./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/egcd2-ll_unwindbound10.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 aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:58:43,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:58:43,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:58:43,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:58:43,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:58:43,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:58:43,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:58:43,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:58:43,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:58:43,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:58:43,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:58:43,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:58:43,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:58:43,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:58:43,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:58:43,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:58:43,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:58:43,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:58:43,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:58:43,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:58:43,506 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:58:43,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:58:43,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:58:43,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:58:43,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:58:43,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:58:43,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:58:43,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:58:43,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:58:43,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:58:43,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:58:43,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:58:43,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:58:43,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:58:43,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:58:43,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:58:43,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:58:43,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:58:43,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:58:43,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:58:43,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:58:43,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:58:43,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:58:43,540 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:58:43,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:58:43,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:58:43,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:58:43,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:58:43,542 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:58:43,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:58:43,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:58:43,543 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:58:43,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:58:43,543 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:58:43,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:58:43,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:58:43,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:58:43,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:58:43,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:58:43,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:58:43,545 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:58:43,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:58:43,545 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:58:43,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:58:43,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:58:43,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:58:43,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:58:43,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:58:43,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:58:43,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:58:43,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:58:43,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:58:43,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:58:43,548 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:58:43,548 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:58:43,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:58:43,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 [2022-07-22 15:58:43,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:58:43,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:58:43,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:58:43,834 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:58:43,835 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:58:43,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2022-07-22 15:58:43,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab8993a8/889ef7be87e14ababac8800571fdacea/FLAGb64b4d6eb [2022-07-22 15:58:44,355 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:58:44,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2022-07-22 15:58:44,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab8993a8/889ef7be87e14ababac8800571fdacea/FLAGb64b4d6eb [2022-07-22 15:58:44,758 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab8993a8/889ef7be87e14ababac8800571fdacea [2022-07-22 15:58:44,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:58:44,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:58:44,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:58:44,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:58:44,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:58:44,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:58:44" (1/1) ... [2022-07-22 15:58:44,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@795fdec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:44, skipping insertion in model container [2022-07-22 15:58:44,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:58:44" (1/1) ... [2022-07-22 15:58:44,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:58:44,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:58:44,928 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2022-07-22 15:58:44,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:58:44,952 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:58:44,962 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2022-07-22 15:58:44,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:58:44,986 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:58:44,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:44 WrapperNode [2022-07-22 15:58:44,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:58:44,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:58:44,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:58:44,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:58:44,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:44" (1/1) ... [2022-07-22 15:58:45,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:44" (1/1) ... [2022-07-22 15:58:45,022 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2022-07-22 15:58:45,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:58:45,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:58:45,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:58:45,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:58:45,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:44" (1/1) ... [2022-07-22 15:58:45,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:44" (1/1) ... [2022-07-22 15:58:45,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:44" (1/1) ... [2022-07-22 15:58:45,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:44" (1/1) ... [2022-07-22 15:58:45,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:44" (1/1) ... [2022-07-22 15:58:45,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:44" (1/1) ... [2022-07-22 15:58:45,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:44" (1/1) ... [2022-07-22 15:58:45,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:58:45,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:58:45,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:58:45,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:58:45,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:44" (1/1) ... [2022-07-22 15:58:45,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:58:45,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:45,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 15:58:45,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 15:58:45,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:58:45,131 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 15:58:45,131 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 15:58:45,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:58:45,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:58:45,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:58:45,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 15:58:45,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 15:58:45,184 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:58:45,185 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:58:45,306 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:58:45,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:58:45,313 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 15:58:45,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:58:45 BoogieIcfgContainer [2022-07-22 15:58:45,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:58:45,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:58:45,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:58:45,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:58:45,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:58:44" (1/3) ... [2022-07-22 15:58:45,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2a0acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:58:45, skipping insertion in model container [2022-07-22 15:58:45,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:44" (2/3) ... [2022-07-22 15:58:45,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2a0acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:58:45, skipping insertion in model container [2022-07-22 15:58:45,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:58:45" (3/3) ... [2022-07-22 15:58:45,321 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound10.c [2022-07-22 15:58:45,334 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:58:45,334 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:58:45,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:58:45,383 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@51245bb0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e4fac80 [2022-07-22 15:58:45,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:58:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 15:58:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 15:58:45,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:45,396 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:45,397 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:45,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:45,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2022-07-22 15:58:45,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:45,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115118709] [2022-07-22 15:58:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:45,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:45,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 15:58:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:45,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 15:58:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:45,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 15:58:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:45,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 15:58:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 15:58:45,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:45,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115118709] [2022-07-22 15:58:45,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115118709] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:58:45,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:58:45,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 15:58:45,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670735015] [2022-07-22 15:58:45,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:58:45,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 15:58:45,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:45,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 15:58:45,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:58:45,590 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:58:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:45,622 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2022-07-22 15:58:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 