./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/egcd3-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 11:03:06,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 11:03:06,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 11:03:06,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 11:03:06,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 11:03:06,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 11:03:06,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 11:03:06,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 11:03:06,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 11:03:06,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 11:03:06,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 11:03:06,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 11:03:06,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 11:03:06,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 11:03:06,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 11:03:06,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 11:03:06,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 11:03:06,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 11:03:06,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 11:03:06,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 11:03:06,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 11:03:06,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 11:03:06,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 11:03:06,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 11:03:06,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 11:03:06,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 11:03:06,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 11:03:06,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 11:03:06,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 11:03:06,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 11:03:06,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 11:03:06,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 11:03:06,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 11:03:06,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 11:03:06,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 11:03:06,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 11:03:06,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 11:03:06,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 11:03:06,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 11:03:06,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 11:03:06,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 11:03:06,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 11:03:06,933 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 11:03:06,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 11:03:06,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 11:03:06,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 11:03:06,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 11:03:06,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 11:03:06,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 11:03:06,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 11:03:06,936 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 11:03:06,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 11:03:06,937 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 11:03:06,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 11:03:06,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 11:03:06,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 11:03:06,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 11:03:06,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 11:03:06,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 11:03:06,939 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 11:03:06,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 11:03:06,939 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 11:03:06,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 11:03:06,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 11:03:06,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 11:03:06,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 11:03:06,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:03:06,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 11:03:06,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 11:03:06,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 11:03:06,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 11:03:06,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 11:03:06,942 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 11:03:06,942 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 11:03:06,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 11:03:06,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 11:03:06,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2021-12-17 11:03:07,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 11:03:07,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 11:03:07,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 11:03:07,181 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 11:03:07,181 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 11:03:07,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2021-12-17 11:03:07,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47b330ab1/99ce031df676483bac06c86edfed3ea2/FLAG6af7cd7e2 [2021-12-17 11:03:07,616 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 11:03:07,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2021-12-17 11:03:07,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47b330ab1/99ce031df676483bac06c86edfed3ea2/FLAG6af7cd7e2 [2021-12-17 11:03:07,634 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47b330ab1/99ce031df676483bac06c86edfed3ea2 [2021-12-17 11:03:07,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 11:03:07,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 11:03:07,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 11:03:07,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 11:03:07,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 11:03:07,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:03:07" (1/1) ... [2021-12-17 11:03:07,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f084bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:07, skipping insertion in model container [2021-12-17 11:03:07,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:03:07" (1/1) ... [2021-12-17 11:03:07,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 11:03:07,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 11:03:07,862 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2021-12-17 11:03:07,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:03:07,893 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 11:03:07,901 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2021-12-17 11:03:07,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:03:07,918 INFO L208 MainTranslator]: Completed translation [2021-12-17 11:03:07,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:07 WrapperNode [2021-12-17 11:03:07,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 11:03:07,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 11:03:07,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 11:03:07,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 11:03:07,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:07" (1/1) ... [2021-12-17 11:03:07,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:07" (1/1) ... [2021-12-17 11:03:07,947 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2021-12-17 11:03:07,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 11:03:07,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 11:03:07,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 11:03:07,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 11:03:07,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:07" (1/1) ... [2021-12-17 11:03:07,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:07" (1/1) ... [2021-12-17 11:03:07,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:07" (1/1) ... [2021-12-17 11:03:07,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:07" (1/1) ... [2021-12-17 11:03:07,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:07" (1/1) ... [2021-12-17 11:03:07,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:07" (1/1) ... [2021-12-17 11:03:07,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:07" (1/1) ... [2021-12-17 11:03:07,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 11:03:07,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 11:03:07,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 11:03:07,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 11:03:07,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:07" (1/1) ... [2021-12-17 11:03:07,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:03:07,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:08,001 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) [2021-12-17 11:03:08,007 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 [2021-12-17 11:03:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 11:03:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 11:03:08,030 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 11:03:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 11:03:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 11:03:08,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 11:03:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 11:03:08,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 11:03:08,074 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 11:03:08,075 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 11:03:08,192 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 11:03:08,197 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 11:03:08,198 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 11:03:08,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:03:08 BoogieIcfgContainer [2021-12-17 11:03:08,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 11:03:08,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 11:03:08,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 11:03:08,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 11:03:08,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:03:07" (1/3) ... [2021-12-17 11:03:08,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c43881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:03:08, skipping insertion in model container [2021-12-17 11:03:08,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:07" (2/3) ... [2021-12-17 11:03:08,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c43881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:03:08, skipping insertion in model container [2021-12-17 11:03:08,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:03:08" (3/3) ... [2021-12-17 11:03:08,222 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2021-12-17 11:03:08,226 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 11:03:08,227 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 11:03:08,282 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 11:03:08,304 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 11:03:08,304 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 11:03:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 11:03:08,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 11:03:08,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:08,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:08,343 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:08,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:08,348 INFO L85 PathProgramCache]: Analyzing trace with hash -149497031, now seen corresponding path program 1 times [2021-12-17 11:03:08,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:08,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230339052] [2021-12-17 11:03:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:08,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:08,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 11:03:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:08,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 11:03:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:03:08,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:08,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230339052] [2021-12-17 11:03:08,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230339052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:03:08,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:03:08,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 11:03:08,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160156184] [2021-12-17 11:03:08,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:03:08,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 11:03:08,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:08,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 11:03:08,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:03:08,593 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 11:03:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:08,616 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2021-12-17 11:03:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 11:03:08,619 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-17 11:03:08,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:08,625 INFO L225 Difference]: With dead ends: 61 [2021-12-17 11:03:08,625 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 11:03:08,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:03:08,635 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:08,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:03:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 11:03:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-17 11:03:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 11:03:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-12-17 11:03:08,677 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2021-12-17 11:03:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:08,678 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-12-17 11:03:08,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 11:03:08,679 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-12-17 11:03:08,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 11:03:08,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:08,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:08,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 11:03:08,682 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:08,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:08,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2030119444, now seen corresponding path program 1 times [2021-12-17 11:03:08,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:08,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747425347] [2021-12-17 11:03:08,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:08,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:08,716 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:08,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123170413] [2021-12-17 11:03:08,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:08,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:08,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:08,727 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) [2021-12-17 11:03:08,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 11:03:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:08,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:03:08,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 11:03:08,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:03:08,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:08,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747425347] [2021-12-17 11:03:08,923 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:08,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123170413] [2021-12-17 11:03:08,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123170413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:03:08,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:03:08,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 11:03:08,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635876349] [2021-12-17 11:03:08,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:03:08,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 11:03:08,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:08,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 11:03:08,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:03:08,926 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:03:09,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:09,025 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2021-12-17 11:03:09,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:03:09,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-17 11:03:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:09,027 INFO L225 Difference]: With dead ends: 47 [2021-12-17 11:03:09,027 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 11:03:09,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:03:09,028 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:09,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 125 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:03:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 11:03:09,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-12-17 11:03:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 11:03:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-12-17 11:03:09,037 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2021-12-17 11:03:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:09,038 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-12-17 11:03:09,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:03:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-12-17 11:03:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 11:03:09,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:09,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:09,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:09,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:09,264 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:09,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:09,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1778657237, now seen corresponding path program 1 times [2021-12-17 11:03:09,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:09,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802537491] [2021-12-17 11:03:09,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:09,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:09,276 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:09,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915754914] [2021-12-17 11:03:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:09,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:09,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:09,278 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) [2021-12-17 11:03:09,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 11:03:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:09,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 11:03:09,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 11:03:09,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:03:09,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:09,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802537491] [2021-12-17 11:03:09,521 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:09,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915754914] [2021-12-17 11:03:09,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915754914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:03:09,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:03:09,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 11:03:09,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751398426] [2021-12-17 11:03:09,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:03:09,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 11:03:09,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:09,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 11:03:09,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:03:09,526 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:03:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:09,636 