./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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-scaling/ps4-ll_unwindbound50.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 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 03:55:32,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 03:55:32,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 03:55:32,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 03:55:32,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 03:55:32,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 03:55:32,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 03:55:32,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 03:55:32,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 03:55:32,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 03:55:32,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 03:55:32,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 03:55:32,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 03:55:32,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 03:55:32,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 03:55:32,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 03:55:32,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 03:55:32,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 03:55:32,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 03:55:32,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 03:55:32,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 03:55:32,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 03:55:32,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 03:55:32,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 03:55:32,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 03:55:32,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 03:55:32,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 03:55:32,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 03:55:32,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 03:55:32,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 03:55:32,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 03:55:32,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 03:55:32,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 03:55:32,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 03:55:32,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 03:55:32,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 03:55:32,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 03:55:32,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 03:55:32,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 03:55:32,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 03:55:32,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 03:55:32,141 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 03:55:32,164 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 03:55:32,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 03:55:32,165 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 03:55:32,165 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 03:55:32,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 03:55:32,166 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 03:55:32,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 03:55:32,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 03:55:32,166 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 03:55:32,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 03:55:32,167 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 03:55:32,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 03:55:32,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 03:55:32,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 03:55:32,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 03:55:32,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 03:55:32,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 03:55:32,168 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 03:55:32,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 03:55:32,168 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 03:55:32,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 03:55:32,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 03:55:32,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 03:55:32,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 03:55:32,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 03:55:32,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 03:55:32,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 03:55:32,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 03:55:32,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 03:55:32,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 03:55:32,170 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 03:55:32,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 03:55:32,171 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 03:55:32,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 03:55:32,171 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 03:55:32,171 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 [2023-02-18 03:55:32,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 03:55:32,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 03:55:32,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 03:55:32,394 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 03:55:32,394 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 03:55:32,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2023-02-18 03:55:33,314 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 03:55:33,497 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 03:55:33,498 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2023-02-18 03:55:33,502 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bdf71048/f64adcb178a24d8885df3e3062615a8d/FLAG3fcdbe50c [2023-02-18 03:55:33,512 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bdf71048/f64adcb178a24d8885df3e3062615a8d [2023-02-18 03:55:33,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 03:55:33,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 03:55:33,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 03:55:33,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 03:55:33,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 03:55:33,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:55:33" (1/1) ... [2023-02-18 03:55:33,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67599f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33, skipping insertion in model container [2023-02-18 03:55:33,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:55:33" (1/1) ... [2023-02-18 03:55:33,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 03:55:33,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 03:55:33,666 WARN L237 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-scaling/ps4-ll_unwindbound50.c[458,471] [2023-02-18 03:55:33,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 03:55:33,679 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 03:55:33,686 WARN L237 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-scaling/ps4-ll_unwindbound50.c[458,471] [2023-02-18 03:55:33,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 03:55:33,697 INFO L208 MainTranslator]: Completed translation [2023-02-18 03:55:33,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33 WrapperNode [2023-02-18 03:55:33,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 03:55:33,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 03:55:33,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 03:55:33,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 03:55:33,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33" (1/1) ... [2023-02-18 03:55:33,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33" (1/1) ... [2023-02-18 03:55:33,716 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2023-02-18 03:55:33,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 03:55:33,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 03:55:33,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 03:55:33,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 03:55:33,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33" (1/1) ... [2023-02-18 03:55:33,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33" (1/1) ... [2023-02-18 03:55:33,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33" (1/1) ... [2023-02-18 03:55:33,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33" (1/1) ... [2023-02-18 03:55:33,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33" (1/1) ... [2023-02-18 03:55:33,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33" (1/1) ... [2023-02-18 03:55:33,726 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33" (1/1) ... [2023-02-18 03:55:33,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33" (1/1) ... [2023-02-18 03:55:33,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 03:55:33,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 03:55:33,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 03:55:33,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 03:55:33,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33" (1/1) ... [2023-02-18 03:55:33,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 03:55:33,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:55:33,752 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) [2023-02-18 03:55:33,763 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 [2023-02-18 03:55:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 03:55:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 03:55:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 03:55:33,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 03:55:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 03:55:33,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 03:55:33,826 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 03:55:33,828 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 03:55:33,906 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 03:55:33,909 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 03:55:33,910 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 03:55:33,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:55:33 BoogieIcfgContainer [2023-02-18 03:55:33,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 03:55:33,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 03:55:33,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 03:55:33,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 03:55:33,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 03:55:33" (1/3) ... [2023-02-18 03:55:33,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8ae4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:55:33, skipping insertion in model container [2023-02-18 03:55:33,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:55:33" (2/3) ... [2023-02-18 03:55:33,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8ae4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:55:33, skipping insertion in model container [2023-02-18 03:55:33,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:55:33" (3/3) ... [2023-02-18 03:55:33,916 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.c [2023-02-18 03:55:33,927 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 03:55:33,928 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 03:55:33,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 03:55:33,959 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a9a3156, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 03:55:33,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 03:55:33,962 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 03:55:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 03:55:33,967 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:55:33,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:55:33,967 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:55:33,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:55:33,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1819788390, now seen corresponding path program 1 times [2023-02-18 03:55:33,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:55:33,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278382877] [2023-02-18 03:55:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:33,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:55:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:55:34,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:55:34,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278382877] [2023-02-18 03:55:34,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 03:55:34,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507998374] [2023-02-18 03:55:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:34,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:55:34,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:55:34,050 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) [2023-02-18 03:55:34,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 03:55:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:55:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 03:55:34,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:55:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 03:55:34,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 03:55:34,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507998374] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 03:55:34,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 03:55:34,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 03:55:34,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096032429] [2023-02-18 03:55:34,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 03:55:34,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 03:55:34,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:55:34,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 03:55:34,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 03:55:34,167 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 03:55:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:55:34,178 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2023-02-18 03:55:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 03:55:34,180 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 03:55:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:55:34,184 INFO L225 Difference]: With dead ends: 34 [2023-02-18 03:55:34,184 INFO L226 Difference]: Without dead ends: 14 [2023-02-18 03:55:34,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 03:55:34,188 INFO L413 NwaCegarLoop]: 21 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, 21 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 [2023-02-18 03:55:34,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 03:55:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-02-18 03:55:34,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-02-18 03:55:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 03:55:34,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-02-18 03:55:34,209 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2023-02-18 03:55:34,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:55:34,209 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-02-18 03:55:34,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 03:55:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-02-18 03:55:34,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 03:55:34,210 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:55:34,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:55:34,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 03:55:34,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-18 03:55:34,415 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:55:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:55:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash 178441499, now seen corresponding path program 1 times [2023-02-18 03:55:34,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:55:34,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555867191] [2023-02-18 03:55:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:34,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:55:34,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:55:34,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588836873] [2023-02-18 03:55:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:34,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:55:34,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:55:34,441 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) [2023-02-18 03:55:34,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 03:55:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:55:34,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 03:55:34,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:55:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 03:55:34,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 03:55:34,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:55:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555867191] [2023-02-18 03:55:34,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:55:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588836873] [2023-02-18 03:55:34,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588836873] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 03:55:34,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 03:55:34,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 03:55:34,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16064494] [2023-02-18 03:55:34,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 03:55:34,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 03:55:34,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:55:34,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 03:55:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 03:55:34,525 