15:58:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-07-22 15:58:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:45,635 INFO L225 Difference]: With dead ends: 65 [2022-07-22 15:58:45,636 INFO L226 Difference]: Without dead ends: 30 [2022-07-22 15:58:45,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:58:45,644 INFO L413 NwaCegarLoop]: 45 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, 45 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 [2022-07-22 15:58:45,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:58:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-22 15:58:45,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-22 15:58:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-07-22 15:58:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-07-22 15:58:45,708 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2022-07-22 15:58:45,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:45,709 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-07-22 15:58:45,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:58:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-07-22 15:58:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 15:58:45,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:45,713 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:45,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:58:45,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash -455220980, now seen corresponding path program 1 times [2022-07-22 15:58:45,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:45,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535795510] [2022-07-22 15:58:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:45,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:45,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:45,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146093575] [2022-07-22 15:58:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:45,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:45,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:45,756 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:58:45,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 15:58:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:45,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 15:58:45,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 15:58:46,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:58:46,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:46,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535795510] [2022-07-22 15:58:46,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:46,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146093575] [2022-07-22 15:58:46,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146093575] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:58:46,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:58:46,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 15:58:46,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689634039] [2022-07-22 15:58:46,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:58:46,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 15:58:46,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 15:58:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 15:58:46,021 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:58:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:46,062 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-07-22 15:58:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 15:58:46,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-07-22 15:58:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:46,064 INFO L225 Difference]: With dead ends: 40 [2022-07-22 15:58:46,064 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 15:58:46,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 15:58:46,066 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:46,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:58:46,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 15:58:46,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-22 15:58:46,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 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) [2022-07-22 15:58:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-07-22 15:58:46,076 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2022-07-22 15:58:46,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:46,078 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-07-22 15:58:46,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:58:46,078 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-07-22 15:58:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 15:58:46,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:46,079 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:46,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 15:58:46,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:46,300 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:46,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1233535180, now seen corresponding path program 1 times [2022-07-22 15:58:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:46,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476375679] [2022-07-22 15:58:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:46,321 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:46,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546015007] [2022-07-22 15:58:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:46,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:46,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:46,331 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:58:46,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 15:58:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:46,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:58:46,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:58:46,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:58:46,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:46,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476375679] [2022-07-22 15:58:46,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:46,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546015007] [2022-07-22 15:58:46,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546015007] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:58:46,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:58:46,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-22 15:58:46,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024353315] [2022-07-22 15:58:46,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:58:46,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 15:58:46,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:46,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 15:58:46,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:58:46,595 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:58:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:46,731 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2022-07-22 15:58:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:58:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-07-22 15:58:46,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:46,735 INFO L225 Difference]: With dead ends: 49 [2022-07-22 15:58:46,736 INFO L226 Difference]: Without dead ends: 41 [2022-07-22 15:58:46,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:58:46,739 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:46,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 92 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:58:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-22 15:58:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-07-22 15:58:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 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) [2022-07-22 15:58:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-07-22 15:58:46,761 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 30 [2022-07-22 15:58:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:46,761 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-07-22 15:58:46,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:58:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-07-22 15:58:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 15:58:46,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:46,763 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:46,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 15:58:46,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-22 15:58:46,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:46,965 INFO L85 PathProgramCache]: Analyzing trace with hash -73118621, now seen corresponding path program 1 times [2022-07-22 15:58:46,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:46,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711934444] [2022-07-22 15:58:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:46,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:46,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:46,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51052013] [2022-07-22 15:58:46,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:46,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:46,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:46,984 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:58:46,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 15:58:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:47,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 15:58:47,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:58:47,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 15:58:47,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:47,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711934444] [2022-07-22 15:58:47,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:47,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51052013] [2022-07-22 15:58:47,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51052013] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 15:58:47,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:58:47,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 15:58:47,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491461883] [2022-07-22 15:58:47,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:58:47,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:58:47,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:47,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:58:47,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:58:47,238 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:58:47,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:47,296 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-07-22 15:58:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:58:47,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2022-07-22 15:58:47,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:47,299 INFO L225 Difference]: With dead ends: 39 [2022-07-22 15:58:47,300 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 15:58:47,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:58:47,306 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:47,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:58:47,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 15:58:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-22 15:58:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 15:58:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-07-22 15:58:47,322 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 32 [2022-07-22 15:58:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:47,322 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-07-22 15:58:47,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:58:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-07-22 15:58:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 15:58:47,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:47,324 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:47,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 15:58:47,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:47,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:47,550 INFO L85 PathProgramCache]: Analyzing trace with hash 96561445, now seen corresponding path program 1 times [2022-07-22 15:58:47,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:47,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314188291] [2022-07-22 15:58:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:47,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:47,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:47,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304195133] [2022-07-22 15:58:47,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:47,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:47,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:47,563 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:58:47,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 15:58:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:47,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 15:58:47,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 