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2021-12-17 11:03:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 11:03:09,637 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-17 11:03:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:09,640 INFO L225 Difference]: With dead ends: 46 [2021-12-17 11:03:09,640 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 11:03:09,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:03:09,645 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 45 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:09,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 172 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:03:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 11:03:09,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-12-17 11:03:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 11:03:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2021-12-17 11:03:09,665 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2021-12-17 11:03:09,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:09,665 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2021-12-17 11:03:09,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:03:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2021-12-17 11:03:09,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 11:03:09,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:09,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:09,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:09,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-17 11:03:09,874 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:09,875 INFO L85 PathProgramCache]: Analyzing trace with hash 646289443, now seen corresponding path program 1 times [2021-12-17 11:03:09,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:09,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344782063] [2021-12-17 11:03:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:09,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:09,886 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:09,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948514193] [2021-12-17 11:03:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:09,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:09,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:09,890 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) [2021-12-17 11:03:09,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 11:03:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:09,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 11:03:09,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 11:03:10,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 11:03:10,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:10,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344782063] [2021-12-17 11:03:10,158 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:10,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948514193] [2021-12-17 11:03:10,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948514193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:03:10,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:03:10,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-17 11:03:10,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408380986] [2021-12-17 11:03:10,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:10,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 11:03:10,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:10,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 11:03:10,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:03:10,161 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 11:03:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:10,317 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2021-12-17 11:03:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 11:03:10,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-12-17 11:03:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:10,322 INFO L225 Difference]: With dead ends: 96 [2021-12-17 11:03:10,322 INFO L226 Difference]: Without dead ends: 89 [2021-12-17 11:03:10,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-17 11:03:10,326 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 60 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:10,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 208 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:03:10,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-17 11:03:10,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2021-12-17 11:03:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 11:03:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2021-12-17 11:03:10,350 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 24 [2021-12-17 11:03:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:10,352 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2021-12-17 11:03:10,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 11:03:10,353 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2021-12-17 11:03:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 11:03:10,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:10,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:10,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:10,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:10,564 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:10,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1194834104, now seen corresponding path program 1 times [2021-12-17 11:03:10,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:10,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320363222] [2021-12-17 11:03:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:10,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:10,584 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:10,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333062361] [2021-12-17 11:03:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:10,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:10,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:10,585 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) [2021-12-17 11:03:10,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 11:03:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:10,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 11:03:10,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 11:03:10,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:03:10,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:10,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320363222] [2021-12-17 11:03:10,746 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:10,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333062361] [2021-12-17 11:03:10,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333062361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:03:10,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:03:10,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 11:03:10,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544490621] [2021-12-17 11:03:10,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:03:10,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:03:10,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:10,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:03:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:03:10,748 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 11:03:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:10,852 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2021-12-17 11:03:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 11:03:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-12-17 11:03:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:10,855 INFO L225 Difference]: With dead ends: 72 [2021-12-17 11:03:10,855 INFO L226 Difference]: Without dead ends: 70 [2021-12-17 11:03:10,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:03:10,856 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:10,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 174 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:03:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-17 11:03:10,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-12-17 11:03:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 11:03:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2021-12-17 11:03:10,867 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 27 [2021-12-17 11:03:10,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:10,867 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2021-12-17 11:03:10,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 11:03:10,868 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2021-12-17 11:03:10,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 11:03:10,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:10,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:10,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:11,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:11,082 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:11,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1392040386, now seen corresponding path program 1 times [2021-12-17 11:03:11,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:11,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389846762] [2021-12-17 11:03:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:11,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:11,090 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:11,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998490412] [2021-12-17 11:03:11,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:11,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:11,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:11,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:03:11,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 11:03:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:11,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 11:03:11,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 11:03:11,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:03:11,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:11,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389846762] [2021-12-17 11:03:11,448 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:11,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998490412] [2021-12-17 11:03:11,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998490412] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:03:11,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:03:11,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2021-12-17 11:03:11,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982555153] [2021-12-17 11:03:11,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:11,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 11:03:11,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:11,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 11:03:11,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:03:11,450 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 11:03:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:11,622 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2021-12-17 11:03:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 11:03:11,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-12-17 11:03:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:11,624 INFO L225 Difference]: With dead ends: 104 [2021-12-17 11:03:11,624 INFO L226 Difference]: Without dead ends: 102 [2021-12-17 11:03:11,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-17 11:03:11,625 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:11,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 272 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:03:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-17 11:03:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2021-12-17 11:03:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 11:03:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2021-12-17 11:03:11,639 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 27 [2021-12-17 11:03:11,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:11,639 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2021-12-17 11:03:11,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 11:03:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2021-12-17 11:03:11,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 11:03:11,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:11,640 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:11,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:11,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:11,860 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:11,860 INFO L85 PathProgramCache]: Analyzing trace with hash -281586315, now seen corresponding path program 1 times [2021-12-17 11:03:11,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:11,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735539516] [2021-12-17 11:03:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:11,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:11,868 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:11,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291324969] [2021-12-17 11:03:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:11,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:11,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:11,870 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:03:11,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 11:03:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:11,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:03:11,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 11:03:11,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:03:11,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:11,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735539516] [2021-12-17 11:03:11,983 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:11,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291324969] [2021-12-17 11:03:11,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291324969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:03:11,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:03:11,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:03:11,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287712684] [2021-12-17 11:03:11,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:03:11,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:03:11,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:11,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:03:11,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:03:11,985 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 11:03:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:12,036 INFO L93 Difference]: Finished difference Result 144 states and 204 transitions. [2021-12-17 11:03:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:03:12,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-12-17 11:03:12,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:12,040 INFO L225 Difference]: With dead ends: 144 [2021-12-17 11:03:12,040 INFO L226 Difference]: Without dead ends: 142 [2021-12-17 11:03:12,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:03:12,042 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:12,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 115 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:03:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-17 11:03:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2021-12-17 11:03:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 43 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-17 11:03:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 196 transitions. [2021-12-17 11:03:12,085 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 196 transitions. Word has length 32 [2021-12-17 11:03:12,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:12,085 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 196 transitions. [2021-12-17 11:03:12,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 11:03:12,086 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 196 transitions. [2021-12-17 11:03:12,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 11:03:12,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:12,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:12,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:12,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:12,304 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:12,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:12,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278097, now seen corresponding path program 1 times [2021-12-17 11:03:12,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:12,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063883950] [2021-12-17 11:03:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:12,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:12,311 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:12,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217800054] [2021-12-17 11:03:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:12,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:12,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:12,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:03:12,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 11:03:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:12,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 11:03:12,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:03:12,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:12,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:12,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063883950] [2021-12-17 11:03:12,621 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:12,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217800054] [2021-12-17 11:03:12,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217800054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:03:12,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:03:12,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-17 11:03:12,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395738370] [2021-12-17 11:03:12,622 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:12,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 11:03:12,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:12,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 11:03:12,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:03:12,623 INFO L87 Difference]: Start difference. First operand 136 states and 196 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 11:03:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:12,757 INFO L93 Difference]: Finished difference Result 149 states and 207 transitions. [2021-12-17 11:03:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:03:12,758 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2021-12-17 11:03:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:12,759 INFO L225 Difference]: With dead ends: 149 [2021-12-17 11:03:12,760 INFO L226 Difference]: Without dead ends: 147 [2021-12-17 11:03:12,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:03:12,761 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 27 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:12,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 212 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:03:12,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-17 11:03:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-12-17 11:03:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 93 states have internal predecessors, (117), 43 states have call successors, (43), 8 states have call predecessors, (43), 8 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-17 11:03:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 202 transitions. [2021-12-17 11:03:12,776 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 202 transitions. Word has length 32 [2021-12-17 11:03:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:12,776 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 202 transitions. [2021-12-17 11:03:12,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 11:03:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 202 transitions. [2021-12-17 11:03:12,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 11:03:12,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:12,777 