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 03:55:34,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:55:34,549 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-02-18 03:55:34,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 03:55:34,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 03:55:34,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:55:34,550 INFO L225 Difference]: With dead ends: 24 [2023-02-18 03:55:34,550 INFO L226 Difference]: Without dead ends: 16 [2023-02-18 03:55:34,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 03:55:34,551 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 03:55:34,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 03:55:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-18 03:55:34,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-02-18 03:55:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 03:55:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-02-18 03:55:34,560 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2023-02-18 03:55:34,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:55:34,560 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-02-18 03:55:34,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 03:55:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-02-18 03:55:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 03:55:34,561 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:55:34,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:55:34,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 03:55:34,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-18 03:55:34,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:55:34,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:55:34,767 INFO L85 PathProgramCache]: Analyzing trace with hash 180228959, now seen corresponding path program 1 times [2023-02-18 03:55:34,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:55:34,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236337201] [2023-02-18 03:55:34,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:34,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:55:34,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:55:34,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16715911] [2023-02-18 03:55:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:34,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:55:34,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:55:34,794 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) [2023-02-18 03:55:34,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 03:55:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:55:34,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 03:55:34,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:55:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 03:55:34,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 03:55:34,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:55:34,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236337201] [2023-02-18 03:55:34,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:55:34,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16715911] [2023-02-18 03:55:34,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16715911] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 03:55:34,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 03:55:34,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 03:55:34,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964406290] [2023-02-18 03:55:34,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 03:55:34,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 03:55:34,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:55:34,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 03:55:34,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 03:55:34,873 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 03:55:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:55:34,925 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-02-18 03:55:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 03:55:34,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 03:55:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:55:34,926 INFO L225 Difference]: With dead ends: 26 [2023-02-18 03:55:34,926 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 03:55:34,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 03:55:34,929 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 03:55:34,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 48 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 03:55:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 03:55:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-18 03:55:34,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 4 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) [2023-02-18 03:55:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-02-18 03:55:34,941 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2023-02-18 03:55:34,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:55:34,942 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-02-18 03:55:34,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 03:55:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-02-18 03:55:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 03:55:34,944 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:55:34,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:55:34,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 03:55:35,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:55:35,149 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:55:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:55:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash 823572993, now seen corresponding path program 1 times [2023-02-18 03:55:35,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:55:35,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000746258] [2023-02-18 03:55:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:35,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:55:35,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:55:35,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010395576] [2023-02-18 03:55:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:35,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:55:35,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:55:35,162 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) [2023-02-18 03:55:35,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 03:55:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:55:35,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 03:55:35,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:55:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 03:55:35,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:55:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 03:55:35,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:55:35,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000746258] [2023-02-18 03:55:35,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:55:35,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010395576] [2023-02-18 03:55:35,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010395576] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 03:55:35,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 03:55:35,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 03:55:35,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275785321] [2023-02-18 03:55:35,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 03:55:35,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 03:55:35,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:55:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 03:55:35,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 03:55:35,228 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 03:55:35,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:55:35,272 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2023-02-18 03:55:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 03:55:35,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-02-18 03:55:35,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:55:35,273 INFO L225 Difference]: With dead ends: 56 [2023-02-18 03:55:35,273 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 03:55:35,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-18 03:55:35,274 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 03:55:35,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 90 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 03:55:35,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 03:55:35,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2023-02-18 03:55:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 03:55:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-02-18 03:55:35,282 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 16 [2023-02-18 03:55:35,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:55:35,282 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-02-18 03:55:35,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 03:55:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-02-18 03:55:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 03:55:35,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:55:35,283 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:55:35,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 03:55:35,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:55:35,490 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:55:35,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:55:35,491 INFO L85 PathProgramCache]: Analyzing trace with hash 825360453, now seen corresponding path program 1 times [2023-02-18 03:55:35,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:55:35,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413133365] [2023-02-18 03:55:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:35,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:55:35,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:55:35,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28590665] [2023-02-18 03:55:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:35,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:55:35,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:55:35,500 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) [2023-02-18 03:55:35,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 03:55:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:55:35,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 03:55:35,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:55:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 03:55:35,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:55:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 03:55:35,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:55:35,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413133365] [2023-02-18 03:55:35,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:55:35,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28590665] [2023-02-18 03:55:35,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28590665] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 03:55:35,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 03:55:35,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-02-18 03:55:35,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768658978] [2023-02-18 03:55:35,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 03:55:35,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 03:55:35,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:55:35,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 03:55:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 03:55:35,793 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 03:55:35,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:55:35,879 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2023-02-18 03:55:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 03:55:35,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-02-18 03:55:35,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:55:35,881 INFO L225 Difference]: With dead ends: 58 [2023-02-18 03:55:35,881 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 03:55:35,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-18 03:55:35,882 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 03:55:35,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 69 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 03:55:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 03:55:35,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-02-18 03:55:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 03:55:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-02-18 03:55:35,899 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 16 [2023-02-18 03:55:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:55:35,899 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-02-18 03:55:35,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 03:55:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-02-18 03:55:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 03:55:35,900 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:55:35,901 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:55:35,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 03:55:36,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:55:36,106 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:55:36,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:55:36,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1696898494, now seen corresponding path program 1 times [2023-02-18 03:55:36,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:55:36,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601798329] [2023-02-18 03:55:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:36,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:55:36,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:55:36,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751954080] [2023-02-18 03:55:36,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:36,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:55:36,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:55:36,115 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) [2023-02-18 03:55:36,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 03:55:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:55:36,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 03:55:36,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:55:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 03:55:36,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:55:36,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:55:36,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601798329] [2023-02-18 03:55:36,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:55:36,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751954080] [2023-02-18 03:55:36,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751954080] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:55:36,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:55:36,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-18 03:55:36,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939317113] [2023-02-18 03:55:36,298 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:55:36,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 03:55:36,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:55:36,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 03:55:36,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-02-18 03:55:36,300 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 03:55:36,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:55:36,377 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2023-02-18 03:55:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 03:55:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-18 03:55:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:55:36,378 INFO L225 Difference]: With dead ends: 46 [2023-02-18 03:55:36,378 INFO L226 Difference]: Without dead ends: 41 [2023-02-18 03:55:36,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-02-18 03:55:36,379 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 03:55:36,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 65 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 03:55:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-18 03:55:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-18 03:55:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 03:55:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-02-18 03:55:36,384 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 22 [2023-02-18 03:55:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:55:36,384 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-02-18 03:55:36,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 03:55:36,385 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-02-18 03:55:36,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 03:55:36,385 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:55:36,385 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 03:55:36,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 03:55:36,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:55:36,590 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:55:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:55:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash -47987544, now seen corresponding path program 2 times [2023-02-18 03:55:36,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:55:36,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839465358] [2023-02-18 03:55:36,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:36,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:55:36,601 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:55:36,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367094065] [2023-02-18 