:21:30,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 01:21:30,184 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 01:21:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 01:21:30,184 INFO L85 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2022-04-28 01:21:30,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 01:21:30,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5986068] [2022-04-28 01:21:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 01:21:30,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 01:21:30,198 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 01:21:30,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708940179] [2022-04-28 01:21:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 01:21:30,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 01:21:30,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 01:21:30,205 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) [2022-04-28 01:21:30,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-28 01:21:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 01:21:30,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-28 01:21:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 01:21:30,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 01:21:30,366 INFO L272 TraceCheckUtils]: 0: Hoare triple {830#true} [57] ULTIMATE.startENTRY-->ULTIMATE.initENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {830#true} is VALID [2022-04-28 01:21:30,367 INFO L290 TraceCheckUtils]: 1: Hoare triple {830#true} [59] ULTIMATE.initENTRY-->ULTIMATE.initFINAL: Formula: (let ((.cse0 (select |v_#memory_int_1| 1))) (and (= v_~counter~0_3 0) (= 48 (select .cse0 0)) (= (select |v_#valid_1| 2) 1) (= (select |v_#valid_1| 0) 0) (< 0 |v_#StackHeapBarrier_1|) (= |v_#NULL.base_1| 0) (= 1 (select |v_#valid_1| 3)) (= (select |v_#length_1| 2) 9) (= (select |v_#length_1| 3) 12) (= (select |v_#valid_1| 1) 1) (= 2 (select |v_#length_1| 1)) (= (select .cse0 1) 0) (= |v_#NULL.offset_1| 0))) InVars {#memory_int=|v_#memory_int_1|, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #length=|v_#length_1|, #valid=|v_#valid_1|} OutVars{~counter~0=v_~counter~0_3, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #valid=|v_#valid_1|, #memory_int=|v_#memory_int_1|, #NULL.offset=|v_#NULL.offset_1|, #length=|v_#length_1|, #NULL.base=|v_#NULL.base_1|} AuxVars[] AssignedVars[~counter~0, #NULL.offset, #NULL.base] {830#true} is VALID [2022-04-28 01:21:30,367 INFO L290 TraceCheckUtils]: 2: Hoare triple {830#true} [62] ULTIMATE.initFINAL-->ULTIMATE.initEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {830#true} is VALID [2022-04-28 01:21:30,367 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {830#true} {830#true} [79] ULTIMATE.initEXIT-->L-1: AOR: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] LVA: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {830#true} is VALID [2022-04-28 01:21:30,367 INFO L272 TraceCheckUtils]: 4: Hoare triple {830#true} [58] L-1-->mainENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {830#true} is VALID [2022-04-28 01:21:30,368 INFO L290 TraceCheckUtils]: 5: Hoare triple {830#true} [61] mainENTRY-->L27-3: Formula: (and (= v_main_~c~0_2 0) (<= 0 (+ |v_main_#t~nondet4_2| 2147483648)) (<= |v_main_#t~nondet4_2| 2147483647) (= v_main_~k~0_2 |v_main_#t~nondet4_2|) (= v_main_~x~0_2 0) (= v_main_~y~0_2 0)) InVars {main_#t~nondet4=|v_main_#t~nondet4_2|} OutVars{main_~c~0=v_main_~c~0_2, main_~y~0=v_main_~y~0_2, main_~x~0=v_main_~x~0_2, main_~k~0=v_main_~k~0_2} AuxVars[] AssignedVars[main_#t~nondet4, main_~x~0, main_~k~0, main_~c~0, main_~y~0] {850#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 01:21:30,369 INFO L290 TraceCheckUtils]: 6: Hoare triple {850#(and (= main_~x~0 0) (= main_~y~0 0))} [64] L27-3-->L27-1: Formula: (and (= v_~counter~0_1 (+ |v_main_#t~post5_5| 1)) (= |v_main_#t~post5_5| v_~counter~0_2)) InVars {~counter~0=v_~counter~0_2} OutVars{~counter~0=v_~counter~0_1, main_#t~post5=|v_main_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, main_#t~post5] {850#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 01:21:30,369 INFO L290 TraceCheckUtils]: 7: Hoare triple {850#(and (= main_~x~0 0) (= main_~y~0 0))} [67] L27-1-->L28: Formula: (< |v_main_#t~post5_4| 20) InVars {main_#t~post5=|v_main_#t~post5_4|} OutVars{} AuxVars[] AssignedVars[main_#t~post5] {850#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 