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:12,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:12,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:13,000 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:13,000 INFO L85 PathProgramCache]: Analyzing trace with hash 492814709, now seen corresponding path program 2 times [2021-12-17 11:03:13,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:13,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978687265] [2021-12-17 11:03:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:13,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:13,007 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:13,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002946585] [2021-12-17 11:03:13,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:03:13,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:13,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:13,009 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:03:13,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 11:03:13,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:03:13,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:03:13,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 11:03:13,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:03:13,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:03:13,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:13,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978687265] [2021-12-17 11:03:13,120 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:13,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002946585] [2021-12-17 11:03:13,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002946585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:03:13,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:03:13,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:03:13,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783149604] [2021-12-17 11:03:13,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:03:13,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:03:13,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:13,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:03:13,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:03:13,122 INFO L87 Difference]: Start difference. First operand 144 states and 202 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:03:13,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:13,182 INFO L93 Difference]: Finished difference Result 183 states and 254 transitions. [2021-12-17 11:03:13,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:03:13,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-12-17 11:03:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:13,183 INFO L225 Difference]: With dead ends: 183 [2021-12-17 11:03:13,184 INFO L226 Difference]: Without dead ends: 127 [2021-12-17 11:03:13,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 11:03:13,185 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 18 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:13,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 144 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:03:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-17 11:03:13,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2021-12-17 11:03:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 76 states have internal predecessors, (91), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-17 11:03:13,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2021-12-17 11:03:13,197 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 32 [2021-12-17 11:03:13,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:13,197 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2021-12-17 11:03:13,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:03:13,197 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2021-12-17 11:03:13,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 11:03:13,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:13,198 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:13,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:13,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-17 11:03:13,412 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:13,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:13,412 INFO L85 PathProgramCache]: Analyzing trace with hash -449167720, now seen corresponding path program 1 times [2021-12-17 11:03:13,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:13,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902460965] [2021-12-17 11:03:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:13,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:13,418 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:13,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576064183] [2021-12-17 11:03:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:13,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:13,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:13,420 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:03:13,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 11:03:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:03:13,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 11:03:13,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:03:13,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:13,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902460965] [2021-12-17 11:03:13,549 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:13,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576064183] [2021-12-17 11:03:13,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576064183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:03:13,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:03:13,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:03:13,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150342588] [2021-12-17 11:03:13,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:03:13,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:03:13,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:13,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:03:13,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:03:13,552 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 11:03:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:13,603 INFO L93 Difference]: Finished difference Result 187 states and 271 transitions. [2021-12-17 11:03:13,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:03:13,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-12-17 11:03:13,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:13,607 INFO L225 Difference]: With dead ends: 187 [2021-12-17 11:03:13,607 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 11:03:13,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:03:13,609 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:13,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 126 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:03:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 11:03:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 163. [2021-12-17 11:03:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 86 states have (on average 1.186046511627907) internal successors, (102), 95 states have internal predecessors, (102), 67 states have call successors, (67), 9 states have call predecessors, (67), 9 states have return successors, (66), 58 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-17 11:03:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 235 transitions. [2021-12-17 11:03:13,641 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 235 transitions. Word has length 37 [2021-12-17 11:03:13,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:13,641 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 235 transitions. [2021-12-17 11:03:13,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 11:03:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 235 transitions. [2021-12-17 11:03:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 11:03:13,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:13,644 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:13,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:13,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 11:03:13,859 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:13,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1289603446, now seen corresponding path program 1 times [2021-12-17 11:03:13,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:13,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76180825] [2021-12-17 11:03:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:13,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:13,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:13,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063954862] [2021-12-17 11:03:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:13,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:13,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:13,873 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:03:13,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 11:03:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-17 11:03:13,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 11:03:14,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 11:03:15,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:15,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76180825] [2021-12-17 11:03:15,193 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:15,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063954862] [2021-12-17 11:03:15,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063954862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:03:15,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:03:15,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-12-17 11:03:15,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725431169] [2021-12-17 11:03:15,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:15,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 11:03:15,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:15,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 11:03:15,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-17 11:03:15,195 INFO L87 Difference]: Start difference. First operand 163 states and 235 transitions. Second operand has 21 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-17 11:03:20,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:03:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:23,628 INFO L93 Difference]: Finished difference Result 301 states and 449 transitions. [2021-12-17 11:03:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 11:03:23,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 49 [2021-12-17 11:03:23,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:23,632 INFO L225 Difference]: With dead ends: 301 [2021-12-17 11:03:23,632 INFO L226 Difference]: Without dead ends: 297 [2021-12-17 11:03:23,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 11:03:23,633 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 122 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:23,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 405 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2021-12-17 11:03:23,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-17 11:03:23,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 245. [2021-12-17 11:03:23,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 148 states have internal predecessors, (172), 91 states have call successors, (91), 12 states have call predecessors, (91), 12 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2021-12-17 11:03:23,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 353 transitions. [2021-12-17 11:03:23,674 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 353 transitions. Word has length 49 [2021-12-17 11:03:23,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:23,674 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 353 transitions. [2021-12-17 11:03:23,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-17 11:03:23,675 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 353 transitions. [2021-12-17 11:03:23,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 11:03:23,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:23,676 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:23,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:23,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 11:03:23,891 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash 982010905, now seen corresponding path program 1 times [2021-12-17 11:03:23,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:23,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666907852] [2021-12-17 11:03:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:23,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:23,899 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:23,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929971202] [2021-12-17 11:03:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:23,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:23,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:23,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:03:23,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 11:03:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:23,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 11:03:23,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-17 11:03:24,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 11:03:24,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:24,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666907852] [2021-12-17 11:03:24,378 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:24,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929971202] [2021-12-17 11:03:24,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929971202] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:03:24,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:03:24,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 15 [2021-12-17 11:03:24,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689205571] [2021-12-17 11:03:24,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:24,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 11:03:24,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:24,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 11:03:24,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-17 11:03:24,381 INFO L87 Difference]: Start difference. First operand 245 states and 353 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-17 11:03:24,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:24,764 INFO L93 Difference]: Finished difference Result 287 states and 415 transitions. [2021-12-17 11:03:24,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 11:03:24,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 59 [2021-12-17 11:03:24,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:24,769 INFO L225 Difference]: With dead ends: 287 [2021-12-17 11:03:24,769 INFO L226 Difference]: Without dead ends: 285 [2021-12-17 11:03:24,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-12-17 11:03:24,771 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:24,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 241 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 11:03:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-17 11:03:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 249. [2021-12-17 11:03:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 144 states have (on average 1.2152777777777777) internal successors, (175), 151 states have internal predecessors, (175), 91 states have call successors, (91), 13 states have call predecessors, (91), 13 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2021-12-17 11:03:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 356 transitions. [2021-12-17 11:03:24,812 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 356 transitions. Word has length 59 [2021-12-17 11:03:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:24,812 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 356 transitions. [2021-12-17 11:03:24,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-17 11:03:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 356 transitions. [2021-12-17 11:03:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 11:03:24,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:24,819 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:24,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:25,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 11:03:25,040 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:25,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:25,040 INFO L85 PathProgramCache]: Analyzing trace with hash -70799180, now seen corresponding path program 1 times [2021-12-17 11:03:25,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:25,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226426785] [2021-12-17 11:03:25,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:25,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:25,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:25,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129269711] [2021-12-17 11:03:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:25,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:25,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:25,057 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:03:25,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 11:03:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:25,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 11:03:25,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 11:03:25,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 11:03:25,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:25,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226426785] [2021-12-17 11:03:25,350 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:25,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129269711] [2021-12-17 11:03:25,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129269711] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:03:25,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:03:25,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-17 11:03:25,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895431947] [2021-12-17 11:03:25,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:25,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 11:03:25,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:25,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 11:03:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:03:25,352 INFO L87 Difference]: Start difference. First operand 249 states and 356 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 11:03:25,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:25,530 INFO L93 Difference]: Finished difference Result 263 states and 367 transitions. [2021-12-17 11:03:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 11:03:25,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2021-12-17 11:03:25,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:25,532 INFO L225 Difference]: With dead ends: 263 [2021-12-17 11:03:25,533 INFO L226 Difference]: Without dead ends: 261 [2021-12-17 11:03:25,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-17 11:03:25,533 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:25,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 152 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:03:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-17 11:03:25,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2021-12-17 11:03:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 153 states have (on average 1.2026143790849673) internal successors, (184), 160 states have internal predecessors, (184), 91 states have call successors, (91), 16 states have call predecessors, (91), 16 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2021-12-17 11:03:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 365 transitions. [2021-12-17 11:03:25,581 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 365 transitions. Word has length 57 [2021-12-17 11:03:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:25,582 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 365 transitions. [2021-12-17 11:03:25,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 