03:55:36,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 03:55:36,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:55:36,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:55:36,615 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) [2023-02-18 03:55:36,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 03:55:36,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 03:55:36,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:55:36,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 03:55:36,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:55:38,678 WARN L859 $PredicateComparison]: unable to prove that (and (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0) (= |c_ULTIMATE.start_main_~y~0#1| (+ 0 1)) (= 0 (+ |c_ULTIMATE.start_main_~c~0#1| (- 1)))) is different from true [2023-02-18 03:55:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-02-18 03:55:40,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:55:42,815 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:55:42,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:55:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839465358] [2023-02-18 03:55:42,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:55:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367094065] [2023-02-18 03:55:42,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367094065] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:55:42,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:55:42,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-18 03:55:42,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342591249] [2023-02-18 03:55:42,818 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:55:42,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 03:55:42,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:55:42,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 03:55:42,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=148, Unknown=3, NotChecked=50, Total=240 [2023-02-18 03:55:42,819 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 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) [2023-02-18 03:55:44,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 03:55:46,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 03:55:48,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 03:55:50,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 03:55:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:55:50,518 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2023-02-18 03:55:50,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 03:55:50,518 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 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 30 [2023-02-18 03:55:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:55:50,519 INFO L225 Difference]: With dead ends: 46 [2023-02-18 03:55:50,519 INFO L226 Difference]: Without dead ends: 41 [2023-02-18 03:55:50,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=58, Invalid=219, Unknown=3, NotChecked=62, Total=342 [2023-02-18 03:55:50,519 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-02-18 03:55:50,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 3 Unknown, 30 Unchecked, 7.7s Time] [2023-02-18 03:55:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-18 03:55:50,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-18 03:55:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 03:55:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-02-18 03:55:50,525 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 30 [2023-02-18 03:55:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:55:50,525 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-02-18 03:55:50,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 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) [2023-02-18 03:55:50,526 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-02-18 03:55:50,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 03:55:50,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:55:50,527 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2023-02-18 03:55:50,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 03:55:50,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:55:50,727 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:55:50,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:55:50,728 INFO L85 PathProgramCache]: Analyzing trace with hash -584163058, now seen corresponding path program 3 times [2023-02-18 03:55:50,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:55:50,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837101761] [2023-02-18 03:55:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:55:50,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:55:50,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:55:50,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859508881] [2023-02-18 03:55:50,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 03:55:50,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:55:50,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:55:50,785 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) [2023-02-18 03:55:50,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 03:55:50,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 03:55:50,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:55:50,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-18 03:55:50,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:55:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 03:55:50,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:56:02,199 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|))) (or (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9|)) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| 2) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|)) 4) 0))))) is different from true [2023-02-18 03:56:08,226 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|))) (or (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9|)) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| 2) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|)) 4) 0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 03:56:10,236 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:56:10,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:56:10,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837101761] [2023-02-18 03:56:10,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:56:10,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859508881] [2023-02-18 03:56:10,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859508881] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:56:10,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:56:10,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-18 03:56:10,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487239433] [2023-02-18 03:56:10,244 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:56:10,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 03:56:10,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:56:10,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 03:56:10,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=171, Unknown=5, NotChecked=84, Total=306 [2023-02-18 03:56:10,246 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 03:56:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:56:10,359 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2023-02-18 03:56:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 03:56:10,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2023-02-18 03:56:10,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:56:10,360 INFO L225 Difference]: With dead ends: 48 [2023-02-18 03:56:10,360 INFO L226 Difference]: Without dead ends: 43 [2023-02-18 03:56:10,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=66, Invalid=247, Unknown=5, NotChecked=102, Total=420 [2023-02-18 03:56:10,361 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 03:56:10,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 113 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 03:56:10,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-18 03:56:10,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-02-18 03:56:10,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 03:56:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2023-02-18 03:56:10,365 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2023-02-18 03:56:10,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:56:10,366 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2023-02-18 03:56:10,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 03:56:10,366 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2023-02-18 03:56:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 03:56:10,366 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:56:10,366 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-18 03:56:10,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 03:56:10,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-18 03:56:10,573 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:56:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:56:10,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2045303987, now seen corresponding path program 2 times [2023-02-18 03:56:10,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:56:10,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118867891] [2023-02-18 03:56:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:10,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:56:10,595 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:56:10,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080384180] [2023-02-18 03:56:10,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 03:56:10,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:56:10,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:56:10,598 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) [2023-02-18 03:56:10,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 03:56:10,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 03:56:10,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:56:10,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 03:56:10,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:56:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 03:56:10,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:56:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 03:56:10,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:56:10,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118867891] [2023-02-18 03:56:10,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:56:10,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080384180] [2023-02-18 03:56:10,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080384180] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 03:56:10,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 03:56:10,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-18 03:56:10,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887155209] [2023-02-18 03:56:10,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 03:56:10,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 03:56:10,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:56:10,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 03:56:10,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 03:56:10,714 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 03:56:10,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:56:10,841 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2023-02-18 03:56:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 03:56:10,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2023-02-18 03:56:10,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:56:10,843 INFO L225 Difference]: With dead ends: 119 [2023-02-18 03:56:10,843 INFO L226 Difference]: Without dead ends: 114 [2023-02-18 03:56:10,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-18 03:56:10,845 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 67 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 03:56:10,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 129 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 03:56:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-18 03:56:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2023-02-18 03:56:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 03:56:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2023-02-18 03:56:10,860 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 40 [2023-02-18 03:56:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:56:10,860 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2023-02-18 03:56:10,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 03:56:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2023-02-18 03:56:10,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 03:56:10,865 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:56:10,866 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2023-02-18 03:56:10,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-18 03:56:11,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:56:11,071 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:56:11,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:56:11,071 INFO L85 PathProgramCache]: Analyzing trace with hash -635357324, now seen corresponding path program 4 times [2023-02-18 03:56:11,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:56:11,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861876655] [2023-02-18 03:56:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:11,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:56:11,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:56:11,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104065025] [2023-02-18 03:56:11,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 03:56:11,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:56:11,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:56:11,086 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) [2023-02-18 03:56:11,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 03:56:11,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 03:56:11,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:56:11,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 03:56:11,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:56:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 03:56:11,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:56:13,258 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:56:13,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:56:13,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861876655] [2023-02-18 03:56:13,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:56:13,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104065025] [2023-02-18 03:56:13,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104065025] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:56:13,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:56:13,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-18 03:56:13,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633829532] [2023-02-18 03:56:13,261 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:56:13,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 03:56:13,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:56:13,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 03:56:13,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=200, Unknown=1, NotChecked=28, Total=272 [2023-02-18 03:56:13,262 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 03:56:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:56:13,402 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2023-02-18 03:56:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 03:56:13,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2023-02-18 03:56:13,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:56:13,404 INFO L225 Difference]: With dead ends: 94 [2023-02-18 03:56:13,404 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 03:56:13,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=62, Invalid=283, Unknown=1, NotChecked=34, Total=380 [2023-02-18 03:56:13,405 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 03:56:13,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 159 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 03:56:13,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 03:56:13,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-18 03:56:13,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 67 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 03:56:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2023-02-18 03:56:13,414 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 46 [2023-02-18 03:56:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:56:13,414 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2023-02-18 03:56:13,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 03:56:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2023-02-18 03:56:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 03:56:13,416 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:56:13,416 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2023-02-18 03:56:13,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 03:56:13,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 03:56:13,625 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:56:13,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:56:13,626 INFO L85 PathProgramCache]: Analyzing trace with hash 220350426, now seen corresponding path program 5 times [2023-02-18 03:56:13,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:56:13,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228740400] [2023-02-18 03:56:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:13,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:56:13,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:56:13,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967486167] [2023-02-18 