15:58:47,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:58:47,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:47,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314188291] [2022-07-22 15:58:47,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:47,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304195133] [2022-07-22 15:58:47,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304195133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:58:47,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:58:47,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 15:58:47,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908740395] [2022-07-22 15:58:47,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:58:47,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:58:47,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:47,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:58:47,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:58:47,670 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:58:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:47,702 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-07-22 15:58:47,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:58:47,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-07-22 15:58:47,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:47,704 INFO L225 Difference]: With dead ends: 62 [2022-07-22 15:58:47,704 INFO L226 Difference]: Without dead ends: 39 [2022-07-22 15:58:47,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:58:47,705 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:47,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 122 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:58:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-22 15:58:47,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-22 15:58:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 15:58:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-07-22 15:58:47,712 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 35 [2022-07-22 15:58:47,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:47,712 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-07-22 15:58:47,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:58:47,713 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-07-22 15:58:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 15:58:47,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:47,714 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:47,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 15:58:47,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:47,930 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:47,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:47,930 INFO L85 PathProgramCache]: Analyzing trace with hash 433790877, now seen corresponding path program 1 times [2022-07-22 15:58:47,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:47,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721705658] [2022-07-22 15:58:47,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:47,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:47,940 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:47,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040388749] [2022-07-22 15:58:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:47,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:47,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:47,942 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:58:47,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 15:58:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:47,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:58:47,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:58:48,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 15:58:48,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:48,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721705658] [2022-07-22 15:58:48,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:48,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040388749] [2022-07-22 15:58:48,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040388749] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 15:58:48,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:58:48,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 15:58:48,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002057615] [2022-07-22 15:58:48,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:58:48,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:58:48,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:48,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:58:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:58:48,221 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 15:58:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:48,281 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2022-07-22 15:58:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:58:48,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-07-22 15:58:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:48,283 INFO L225 Difference]: With dead ends: 53 [2022-07-22 15:58:48,283 INFO L226 Difference]: Without dead ends: 51 [2022-07-22 15:58:48,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:58:48,284 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:48,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:58:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-22 15:58:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-07-22 15:58:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 15:58:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2022-07-22 15:58:48,292 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 37 [2022-07-22 15:58:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:48,292 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2022-07-22 15:58:48,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 15:58:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2022-07-22 15:58:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 15:58:48,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:48,294 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:48,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 15:58:48,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:48,508 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:48,508 INFO L85 PathProgramCache]: Analyzing trace with hash -553232285, now seen corresponding path program 1 times [2022-07-22 15:58:48,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:48,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089479777] [2022-07-22 15:58:48,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:48,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:48,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:48,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261563628] [2022-07-22 15:58:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:48,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:48,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:48,519 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) [2022-07-22 15:58:48,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 15:58:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:48,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:58:48,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 15:58:48,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 15:58:48,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:48,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089479777] [2022-07-22 15:58:48,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:48,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261563628] [2022-07-22 15:58:48,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261563628] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 15:58:48,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:58:48,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 15:58:48,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140066880] [2022-07-22 15:58:48,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:58:48,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:58:48,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:48,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:58:48,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:58:48,817 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 15:58:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:48,872 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-07-22 15:58:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:58:48,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-07-22 15:58:48,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:48,873 INFO L225 Difference]: With dead ends: 57 [2022-07-22 15:58:48,873 INFO L226 Difference]: Without dead ends: 55 [2022-07-22 15:58:48,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:58:48,875 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:48,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:58:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-22 15:58:48,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-07-22 15:58:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 15:58:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2022-07-22 15:58:48,896 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 42 [2022-07-22 15:58:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:48,898 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2022-07-22 15:58:48,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 15:58:48,898 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2022-07-22 15:58:48,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 15:58:48,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:48,900 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:48,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 15:58:49,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:49,125 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2115683101, now seen corresponding path program 1 times [2022-07-22 15:58:49,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:49,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799440118] [2022-07-22 15:58:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:49,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:49,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:49,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743258377] [2022-07-22 15:58:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:49,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:49,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:49,145 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) [2022-07-22 15:58:49,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 15:58:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:49,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 15:58:49,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 15:58:49,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:49,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:49,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799440118] [2022-07-22 15:58:49,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:49,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743258377] [2022-07-22 15:58:49,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743258377] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:58:49,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:58:49,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-22 15:58:49,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229925658] [2022-07-22 15:58:49,618 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 15:58:49,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 15:58:49,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 15:58:49,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:58:49,619 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 15:58:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:49,756 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-07-22 15:58:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 15:58:49,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-07-22 15:58:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:49,757 INFO L225 Difference]: With dead ends: 61 [2022-07-22 15:58:49,757 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 15:58:49,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:58:49,758 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:49,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 136 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:58:49,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 15:58:49,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-07-22 15:58:49,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 15:58:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-07-22 15:58:49,765 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 47 [2022-07-22 15:58:49,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:49,765 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-07-22 15:58:49,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 15:58:49,765 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-07-22 15:58:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 15:58:49,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:49,766 