01:21:30,369 INFO L272 TraceCheckUtils]: 8: Hoare triple {850#(and (= main_~x~0 0) (= main_~y~0 0))} [70] L28-->__VERIFIER_assertENTRY: Formula: (= |v___VERIFIER_assert_#in~condInParam_1| (ite (= (+ v_main_~y~0_8 (* (- 2) v_main_~x~0_8) (* v_main_~y~0_8 v_main_~y~0_8)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_8, main_~y~0=v_main_~y~0_8} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_1|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {830#true} is VALID [2022-04-28 01:21:30,369 INFO L290 TraceCheckUtils]: 9: Hoare triple {830#true} [69] __VERIFIER_assertENTRY-->L10: Formula: (= v___VERIFIER_assert_~cond_1 |v___VERIFIER_assert_#in~cond_1|) InVars {__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|, __VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_1} AuxVars[] AssignedVars[__VERIFIER_assert_~cond] {830#true} is VALID [2022-04-28 01:21:30,370 INFO L290 TraceCheckUtils]: 10: Hoare triple {830#true} [73] L10-->L10-2: Formula: (not (= v___VERIFIER_assert_~cond_3 0)) InVars {__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_3} OutVars{__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_3} AuxVars[] AssignedVars[] {830#true} is VALID [2022-04-28 01:21:30,370 INFO L290 TraceCheckUtils]: 11: Hoare triple {830#true} [78] L10-2-->__VERIFIER_assertEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {830#true} is VALID [2022-04-28 01:21:30,370 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {830#true} {850#(and (= main_~x~0 0) (= main_~y~0 0))} [81] __VERIFIER_assertEXIT-->L28-1: AOR: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] LVA: Formula: (= |v___VERIFIER_assert_#in~condInParam_1| (ite (= (+ v_main_~y~0_8 (* (- 2) v_main_~x~0_8) (* v_main_~y~0_8 v_main_~y~0_8)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_8, main_~y~0=v_main_~y~0_8} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_1|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {850#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 01:21:30,375 INFO L290 TraceCheckUtils]: 13: Hoare triple {850#(and (= main_~x~0 0) (= main_~y~0 0))} [75] L28-1-->L27-3: Formula: (and (= v_main_~y~0_5 (+ v_main_~y~0_6 1)) (< v_main_~c~0_6 v_main_~k~0_5) (= v_main_~x~0_5 (+ v_main_~x~0_6 v_main_~y~0_5)) (= (+ v_main_~c~0_6 1) v_main_~c~0_5)) InVars {main_~y~0=v_main_~y~0_6, main_~c~0=v_main_~c~0_6, main_~x~0=v_main_~x~0_6, main_~k~0=v_main_~k~0_5} OutVars{main_~y~0=v_main_~y~0_5, main_~c~0=v_main_~c~0_5, main_~x~0=v_main_~x~0_5, main_~k~0=v_main_~k~0_5} AuxVars[] AssignedVars[main_~x~0, main_~y~0, main_~c~0] {875#(and (= main_~y~0 1) (= (+ main_~x~0 (* (- 1) main_~y~0)) 0))} is VALID [2022-04-28 01:21:30,376 INFO L290 TraceCheckUtils]: 14: Hoare triple {875#(and (= main_~y~0 1) (= (+ main_~x~0 (* (- 1) main_~y~0)) 0))} [64] L27-3-->L27-1: Formula: (and (= v_~counter~0_1 (+ |v_main_#t~post5_5| 1)) (= |v_main_#t~post5_5| v_~counter~0_2)) InVars {~counter~0=v_~counter~0_2} OutVars{~counter~0=v_~counter~0_1, main_#t~post5=|v_main_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, main_#t~post5] {875#(and (= main_~y~0 1) (= (+ main_~x~0 (* (- 1) main_~y~0)) 0))} is VALID [2022-04-28 01:21:30,377 INFO L290 TraceCheckUtils]: 15: Hoare triple {875#(and (= main_~y~0 1) (= (+ main_~x~0 (* (- 1) main_~y~0)) 0))} [67] L27-1-->L28: Formula: (< |v_main_#t~post5_4| 20) InVars {main_#t~post5=|v_main_#t~post5_4|} OutVars{} AuxVars[] AssignedVars[main_#t~post5] {875#(and (= main_~y~0 1) (= (+ main_~x~0 (* (- 1) main_~y~0)) 0))} is VALID [2022-04-28 01:21:30,377 INFO L272 TraceCheckUtils]: 16: Hoare triple {875#(and (= main_~y~0 1) (= (+ main_~x~0 (* (- 1) main_~y~0)) 0))} [70] L28-->__VERIFIER_assertENTRY: Formula: (= |v___VERIFIER_assert_#in~condInParam_1| (ite (= (+ v_main_~y~0_8 (* (- 2) v_main_~x~0_8) (* v_main_~y~0_8 v_main_~y~0_8)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_8, main_~y~0=v_main_~y~0_8} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_1|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {885#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 01:21:30,378 INFO L290 TraceCheckUtils]: 17: Hoare triple {885#(<= 1 |__VERIFIER_assert_#in~cond|)} [69] __VERIFIER_assertENTRY-->L10: Formula: (= v___VERIFIER_assert_~cond_1 |v___VERIFIER_assert_#in~cond_1|) InVars {__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|, __VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_1} AuxVars[] AssignedVars[__VERIFIER_assert_~cond] {889#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 01:21:30,378 INFO L290 TraceCheckUtils]: 18: Hoare triple {889#(<= 1 __VERIFIER_assert_~cond)} [72] L10-->L11: Formula: (= v___VERIFIER_assert_~cond_2 0) InVars {__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} OutVars{__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} AuxVars[] AssignedVars[] {831#false} is VALID [2022-04-28 01:21:30,378 INFO L290 TraceCheckUtils]: 19: Hoare triple {831#false} [76] L11-->__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {831#false} is VALID [2022-04-28 01:21:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 01:21:30,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 01:21:30,501 INFO L290 TraceCheckUtils]: 19: Hoare triple {831#false} [76] L11-->__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {831#false} is VALID [2022-04-28 01:21:30,502 INFO L290 TraceCheckUtils]: 18: Hoare triple {889#(<= 1 __VERIFIER_assert_~cond)} [72] L10-->L11: Formula: (= v___VERIFIER_assert_~cond_2 0) InVars {__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} OutVars{__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_2} AuxVars[] AssignedVars[] {831#false} is VALID [2022-04-28 01:21:30,502 INFO L290 TraceCheckUtils]: 17: Hoare triple {885#(<= 1 |__VERIFIER_assert_#in~cond|)} [69] __VERIFIER_assertENTRY-->L10: Formula: (= v___VERIFIER_assert_~cond_1 |v___VERIFIER_assert_#in~cond_1|) InVars {__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|, __VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_1} AuxVars[] AssignedVars[__VERIFIER_assert_~cond] {889#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 01:21:30,503 INFO L272 TraceCheckUtils]: 16: Hoare triple {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} [70] L28-->__VERIFIER_assertENTRY: Formula: (= |v___VERIFIER_assert_#in~condInParam_1| (ite (= (+ v_main_~y~0_8 (* (- 2) v_main_~x~0_8) (* v_main_~y~0_8 v_main_~y~0_8)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_8, main_~y~0=v_main_~y~0_8} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_1|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {885#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 01:21:30,503 INFO L290 TraceCheckUtils]: 15: Hoare triple {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} [67] L27-1-->L28: Formula: (< |v_main_#t~post5_4| 20) InVars {main_#t~post5=|v_main_#t~post5_4|} OutVars{} AuxVars[] AssignedVars[main_#t~post5] {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} is VALID [2022-04-28 01:21:30,504 INFO L290 TraceCheckUtils]: 14: Hoare triple {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} [64] L27-3-->L27-1: Formula: (and (= v_~counter~0_1 (+ |v_main_#t~post5_5| 1)) (= |v_main_#t~post5_5| v_~counter~0_2)) InVars {~counter~0=v_~counter~0_2} OutVars{~counter~0=v_~counter~0_1, main_#t~post5=|v_main_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, main_#t~post5] {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} is VALID [2022-04-28 01:21:30,507 INFO L290 TraceCheckUtils]: 13: Hoare triple {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} [75] L28-1-->L27-3: Formula: (and (= v_main_~y~0_5 (+ v_main_~y~0_6 1)) (< v_main_~c~0_6 v_main_~k~0_5) (= v_main_~x~0_5 (+ v_main_~x~0_6 v_main_~y~0_5)) (= (+ v_main_~c~0_6 1) v_main_~c~0_5)) InVars {main_~y~0=v_main_~y~0_6, main_~c~0=v_main_~c~0_6, main_~x~0=v_main_~x~0_6, main_~k~0=v_main_~k~0_5} OutVars{main_~y~0=v_main_~y~0_5, main_~c~0=v_main_~c~0_5, main_~x~0=v_main_~x~0_5, main_~k~0=v_main_~k~0_5} AuxVars[] AssignedVars[main_~x~0, main_~y~0, main_~c~0] {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} is VALID [2022-04-28 01:21:30,509 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {830#true} {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} [81] __VERIFIER_assertEXIT-->L28-1: AOR: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] LVA: Formula: (= |v___VERIFIER_assert_#in~condInParam_1| (ite (= (+ v_main_~y~0_8 (* (- 2) v_main_~x~0_8) (* v_main_~y~0_8 v_main_~y~0_8)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_8, main_~y~0=v_main_~y~0_8} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_1|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} is VALID [2022-04-28 01:21:30,509 INFO L290 TraceCheckUtils]: 11: Hoare triple {830#true} [78] L10-2-->__VERIFIER_assertEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {830#true} is VALID [2022-04-28 01:21:30,509 INFO L290 TraceCheckUtils]: 10: Hoare triple {830#true} [73] L10-->L10-2: Formula: (not (= v___VERIFIER_assert_~cond_3 0)) InVars {__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_3} OutVars{__VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_3} AuxVars[] AssignedVars[] {830#true} is VALID [2022-04-28 01:21:30,509 INFO L290 TraceCheckUtils]: 9: Hoare triple {830#true} [69] __VERIFIER_assertENTRY-->L10: Formula: (= v___VERIFIER_assert_~cond_1 |v___VERIFIER_assert_#in~cond_1|) InVars {__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~cond_1|, __VERIFIER_assert_~cond=v___VERIFIER_assert_~cond_1} AuxVars[] AssignedVars[__VERIFIER_assert_~cond] {830#true} is VALID [2022-04-28 01:21:30,509 INFO L272 TraceCheckUtils]: 8: Hoare triple {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} [70] L28-->__VERIFIER_assertENTRY: Formula: (= |v___VERIFIER_assert_#in~condInParam_1| (ite (= (+ v_main_~y~0_8 (* (- 2) v_main_~x~0_8) (* v_main_~y~0_8 v_main_~y~0_8)) 0) 1 0)) InVars {main_~x~0=v_main_~x~0_8, main_~y~0=v_main_~y~0_8} OutVars{__VERIFIER_assert_#in~cond=|v___VERIFIER_assert_#in~condInParam_1|} AuxVars[] AssignedVars[__VERIFIER_assert_#in~cond, main_~x~0, main_~y~0] {830#true} is VALID [2022-04-28 01:21:30,511 INFO L290 TraceCheckUtils]: 7: Hoare triple {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} [67] L27-1-->L28: Formula: (< |v_main_#t~post5_4| 20) InVars {main_#t~post5=|v_main_#t~post5_4|} OutVars{} AuxVars[] AssignedVars[main_#t~post5] {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} is VALID [2022-04-28 01:21:30,512 INFO L290 TraceCheckUtils]: 6: Hoare triple {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} [64] L27-3-->L27-1: Formula: (and (= v_~counter~0_1 (+ |v_main_#t~post5_5| 1)) (= |v_main_#t~post5_5| v_~counter~0_2)) InVars {~counter~0=v_~counter~0_2} OutVars{~counter~0=v_~counter~0_1, main_#t~post5=|v_main_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, main_#t~post5] {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} is VALID [2022-04-28 01:21:30,514 INFO L290 TraceCheckUtils]: 5: Hoare triple {830#true} [61] mainENTRY-->L27-3: Formula: (and (= v_main_~c~0_2 0) (<= 0 (+ |v_main_#t~nondet4_2| 2147483648)) (<= |v_main_#t~nondet4_2| 2147483647) (= v_main_~k~0_2 |v_main_#t~nondet4_2|) (= v_main_~x~0_2 0) (= v_main_~y~0_2 0)) InVars {main_#t~nondet4=|v_main_#t~nondet4_2|} OutVars{main_~c~0=v_main_~c~0_2, main_~y~0=v_main_~y~0_2, main_~x~0=v_main_~x~0_2, main_~k~0=v_main_~k~0_2} AuxVars[] AssignedVars[main_#t~nondet4, main_~x~0, main_~k~0, main_~c~0, main_~y~0] {905#(= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))} is VALID [2022-04-28 01:21:30,514 INFO L272 TraceCheckUtils]: 4: Hoare triple {830#true} [58] L-1-->mainENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {830#true} is VALID [2022-04-28 01:21:30,514 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {830#true} {830#true} [79] ULTIMATE.initEXIT-->L-1: AOR: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] LVA: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {830#true} is VALID [2022-04-28 01:21:30,514 INFO L290 TraceCheckUtils]: 2: Hoare triple {830#true} [62] ULTIMATE.initFINAL-->ULTIMATE.initEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {830#true} is VALID [2022-04-28 01:21:30,514 INFO L290 TraceCheckUtils]: 1: Hoare triple {830#true} [59] ULTIMATE.initENTRY-->ULTIMATE.initFINAL: Formula: (let ((.cse0 (select |v_#memory_int_1| 1))) (and (= v_~counter~0_3 0) (= 48 (select .cse0 0)) (= (select |v_#valid_1| 2) 1) (= (select |v_#valid_1| 0) 0) (< 0 |v_#StackHeapBarrier_1|) (= |v_#NULL.base_1| 0) (= 1 (select |v_#valid_1| 3)) (= (select |v_#length_1| 2) 9) (= (select |v_#length_1| 3) 12) (= (select |v_#valid_1| 1) 1) (= 2 (select |v_#length_1| 1)) (= (select .cse0 1) 0) (= |v_#NULL.offset_1| 0))) InVars {#memory_int=|v_#memory_int_1|, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #length=|v_#length_1|, #valid=|v_#valid_1|} OutVars{~counter~0=v_~counter~0_3, #StackHeapBarrier=|v_#StackHeapBarrier_1|, #valid=|v_#valid_1|, #memory_int=|v_#memory_int_1|, #NULL.offset=|v_#NULL.offset_1|, #length=|v_#length_1|, #NULL.base=|v_#NULL.base_1|} AuxVars[] AssignedVars[~counter~0, #NULL.offset, #NULL.base] {830#true} is VALID [2022-04-28 01:21:30,515 INFO L272 TraceCheckUtils]: 