11:03:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 365 transitions. [2021-12-17 11:03:25,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 11:03:25,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:25,584 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:25,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:25,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 11:03:25,807 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:25,808 INFO L85 PathProgramCache]: Analyzing trace with hash 513336511, now seen corresponding path program 2 times [2021-12-17 11:03:25,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:25,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876583076] [2021-12-17 11:03:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:25,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:25,815 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:25,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851785606] [2021-12-17 11:03:25,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:03:25,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:25,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:25,816 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:03:25,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 11:03:25,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:03:25,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:03:25,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 11:03:25,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 11:03:25,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:03:25,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:25,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876583076] [2021-12-17 11:03:25,952 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:25,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851785606] [2021-12-17 11:03:25,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851785606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:03:25,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:03:25,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:03:25,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356299755] [2021-12-17 11:03:25,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:03:25,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:03:25,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:25,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:03:25,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:03:25,956 INFO L87 Difference]: Start difference. First operand 261 states and 365 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 11:03:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:26,024 INFO L93 Difference]: Finished difference Result 453 states and 630 transitions. [2021-12-17 11:03:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:03:26,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2021-12-17 11:03:26,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:26,026 INFO L225 Difference]: With dead ends: 453 [2021-12-17 11:03:26,026 INFO L226 Difference]: Without dead ends: 272 [2021-12-17 11:03:26,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:03:26,028 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:26,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 88 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:03:26,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-17 11:03:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 252. [2021-12-17 11:03:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 153 states have internal predecessors, (182), 83 states have call successors, (83), 16 states have call predecessors, (83), 16 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2021-12-17 11:03:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 347 transitions. [2021-12-17 11:03:26,074 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 347 transitions. Word has length 62 [2021-12-17 11:03:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:26,074 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 347 transitions. [2021-12-17 11:03:26,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 11:03:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 347 transitions. [2021-12-17 11:03:26,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 11:03:26,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:26,076 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:26,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:26,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 11:03:26,291 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:26,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:26,292 INFO L85 PathProgramCache]: Analyzing trace with hash -420355271, now seen corresponding path program 3 times [2021-12-17 11:03:26,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:26,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651827549] [2021-12-17 11:03:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:26,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:26,299 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:26,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459552939] [2021-12-17 11:03:26,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:03:26,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:26,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:26,308 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:03:26,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 11:03:26,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 11:03:26,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:03:26,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-17 11:03:26,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 11:03:27,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 11:03:29,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:29,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651827549] [2021-12-17 11:03:29,519 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:29,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459552939] [2021-12-17 11:03:29,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459552939] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:03:29,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:03:29,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2021-12-17 11:03:29,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903696100] [2021-12-17 11:03:29,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:29,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 11:03:29,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:29,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 11:03:29,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-12-17 11:03:29,521 INFO L87 Difference]: Start difference. First operand 252 states and 347 transitions. Second operand has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-12-17 11:03:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:59,880 INFO L93 Difference]: Finished difference Result 347 states and 466 transitions. [2021-12-17 11:03:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 11:03:59,882 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 62 [2021-12-17 11:03:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:59,884 INFO L225 Difference]: With dead ends: 347 [2021-12-17 11:03:59,884 INFO L226 Difference]: Without dead ends: 345 [2021-12-17 11:03:59,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=749, Invalid=3033, Unknown=0, NotChecked=0, Total=3782 [2021-12-17 11:03:59,886 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 235 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:59,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 652 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2021-12-17 11:03:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-17 11:03:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 280. [2021-12-17 11:03:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 173 states have (on average 1.1734104046242775) internal successors, (203), 175 states have internal predecessors, (203), 85 states have call successors, (85), 21 states have call predecessors, (85), 21 states have return successors, (84), 83 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-17 11:03:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 372 transitions. [2021-12-17 11:03:59,940 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 372 transitions. Word has length 62 [2021-12-17 11:03:59,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:59,941 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 372 transitions. [2021-12-17 11:03:59,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-12-17 11:03:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 372 transitions. [2021-12-17 11:03:59,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-17 11:03:59,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:59,942 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:59,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 11:04:00,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:04:00,143 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:04:00,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:04:00,144 INFO L85 PathProgramCache]: Analyzing trace with hash -819166674, now seen corresponding path program 1 times [2021-12-17 11:04:00,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:04:00,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60432097] [2021-12-17 11:04:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:04:00,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:04:00,151 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:04:00,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949813695] [2021-12-17 11:04:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:04:00,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:04:00,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:04:00,153 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:04:00,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 11:04:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:04:00,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-17 11:04:00,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:04:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 11:04:01,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:04:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-17 11:04:02,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:04:02,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60432097] [2021-12-17 11:04:02,392 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:04:02,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949813695] [2021-12-17 11:04:02,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949813695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:04:02,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:04:02,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-12-17 11:04:02,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136955170] [2021-12-17 11:04:02,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:04:02,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 11:04:02,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:04:02,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 11:04:02,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-12-17 11:04:02,394 INFO L87 Difference]: Start difference. First operand 280 states and 372 transitions. Second operand has 26 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-17 11:04:06,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:09,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:12,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:16,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:22,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:27,707 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:29,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:32,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:36,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:39,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:41,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:44,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:46,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:47,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:47,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:04:47,552 INFO L93 Difference]: Finished difference Result 470 states and 649 transitions. [2021-12-17 11:04:47,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-17 11:04:47,556 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 76 [2021-12-17 11:04:47,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:04:47,558 INFO L225 Difference]: With dead ends: 470 [2021-12-17 11:04:47,559 INFO L226 Difference]: Without dead ends: 466 [2021-12-17 11:04:47,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 129 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=883, Invalid=3809, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 11:04:47,561 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 183 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 469 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.5s IncrementalHoareTripleChecker+Time [2021-12-17 11:04:47,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 568 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1271 Invalid, 10 Unknown, 0 Unchecked, 38.5s Time] [2021-12-17 11:04:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-12-17 11:04:47,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 408. [2021-12-17 11:04:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 243 states have (on average 1.1975308641975309) internal successors, (291), 245 states have internal predecessors, (291), 137 states have call successors, (137), 27 states have call predecessors, (137), 27 states have return successors, (136), 135 states have call predecessors, (136), 136 states have call successors, (136) [2021-12-17 11:04:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 564 transitions. [2021-12-17 11:04:47,656 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 564 transitions. Word has length 76 [2021-12-17 11:04:47,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:04:47,656 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 564 transitions. [2021-12-17 11:04:47,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-17 11:04:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 564 transitions. [2021-12-17 11:04:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 11:04:47,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:04:47,658 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:04:47,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 11:04:47,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 11:04:47,880 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:04:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:04:47,880 INFO L85 PathProgramCache]: Analyzing trace with hash 685229769, now seen corresponding path program 1 times [2021-12-17 11:04:47,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:04:47,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585557568] [2021-12-17 11:04:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:04:47,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:04:47,888 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:04:47,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22244963] [2021-12-17 11:04:47,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:04:47,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:04:47,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:04:47,893 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:04:47,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 11:04:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:04:47,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 11:04:47,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:04:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 46 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-17 11:04:48,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:04:48,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:04:48,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585557568] [2021-12-17 11:04:48,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:04:48,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22244963] [2021-12-17 11:04:48,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22244963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:04:48,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:04:48,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-17 11:04:48,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769089039] [2021-12-17 11:04:48,748 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:04:48,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 11:04:48,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:04:48,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 11:04:48,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-12-17 11:04:48,749 INFO L87 Difference]: Start difference. First operand 408 states and 564 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 11:04:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:04:49,108 INFO L93 Difference]: Finished difference Result 447 states and 617 transitions. [2021-12-17 11:04:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 11:04:49,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2021-12-17 11:04:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:04:49,111 INFO L225 Difference]: With dead ends: 447 [2021-12-17 11:04:49,111 INFO L226 Difference]: Without dead ends: 445 [2021-12-17 11:04:49,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-12-17 11:04:49,112 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 47 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 11:04:49,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 195 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 11:04:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-17 11:04:49,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 437. [2021-12-17 11:04:49,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 258 states have (on average 1.2015503875968991) internal successors, (310), 260 states have internal predecessors, (310), 149 states have call successors, (149), 29 states have call predecessors, (149), 29 states have return successors, (148), 147 states have call predecessors, (148), 148 states have call successors, (148) [2021-12-17 11:04:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 607 transitions. [2021-12-17 11:04:49,208 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 607 transitions. Word has length 79 [2021-12-17 11:04:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:04:49,208 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 607 transitions. [2021-12-17 11:04:49,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 11:04:49,209 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 607 transitions. [2021-12-17 11:04:49,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 11:04:49,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:04:49,210 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:04:49,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-17 11:04:49,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 11:04:49,432 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:04:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:04:49,432 INFO L85 PathProgramCache]: Analyzing trace with hash -717331702, now seen corresponding path program 2 times [2021-12-17 11:04:49,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:04:49,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740155557] [2021-12-17 11:04:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:04:49,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:04:49,441 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:04:49,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963133632] [2021-12-17 11:04:49,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:04:49,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:04:49,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:04:49,443 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:04:49,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 11:04:49,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:04:49,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:04:49,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 