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:49,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 15:58:49,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:49,967 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:49,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:49,968 INFO L85 PathProgramCache]: Analyzing trace with hash -879665460, now seen corresponding path program 1 times [2022-07-22 15:58:49,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:49,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742989985] [2022-07-22 15:58:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:49,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:49,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:49,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981003773] [2022-07-22 15:58:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:49,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:49,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:49,979 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) [2022-07-22 15:58:49,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 15:58:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:50,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:58:50,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 15:58:50,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 15:58:50,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:50,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742989985] [2022-07-22 15:58:50,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:50,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981003773] [2022-07-22 15:58:50,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981003773] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:58:50,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:58:50,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-22 15:58:50,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651380057] [2022-07-22 15:58:50,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:58:50,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 15:58:50,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:50,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 15:58:50,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:58:50,192 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 15:58:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:50,377 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2022-07-22 15:58:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 15:58:50,378 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2022-07-22 15:58:50,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:50,384 INFO L225 Difference]: With dead ends: 211 [2022-07-22 15:58:50,384 INFO L226 Difference]: Without dead ends: 203 [2022-07-22 15:58:50,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:58:50,388 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 97 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:50,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 264 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:58:50,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-22 15:58:50,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2022-07-22 15:58:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-07-22 15:58:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2022-07-22 15:58:50,424 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2022-07-22 15:58:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:50,426 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2022-07-22 15:58:50,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 15:58:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2022-07-22 15:58:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 15:58:50,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:50,429 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:50,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 15:58:50,645 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,SelfDestructingSolverStorable8 [2022-07-22 15:58:50,645 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:50,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1506412172, now seen corresponding path program 1 times [2022-07-22 15:58:50,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:50,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670309709] [2022-07-22 15:58:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:50,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:50,657 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:50,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75303784] [2022-07-22 15:58:50,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:50,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:50,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:50,659 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) [2022-07-22 15:58:50,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 15:58:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:50,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 15:58:50,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 15:58:50,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 15:58:50,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:50,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670309709] [2022-07-22 15:58:50,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:50,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75303784] [2022-07-22 15:58:50,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75303784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:58:50,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:58:50,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-22 15:58:50,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854031131] [2022-07-22 15:58:50,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:58:50,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 15:58:50,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:50,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 15:58:50,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:58:50,833 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 15:58:51,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:51,073 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2022-07-22 15:58:51,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 15:58:51,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2022-07-22 15:58:51,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:51,076 INFO L225 Difference]: With dead ends: 279 [2022-07-22 15:58:51,076 INFO L226 Difference]: Without dead ends: 259 [2022-07-22 15:58:51,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-07-22 15:58:51,077 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 62 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:51,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 334 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:58:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-07-22 15:58:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2022-07-22 15:58:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-22 15:58:51,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2022-07-22 15:58:51,099 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2022-07-22 15:58:51,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:51,100 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2022-07-22 15:58:51,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 15:58:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2022-07-22 15:58:51,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 15:58:51,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:51,101 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:51,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 15:58:51,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 15:58:51,315 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:51,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1869160295, now seen corresponding path program 1 times [2022-07-22 15:58:51,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:51,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050175929] [2022-07-22 15:58:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:51,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:51,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:51,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195131005] [2022-07-22 15:58:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:51,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:51,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:51,327 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) [2022-07-22 15:58:51,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 15:58:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:51,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:58:51,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 15:58:51,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 15:58:51,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:51,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050175929] [2022-07-22 15:58:51,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:51,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195131005] [2022-07-22 15:58:51,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195131005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:58:51,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:58:51,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-22 15:58:51,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166668919] [2022-07-22 15:58:51,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:58:51,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 15:58:51,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:51,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 15:58:51,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:58:51,530 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 15:58:51,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:51,681 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2022-07-22 15:58:51,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 15:58:51,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 59 [2022-07-22 15:58:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:51,685 INFO L225 Difference]: With dead ends: 344 [2022-07-22 15:58:51,685 INFO L226 Difference]: Without dead ends: 248 [2022-07-22 15:58:51,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:58:51,688 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 77 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:51,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 188 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:58:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-07-22 15:58:51,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2022-07-22 15:58:51,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-22 15:58:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2022-07-22 15:58:51,712 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2022-07-22 15:58:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:51,712 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2022-07-22 15:58:51,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 15:58:51,713 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2022-07-22 15:58:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 15:58:51,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:51,713 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:51,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-22 15:58:51,927 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,SelfDestructingSolverStorable10 [2022-07-22 15:58:51,927 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash 991223133, now seen corresponding path program 1 times [2022-07-22 15:58:51,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:51,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634891070] [2022-07-22 15:58:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:51,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:51,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:51,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353526545] [2022-07-22 15:58:51,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:51,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:51,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:51,937 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) [2022-07-22 15:58:51,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 15:58:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:51,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 15:58:51,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-22 15:58:52,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-22 15:58:52,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:52,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634891070] [2022-07-22 15:58:52,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:52,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353526545] [2022-07-22 15:58:52,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353526545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:58:52,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:58:52,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-07-22 