0: Hoare triple {830#true} [57] ULTIMATE.startENTRY-->ULTIMATE.initENTRY: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] {830#true} is VALID [2022-04-28 01:21:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-28 01:21:30,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 01:21:30,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5986068] [2022-04-28 01:21:30,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 01:21:30,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708940179] [2022-04-28 01:21:30,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708940179] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-28 01:21:30,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-28 01:21:30,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-28 01:21:30,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655998192] [2022-04-28 01:21:30,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 01:21:30,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-28 01:21:30,517 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 01:21:30,517 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 01:21:30,532 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 01:21:30,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 01:21:30,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-28 01:21:30,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 01:21:30,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-28 01:21:30,533 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 01:21:30,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:30,596 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-04-28 01:21:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-28 01:21:30,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-28 01:21:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 01:21:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 01:21:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2022-04-28 01:21:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 01:21:30,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2022-04-28 01:21:30,599 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 19 transitions. [2022-04-28 01:21:33,043 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 18 inductive. 0 not inductive. 1 times theorem prover too weak to decide inductivity. [2022-04-28 01:21:33,043 INFO L225 Difference]: With dead ends: 45 [2022-04-28 01:21:33,043 INFO L226 Difference]: Without dead ends: 0 [2022-04-28 01:21:33,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-28 01:21:33,045 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 01:21:33,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 01:21:33,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-28 01:21:33,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-28 01:21:33,045 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 01:21:33,046 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second 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) [2022-04-28 01:21:33,046 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second 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) [2022-04-28 01:21:33,046 INFO L87 Difference]: Start difference. First operand 0 states. Second 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) [2022-04-28 01:21:33,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:33,046 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-04-28 01:21:33,046 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-28 01:21:33,046 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 01:21:33,046 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 01:21:33,046 INFO L74 IsIncluded]: Start isIncluded. First 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) Second operand 0 states. [2022-04-28 01:21:33,046 INFO L87 Difference]: Start difference. First 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) Second operand 0 states. [2022-04-28 01:21:33,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 01:21:33,047 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-04-28 01:21:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-28 01:21:33,047 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 01:21:33,047 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 01:21:33,047 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 01:21:33,047 