11:04:49,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:04:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2021-12-17 11:04:49,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:04:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2021-12-17 11:04:50,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:04:50,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740155557] [2021-12-17 11:04:50,853 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:04:50,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963133632] [2021-12-17 11:04:50,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963133632] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:04:50,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:04:50,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-12-17 11:04:50,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474951308] [2021-12-17 11:04:50,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:04:50,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 11:04:50,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:04:50,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 11:04:50,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-12-17 11:04:50,855 INFO L87 Difference]: Start difference. First operand 437 states and 607 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-17 11:04:53,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:04:53,817 INFO L93 Difference]: Finished difference Result 1159 states and 1808 transitions. [2021-12-17 11:04:53,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 11:04:53,818 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 101 [2021-12-17 11:04:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:04:53,828 INFO L225 Difference]: With dead ends: 1159 [2021-12-17 11:04:53,828 INFO L226 Difference]: Without dead ends: 1157 [2021-12-17 11:04:53,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 11:04:53,830 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 91 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 11:04:53,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 508 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 581 Invalid, 0 Unknown, 64 Unchecked, 1.8s Time] [2021-12-17 11:04:53,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-12-17 11:04:54,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1051. [2021-12-17 11:04:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 503 states have (on average 1.31610337972167) internal successors, (662), 505 states have internal predecessors, (662), 513 states have call successors, (513), 34 states have call predecessors, (513), 34 states have return successors, (512), 511 states have call predecessors, (512), 512 states have call successors, (512) [2021-12-17 11:04:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1687 transitions. [2021-12-17 11:04:54,119 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1687 transitions. Word has length 101 [2021-12-17 11:04:54,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:04:54,120 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1687 transitions. [2021-12-17 11:04:54,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-17 11:04:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1687 transitions. [2021-12-17 11:04:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-17 11:04:54,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:04:54,122 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:04:54,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 11:04:54,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 11:04:54,336 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:04:54,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:04:54,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1799915666, now seen corresponding path program 1 times [2021-12-17 11:04:54,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:04:54,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108433828] [2021-12-17 11:04:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:04:54,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:04:54,345 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:04:54,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105182319] [2021-12-17 11:04:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:04:54,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:04:54,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:04:54,347 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:04:54,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 11:04:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:04:54,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-17 11:04:54,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:04:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 134 proven. 63 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-17 11:04:56,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:05:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-17 11:05:03,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:05:03,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108433828] [2021-12-17 11:05:03,417 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:05:03,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105182319] [2021-12-17 11:05:03,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105182319] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:05:03,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:05:03,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2021-12-17 11:05:03,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777880439] [2021-12-17 11:05:03,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:05:03,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 11:05:03,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:05:03,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 11:05:03,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-12-17 11:05:03,419 INFO L87 Difference]: Start difference. First operand 1051 states and 1687 transitions. Second operand has 32 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 13 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 14 states have call predecessors, (30), 11 states have call successors, (30) [2021-12-17 11:05:12,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:05:14,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:05:27,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:05:29,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:05:36,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:05:38,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:05:43,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:05:45,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:05:50,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:05:52,372 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:06:01,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:06:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:06:04,523 INFO L93 Difference]: Finished difference Result 1635 states and 2573 transitions. [2021-12-17 11:06:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 11:06:04,524 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 13 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 14 states have call predecessors, (30), 11 states have call successors, (30) Word has length 104 [2021-12-17 11:06:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:06:04,531 INFO L225 Difference]: With dead ends: 1635 [2021-12-17 11:06:04,532 INFO L226 Difference]: Without dead ends: 1336 [2021-12-17 11:06:04,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 179 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=662, Invalid=2094, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 11:06:04,535 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 159 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 334 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.5s IncrementalHoareTripleChecker+Time [2021-12-17 11:06:04,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 479 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 1023 Invalid, 9 Unknown, 0 Unchecked, 36.5s Time] [2021-12-17 11:06:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-12-17 11:06:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1321. [2021-12-17 11:06:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 647 states have (on average 1.295208655332303) internal successors, (838), 661 states have internal predecessors, (838), 629 states have call successors, (629), 44 states have call predecessors, (629), 44 states have return successors, (628), 615 states have call predecessors, (628), 628 states have call successors, (628) [2021-12-17 11:06:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 2095 transitions. [2021-12-17 11:06:05,071 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 2095 transitions. Word has length 104 [2021-12-17 11:06:05,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:06:05,071 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 2095 transitions. [2021-12-17 11:06:05,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 13 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 14 states have call predecessors, (30), 11 states have call successors, (30) [2021-12-17 11:06:05,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 2095 transitions. [2021-12-17 11:06:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-17 11:06:05,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:06:05,074 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:06:05,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-17 11:06:05,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:06:05,296 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:06:05,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:06:05,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1865302579, now seen corresponding path program 2 times [2021-12-17 11:06:05,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:06:05,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322195328] [2021-12-17 11:06:05,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:06:05,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:06:05,318 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:06:05,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022292574] [2021-12-17 11:06:05,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:06:05,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:06:05,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:06:05,329 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:06:05,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 11:06:05,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:06:05,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:06:05,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-17 11:06:05,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:06:20,284 WARN L227 SmtUtils]: Spent 6.74s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:06:45,756 WARN L227 SmtUtils]: Spent 5.33s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:07:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 91 proven. 91 refuted. 7 times theorem prover too weak. 208 trivial. 0 not checked. [2021-12-17 11:07:11,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:07:27,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:07:27,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322195328] [2021-12-17 11:07:27,160 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:07:27,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022292574] [2021-12-17 11:07:27,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022292574] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:07:27,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:07:27,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-17 11:07:27,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808433395] [2021-12-17 11:07:27,161 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:07:27,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 11:07:27,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:07:27,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 11:07:27,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=685, Unknown=9, NotChecked=0, Total=812 [2021-12-17 11:07:27,162 INFO L87 Difference]: Start difference. First operand 1321 states and 2095 transitions. Second operand has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-17 11:07:29,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:07:29,655 INFO L93 Difference]: Finished difference Result 1399 states and 2197 transitions. [2021-12-17 11:07:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 11:07:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 109 [2021-12-17 11:07:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:07:29,664 INFO L225 Difference]: With dead ends: 1399 [2021-12-17 11:07:29,664 INFO L226 Difference]: Without dead ends: 1397 [2021-12-17 11:07:29,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=200, Invalid=1197, Unknown=9, NotChecked=0, Total=1406 [2021-12-17 11:07:29,666 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 64 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 11:07:29,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 579 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 810 Invalid, 0 Unknown, 111 Unchecked, 1.4s Time] [2021-12-17 11:07:29,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-12-17 11:07:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1366. [2021-12-17 11:07:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 669 states have (on average 1.2944693572496264) internal successors, (866), 683 states have internal predecessors, (866), 649 states have call successors, (649), 47 states have call predecessors, (649), 47 states have return successors, (648), 635 states have call predecessors, (648), 648 states have call successors, (648) [2021-12-17 11:07:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 2163 transitions. [2021-12-17 11:07:30,125 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 2163 transitions. Word has length 109 [2021-12-17 11:07:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:07:30,126 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 2163 transitions. [2021-12-17 11:07:30,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-17 11:07:30,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 2163 transitions. [2021-12-17 11:07:30,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-17 11:07:30,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:07:30,129 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:07:30,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-17 11:07:30,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:07:30,343 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:07:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:07:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1241356120, now seen corresponding path program 2 times [2021-12-17 11:07:30,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:07:30,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761354606] [2021-12-17 11:07:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:07:30,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:07:30,356 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:07:30,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618058699] [2021-12-17 11:07:30,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:07:30,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:07:30,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:07:30,358 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:07:30,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 11:07:30,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:07:30,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:07:30,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 122 conjunts are in the unsatisfiable core [2021-12-17 11:07:30,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:07:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 124 proven. 163 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-12-17 11:07:32,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:07:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 201 proven. 23 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-12-17 11:07:46,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:07:46,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761354606] [2021-12-17 11:07:46,465 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:07:46,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618058699] [2021-12-17 11:07:46,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618058699] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:07:46,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:07:46,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 31 [2021-12-17 11:07:46,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807308954] [2021-12-17 11:07:46,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:07:46,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 11:07:46,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:07:46,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 11:07:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=758, Unknown=2, NotChecked=0, Total=930 [2021-12-17 11:07:46,467 INFO L87 Difference]: Start difference. First operand 1366 states and 2163 transitions. Second operand has 31 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 28 states have internal predecessors, (69), 13 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2021-12-17 11:07:50,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:07:56,484 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:08:00,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:08:02,824 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:08:05,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:08:10,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:08:50,242 WARN L227 SmtUtils]: Spent 37.14s on a formula simplification. DAG size of input: 70 DAG size of output: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:08:51,747 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:08,929 WARN L227 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 75 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:09:10,937 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:16,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:18,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:20,599 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:23,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:33,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:36,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:41,637 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:09:42,090 INFO L93 Difference]: Finished difference Result 1492 states and 2329 transitions. [2021-12-17 11:09:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-17 11:09:42,091 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 28 states have internal predecessors, (69), 13 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) Word has length 126 [2021-12-17 11:09:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:09:42,099 INFO L225 Difference]: With dead ends: 1492 [2021-12-17 11:09:42,099 INFO L226 Difference]: Without dead ends: 1484 [2021-12-17 11:09:42,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 210 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 79.2s TimeCoverageRelationStatistics Valid=889, Invalid=3528, Unknown=5, NotChecked=0, Total=4422 [2021-12-17 11:09:42,101 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 148 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 337 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.4s IncrementalHoareTripleChecker+Time [2021-12-17 11:09:42,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 567 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 1175 Invalid, 11 Unknown, 0 Unchecked, 43.4s Time] [2021-12-17 11:09:42,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-12-17 11:09:42,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1342. [2021-12-17 11:09:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 662 states have (on average 1.2870090634441087) internal successors, (852), 677 states have internal predecessors, (852), 630 states have call successors, (630), 49 states have call predecessors, (630), 49 states have return successors, (629), 615 states have call predecessors, (629), 629 states have call successors, (629) [2021-12-17 11:09:42,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 2111 transitions. [2021-12-17 11:09:42,593 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 2111 transitions. Word has length 126 [2021-12-17 11:09:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:09:42,594 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 2111 transitions. [2021-12-17 11:09:42,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 28 states have internal predecessors, (69), 13 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2021-12-17 11:09:42,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 2111 transitions. [2021-12-17 11:09:42,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 11:09:42,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:09:42,598 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:09:42,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-17 11:09:42,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-17 11:09:42,811 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:09:42,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:09:42,812 INFO L85 PathProgramCache]: Analyzing trace with hash -798296434, now seen corresponding path program 3 times [2021-12-17 11:09:42,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:09:42,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609404316] [2021-12-17 11:09:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:09:42,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:09:42,828 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:09:42,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029053274] [2021-12-17 11:09:42,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:09:42,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:09:42,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:09:42,830 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:09:42,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 11:09:42,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 11:09:42,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:09:42,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-17 11:09:42,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:10:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 134 proven. 