15:58:52,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423171798] [2022-07-22 15:58:52,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:58:52,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 15:58:52,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:52,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 15:58:52,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 15:58:52,270 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-22 15:58:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:52,681 INFO L93 Difference]: Finished difference Result 330 states and 429 transitions. [2022-07-22 15:58:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 15:58:52,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 64 [2022-07-22 15:58:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:52,685 INFO L225 Difference]: With dead ends: 330 [2022-07-22 15:58:52,685 INFO L226 Difference]: Without dead ends: 324 [2022-07-22 15:58:52,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-22 15:58:52,686 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 40 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:52,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 286 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:58:52,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-07-22 15:58:52,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2022-07-22 15:58:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 203 states have internal predecessors, (232), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-07-22 15:58:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2022-07-22 15:58:52,730 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 64 [2022-07-22 15:58:52,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:52,731 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2022-07-22 15:58:52,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-22 15:58:52,731 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2022-07-22 15:58:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 15:58:52,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:52,732 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:52,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 15:58:52,943 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,SelfDestructingSolverStorable11 [2022-07-22 15:58:52,943 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:52,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:52,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1694315171, now seen corresponding path program 2 times [2022-07-22 15:58:52,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:52,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116069884] [2022-07-22 15:58:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:52,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:52,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:52,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011329038] [2022-07-22 15:58:52,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:58:52,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:52,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:52,966 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) [2022-07-22 15:58:52,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 15:58:53,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:58:53,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:58:53,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 15:58:53,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 15:58:53,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:53,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:53,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116069884] [2022-07-22 15:58:53,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:53,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011329038] [2022-07-22 15:58:53,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011329038] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:58:53,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:58:53,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-22 15:58:53,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806160826] [2022-07-22 15:58:53,668 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 15:58:53,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 15:58:53,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:53,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 15:58:53,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-22 15:58:53,669 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-22 15:58:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:54,142 INFO L93 Difference]: Finished difference Result 315 states and 393 transitions. [2022-07-22 15:58:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 15:58:54,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 69 [2022-07-22 15:58:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:54,144 INFO L225 Difference]: With dead ends: 315 [2022-07-22 15:58:54,144 INFO L226 Difference]: Without dead ends: 313 [2022-07-22 15:58:54,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-07-22 15:58:54,145 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 49 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:54,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 245 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:58:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-07-22 15:58:54,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2022-07-22 15:58:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 215 states have internal predecessors, (246), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-07-22 15:58:54,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 388 transitions. [2022-07-22 15:58:54,172 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 388 transitions. Word has length 69 [2022-07-22 15:58:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:54,173 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 388 transitions. [2022-07-22 15:58:54,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-22 15:58:54,173 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 388 transitions. [2022-07-22 15:58:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-22 15:58:54,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:54,174 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:54,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 15:58:54,399 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,SelfDestructingSolverStorable12 [2022-07-22 15:58:54,399 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:54,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1349365539, now seen corresponding path program 3 times [2022-07-22 15:58:54,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:54,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534520998] [2022-07-22 15:58:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:54,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:54,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:54,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123360543] [2022-07-22 15:58:54,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:58:54,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:54,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:54,417 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) [2022-07-22 15:58:54,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 15:58:54,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 15:58:54,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:58:54,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-22 15:58:54,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 36 proven. 26 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-22 15:58:55,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 36 proven. 17 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 15:59:06,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:06,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534520998] [2022-07-22 15:59:06,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:06,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123360543] [2022-07-22 15:59:06,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123360543] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:59:06,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:59:06,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2022-07-22 15:59:06,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429723391] [2022-07-22 15:59:06,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:06,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 15:59:06,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 15:59:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-07-22 15:59:06,581 INFO L87 Difference]: Start difference. First operand 310 states and 388 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-22 15:59:08,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:59:12,228 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:59:18,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:59:27,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:59:31,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:59:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:31,402 INFO L93 Difference]: Finished difference Result 427 states and 568 transitions. [2022-07-22 15:59:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 15:59:31,402 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) Word has length 74 [2022-07-22 15:59:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:31,405 INFO L225 Difference]: With dead ends: 427 [2022-07-22 15:59:31,405 INFO L226 Difference]: Without dead ends: 423 [2022-07-22 15:59:31,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=289, Invalid=970, Unknown=1, NotChecked=0, Total=1260 [2022-07-22 15:59:31,406 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 183 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 163 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:31,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 253 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 733 Invalid, 5 Unknown, 0 Unchecked, 14.6s Time] [2022-07-22 15:59:31,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-22 15:59:31,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 388. [2022-07-22 15:59:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 254 states have (on average 1.2283464566929134) internal successors, (312), 264 states have internal predecessors, (312), 101 states have call successors, (101), 33 states have call predecessors, (101), 32 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-07-22 15:59:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 510 transitions. [2022-07-22 15:59:31,475 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 510 transitions. Word has length 74 [2022-07-22 15:59:31,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:31,475 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 510 transitions. [2022-07-22 15:59:31,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-22 15:59:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 510 transitions. [2022-07-22 15:59:31,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-22 15:59:31,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:31,476 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:59:31,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:31,699 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,SelfDestructingSolverStorable13 [2022-07-22 15:59:31,699 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:31,700 INFO L85 PathProgramCache]: Analyzing trace with hash -484140586, now seen corresponding path program 1 times [2022-07-22 15:59:31,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:31,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998917502] [2022-07-22 15:59:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:31,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:31,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:31,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303013731] [2022-07-22 15:59:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:31,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:31,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:31,708 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) [2022-07-22 15:59:31,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 15:59:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:59:31,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 15:59:31,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-22 15:59:32,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-22 15:59:32,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:32,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998917502] [2022-07-22 15:59:32,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:32,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303013731] [2022-07-22 15:59:32,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303013731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:59:32,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:59:32,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-22 15:59:32,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456025864] [2022-07-22 