03:56:13,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 03:56:13,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:56:13,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:56:13,642 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) [2023-02-18 03:56:13,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 03:56:13,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-18 03:56:13,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:56:13,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 03:56:13,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:56:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 70 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 03:56:13,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:56:13,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:56:13,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228740400] [2023-02-18 03:56:13,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:56:13,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967486167] [2023-02-18 03:56:13,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967486167] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:56:13,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:56:13,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-18 03:56:13,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912859820] [2023-02-18 03:56:13,860 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:56:13,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 03:56:13,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:56:13,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 03:56:13,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-02-18 03:56:13,861 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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) [2023-02-18 03:56:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:56:14,015 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2023-02-18 03:56:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 03:56:14,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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) Word has length 54 [2023-02-18 03:56:14,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:56:14,016 INFO L225 Difference]: With dead ends: 94 [2023-02-18 03:56:14,016 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 03:56:14,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-02-18 03:56:14,017 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 03:56:14,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 03:56:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 03:56:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-18 03:56:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 03:56:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2023-02-18 03:56:14,023 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 54 [2023-02-18 03:56:14,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:56:14,023 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2023-02-18 03:56:14,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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) [2023-02-18 03:56:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2023-02-18 03:56:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-18 03:56:14,024 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:56:14,024 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2023-02-18 03:56:14,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 03:56:14,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 03:56:14,229 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:56:14,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:56:14,230 INFO L85 PathProgramCache]: Analyzing trace with hash 156734016, now seen corresponding path program 6 times [2023-02-18 03:56:14,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:56:14,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640735740] [2023-02-18 03:56:14,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:14,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:56:14,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:56:14,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48517427] [2023-02-18 03:56:14,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 03:56:14,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:56:14,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:56:14,238 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) [2023-02-18 03:56:14,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 03:56:14,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 03:56:14,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:56:14,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 03:56:14,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:56:16,376 WARN L859 $PredicateComparison]: unable to prove that (and (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0) (= |c_ULTIMATE.start_main_~y~0#1| (+ 0 1)) (= 0 (+ |c_ULTIMATE.start_main_~c~0#1| (- 1)))) is different from true [2023-02-18 03:56:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 16 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 6 not checked. [2023-02-18 03:56:18,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:56:19,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:56:19,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640735740] [2023-02-18 03:56:19,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:56:19,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48517427] [2023-02-18 03:56:19,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48517427] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:56:19,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:56:19,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-18 03:56:19,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732332549] [2023-02-18 03:56:19,768 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:56:19,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 03:56:19,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:56:19,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 03:56:19,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=259, Unknown=2, NotChecked=32, Total=342 [2023-02-18 03:56:19,769 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 03:56:21,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 03:56:23,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 03:56:25,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 03:56:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:56:25,938 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2023-02-18 03:56:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 03:56:25,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 62 [2023-02-18 03:56:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:56:25,939 INFO L225 Difference]: With dead ends: 94 [2023-02-18 03:56:25,939 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 03:56:25,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=68, Invalid=354, Unknown=2, NotChecked=38, Total=462 [2023-02-18 03:56:25,940 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-02-18 03:56:25,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 221 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 3 Unknown, 47 Unchecked, 6.1s Time] [2023-02-18 03:56:25,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 03:56:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-18 03:56:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 03:56:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2023-02-18 03:56:25,955 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 62 [2023-02-18 03:56:25,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:56:25,956 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2023-02-18 03:56:25,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 03:56:25,956 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2023-02-18 03:56:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-18 03:56:25,957 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:56:25,957 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2023-02-18 03:56:25,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 03:56:26,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 03:56:26,162 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:56:26,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:56:26,162 INFO L85 PathProgramCache]: Analyzing trace with hash -605612378, now seen corresponding path program 7 times [2023-02-18 03:56:26,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:56:26,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712292433] [2023-02-18 03:56:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:26,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:56:26,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:56:26,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862430621] [2023-02-18 03:56:26,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 03:56:26,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:56:26,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:56:26,176 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) [2023-02-18 03:56:26,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 03:56:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:56:26,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 03:56:26,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:56:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 36 proven. 113 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-18 03:56:26,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:56:28,386 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= (mod (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (- .cse0)) 0))) is different from false [2023-02-18 03:56:32,423 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_21| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|))) (or (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_21|)) 0) (= 0 (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| 2) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|)) 4)))))) is different from true [2023-02-18 03:56:38,471 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_21| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|))) (or (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_21|)) 0) (= 0 (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| 2) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|)) 4)))))) is different from true [2023-02-18 03:56:40,477 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:56:40,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:56:40,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712292433] [2023-02-18 03:56:40,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:56:40,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862430621] [2023-02-18 03:56:40,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862430621] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:56:40,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:56:40,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-18 03:56:40,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202972310] [2023-02-18 03:56:40,481 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:56:40,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 03:56:40,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:56:40,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 03:56:40,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=269, Unknown=4, NotChecked=140, Total=462 [2023-02-18 03:56:40,482 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 03:56:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:56:40,677 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2023-02-18 03:56:40,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 03:56:40,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 70 [2023-02-18 03:56:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:56:40,678 INFO L225 Difference]: With dead ends: 94 [2023-02-18 03:56:40,678 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 03:56:40,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=68, Invalid=364, Unknown=4, NotChecked=164, Total=600 [2023-02-18 03:56:40,679 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 03:56:40,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 285 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 03:56:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 03:56:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-18 03:56:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 03:56:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2023-02-18 03:56:40,685 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 70 [2023-02-18 03:56:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:56:40,685 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2023-02-18 03:56:40,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 03:56:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2023-02-18 03:56:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-18 03:56:40,686 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:56:40,686 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2023-02-18 03:56:40,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 03:56:40,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 03:56:40,890 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:56:40,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:56:40,890 INFO L85 PathProgramCache]: Analyzing trace with hash 200725772, now seen corresponding path program 8 times [2023-02-18 03:56:40,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:56:40,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678606061] [2023-02-18 03:56:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:40,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:56:40,896 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:56:40,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873171197] [2023-02-18 03:56:40,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 03:56:40,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:56:40,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:56:40,902 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) [2023-02-18 03:56:40,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 03:56:40,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 03:56:40,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:56:40,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 03:56:40,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:56:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 38 proven. 148 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-18 03:56:41,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:56:43,143 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:56:43,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:56:43,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678606061] [2023-02-18 03:56:43,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:56:43,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873171197] [2023-02-18 03:56:43,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873171197] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:56:43,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:56:43,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-18 03:56:43,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66881421] [2023-02-18 03:56:43,145 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:56:43,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 03:56:43,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:56:43,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 03:56:43,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=328, Unknown=1, NotChecked=36, Total=420 [2023-02-18 03:56:43,146 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 03:56:43,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:56:43,370 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2023-02-18 03:56:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 03:56:43,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 78 [2023-02-18 03:56:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:56:43,371 INFO L225 Difference]: With dead ends: 94 [2023-02-18 03:56:43,371 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 03:56:43,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=74, Invalid=435, Unknown=1, NotChecked=42, Total=552 [2023-02-18 03:56:43,371 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 03:56:43,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 313 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 03:56:43,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 03:56:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-18 03:56:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 03:56:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2023-02-18 03:56:43,377 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 78 [2023-02-18 03:56:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:56:43,377 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2023-02-18 03:56:43,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 03:56:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2023-02-18 03:56:43,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-18 03:56:43,398 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:56:43,398 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2023-02-18 03:56:43,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 03:56:43,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:56:43,599 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:56:43,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:56:43,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1699951246, now seen corresponding path program 9 times [2023-02-18 03:56:43,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:56:43,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948272889] [2023-02-18 03:56:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:43,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:56:43,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:56:43,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775034918] [2023-02-18 03:56:43,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 03:56:43,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:56:43,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:56:43,610 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) [2023-02-18 03:56:43,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 03:56:43,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-18 03:56:43,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:56:43,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-18 03:56:43,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:56:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 28 proven. 