60 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2021-12-17 11:10:38,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:10:46,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:10:46,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609404316] [2021-12-17 11:10:46,207 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:10:46,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029053274] [2021-12-17 11:10:46,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029053274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:10:46,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:10:46,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-17 11:10:46,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15514228] [2021-12-17 11:10:46,208 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:10:46,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 11:10:46,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:10:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 11:10:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-12-17 11:10:46,209 INFO L87 Difference]: Start difference. First operand 1342 states and 2111 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-17 11:11:08,029 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:11,830 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:11:12,190 INFO L93 Difference]: Finished difference Result 1600 states and 2521 transitions. [2021-12-17 11:11:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 11:11:12,192 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 131 [2021-12-17 11:11:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:11:12,200 INFO L225 Difference]: With dead ends: 1600 [2021-12-17 11:11:12,201 INFO L226 Difference]: Without dead ends: 1598 [2021-12-17 11:11:12,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=303, Invalid=1337, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 11:11:12,203 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 87 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 93 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-12-17 11:11:12,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 447 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 880 Invalid, 2 Unknown, 25 Unchecked, 7.6s Time] [2021-12-17 11:11:12,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2021-12-17 11:11:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1527. [2021-12-17 11:11:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 745 states have (on average 1.2966442953020134) internal successors, (966), 760 states have internal predecessors, (966), 730 states have call successors, (730), 52 states have call predecessors, (730), 51 states have return successors, (729), 714 states have call predecessors, (729), 729 states have call successors, (729) [2021-12-17 11:11:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2425 transitions. [2021-12-17 11:11:12,781 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2425 transitions. Word has length 131 [2021-12-17 11:11:12,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:11:12,781 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 2425 transitions. [2021-12-17 11:11:12,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-17 11:11:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2425 transitions. [2021-12-17 11:11:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 11:11:12,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:11:12,785 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:11:12,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-17 11:11:12,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-17 11:11:12,999 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:11:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:11:13,000 INFO L85 PathProgramCache]: Analyzing trace with hash 802828878, now seen corresponding path program 4 times [2021-12-17 11:11:13,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:11:13,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052249123] [2021-12-17 11:11:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:11:13,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:11:13,007 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:11:13,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751067375] [2021-12-17 11:11:13,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 11:11:13,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:11:13,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:11:13,014 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:11:13,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 11:11:13,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 11:11:13,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:11:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-17 11:11:13,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:11:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 167 proven. 126 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2021-12-17 11:11:28,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:11:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 199 proven. 27 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-12-17 11:11:49,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:11:49,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052249123] [2021-12-17 11:11:49,362 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:11:49,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751067375] [2021-12-17 11:11:49,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751067375] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:11:49,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:11:49,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 39 [2021-12-17 11:11:49,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597830499] [2021-12-17 11:11:49,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:11:49,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 11:11:49,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:11:49,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 11:11:49,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1231, Unknown=2, NotChecked=0, Total=1482 [2021-12-17 11:11:49,364 INFO L87 Difference]: Start difference. First operand 1527 states and 2425 transitions. Second operand has 39 states, 35 states have (on average 2.2) internal successors, (77), 31 states have internal predecessors, (77), 16 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 12 states have call predecessors, (34), 14 states have call successors, (34) [2021-12-17 11:11:52,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:54,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:12:03,696 WARN L227 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 65 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:12:09,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:12:16,936 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:12:23,953 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:12:43,302 WARN L227 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 60 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:12:57,629 WARN L227 SmtUtils]: Spent 12.49s on a formula simplification. DAG size of input: 88 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:13:01,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:13:14,398 WARN L227 SmtUtils]: Spent 7.98s on a formula simplification. DAG size of input: 72 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:13:17,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:13:23,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:13:26,750 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:13:29,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:13:31,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:13:44,938 WARN L227 SmtUtils]: Spent 9.97s on a formula simplification. DAG size of input: 95 DAG size of output: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:13:53,387 WARN L227 SmtUtils]: Spent 7.85s on a formula simplification. DAG size of input: 68 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:14:07,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:14:09,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:14:11,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:14:21,670 WARN L227 SmtUtils]: Spent 9.63s on a formula simplification. DAG size of input: 71 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:14:25,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:14:32,878 WARN L227 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 76 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:14:35,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:14:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:14:42,115 INFO L93 Difference]: Finished difference Result 2139 states and 3398 transitions. [2021-12-17 11:14:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-17 11:14:42,116 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 35 states have (on average 2.2) internal successors, (77), 31 states have internal predecessors, (77), 16 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 12 states have call predecessors, (34), 14 states have call successors, (34) Word has length 131 [2021-12-17 11:14:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:14:42,125 INFO L225 Difference]: With dead ends: 2139 [2021-12-17 11:14:42,125 INFO L226 Difference]: Without dead ends: 2137 [2021-12-17 11:14:42,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 217 SyntacticMatches, 8 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 127.9s TimeCoverageRelationStatistics Valid=1455, Invalid=6024, Unknown=3, NotChecked=0, Total=7482 [2021-12-17 11:14:42,128 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 284 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 750 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 3330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 56.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:14:42,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 859 Invalid, 3330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 2532 Invalid, 13 Unknown, 35 Unchecked, 56.1s Time] [2021-12-17 11:14:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-12-17 11:14:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1886. [2021-12-17 11:14:42,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 947 states have (on average 1.3020063357972544) internal successors, (1233), 967 states have internal predecessors, (1233), 884 states have call successors, (884), 55 states have call predecessors, (884), 54 states have return successors, (883), 863 states have call predecessors, (883), 883 states have call successors, (883) [2021-12-17 11:14:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3000 transitions. [2021-12-17 11:14:42,865 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3000 transitions. Word has length 131 [2021-12-17 11:14:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:14:42,865 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 3000 transitions. [2021-12-17 11:14:42,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 35 states have (on average 2.2) internal successors, (77), 31 states have internal predecessors, (77), 16 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 12 states have call predecessors, (34), 14 states have call successors, (34) [2021-12-17 11:14:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3000 transitions. [2021-12-17 11:14:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-17 11:14:42,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:14:42,871 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:14:42,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-17 11:14:43,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:14:43,088 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:14:43,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:14:43,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1866452666, now seen corresponding path program 5 times [2021-12-17 11:14:43,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:14:43,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879781735] [2021-12-17 11:14:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:14:43,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:14:43,096 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:14:43,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547397110] [2021-12-17 11:14:43,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 11:14:43,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:14:43,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:14:43,098 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:14:43,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 11:14:43,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-17 11:14:43,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:14:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-17 11:14:43,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:14:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 68 proven. 155 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-12-17 11:14:46,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:14:57,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:14:57,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879781735] [2021-12-17 11:14:57,078 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:14:57,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547397110] [2021-12-17 11:14:57,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547397110] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:14:57,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:14:57,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-12-17 11:14:57,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605832264] [2021-12-17 11:14:57,079 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:14:57,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 11:14:57,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:14:57,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 11:14:57,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 11:14:57,080 INFO L87 Difference]: Start difference. First operand 1886 states and 3000 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 22 states have internal predecessors, (51), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-12-17 11:15:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:15:01,702 INFO L93 Difference]: Finished difference Result 2141 states and 3381 transitions. [2021-12-17 11:15:01,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 11:15:01,702 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 22 states have internal predecessors, (51), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 158 [2021-12-17 11:15:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:15:01,712 INFO L225 Difference]: With dead ends: 2141 [2021-12-17 11:15:01,712 INFO L226 Difference]: Without dead ends: 2139 [2021-12-17 11:15:01,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 213 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=376, Invalid=2380, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 11:15:01,714 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 106 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 1921 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 11:15:01,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 1120 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1921 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 11:15:01,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-12-17 11:15:02,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1906. [2021-12-17 11:15:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 962 states have (on average 1.2972972972972974) internal successors, (1248), 982 states have internal predecessors, (1248), 884 states have call successors, (884), 60 states have call predecessors, (884), 59 states have return successors, (883), 863 states have call predecessors, (883), 883 states have call successors, (883) [2021-12-17 11:15:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3015 transitions. [2021-12-17 11:15:02,526 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3015 transitions. Word has length 158 [2021-12-17 11:15:02,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:15:02,527 INFO L470 AbstractCegarLoop]: Abstraction has 1906 states and 3015 transitions. [2021-12-17 11:15:02,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 22 states have internal predecessors, (51), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-12-17 11:15:02,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3015 transitions. [2021-12-17 11:15:02,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-17 11:15:02,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:15:02,533 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:15:02,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-17 11:15:02,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:15:02,742 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:15:02,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:15:02,743 INFO L85 PathProgramCache]: Analyzing trace with hash -576479720, now seen corresponding path program 6 times [2021-12-17 11:15:02,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:15:02,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935359108] [2021-12-17 11:15:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:15:02,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:15:02,749 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:15:02,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559398393] [2021-12-17 11:15:02,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 11:15:02,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:15:02,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:15:02,750 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:15:02,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 11:15:03,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 11:15:03,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:15:03,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-17 11:15:03,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:16:39,231 WARN L228 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-17 11:16:39,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:16:39,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935359108] [2021-12-17 11:16:39,232 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:16:39,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559398393] [2021-12-17 11:16:39,232 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-12-17 11:16:39,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:16:39,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-17 11:16:39,232 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-17 11:16:39,232 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-17 11:16:39,238 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 11:16:39,231 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 101 [2021-12-17 11:16:39,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-17 11:16:39,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-17 11:16:39,462 INFO L732 BasicCegarLoop]: Path program histogram: [6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:16:39,464 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 11:16:39,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 11:16:39 BoogieIcfgContainer [2021-12-17 11:16:39,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 11:16:39,491 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 11:16:39,491 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 11:16:39,491 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 11:16:39,492 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:03:08" (3/4) ... [2021-12-17 11:16:39,493 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 11:16:39,493 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 11:16:39,494 INFO L158 Benchmark]: Toolchain (without parser) took 811856.25ms. Allocated memory was 102.8MB in the beginning and 396.4MB in the end (delta: 293.6MB). Free memory was 73.2MB in the beginning and 132.8MB in the end (delta: -59.6MB). Peak memory consumption was 233.7MB. Max. memory is 16.1GB. [2021-12-17 11:16:39,494 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 102.8MB. Free memory is still 59.