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 01:21:33,047 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) [2022-04-28 01:21:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-28 01:21:33,047 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2022-04-28 01:21:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 01:21:33,047 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-28 01:21:33,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 01:21:33,048 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-28 01:21:33,048 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 01:21:33,050 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-28 01:21:33,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-28 01:21:33,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 01:21:33,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-28 01:21:33,346 INFO L895 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-28 01:21:33,347 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-28 01:21:33,347 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-28 01:21:33,347 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-28 01:21:33,347 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-28 01:21:33,347 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-28 01:21:33,347 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-28 01:21:33,347 INFO L895 garLoopResultBuilder]: At program point mainENTRY(lines 18 40) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-04-28 01:21:33,347 INFO L895 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))) [2022-04-28 01:21:33,347 INFO L895 garLoopResultBuilder]: At program point L27-4(lines 27 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))) [2022-04-28 01:21:33,348 INFO L899 garLoopResultBuilder]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2022-04-28 01:21:33,348 INFO L899 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2022-04-28 01:21:33,348 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))) [2022-04-28 01:21:33,348 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 18 40) no Hoare annotation was computed. [2022-04-28 01:21:33,348 INFO L899 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2022-04-28 01:21:33,348 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 18 40) no Hoare annotation was computed. [2022-04-28 01:21:33,348 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-04-28 01:21:33,348 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2022-04-28 01:21:33,348 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2022-04-28 01:21:33,348 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2022-04-28 01:21:33,348 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2022-04-28 01:21:33,349 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2022-04-28 01:21:33,351 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-04-28 01:21:33,353 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-04-28 01:21:33,356 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2022-04-28 01:21:33,357 WARN L170 areAnnotationChecker]: L10 has no Hoare annotation [2022-04-28 01:21:33,357 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2022-04-28 01:21:33,357 WARN L170 areAnnotationChecker]: L27-1 has no Hoare annotation [2022-04-28 01:21:33,357 WARN L170 areAnnotationChecker]: L10 has no Hoare annotation [2022-04-28 01:21:33,357 WARN L170 areAnnotationChecker]: L10 has no Hoare annotation [2022-04-28 01:21:33,358 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2022-04-28 01:21:33,358 WARN L170 areAnnotationChecker]: L27-1 has no Hoare annotation [2022-04-28 01:21:33,358 WARN L170 areAnnotationChecker]: L27-1 has no Hoare annotation [2022-04-28 01:21:33,358 WARN L170 areAnnotationChecker]: L11 has no Hoare annotation [2022-04-28 01:21:33,358 WARN L170 areAnnotationChecker]: L11 has no Hoare annotation [2022-04-28 01:21:33,358 WARN L170 areAnnotationChecker]: L10-2 has no Hoare annotation [2022-04-28 01:21:33,358 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2022-04-28 01:21:33,358 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2022-04-28 01:21:33,358 WARN L170 areAnnotationChecker]: L28-1 has no Hoare annotation [2022-04-28 01:21:33,358 WARN L170 areAnnotationChecker]: L28-1 has no Hoare annotation [2022-04-28 01:21:33,358 WARN L170 areAnnotationChecker]: L37 has no Hoare annotation [2022-04-28 01:21:33,358 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2022-04-28 01:21:33,359 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2022-04-28 01:21:33,359 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2022-04-28 01:21:33,359 INFO L163 areAnnotationChecker]: CFG has 6 edges. 