199 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-18 03:56:43,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:57:04,663 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82|)) 4) 0) (= (let ((.cse0 (+ (+ (+ (+ (+ (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| 1) 1) 1) 1) 1) 1))) (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41| .cse0) (- (* .cse0 .cse0)))) 0)))) is different from true [2023-02-18 03:57:10,676 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82|)) 4) 0) (= (let ((.cse0 (+ (+ (+ (+ (+ (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| 1) 1) 1) 1) 1) 1))) (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41| .cse0) (- (* .cse0 .cse0)))) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 03:57:12,683 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1))) (or (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (= (let ((.cse1 (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)))) (+ (- (* .cse1 .cse1)) (* .cse1 |c_ULTIMATE.start_main_~k~0#1|))) 0) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:57:14,696 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|) (= (let ((.cse1 (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1))) (+ (* .cse1 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0))) is different from false [2023-02-18 03:57:16,711 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (let ((.cse0 (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1))) (or (not (< .cse0 |ULTIMATE.start_main_~k~0#1|)) (< (+ .cse0 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse1 (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1))) (+ (* .cse1 |ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0))))) is different from false [2023-02-18 03:57:16,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:57:16,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948272889] [2023-02-18 03:57:16,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:57:16,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775034918] [2023-02-18 03:57:16,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775034918] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:57:16,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:57:16,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-18 03:57:16,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78330102] [2023-02-18 03:57:16,716 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:57:16,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 03:57:16,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:57:16,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 03:57:16,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=575, Unknown=6, NotChecked=270, Total=992 [2023-02-18 03:57:16,717 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 03:57:17,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:57:17,028 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2023-02-18 03:57:17,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 03:57:17,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 86 [2023-02-18 03:57:17,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:57:17,029 INFO L225 Difference]: With dead ends: 96 [2023-02-18 03:57:17,029 INFO L226 Difference]: Without dead ends: 91 [2023-02-18 03:57:17,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=167, Invalid=717, Unknown=6, NotChecked=300, Total=1190 [2023-02-18 03:57:17,030 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 03:57:17,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 389 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 03:57:17,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-18 03:57:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-02-18 03:57:17,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 03:57:17,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2023-02-18 03:57:17,036 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2023-02-18 03:57:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:57:17,036 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2023-02-18 03:57:17,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 03:57:17,036 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2023-02-18 03:57:17,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-02-18 03:57:17,042 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:57:17,042 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-02-18 03:57:17,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-18 03:57:17,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 03:57:17,247 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:57:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:57:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash -780287977, now seen corresponding path program 3 times [2023-02-18 03:57:17,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:57:17,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399448955] [2023-02-18 03:57:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:57:17,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:57:17,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:57:17,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066608833] [2023-02-18 03:57:17,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 03:57:17,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:57:17,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:57:17,260 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) [2023-02-18 03:57:17,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 03:57:17,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-18 03:57:17,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:57:17,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 03:57:17,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:57:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 03:57:17,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:57:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 03:57:17,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:57:17,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399448955] [2023-02-18 03:57:17,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:57:17,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066608833] [2023-02-18 03:57:17,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066608833] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 03:57:17,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 03:57:17,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-02-18 03:57:17,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141466211] [2023-02-18 03:57:17,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 03:57:17,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 03:57:17,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:57:17,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 03:57:17,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-02-18 03:57:17,545 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 03:57:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:57:17,835 INFO L93 Difference]: Finished difference Result 245 states and 257 transitions. [2023-02-18 03:57:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-18 03:57:17,836 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2023-02-18 03:57:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:57:17,837 INFO L225 Difference]: With dead ends: 245 [2023-02-18 03:57:17,837 INFO L226 Difference]: Without dead ends: 240 [2023-02-18 03:57:17,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 03:57:17,838 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 295 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 03:57:17,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 207 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 03:57:17,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-02-18 03:57:17,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 185. [2023-02-18 03:57:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0935251798561152) internal successors, (152), 139 states have internal predecessors, (152), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 03:57:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 197 transitions. [2023-02-18 03:57:17,848 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 197 transitions. Word has length 88 [2023-02-18 03:57:17,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:57:17,848 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 197 transitions. [2023-02-18 03:57:17,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 03:57:17,848 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 197 transitions. [2023-02-18 03:57:17,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-18 03:57:17,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:57:17,849 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1] [2023-02-18 03:57:17,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-18 03:57:18,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 03:57:18,054 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:57:18,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:57:18,055 INFO L85 PathProgramCache]: Analyzing trace with hash 53411800, now seen corresponding path program 10 times [2023-02-18 03:57:18,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:57:18,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829559100] [2023-02-18 03:57:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:57:18,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:57:18,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:57:18,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837175392] [2023-02-18 03:57:18,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 03:57:18,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:57:18,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:57:18,062 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) [2023-02-18 03:57:18,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 03:57:18,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 03:57:18,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:57:18,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-18 03:57:18,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:57:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 24 proven. 248 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-18 03:57:18,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:57:18,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:57:18,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829559100] [2023-02-18 03:57:18,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:57:18,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837175392] [2023-02-18 03:57:18,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837175392] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:57:18,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:57:18,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-18 03:57:18,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377021097] [2023-02-18 03:57:18,432 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:57:18,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 03:57:18,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:57:18,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 03:57:18,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-02-18 03:57:18,433 INFO L87 Difference]: Start difference. First operand 185 states and 197 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 03:57:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:57:18,736 INFO L93 Difference]: Finished difference Result 190 states and 201 transitions. [2023-02-18 03:57:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 03:57:18,736 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 94 [2023-02-18 03:57:18,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:57:18,737 INFO L225 Difference]: With dead ends: 190 [2023-02-18 03:57:18,737 INFO L226 Difference]: Without dead ends: 185 [2023-02-18 03:57:18,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-02-18 03:57:18,738 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 03:57:18,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 447 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 03:57:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-18 03:57:18,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-02-18 03:57:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0863309352517985) internal successors, (151), 139 states have internal predecessors, (151), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 03:57:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 196 transitions. [2023-02-18 03:57:18,750 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 196 transitions. Word has length 94 [2023-02-18 03:57:18,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:57:18,750 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 196 transitions. [2023-02-18 03:57:18,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 03:57:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 196 transitions. [2023-02-18 03:57:18,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-02-18 03:57:18,751 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:57:18,751 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2023-02-18 03:57:18,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 03:57:18,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 03:57:18,956 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:57:18,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:57:18,957 INFO L85 PathProgramCache]: Analyzing trace with hash 983788606, now seen corresponding path program 11 times [2023-02-18 03:57:18,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:57:18,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448322186] [2023-02-18 03:57:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:57:18,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:57:18,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:57:18,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811085501] [2023-02-18 03:57:18,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 03:57:18,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:57:18,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:57:18,965 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) [2023-02-18 03:57:18,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 03:57:19,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-18 03:57:19,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:57:19,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-18 03:57:19,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:57:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 38 proven. 