15:59:32,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:32,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 15:59:32,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:32,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 15:59:32,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-22 15:59:32,615 INFO L87 Difference]: Start difference. First operand 388 states and 510 transitions. Second operand has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-22 15:59:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:36,093 INFO L93 Difference]: Finished difference Result 450 states and 597 transitions. [2022-07-22 15:59:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 15:59:36,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 80 [2022-07-22 15:59:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:36,096 INFO L225 Difference]: With dead ends: 450 [2022-07-22 15:59:36,096 INFO L226 Difference]: Without dead ends: 439 [2022-07-22 15:59:36,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 15:59:36,097 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 94 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:36,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 388 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 15:59:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-22 15:59:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 429. [2022-07-22 15:59:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 284 states have (on average 1.2288732394366197) internal successors, (349), 292 states have internal predecessors, (349), 111 states have call successors, (111), 33 states have call predecessors, (111), 33 states have return successors, (109), 103 states have call predecessors, (109), 109 states have call successors, (109) [2022-07-22 15:59:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 569 transitions. [2022-07-22 15:59:36,182 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 569 transitions. Word has length 80 [2022-07-22 15:59:36,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:36,182 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 569 transitions. [2022-07-22 15:59:36,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-22 15:59:36,182 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 569 transitions. [2022-07-22 15:59:36,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-22 15:59:36,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:36,183 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:59:36,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:36,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:36,401 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:36,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:36,402 INFO L85 PathProgramCache]: Analyzing trace with hash 164622435, now seen corresponding path program 4 times [2022-07-22 15:59:36,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:36,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052395845] [2022-07-22 15:59:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:36,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:36,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:36,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026642278] [2022-07-22 15:59:36,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:59:36,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:36,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:36,417 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) [2022-07-22 15:59:36,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 15:59:36,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:59:36,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:59:36,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 15:59:36,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-22 15:59:36,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:59:36,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:36,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052395845] [2022-07-22 15:59:36,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:36,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026642278] [2022-07-22 15:59:36,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026642278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:59:36,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:59:36,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 15:59:36,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126937552] [2022-07-22 15:59:36,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:59:36,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:59:36,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:36,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:59:36,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:59:36,492 INFO L87 Difference]: Start difference. First operand 429 states and 569 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-22 15:59:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:36,657 INFO L93 Difference]: Finished difference Result 656 states and 926 transitions. [2022-07-22 15:59:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:59:36,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 96 [2022-07-22 15:59:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:36,661 INFO L225 Difference]: With dead ends: 656 [2022-07-22 15:59:36,661 INFO L226 Difference]: Without dead ends: 491 [2022-07-22 15:59:36,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:59:36,662 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:36,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 163 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:59:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-07-22 15:59:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 456. [2022-07-22 15:59:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 301 states have (on average 1.2425249169435215) internal successors, (374), 309 states have internal predecessors, (374), 121 states have call successors, (121), 33 states have call predecessors, (121), 33 states have return successors, (119), 113 states have call predecessors, (119), 119 states have call successors, (119) [2022-07-22 15:59:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 614 transitions. [2022-07-22 15:59:36,772 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 614 transitions. Word has length 96 [2022-07-22 15:59:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:36,772 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 614 transitions. [2022-07-22 15:59:36,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-22 15:59:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 614 transitions. [2022-07-22 15:59:36,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 15:59:36,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:36,775 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:59:36,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:36,979 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,SelfDestructingSolverStorable15 [2022-07-22 15:59:36,980 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:36,980 INFO L85 PathProgramCache]: Analyzing trace with hash -245423741, now seen corresponding path program 1 times [2022-07-22 15:59:36,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:36,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598247355] [2022-07-22 15:59:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:36,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:36,991 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:36,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797613764] [2022-07-22 15:59:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:36,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:36,992 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) [2022-07-22 15:59:36,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 15:59:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:59:37,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:59:37,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-22 15:59:37,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-07-22 15:59:37,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:37,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598247355] [2022-07-22 15:59:37,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:37,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797613764] [2022-07-22 15:59:37,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797613764] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:59:37,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:59:37,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-07-22 15:59:37,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095662026] [2022-07-22 15:59:37,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:37,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 15:59:37,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:37,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 15:59:37,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:59:37,281 INFO L87 Difference]: Start difference. First operand 456 states and 614 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2022-07-22 15:59:37,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:37,677 INFO L93 Difference]: Finished difference Result 1062 states and 1468 transitions. [2022-07-22 15:59:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 15:59:37,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) Word has length 112 [2022-07-22 15:59:37,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:37,682 INFO L225 Difference]: With dead ends: 1062 [2022-07-22 15:59:37,682 INFO L226 Difference]: Without dead ends: 849 [2022-07-22 15:59:37,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2022-07-22 15:59:37,684 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 134 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:37,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 348 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:59:37,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-07-22 15:59:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 833. [2022-07-22 15:59:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 535 states have (on average 1.2018691588785047) internal successors, (643), 548 states have internal predecessors, (643), 228 states have call successors, (228), 69 states have call predecessors, (228), 69 states have return successors, (223), 215 states have call predecessors, (223), 223 states have call successors, (223) [2022-07-22 15:59:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1094 transitions. [2022-07-22 15:59:37,873 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1094 transitions. Word has length 112 [2022-07-22 15:59:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:37,873 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 1094 transitions. [2022-07-22 15:59:37,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2022-07-22 15:59:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1094 transitions. [2022-07-22 15:59:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-22 15:59:37,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:37,875 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:59:37,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:38,095 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,SelfDestructingSolverStorable16 [2022-07-22 15:59:38,095 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1897577373, now seen corresponding path program 1 times [2022-07-22 15:59:38,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:38,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585197537] [2022-07-22 15:59:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:38,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:38,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:38,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793979618] [2022-07-22 15:59:38,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:38,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:38,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:38,106 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) [2022-07-22 15:59:38,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 15:59:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:59:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-22 15:59:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 99 proven. 