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 11:16:39,494 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.92ms. Allocated memory is still 102.8MB. Free memory was 72.9MB in the beginning and 77.1MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 11:16:39,494 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.30ms. Allocated memory is still 102.8MB. Free memory was 77.1MB in the beginning and 75.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 11:16:39,495 INFO L158 Benchmark]: Boogie Preprocessor took 17.29ms. Allocated memory is still 102.8MB. Free memory was 75.6MB in the beginning and 74.7MB in the end (delta: 917.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 11:16:39,495 INFO L158 Benchmark]: RCFGBuilder took 233.72ms. Allocated memory is still 102.8MB. Free memory was 74.7MB in the beginning and 64.5MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 11:16:39,495 INFO L158 Benchmark]: TraceAbstraction took 811289.75ms. Allocated memory was 102.8MB in the beginning and 396.4MB in the end (delta: 293.6MB). Free memory was 63.8MB in the beginning and 132.8MB in the end (delta: -68.9MB). Peak memory consumption was 226.4MB. Max. memory is 16.1GB. [2021-12-17 11:16:39,495 INFO L158 Benchmark]: Witness Printer took 2.55ms. Allocated memory is still 396.4MB. Free memory is still 132.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 11:16:39,496 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 102.8MB. Free memory is still 59.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 275.92ms. Allocated memory is still 102.8MB. Free memory was 72.9MB in the beginning and 77.1MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.30ms. Allocated memory is still 102.8MB. Free memory was 77.1MB in the beginning and 75.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.29ms. Allocated memory is still 102.8MB. Free memory was 75.6MB in the beginning and 74.7MB in the end (delta: 917.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 233.72ms. Allocated memory is still 102.8MB. Free memory was 74.7MB in the beginning and 64.5MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 811289.75ms. Allocated memory was 102.8MB in the beginning and 396.4MB in the end (delta: 293.6MB). Free memory was 63.8MB in the beginning and 132.8MB in the end (delta: -68.9MB). Peak memory consumption was 226.4MB. Max. memory is 16.1GB. * Witness Printer took 2.55ms. Allocated memory is still 396.4MB. Free memory is still 132.8MB. There was no memory consumed. Max. memory is 16.1GB. * 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 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int x, y; [L20] long long a, b, p, q, r, s; [L21] x = __VERIFIER_nondet_int() [L22] y = __VERIFIER_nondet_int() [L23] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L23] RET assume_abort_if_not(x >= 1) [L24] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(y >= 1) [L26] a = x [L27] b = y [L28] p = 1 [L29] q = 0 [L30] r = 0 [L31] s = 1 [L33] COND TRUE 1 [L34] COND FALSE !(!(b != 0)) [L36] long long c, k; [L37] c = a [L38] k = 0 [L40] COND TRUE 1 [L41] COND FALSE !(!(c >= b)) [L43] long long d, v; [L44] d = 1 [L45] v = b [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == y * r + x * p) [L49] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(b == x * q + y * s) [L50] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(a == k * b + c) [L51] CALL __VERIFIER_assert(v == b * d) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(v == b * d) [L53] COND TRUE !(c >= 2 * v) [L58] c = c - v [L59] k = k + d [L40] COND TRUE 1 [L41] COND TRUE !(c >= b) [L62] a = b [L63] b = c [L64] long long temp; [L65] temp = p [L66] p = q [L67] q = temp - q * k [L68] temp = r [L69] r = s [L70] s = temp - s * k [L33] COND TRUE 1 [L34] COND FALSE !(!(b != 0)) [L36] long long c, k; [L37] c = a [L38] k = 0 [L40] COND TRUE 1 [L41] COND FALSE !(!(c >= b)) [L43] long long d, v; [L44] d = 1 [L45] v = b [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == y * r + x * p) [L49] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(b == x * q + y * s) [L50] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(a == k * b + c) [L51] CALL __VERIFIER_assert(v == b * d) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(v == b * d) [L53] COND TRUE !(c >= 2 * v) [L58] c = c - v [L59] k = k + d [L40] COND TRUE 1 [L41] COND TRUE !(c >= b) [L62] a = b [L63] b = c [L64] long long temp; [L65] temp = p [L66] p = q [L67] q = temp - q * k [L68] temp = r [L69] r = s [L70] s = temp - s * k [L33] COND TRUE 1 [L34] COND FALSE !(!(b != 0)) [L36] long long c, k; [L37] c = a [L38] k = 0 [L40] COND TRUE 1 [L41] COND FALSE !(!(c >= b)) [L43] long long d, v; [L44] d = 1 [L45] v = b [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == y * r + x * p) [L49] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(b == x * q + y * s) [L50] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(a == k * b + c) [L51] CALL __VERIFIER_assert(v == b * d) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(v == b * d) [L53] COND FALSE !(!(c >= 2 * v)) [L55] d = 2 * d [L56] v = 2 * v [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == y * r + x * p) [L49] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(b == x * q + y * s) [L50] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(a == k * b + c) [L51] CALL __VERIFIER_assert(v == b * d) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(v == b * d) [L53] COND FALSE !(!(c >= 2 * v)) [L55] d = 2 * d [L56] v = 2 * v [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == y * r + x * p) [L49] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(b == x * q + y * s) [L50] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(a == k * b + c) [L51] CALL __VERIFIER_assert(v == b * d) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(v == b * d) [L53] COND TRUE !(c >= 2 * v) [L58] c = c - v [L59] k = k + d [L40] COND TRUE 1 [L41] COND TRUE !(c >= b) [L62] a = b [L63] b = c [L64] long long temp; [L65] temp = p [L66] p = q [L67] q = temp - q * k [L68] temp = r [L69] r = s [L70] s = temp - s * k [L33] COND TRUE 1 [L34] COND FALSE !(!(b != 0)) [L36] long long c, k; [L37] c = a [L38] k = 0 [L40] COND TRUE 1 [L41] COND FALSE !(!(c >= b)) [L43] long long d, v; [L44] d = 1 [L45] v = b [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == y * r + x * p) [L49] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 811.2s, OverallIterations: 25, TraceHistogramMax: 22, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.1s, AutomataDifference: 471.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 45 mSolverCounterUnknown, 2050 SdHoareTripleChecker+Valid, 205.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1886 mSDsluCounter, 8447 SdHoareTripleChecker+Invalid, 203.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 235 IncrementalHoareTripleChecker+Unchecked, 7411 mSDsCounter, 3305 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14186 IncrementalHoareTripleChecker+Invalid, 17771 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3305 mSolverCounterUnsat, 1036 mSDtfsCounter, 14186 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2855 GetRequests, 2148 SyntacticMatches, 64 SemanticMatches, 643 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8628 ImplicationChecksByTransitivity, 353.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1906occurred in iteration=24, InterpolantAutomatonStates: 461, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.5s AutomataMinimizationTime, 24 MinimizatonAttempts, 1169 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 326.9s InterpolantComputationTime, 1735 NumberOfCodeBlocks, 1624 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 2355 ConstructedInterpolants, 11 QuantifiedInterpolants, 26522 SizeOfPredicates, 208 NumberOfNonLiveVariables, 4304 ConjunctsInSsa, 1111 ConjunctsInUnsatCore, 35 InterpolantComputations, 8 PerfectInterpolantSequences, 6421/7443 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/egcd3-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 11:16:41,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 11:16:41,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 11:16:41,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 11:16:41,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 11:16:41,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 11:16:41,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 11:16:41,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 11:16:41,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 11:16:41,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 11:16:41,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 11:16:41,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 11:16:41,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 11:16:41,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 11:16:41,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 11:16:41,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 11:16:41,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 11:16:41,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 11:16:41,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 11:16:41,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 11:16:41,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 11:16:41,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 11:16:41,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 11:16:41,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 11:16:41,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 11:16:41,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 11:16:41,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 11:16:41,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 11:16:41,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 11:16:41,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 11:16:41,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 11:16:41,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 11:16:41,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 11:16:41,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 11:16:41,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 11:16:41,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 11:16:41,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 11:16:41,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 11:16:41,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 11:16:41,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 11:16:41,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 11:16:41,407 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-17 11:16:41,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 11:16:41,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 11:16:41,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 11:16:41,449 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 11:16:41,450 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 11:16:41,450 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 11:16:41,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 11:16:41,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 11:16:41,451 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 11:16:41,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 11:16:41,452 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 11:16:41,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 11:16:41,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 11:16:41,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 11:16:41,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 11:16:41,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 11:16:41,453 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 11:16:41,454 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 11:16:41,454 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 11:16:41,454 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 11:16:41,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 11:16:41,454 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 11:16:41,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 11:16:41,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 11:16:41,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 11:16:41,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 11:16:41,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:16:41,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 11:16:41,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 11:16:41,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 11:16:41,456 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 11:16:41,456 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 11:16:41,457 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 11:16:41,457 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 11:16:41,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 11:16:41,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 11:16:41,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 11:16:41,458 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2021-12-17 11:16:41,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 11:16:41,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 11:16:41,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 11:16:41,803 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 11:16:41,803 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 11:16:41,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2021-12-17 11:16:41,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8caf393c/7defe1d1703246e491a406120c61acd4/FLAG85ebba71c [2021-12-17 11:16:42,362 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 11:16:42,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2021-12-17 11:16:42,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8caf393c/7defe1d1703246e491a406120c61acd4/FLAG85ebba71c [2021-12-17 11:16:42,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8caf393c/7defe1d1703246e491a406120c61acd4 [2021-12-17 11:16:42,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 11:16:42,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 11:16:42,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 11:16:42,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 11:16:42,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 11:16:42,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:16:42" (1/1) ... [2021-12-17 11:16:42,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57d5530e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:16:42, skipping insertion in model container [2021-12-17 11:16:42,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:16:42" (1/1) ... [2021-12-17 11:16:42,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 11:16:42,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 11:16:42,980 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2021-12-17 11:16:43,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:16:43,029 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 11:16:43,081 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2021-12-17 11:16:43,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:16:43,111 INFO L208 MainTranslator]: Completed translation [2021-12-17 11:16:43,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:16:43 WrapperNode [2021-12-17 11:16:43,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 11:16:43,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 11:16:43,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 11:16:43,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 11:16:43,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:16:43" (1/1) ... [2021-12-17 11:16:43,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:16:43" (1/1) ... [2021-12-17 11:16:43,149 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2021-12-17 11:16:43,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 11:16:43,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 11:16:43,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 11:16:43,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 11:16:43,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:16:43" (1/1) ... [2021-12-17 11:16:43,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:16:43" (1/1) ... [2021-12-17 11:16:43,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:16:43" (1/1) ... [2021-12-17 11:16:43,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:16:43" (1/1) ... [2021-12-17 11:16:43,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:16:43" (1/1) ... [2021-12-17 11:16:43,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:16:43" (1/1) ... [2021-12-17 11:16:43,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:16:43" (1/1) ... [2021-12-17 11:16:43,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 11:16:43,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 11:16:43,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 11:16:43,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 11:16:43,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:16:43" (1/1) ... [2021-12-17 11:16:43,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:16:43,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:16:43,225 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) [2021-12-17 11:16:43,251 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 [2021-12-17 11:16:43,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 11:16:43,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 11:16:43,269 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 11:16:43,269 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 11:16:43,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 11:16:43,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 11:16:43,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 11:16:43,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 11:16:43,337 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 11:16:43,339 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 11:16:43,785 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 11:16:43,802 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 11:16:43,802 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 11:16:43,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:16:43 BoogieIcfgContainer [2021-12-17 11:16:43,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 11:16:43,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 11:16:43,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 11:16:43,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 11:16:43,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:16:42" (1/3) ... [2021-12-17 