6 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2022-04-28 01:21:33,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.04 01:21:33 BasicIcfg [2022-04-28 01:21:33,367 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-28 01:21:33,368 INFO L158 Benchmark]: Toolchain (without parser) took 6328.07ms. Allocated memory was 191.9MB in the beginning and 235.9MB in the end (delta: 44.0MB). Free memory was 135.5MB in the beginning and 120.2MB in the end (delta: 15.3MB). Peak memory consumption was 59.3MB. Max. memory is 8.0GB. [2022-04-28 01:21:33,368 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 191.9MB. Free memory is still 151.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-28 01:21:33,369 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.86ms. Allocated memory was 191.9MB in the beginning and 235.9MB in the end (delta: 44.0MB). Free memory was 135.2MB in the beginning and 206.5MB in the end (delta: -71.3MB). Peak memory consumption was 8.2MB. Max. memory is 8.0GB. [2022-04-28 01:21:33,369 INFO L158 Benchmark]: Boogie Preprocessor took 23.95ms. Allocated memory is still 235.9MB. Free memory was 206.5MB in the beginning and 204.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-28 01:21:33,369 INFO L158 Benchmark]: RCFGBuilder took 229.00ms. Allocated memory is still 235.9MB. Free memory was 204.9MB in the beginning and 194.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-28 01:21:33,370 INFO L158 Benchmark]: IcfgTransformer took 22.34ms. Allocated memory is still 235.9MB. Free memory was 194.4MB in the beginning and 192.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-28 01:21:33,370 INFO L158 Benchmark]: TraceAbstraction took 5843.85ms. Allocated memory is still 235.9MB. Free memory was 192.3MB in the beginning and 120.2MB in the end (delta: 72.1MB). Peak memory consumption was 73.1MB. Max. memory is 8.0GB. [2022-04-28 01:21:33,372 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 191.9MB. Free memory is still 151.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.86ms. Allocated memory was 191.9MB in the beginning and 235.9MB in the end (delta: 44.0MB). Free memory was 135.2MB in the beginning and 206.5MB in the end (delta: -71.3MB). Peak memory consumption was 8.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.95ms. Allocated memory is still 235.9MB. Free memory was 206.5MB in the beginning and 204.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 229.00ms. Allocated memory is still 235.9MB. Free memory was 204.9MB in the beginning and 194.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 22.34ms. Allocated memory is still 235.9MB. Free memory was 194.4MB in the beginning and 192.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 5843.85ms. Allocated memory is still 235.9MB. Free memory was 192.3MB in the beginning and 120.2MB in the end (delta: 72.1MB). Peak memory consumption was 73.1MB. 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: 12]: 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, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.8s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 55 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 54 mSDsluCounter, 237 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 148 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 76 IncrementalHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 89 mSDtfsCounter, 76 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=4, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 19 PreInvPairs, 32 NumberOfFragments, 65 HoareAnnotationTreeSize, 19 FomulaSimplifications, 131 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 59 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 317 SizeOfPredicates, 5 NumberOfNonLiveVariables, 326 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 11/18 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 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || x * 2 == y + y * y RESULT: Ultimate proved your program to be correct! [2022-04-28 01:21:33,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...