88 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-07-22 15:59:38,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:40,929 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1| (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (.cse0 (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|))))) (.cse2 (+ (* (- 1) |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|)) (.cse3 (= |c_ULTIMATE.start_main_~p~0#1| 0))) (and (let ((.cse1 (div .cse4 |c_ULTIMATE.start_main_~p~0#1|))) (or (= |c_ULTIMATE.start_main_~c~0#1| (+ .cse0 (* .cse1 .cse2))) (not (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* .cse1 |c_ULTIMATE.start_main_~q~0#1|)) |c_ULTIMATE.start_main_~b~0#1|)) .cse3 (not (= (mod .cse4 |c_ULTIMATE.start_main_~p~0#1|) 0)))) (or (not (= .cse4 0)) (let ((.cse6 (= 0 |c_ULTIMATE.start_main_~q~0#1|)) (.cse5 (+ |c_ULTIMATE.start_main_~b~0#1| (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)))) (and (or (not (= .cse5 0)) (forall ((|ULTIMATE.start_main_~x~0#1| Int)) (= |c_ULTIMATE.start_main_~c~0#1| (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (* (+ (* (- 1) |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~x~0#1|)))) (not .cse6)) (or .cse6 (not (= (mod .cse5 |c_ULTIMATE.start_main_~q~0#1|) 0)) (= |c_ULTIMATE.start_main_~c~0#1| (+ .cse0 (* .cse2 (div .cse5 |c_ULTIMATE.start_main_~q~0#1|))))))) (not .cse3)))) is different from true [2022-07-22 15:59:40,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:40,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585197537] [2022-07-22 15:59:40,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:40,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793979618] [2022-07-22 15:59:40,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793979618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:59:40,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:59:40,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-22 15:59:40,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573853138] [2022-07-22 15:59:40,931 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:40,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 15:59:40,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:40,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 15:59:40,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=251, Unknown=1, NotChecked=32, Total=342 [2022-07-22 15:59:40,932 INFO L87 Difference]: Start difference. First operand 833 states and 1094 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-22 15:59:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:41,693 INFO L93 Difference]: Finished difference Result 878 states and 1150 transitions. [2022-07-22 15:59:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 15:59:41,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 115 [2022-07-22 15:59:41,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:41,698 INFO L225 Difference]: With dead ends: 878 [2022-07-22 15:59:41,698 INFO L226 Difference]: Without dead ends: 876 [2022-07-22 15:59:41,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=81, Invalid=342, Unknown=1, NotChecked=38, Total=462 [2022-07-22 15:59:41,699 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 28 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:41,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 370 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 15:59:41,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-07-22 15:59:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 872. [2022-07-22 15:59:41,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 558 states have (on average 1.1989247311827957) internal successors, (669), 571 states have internal predecessors, (669), 240 states have call successors, (240), 73 states have call predecessors, (240), 73 states have return successors, (235), 227 states have call predecessors, (235), 235 states have call successors, (235) [2022-07-22 15:59:41,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1144 transitions. [2022-07-22 15:59:41,910 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1144 transitions. Word has length 115 [2022-07-22 15:59:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:41,911 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1144 transitions. [2022-07-22 15:59:41,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-22 15:59:41,912 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1144 transitions. [2022-07-22 15:59:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-22 15:59:41,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:41,914 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:59:41,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:42,142 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,SelfDestructingSolverStorable17 [2022-07-22 15:59:42,142 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:42,143 INFO L85 PathProgramCache]: Analyzing trace with hash 364386885, now seen corresponding path program 2 times [2022-07-22 15:59:42,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:42,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391398188] [2022-07-22 15:59:42,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:42,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:42,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:42,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426554797] [2022-07-22 15:59:42,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:59:42,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:42,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:42,160 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) [2022-07-22 15:59:42,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 15:59:42,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:59:42,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:59:42,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-22 15:59:42,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 106 proven. 112 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-07-22 15:59:42,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 134 proven. 23 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-07-22 15:59:43,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:43,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391398188] [2022-07-22 15:59:43,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:43,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426554797] [2022-07-22 15:59:43,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426554797] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:59:43,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:59:43,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-07-22 15:59:43,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136843591] [2022-07-22 15:59:43,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:43,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 15:59:43,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:43,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 15:59:43,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-07-22 15:59:43,351 INFO L87 Difference]: Start difference. First operand 872 states and 1144 transitions. Second operand has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) [2022-07-22 15:59:44,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:59:46,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:46,285 INFO L93 Difference]: Finished difference Result 965 states and 1235 transitions. [2022-07-22 15:59:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 15:59:46,286 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) Word has length 119 [2022-07-22 15:59:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:46,290 INFO L225 Difference]: With dead ends: 965 [2022-07-22 15:59:46,290 INFO L226 Difference]: Without dead ends: 961 [2022-07-22 15:59:46,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-07-22 15:59:46,291 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 99 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:46,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 327 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 15:59:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-07-22 15:59:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 955. [2022-07-22 15:59:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 616 states have (on average 1.1834415584415585) internal successors, (729), 628 states have internal predecessors, (729), 249 states have call successors, (249), 90 states have call predecessors, (249), 89 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2022-07-22 15:59:46,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1222 transitions. [2022-07-22 15:59:46,510 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1222 transitions. Word has length 119 [2022-07-22 15:59:46,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:46,511 INFO L495 AbstractCegarLoop]: Abstraction has 955 states and 1222 transitions. [2022-07-22 15:59:46,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) [2022-07-22 15:59:46,511 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1222 transitions. [2022-07-22 15:59:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-22 15:59:46,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:46,514 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:59:46,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:46,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:46,728 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1036292276, now seen corresponding path program 1 times [2022-07-22 15:59:46,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:46,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997457766] [2022-07-22 15:59:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:46,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:46,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:46,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633521110] [2022-07-22 15:59:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:46,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:46,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:46,741 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) [2022-07-22 15:59:46,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 15:59:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:59:46,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:59:46,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-22 15:59:46,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-07-22 15:59:47,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:47,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997457766] [2022-07-22 15:59:47,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:47,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633521110] [2022-07-22 15:59:47,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633521110] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:59:47,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:59:47,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-07-22 15:59:47,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782873147] [2022-07-22 15:59:47,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:47,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 15:59:47,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:47,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 15:59:47,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:59:47,087 INFO L87 Difference]: Start difference. First operand 955 states and 1222 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2022-07-22 15:59:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:47,528 INFO L93 Difference]: Finished difference Result 993 states and 1260 transitions. [2022-07-22 15:59:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 15:59:47,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 129 [2022-07-22 15:59:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:47,533 INFO L225 Difference]: With dead ends: 993 [2022-07-22 15:59:47,533 INFO L226 Difference]: Without dead ends: 973 [2022-07-22 15:59:47,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2022-07-22 15:59:47,535 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 101 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:47,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 316 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:59:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-07-22 15:59:47,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 967. [2022-07-22 15:59:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 628 states have (on average 1.164012738853503) internal successors, (731), 640 states have internal predecessors, (731), 249 states have call successors, (249), 90 states have call predecessors, (249), 89 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2022-07-22 15:59:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1224 transitions. [2022-07-22 15:59:47,767 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1224 transitions. Word has length 129 [2022-07-22 15:59:47,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:47,768 INFO L495 AbstractCegarLoop]: Abstraction has 967 states and 1224 transitions. [2022-07-22 15:59:47,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2022-07-22 15:59:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1224 transitions. [2022-07-22 15:59:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-22 15:59:47,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:47,770 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:59:47,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:47,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:47,983 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2066876172, now seen corresponding path program 2 times [2022-07-22 15:59:47,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:47,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096259990] [2022-07-22 15:59:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:47,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:47,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:47,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940609966] [2022-07-22 15:59:47,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:59:47,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:47,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:47,999 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) [2022-07-22 15:59:48,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 15:59:48,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:59:48,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:59:48,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-22 15:59:48,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 147 proven. 