283 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-18 03:57:19,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:57:21,481 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (= (let ((.cse0 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1))) (+ (- (* .cse0 .cse0)) (* |c_ULTIMATE.start_main_~k~0#1| .cse0))) 0) (< (+ .cse1 1) |c_ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:57:25,510 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_64| Int)) (or (= (let ((.cse0 (+ (+ (+ (+ (+ (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| 1) 1) 1) 1) 1) 1))) (+ (- (* .cse0 .cse0)) (* .cse0 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_64|))) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| 2)) 4) 0)))) is different from true [2023-02-18 03:57:31,533 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_64| Int)) (or (= (let ((.cse0 (+ (+ (+ (+ (+ (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| 1) 1) 1) 1) 1) 1))) (+ (- (* .cse0 .cse0)) (* .cse0 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_64|))) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| 2)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 03:57:33,539 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1))) (or (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (= (let ((.cse1 (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)))) (+ (- (* .cse1 .cse1)) (* .cse1 |c_ULTIMATE.start_main_~k~0#1|))) 0) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:57:35,567 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|) (= (let ((.cse1 (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1))) (+ (* .cse1 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0))) is different from false [2023-02-18 03:58:01,163 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (let ((.cse0 (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1))) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (not (< .cse0 |ULTIMATE.start_main_~k~0#1|)) (< (+ .cse0 1) |ULTIMATE.start_main_~k~0#1|) (= (let ((.cse1 (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1))) (+ (* .cse1 |ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0))))) is different from false [2023-02-18 03:58:01,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:58:01,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448322186] [2023-02-18 03:58:01,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:58:01,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811085501] [2023-02-18 03:58:01,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811085501] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:58:01,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:58:01,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-18 03:58:01,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031136731] [2023-02-18 03:58:01,168 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:58:01,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 03:58:01,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:58:01,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 03:58:01,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=677, Unknown=6, NotChecked=354, Total=1190 [2023-02-18 03:58:01,169 INFO L87 Difference]: Start difference. First operand 185 states and 196 transitions. Second operand has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 03:58:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:58:01,556 INFO L93 Difference]: Finished difference Result 190 states and 200 transitions. [2023-02-18 03:58:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 03:58:01,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 102 [2023-02-18 03:58:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:58:01,558 INFO L225 Difference]: With dead ends: 190 [2023-02-18 03:58:01,558 INFO L226 Difference]: Without dead ends: 185 [2023-02-18 03:58:01,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=172, Invalid=838, Unknown=6, NotChecked=390, Total=1406 [2023-02-18 03:58:01,559 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 03:58:01,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 509 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 03:58:01,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-18 03:58:01,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-02-18 03:58:01,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.079136690647482) internal successors, (150), 139 states have internal predecessors, (150), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 03:58:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 195 transitions. [2023-02-18 03:58:01,572 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 195 transitions. Word has length 102 [2023-02-18 03:58:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:58:01,572 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 195 transitions. [2023-02-18 03:58:01,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 03:58:01,572 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 195 transitions. [2023-02-18 03:58:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-18 03:58:01,575 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:58:01,575 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1] [2023-02-18 03:58:01,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-18 03:58:01,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 03:58:01,784 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:58:01,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:58:01,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1339026780, now seen corresponding path program 12 times [2023-02-18 03:58:01,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:58:01,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197670186] [2023-02-18 03:58:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:58:01,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:58:01,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:58:01,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634748880] [2023-02-18 03:58:01,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 03:58:01,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:58:01,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:58:01,791 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) [2023-02-18 03:58:01,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 03:58:02,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-18 03:58:02,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:58:02,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-18 03:58:02,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:58:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 34 proven. 340 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-18 03:58:02,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:58:02,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:58:02,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197670186] [2023-02-18 03:58:02,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:58:02,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634748880] [2023-02-18 03:58:02,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634748880] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:58:02,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:58:02,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-18 03:58:02,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070646972] [2023-02-18 03:58:02,286 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:58:02,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 03:58:02,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:58:02,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 03:58:02,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2023-02-18 03:58:02,287 INFO L87 Difference]: Start difference. First operand 185 states and 195 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 03:58:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:58:02,725 INFO L93 Difference]: Finished difference Result 190 states and 199 transitions. [2023-02-18 03:58:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 03:58:02,725 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 110 [2023-02-18 03:58:02,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:58:02,727 INFO L225 Difference]: With dead ends: 190 [2023-02-18 03:58:02,727 INFO L226 Difference]: Without dead ends: 185 [2023-02-18 03:58:02,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2023-02-18 03:58:02,727 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 03:58:02,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 575 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 03:58:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-18 03:58:02,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-02-18 03:58:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0719424460431655) internal successors, (149), 139 states have internal predecessors, (149), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 03:58:02,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 194 transitions. [2023-02-18 03:58:02,740 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 194 transitions. Word has length 110 [2023-02-18 03:58:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:58:02,740 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 194 transitions. [2023-02-18 03:58:02,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 03:58:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 194 transitions. [2023-02-18 03:58:02,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-18 03:58:02,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:58:02,742 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1] [2023-02-18 03:58:02,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 03:58:02,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:58:02,948 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:58:02,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:58:02,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1291514634, now seen corresponding path program 13 times [2023-02-18 03:58:02,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:58:02,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933209896] [2023-02-18 03:58:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:58:02,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:58:02,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:58:02,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663638504] [2023-02-18 03:58:02,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 03:58:02,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:58:02,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:58:02,959 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) [2023-02-18 03:58:02,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 03:58:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:58:03,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-18 03:58:03,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:58:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 66 proven. 365 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-02-18 03:58:03,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:58:25,806 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_73| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151|))) (or (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_73|)) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151|) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| 2)) 4) 0))))) is different from true [2023-02-18 03:58:31,834 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_73| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151|))) (or (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_73|)) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151|) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| 2)) 4) 0))))) is different from true [2023-02-18 03:58:33,839 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:58:33,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:58:33,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933209896] [2023-02-18 03:58:33,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:58:33,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663638504] [2023-02-18 03:58:33,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663638504] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:58:33,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:58:33,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-02-18 03:58:33,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197339218] [2023-02-18 03:58:33,844 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:58:33,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 03:58:33,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:58:33,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 03:58:33,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=538, Unknown=8, NotChecked=144, Total=756 [2023-02-18 03:58:33,845 INFO L87 Difference]: Start difference. First operand 185 states and 194 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 03:58:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:58:34,253 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2023-02-18 03:58:34,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 03:58:34,254 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 118 [2023-02-18 03:58:34,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:58:34,255 INFO L225 Difference]: With dead ends: 190 [2023-02-18 03:58:34,255 INFO L226 Difference]: Without dead ends: 185 [2023-02-18 03:58:34,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=86, Invalid=674, Unknown=8, NotChecked=162, Total=930 [2023-02-18 03:58:34,255 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 03:58:34,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 613 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 03:58:34,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-18 03:58:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-02-18 03:58:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.064748201438849) internal successors, (148), 139 states have internal predecessors, (148), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 03:58:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 193 transitions. [2023-02-18 03:58:34,265 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 193 transitions. Word has length 118 [2023-02-18 03:58:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:58:34,265 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 193 transitions. [2023-02-18 03:58:34,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 03:58:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 193 transitions. [2023-02-18 03:58:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-02-18 03:58:34,266 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:58:34,266 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1] [2023-02-18 03:58:34,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 03:58:34,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:58:34,472 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:58:34,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:58:34,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1948913008, now seen corresponding path program 14 times [2023-02-18 03:58:34,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:58:34,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269500970] [2023-02-18 03:58:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:58:34,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:58:34,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:58:34,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626878441] [2023-02-18 03:58:34,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 03:58:34,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:58:34,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:58:34,479 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) [2023-02-18 03:58:34,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 03:58:34,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 03:58:34,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:58:34,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-18 03:58:34,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:58:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 68 proven. 424 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-18 03:58:34,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:58:44,938 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_90| Int)) (or (= (let ((.cse0 (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| 1))) (+ (- (* .cse0 .cse0)) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_90| .cse0))) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169|)) 4) 0)))) is different from true [2023-02-18 03:58:50,976 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_90| Int)) (or (= (let ((.cse0 (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| 1))) (+ (- (* .cse0 .cse0)) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_90| .cse0))) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_169|)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 03:59:22,595 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)))) (or (= (let ((.cse0 (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1))) (+ (* .cse0 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse0 .cse0)))) 0) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)) (< (+ .cse1 1) |c_ULTIMATE.start_main_~k~0#1|))) is different from false [2023-02-18 03:59:24,606 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (= (let ((.cse0 (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1))) (+ (* .cse0 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse0 .cse0)))) 0) (< (+ 1 .cse1) |c_ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:59:38,338 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (= (let ((.cse0 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1))) (+ (- (* .cse0 .cse0)) (* |c_ULTIMATE.start_main_~k~0#1| .cse0))) 0) (< (+ .cse1 1) |c_ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:00:49,348 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse1 (+ (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1) 1))) (+ (* .cse1 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|))) is different from false [2023-02-18 04:01:32,802 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (let ((.cse1 (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1) 1) 1) 1))) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1) 1) 1) 1) 1))) (+ (* .cse0 |ULTIMATE.start_main_~k~0#1|) (- (* .cse0 .cse0)))) 0) (not (< .cse1 |ULTIMATE.start_main_~k~0#1|)) (< (+ .cse1 1) |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 04:01:32,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:01:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269500970] [2023-02-18 04:01:32,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:01:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626878441] [2023-02-18 04:01:32,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626878441] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:01:32,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:01:32,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-18 04:01:32,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114857505] [2023-02-18 04:01:32,807 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:01:32,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 04:01:32,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:01:32,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 04:01:32,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=968, Unknown=19, NotChecked=504, Total=1722 [2023-02-18 04:01:32,808 INFO L87 Difference]: Start difference. First operand 185 states and 193 transitions. Second operand has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 04:01:33,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:01:33,376 INFO L93 Difference]: Finished difference Result 190 states and 197 transitions. [2023-02-18 