11:16:43,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f206840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:16:43, skipping insertion in model container [2021-12-17 11:16:43,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:16:43" (2/3) ... [2021-12-17 11:16:43,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f206840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:16:43, skipping insertion in model container [2021-12-17 11:16:43,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:16:43" (3/3) ... [2021-12-17 11:16:43,811 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2021-12-17 11:16:43,817 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 11:16:43,818 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 11:16:43,868 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 11:16:43,874 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 11:16:43,875 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 11:16:43,889 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 11:16:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 11:16:43,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:16:43,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:16:43,895 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:16:43,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:16:43,900 INFO L85 PathProgramCache]: Analyzing trace with hash -149497031, now seen corresponding path program 1 times [2021-12-17 11:16:43,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 11:16:43,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438310536] [2021-12-17 11:16:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:16:43,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 11:16:43,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 11:16:43,915 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 11:16:43,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 11:16:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:16:44,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 11:16:44,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:16:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:16:44,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:16:44,129 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 11:16:44,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438310536] [2021-12-17 11:16:44,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438310536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:16:44,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:16:44,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 11:16:44,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317272187] [2021-12-17 11:16:44,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:16:44,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 11:16:44,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 11:16:44,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 11:16:44,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:16:44,160 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:16:44,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:16:44,186 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2021-12-17 11:16:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 11:16:44,190 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-12-17 11:16:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:16:44,196 INFO L225 Difference]: With dead ends: 61 [2021-12-17 11:16:44,197 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 11:16:44,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:16:44,206 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:16:44,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:16:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 11:16:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-17 11:16:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 11:16:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-12-17 11:16:44,252 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2021-12-17 11:16:44,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:16:44,253 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-12-17 11:16:44,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:16:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-12-17 11:16:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 11:16:44,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:16:44,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:16:44,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-17 11:16:44,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 11:16:44,483 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:16:44,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:16:44,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2030119444, now seen corresponding path program 1 times [2021-12-17 11:16:44,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 11:16:44,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850855575] [2021-12-17 11:16:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:16:44,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 11:16:44,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 11:16:44,487 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 11:16:44,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 11:16:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:16:44,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 11:16:44,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:16:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 11:16:44,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:16:44,907 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 11:16:44,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850855575] [2021-12-17 11:16:44,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850855575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:16:44,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:16:44,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 11:16:44,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428814288] [2021-12-17 11:16:44,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:16:44,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 11:16:44,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 11:16:44,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 11:16:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:16:44,911 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:16:45,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:16:45,002 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-12-17 11:16:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:16:45,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-17 11:16:45,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:16:45,009 INFO L225 Difference]: With dead ends: 37 [2021-12-17 11:16:45,010 INFO L226 Difference]: Without dead ends: 30 [2021-12-17 11:16:45,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:16:45,012 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:16:45,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 136 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-12-17 11:16:45,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-17 11:16:45,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-17 11:16:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 11:16:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-12-17 11:16:45,025 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2021-12-17 11:16:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:16:45,026 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-12-17 11:16:45,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:16:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-12-17 11:16:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 11:16:45,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:16:45,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:16:45,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 11:16:45,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 11:16:45,237 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:16:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:16:45,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1778657237, now seen corresponding path program 1 times [2021-12-17 11:16:45,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 11:16:45,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927393614] [2021-12-17 11:16:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:16:45,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 11:16:45,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 11:16:45,241 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 11:16:45,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 11:16:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:16:45,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 11:16:45,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:16:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:16:45,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:16:45,839 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 11:16:45,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927393614] [2021-12-17 11:16:45,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927393614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:16:45,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:16:45,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 11:16:45,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755560634] [2021-12-17 11:16:45,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:16:45,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 11:16:45,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 11:16:45,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 11:16:45,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:16:45,841 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 11:16:47,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:16:47,806 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2021-12-17 11:16:47,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 11:16:47,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-12-17 11:16:47,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:16:47,816 INFO L225 Difference]: With dead ends: 46 [2021-12-17 11:16:47,816 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 11:16:47,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:16:47,817 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 11:16:47,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 185 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 11:16:47,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 11:16:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-12-17 11:16:47,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 11:16:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2021-12-17 11:16:47,834 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2021-12-17 11:16:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:16:47,834 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2021-12-17 11:16:47,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 11:16:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2021-12-17 11:16:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 11:16:47,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:16:47,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:16:47,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 11:16:48,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 11:16:48,045 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:16:48,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:16:48,045 INFO L85 PathProgramCache]: Analyzing trace with hash 646289443, now seen corresponding path program 1 times [2021-12-17 11:16:48,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 11:16:48,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917160692] [2021-12-17 11:16:48,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:16:48,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 11:16:48,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 11:16:48,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 11:16:48,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 11:16:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:16:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:16:48,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:16:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 11:16:48,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:16:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 11:16:49,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 11:16:49,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917160692] [2021-12-17 11:16:49,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917160692] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:16:49,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:16:49,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-17 11:16:49,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347927314] [2021-12-17 11:16:49,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:16:49,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 11:16:49,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 11:16:49,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 11:16:49,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-17 11:16:49,370 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 11:16:49,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:16:49,563 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2021-12-17 11:16:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 11:16:49,566 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2021-12-17 11:16:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:16:49,566 INFO L225 Difference]: With dead ends: 55 [2021-12-17 11:16:49,567 INFO L226 Difference]: Without dead ends: 48 [2021-12-17 11:16:49,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-12-17 11:16:49,568 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:16:49,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 203 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2021-12-17 11:16:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-17 11:16:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-17 11:16:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 11:16:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-12-17 11:16:49,577 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 24 [2021-12-17 11:16:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:16:49,578 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-12-17 11:16:49,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 11:16:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-12-17 11:16:49,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 11:16:49,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:16:49,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:16:49,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 11:16:49,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 11:16:49,798 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:16:49,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:16:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1194834104, now seen corresponding path program 1 times [2021-12-17 11:16:49,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 11:16:49,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685399813] [2021-12-17 11:16:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:16:49,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 11:16:49,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 11:16:49,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 11:16:49,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 11:16:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:16:49,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 11:16:49,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:16:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:16:50,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:16:50,537 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 11:16:50,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685399813] [2021-12-17 11:16:50,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685399813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:16:50,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:16:50,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 11:16:50,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605292525] [2021-12-17 11:16:50,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:16:50,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 11:16:50,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 11:16:50,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 11:16:50,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:16:50,539 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 11:16:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:16:53,077 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-12-17 11:16:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 11:16:53,087 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-12-17 11:16:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:16:53,088 INFO L225 Difference]: With dead ends: 55 [2021-12-17 11:16:53,088 INFO L226 Difference]: Without dead ends: 53 [2021-12-17 11:16:53,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:16:53,089 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 11:16:53,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 174 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 11:16:53,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-17 11:16:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-12-17 11:16:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 37 states have internal predecessors, (43), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 11:16:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2021-12-17 11:16:53,099 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 27 [2021-12-17 11:16:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:16:53,099 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2021-12-17 11:16:53,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 11:16:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2021-12-17 11:16:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 11:16:53,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:16:53,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:16:53,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 11:16:53,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 11:16:53,313 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:16:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:16:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1392040386, now seen corresponding path program 1 times [2021-12-17 11:16:53,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 11:16:53,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520764758] [2021-12-17 11:16:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:16:53,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 11:16:53,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 11:16:53,316 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 11:16:53,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 11:16:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:16:53,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 11:16:53,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:16:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:16:54,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:17:04,962 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 11:17:04,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520764758] [2021-12-17 11:17:04,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520764758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:17:04,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:17:04,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-12-17 11:17:04,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668761178] [2021-12-17 11:17:04,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:04,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 11:17:04,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 11:17:04,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 11:17:04,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-17 11:17:04,964 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 11:17:12,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] Killed by 15