111 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-07-22 15:59:50,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-22 15:59:51,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:51,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096259990] [2022-07-22 15:59:51,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:51,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940609966] [2022-07-22 15:59:51,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940609966] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:59:51,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:59:51,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 30 [2022-07-22 15:59:51,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767756353] [2022-07-22 15:59:51,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:51,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 15:59:51,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:51,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 15:59:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-07-22 15:59:51,975 INFO L87 Difference]: Start difference. First operand 967 states and 1224 transitions. Second operand has 30 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-07-22 16:00:13,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:00:13,134 INFO L93 Difference]: Finished difference Result 1023 states and 1285 transitions. [2022-07-22 16:00:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 16:00:13,135 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) Word has length 130 [2022-07-22 16:00:13,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:00:13,139 INFO L225 Difference]: With dead ends: 1023 [2022-07-22 16:00:13,139 INFO L226 Difference]: Without dead ends: 1003 [2022-07-22 16:00:13,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=524, Invalid=2556, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 16:00:13,141 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 137 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-07-22 16:00:13,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 656 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-07-22 16:00:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-07-22 16:00:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 888. [2022-07-22 16:00:13,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 575 states have (on average 1.1478260869565218) internal successors, (660), 586 states have internal predecessors, (660), 222 states have call successors, (222), 90 states have call predecessors, (222), 90 states have return successors, (220), 211 states have call predecessors, (220), 220 states have call successors, (220) [2022-07-22 16:00:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1102 transitions. [2022-07-22 16:00:13,331 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1102 transitions. Word has length 130 [2022-07-22 16:00:13,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:00:13,332 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1102 transitions. [2022-07-22 16:00:13,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-07-22 16:00:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1102 transitions. [2022-07-22 16:00:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-22 16:00:13,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:00:13,335 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:00:13,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 16:00:13,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-22 16:00:13,551 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:00:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:00:13,552 INFO L85 PathProgramCache]: Analyzing trace with hash 724097753, now seen corresponding path program 3 times [2022-07-22 16:00:13,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:00:13,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882150012] [2022-07-22 16:00:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:00:13,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:00:13,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:00:13,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184106715] [2022-07-22 16:00:13,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:00:13,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:00:13,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:00:13,567 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) [2022-07-22 16:00:13,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 16:00:14,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 16:00:14,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:00:14,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-22 16:00:14,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:00:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 132 proven. 86 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2022-07-22 16:00:25,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:00:57,447 WARN L855 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (let ((.cse5 (* (- 1) |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse6 (* |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|))) (let ((.cse1 (+ .cse6 |c_ULTIMATE.start_main_~s~0#1| (* (- 1) |c_ULTIMATE.start_main_~r~0#1|))) (.cse2 (+ (* (- 1) |c_ULTIMATE.start_main_~p~0#1|) (* (- 1) .cse5) |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~y~0#1| .cse1) (* |c_ULTIMATE.start_main_~x~0#1| .cse2)))) (or (not (= (+ (* |c_ULTIMATE.start_main_~c~0#1| (- 1)) |c_ULTIMATE.start_main_~b~0#1|) .cse0)) (= (+ (* (- 1) (* |c_ULTIMATE.start_main_~y~0#1| .cse0)) (* .cse1 |c_ULTIMATE.start_main_~yy~0#1|) (* |c_ULTIMATE.start_main_~xy~0#1| .cse2)) 0) (<= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (not (let ((.cse3 (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) .cse6))) (.cse4 (+ .cse5 |c_ULTIMATE.start_main_~p~0#1|))) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~yy~0#1| .cse3) (* |c_ULTIMATE.start_main_~xy~0#1| .cse4)) (+ (* |c_ULTIMATE.start_main_~y~0#1| .cse3) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| .cse4)))))))))) is different from true [2022-07-22 16:01:01,628 WARN L855 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (let ((.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (* (- 1) |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse13 (* |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|))) (or (<= (+ |c_ULTIMATE.start_main_~b~0#1| (* 2 .cse0) (* 2 .cse1)) (+ (* .cse2 2) (* 2 .cse3) (* .cse4 2) (* 2 .cse5))) (<= (+ .cse2 .cse4 .cse5 .cse3) (+ .cse0 .cse1)) (not (let ((.cse6 (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse8 (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse10 (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse11 (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse7 (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) .cse13))) (.cse9 (+ .cse12 |c_ULTIMATE.start_main_~p~0#1|))) (= (+ .cse6 (* |c_ULTIMATE.start_main_~yy~0#1| .cse7) .cse8 (* |c_ULTIMATE.start_main_~xy~0#1| .cse9) .cse0 .cse1 .cse10 |c_ULTIMATE.start_main_~b~0#1| .cse11) (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ .cse6 .cse8 .cse0 .cse1 .cse10 |c_ULTIMATE.start_main_~b~0#1| .cse11)) (* |c_ULTIMATE.start_main_~y~0#1| .cse7) (* |c_ULTIMATE.start_main_~x~0#1| .cse9))))) (= (let ((.cse14 (+ .cse13 |c_ULTIMATE.start_main_~s~0#1| (* (- 1) |c_ULTIMATE.start_main_~r~0#1|))) (.cse15 (+ (* (- 1) |c_ULTIMATE.start_main_~p~0#1|) (* (- 1) .cse12) |c_ULTIMATE.start_main_~q~0#1|))) (+ (* (- 1) (* |c_ULTIMATE.start_main_~y~0#1| (+ (* |c_ULTIMATE.start_main_~y~0#1| .cse14) (* |c_ULTIMATE.start_main_~x~0#1| .cse15)))) (* .cse14 |c_ULTIMATE.start_main_~yy~0#1|) (* |c_ULTIMATE.start_main_~xy~0#1| .cse15))) 0)))) is different from true [2022-07-22 16:01:04,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:01:04,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882150012] [2022-07-22 16:01:04,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:01:04,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184106715] [2022-07-22 16:01:04,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184106715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:01:04,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:01:04,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-22 16:01:04,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169698661] [2022-07-22 16:01:04,829 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:01:04,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 16:01:04,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:01:04,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 16:01:04,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=522, Unknown=3, NotChecked=98, Total=756 [2022-07-22 16:01:04,830 INFO L87 Difference]: Start difference. First operand 888 states and 1102 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-07-22 16:01:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:01:23,249 INFO L93 Difference]: Finished difference Result 1115 states and 1357 transitions. [2022-07-22 16:01:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 16:01:23,251 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 147 [2022-07-22 16:01:23,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:01:23,256 INFO L225 Difference]: With dead ends: 1115 [2022-07-22 16:01:23,256 INFO L226 Difference]: Without dead ends: 1113 [2022-07-22 16:01:23,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=202, Invalid=859, Unknown=3, NotChecked=126, Total=1190 [2022-07-22 16:01:23,258 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 59 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-07-22 16:01:23,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 468 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2022-07-22 16:01:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-07-22 16:01:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1100. [2022-07-22 16:01:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 721 states have (on average 1.1345353675450762) internal successors, (818), 731 states have internal predecessors, (818), 262 states have call successors, (262), 116 states have call predecessors, (262), 116 states have return successors, (260), 252 states have call predecessors, (260), 260 states have call successors, (260) [2022-07-22 16:01:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1340 transitions. [2022-07-22 16:01:23,486 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1340 transitions. Word has length 147 [2022-07-22 16:01:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:01:23,487 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1340 transitions. [2022-07-22 16:01:23,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-07-22 16:01:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1340 transitions. [2022-07-22 16:01:23,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-07-22 16:01:23,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:01:23,489 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:01:23,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 16:01:23,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-22 16:01:23,697 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:01:23,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:01:23,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1547189055, now seen corresponding path program 4 times [2022-07-22 16:01:23,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:01:23,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377407255] [2022-07-22 16:01:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:01:23,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:01:23,711 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:01:23,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538836167] [2022-07-22 16:01:23,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:01:23,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:01:23,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:01:23,713 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) [2022-07-22 16:01:23,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 16:01:24,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:01:24,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:01:24,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-22 16:01:24,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:01:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 237 proven. 156 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2022-07-22 16:01:27,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:44,372 WARN L233 SmtUtils]: Spent 10.35s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)