04:01:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 04:01:33,376 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 126 [2023-02-18 04:01:33,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:01:33,377 INFO L225 Difference]: With dead ends: 190 [2023-02-18 04:01:33,377 INFO L226 Difference]: Without dead ends: 185 [2023-02-18 04:01:33,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 172.0s TimeCoverageRelationStatistics Valid=250, Invalid=1165, Unknown=19, NotChecked=546, Total=1980 [2023-02-18 04:01:33,378 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 04:01:33,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 719 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 04:01:33,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-18 04:01:33,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-02-18 04:01:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0575539568345325) internal successors, (147), 139 states have internal predecessors, (147), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 04:01:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 192 transitions. [2023-02-18 04:01:33,390 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 192 transitions. Word has length 126 [2023-02-18 04:01:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:01:33,390 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 192 transitions. [2023-02-18 04:01:33,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 04:01:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 192 transitions. [2023-02-18 04:01:33,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-18 04:01:33,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:01:33,391 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2023-02-18 04:01:33,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 04:01:33,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:01:33,594 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:01:33,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:01:33,594 INFO L85 PathProgramCache]: Analyzing trace with hash 48456150, now seen corresponding path program 15 times [2023-02-18 04:01:33,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:01:33,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029340117] [2023-02-18 04:01:33,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:01:33,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:01:33,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:01:33,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823768341] [2023-02-18 04:01:33,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 04:01:33,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:01:33,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:01:33,609 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) [2023-02-18 04:01:33,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 04:01:33,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-02-18 04:01:33,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:01:33,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-18 04:01:33,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:01:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 55 proven. 502 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-18 04:01:35,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:01:35,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:01:35,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029340117] [2023-02-18 04:01:35,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:01:35,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823768341] [2023-02-18 04:01:35,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823768341] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:01:35,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:01:35,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-18 04:01:35,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608576740] [2023-02-18 04:01:35,671 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:01:35,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 04:01:35,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:01:35,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 04:01:35,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2023-02-18 04:01:35,672 INFO L87 Difference]: Start difference. First operand 185 states and 192 transitions. Second operand has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-18 04:01:36,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:01:36,262 INFO L93 Difference]: Finished difference Result 190 states and 196 transitions. [2023-02-18 04:01:36,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 04:01:36,264 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 134 [2023-02-18 04:01:36,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:01:36,264 INFO L225 Difference]: With dead ends: 190 [2023-02-18 04:01:36,265 INFO L226 Difference]: Without dead ends: 185 [2023-02-18 04:01:36,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2023-02-18 04:01:36,265 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 6 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 04:01:36,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 797 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 04:01:36,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-18 04:01:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-02-18 04:01:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 139 states have internal predecessors, (146), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 04:01:36,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 191 transitions. [2023-02-18 04:01:36,278 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 191 transitions. Word has length 134 [2023-02-18 04:01:36,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:01:36,280 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 191 transitions. [2023-02-18 04:01:36,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-18 04:01:36,280 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 191 transitions. [2023-02-18 04:01:36,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-18 04:01:36,281 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:01:36,281 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1] [2023-02-18 04:01:36,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 04:01:36,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:01:36,487 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:01:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:01:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1347219516, now seen corresponding path program 16 times [2023-02-18 04:01:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:01:36,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342990868] [2023-02-18 04:01:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:01:36,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:01:36,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:01:36,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053449960] [2023-02-18 04:01:36,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 04:01:36,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:01:36,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:01:36,497 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) [2023-02-18 04:01:36,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 04:01:36,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 04:01:36,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:01:36,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-18 04:01:36,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:01:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 39 proven. 587 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-18 04:01:37,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:01:37,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:01:37,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342990868] [2023-02-18 04:01:37,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:01:37,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053449960] [2023-02-18 04:01:37,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053449960] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:01:37,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:01:37,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-02-18 04:01:37,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459130986] [2023-02-18 04:01:37,319 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:01:37,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 04:01:37,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:01:37,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 04:01:37,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2023-02-18 04:01:37,320 INFO L87 Difference]: Start difference. First operand 185 states and 191 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 04:01:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:01:37,986 INFO L93 Difference]: Finished difference Result 190 states and 195 transitions. [2023-02-18 04:01:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 04:01:37,987 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 142 [2023-02-18 04:01:37,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:01:37,988 INFO L225 Difference]: With dead ends: 190 [2023-02-18 04:01:37,988 INFO L226 Difference]: Without dead ends: 185 [2023-02-18 04:01:37,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2023-02-18 04:01:37,988 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 04:01:37,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 879 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 04:01:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-18 04:01:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-02-18 04:01:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0431654676258992) internal successors, (145), 139 states have internal predecessors, (145), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 04:01:38,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 190 transitions. [2023-02-18 04:01:38,001 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 190 transitions. Word has length 142 [2023-02-18 04:01:38,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:01:38,001 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 190 transitions. [2023-02-18 04:01:38,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 04:01:38,002 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 190 transitions. [2023-02-18 04:01:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-18 04:01:38,002 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:01:38,003 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1] [2023-02-18 04:01:38,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 04:01:38,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:01:38,209 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:01:38,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:01:38,210 INFO L85 PathProgramCache]: Analyzing trace with hash 764197026, now seen corresponding path program 17 times [2023-02-18 04:01:38,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:01:38,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219384132] [2023-02-18 04:01:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:01:38,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:01:38,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:01:38,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867109898] [2023-02-18 04:01:38,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 04:01:38,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:01:38,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:01:38,217 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) [2023-02-18 04:01:38,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 04:01:39,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-02-18 04:01:39,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:01:39,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-18 04:01:39,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:01:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 62 proven. 637 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-02-18 04:01:39,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:01:39,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:01:39,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219384132] [2023-02-18 04:01:39,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:01:39,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867109898] [2023-02-18 04:01:39,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867109898] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:01:39,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:01:39,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-02-18 04:01:39,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706117102] [2023-02-18 04:01:39,492 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:01:39,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 04:01:39,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:01:39,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 04:01:39,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2023-02-18 04:01:39,493 INFO L87 Difference]: Start difference. First operand 185 states and 190 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-18 04:01:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:01:40,179 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2023-02-18 04:01:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 04:01:40,183 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 150 [2023-02-18 04:01:40,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:01:40,184 INFO L225 Difference]: With dead ends: 190 [2023-02-18 04:01:40,184 INFO L226 Difference]: Without dead ends: 185 [2023-02-18 04:01:40,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2023-02-18 04:01:40,185 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 7 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 04:01:40,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 925 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 04:01:40,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-18 04:01:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-02-18 04:01:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 04:01:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2023-02-18 04:01:40,213 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 150 [2023-02-18 04:01:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:01:40,213 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2023-02-18 04:01:40,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-18 04:01:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2023-02-18 04:01:40,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-02-18 04:01:40,221 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:01:40,222 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1] [2023-02-18 04:01:40,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-18 04:01:40,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:01:40,422 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:01:40,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:01:40,423 INFO L85 PathProgramCache]: Analyzing trace with hash -439829752, now seen corresponding path program 18 times [2023-02-18 04:01:40,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:01:40,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249325016] [2023-02-18 04:01:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:01:40,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:01:40,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:01:40,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389266792] [2023-02-18 04:01:40,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 04:01:40,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:01:40,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:01:40,431 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:01:40,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 04:01:40,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-02-18 04:01:40,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:01:40,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 89 conjunts are in the unsatisfiable core [2023-02-18 04:01:40,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:01:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 79 proven. 697 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2023-02-18 04:01:41,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:02:11,520 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_133| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| Int)) (or (= (let ((.cse0 (+ 1 (+ (+ (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| 1) 1) 1)))) (+ (- (* .cse0 .cse0)) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_133| .cse0))) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| 2)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-18 04:02:17,532 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_133| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| Int)) (or (= (let ((.cse0 (+ 1 (+ (+ (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| 1) 1) 1)))) (+ (- (* .cse0 .cse0)) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_133| .cse0))) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_263| 2)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 04:02:54,362 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1))) (or (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (= (let ((.cse1 (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)))) (+ (- (* .cse1 .cse1)) (* .cse1 |c_ULTIMATE.start_main_~k~0#1|))) 0) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:02:56,373 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|) (= (let ((.cse1 (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1))) (+ (* .cse1 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0))) is different from false [2023-02-18 04:03:42,804 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse1 (+ (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1) 1))) (+ (* .cse1 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|))) is different from false [2023-02-18 04:04:51,682 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (= 0 (let ((.cse0 (+ (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1) 1) 1) 1) 1) 1))) (+ (* |c_ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ .cse1 1) |c_ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:04:53,696 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (let ((.cse0 (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1))) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (not (< .cse0 |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse1 (+ 1 (+ (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1) 1) 1) 1) 1) 1)))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse1) (- (* .cse1 .cse1)))) 0) (< (+ .cse0 1) |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 04:04:53,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:04:53,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249325016] [2023-02-18 04:04:53,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:04:53,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389266792] [2023-02-18 04:04:53,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389266792] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:04:53,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:04:53,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-02-18 04:04:53,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494610425] [2023-02-18 04:04:53,701 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:04:53,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 04:04:53,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:04:53,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 04:04:53,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1329, Unknown=20, NotChecked=588, Total=2256 [2023-02-18 04:04:53,703 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 04:04:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:04:56,511 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2023-02-18 04:04:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 04:04:56,511 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 158 [2023-02-18 04:04:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:04:56,512 INFO L225 Difference]: With dead ends: 190 [2023-02-18 04:04:56,512 INFO L226 Difference]: Without dead ends: 185 [2023-02-18 04:04:56,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 188.7s TimeCoverageRelationStatistics Valid=338, Invalid=1561, Unknown=21, NotChecked=630, Total=2550 [2023-02-18 04:04:56,513 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 04:04:56,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1013 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 04:04:56,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-18 04:04:56,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-02-18 04:04:56,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 04:04:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2023-02-18 04:04:56,525 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 158 [2023-02-18 04:04:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:04:56,525 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2023-02-18 04:04:56,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 04:04:56,526 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2023-02-18 04:04:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-02-18 04:04:56,530 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:04:56,530 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1] [2023-02-18 04:04:56,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-02-18 04:04:56,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-18 04:04:56,737 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:04:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:04:56,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1042741102, now seen corresponding path program 19 times [2023-02-18 04:04:56,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:04:56,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527746565] [2023-02-18 04:04:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:04:56,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:04:56,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:04:56,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62810095] [2023-02-18 04:04:56,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 04:04:56,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:04:56,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:04:56,745 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:04:56,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 04:04:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:04:57,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 93 conjunts are in the unsatisfiable core [2023-02-18 04:04:57,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:04:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 96 proven. 761 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-02-18 04:04:57,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:05:27,115 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_165| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296|))) (or (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296|)) 4) 0) (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_165|)) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-18 04:05:33,132 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_165| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296|))) (or (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296|)) 4) 0) (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_296| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_165|)) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 04:06:26,078 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (= (let ((.cse0 (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1))) (+ (* .cse0 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse0 .cse0)))) 0) (< (+ 1 .cse1) |c_ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:07:12,354 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1))) (or (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (= (let ((.cse1 (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)))) (+ (- (* .cse1 .cse1)) (* .cse1 |c_ULTIMATE.start_main_~k~0#1|))) 0) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:08:42,536 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|) (= (let ((.cse1 (+ (+ (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1) 1) 1))) (+ (* .cse1 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0))) is different from false [2023-02-18 04:09:00,211 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1) 1) 1) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (= (let ((.cse0 (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1) 1) 1) 1) 1))) (+ (* .cse0 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse0 .cse0)))) 0) (< (+ .cse1 1) |c_ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:09:39,182 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse1 (+ (+ 1 (+ (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1) 1) 1) 1) 1) 1)) 1))) (+ (* .cse1 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0))) is different from false [2023-02-18 04:10:03,299 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (let ((.cse1 (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1))) (or (= (let ((.cse0 (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1) 1) 1) 1) 1) 1)) 1) 1) 1))) (+ (- (* .cse0 .cse0)) (* |ULTIMATE.start_main_~k~0#1| .cse0))) 0) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (not (< .cse1 |ULTIMATE.start_main_~k~0#1|)) (< (+ .cse1 1) |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 04:10:03,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:10:03,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527746565] [2023-02-18 04:10:03,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:10:03,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62810095] [2023-02-18 04:10:03,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62810095] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:10:03,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:10:03,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-18 04:10:03,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326526710] [2023-02-18 04:10:03,304 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:10:03,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 04:10:03,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:10:03,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 04:10:03,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1527, Unknown=34, NotChecked=728, Total=2652 [2023-02-18 04:10:03,306 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 04:10:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:10:08,182 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2023-02-18 04:10:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 04:10:08,182 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 166 [2023-02-18 04:10:08,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:10:08,183 INFO L225 Difference]: With dead ends: 190 [2023-02-18 04:10:08,183 INFO L226 Difference]: Without dead ends: 185 [2023-02-18 04:10:08,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 304.1s TimeCoverageRelationStatistics Valid=383, Invalid=1775, Unknown=36, NotChecked=776, Total=2970 [2023-02-18 04:10:08,184 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 7 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 04:10:08,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1105 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 04:10:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-18 04:10:08,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-02-18 04:10:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 04:10:08,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2023-02-18 04:10:08,197 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 166 [2023-02-18 04:10:08,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:10:08,197 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2023-02-18 04:10:08,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 04:10:08,198 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2023-02-18 04:10:08,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-02-18 04:10:08,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:10:08,199 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1] [2023-02-18 04:10:08,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-18 04:10:08,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-18 04:10:08,405 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:10:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:10:08,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1976397268, now seen corresponding path program 20 times [2023-02-18 04:10:08,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:10:08,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360766798] [2023-02-18 04:10:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:10:08,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:10:08,412 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:10:08,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524478100] [2023-02-18 04:10:08,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 04:10:08,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:10:08,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:10:08,414 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:10:08,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 04:10:08,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 04:10:08,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:10:08,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-18 04:10:08,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:10:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 98 proven. 844 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2023-02-18 04:10:09,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:10:11,227 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:10:11,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:10:11,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360766798] [2023-02-18 04:10:11,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:10:11,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524478100] [2023-02-18 04:10:11,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524478100] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:10:11,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:10:11,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-02-18 04:10:11,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336114259] [2023-02-18 04:10:11,229 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:10:11,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 04:10:11,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:10:11,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 04:10:11,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=904, Unknown=1, NotChecked=60, Total=1056 [2023-02-18 04:10:11,230 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 04:10:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:10:12,131 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2023-02-18 04:10:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 04:10:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 174 [2023-02-18 04:10:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:10:12,133 INFO L225 Difference]: With dead ends: 190 [2023-02-18 04:10:12,133 INFO L226 Difference]: Without dead ends: 185 [2023-02-18 04:10:12,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=110, Invalid=1083, Unknown=1, NotChecked=66, Total=1260 [2023-02-18 04:10:12,134 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 7 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 04:10:12,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1201 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 04:10:12,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-18 04:10:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-02-18 04:10:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 04:10:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2023-02-18 04:10:12,147 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 174 [2023-02-18 04:10:12,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:10:12,147 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2023-02-18 04:10:12,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 04:10:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2023-02-18 04:10:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-02-18 04:10:12,148 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:10:12,148 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1] [2023-02-18 04:10:12,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 04:10:12,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 04:10:12,354 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:10:12,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:10:12,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1172446778, now seen corresponding path program 21 times [2023-02-18 04:10:12,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:10:12,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651508175] [2023-02-18 04:10:12,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:10:12,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:10:12,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:10:12,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807544791] [2023-02-18 04:10:12,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 04:10:12,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:10:12,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:10:12,377 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:10:12,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 04:10:14,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2023-02-18 04:10:14,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:10:14,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 101 conjunts are in the unsatisfiable core [2023-02-18 04:10:14,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:10:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 88 proven. 943 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-02-18 04:10:14,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:10:17,234 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1))) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (= (let ((.cse0 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1))) (+ (- (* .cse0 .cse0)) (* |c_ULTIMATE.start_main_~k~0#1| .cse0))) 0) (< (+ .cse1 1) |c_ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:10:21,251 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_367| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_215| Int)) (or (= (let ((.cse0 (+ (+ (+ (+ (+ (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_367| 1) 1) 1) 1) 1) 1))) (+ (- (* .cse0 .cse0)) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_215| .cse0))) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_367| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_367| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_367| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_367| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_367|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_367| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_367| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_367| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_367|)) 4) 0)))) is different from true