./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/egcd3-ll_valuebound50.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 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 04:44:59,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 04:44:59,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 04:44:59,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 04:44:59,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 04:44:59,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 04:44:59,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 04:44:59,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 04:44:59,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 04:44:59,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 04:44:59,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 04:44:59,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 04:44:59,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 04:44:59,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 04:44:59,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 04:44:59,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 04:44:59,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 04:44:59,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 04:44:59,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 04:44:59,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 04:44:59,751 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 04:44:59,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 04:44:59,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 04:44:59,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 04:44:59,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 04:44:59,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 04:44:59,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 04:44:59,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 04:44:59,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 04:44:59,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 04:44:59,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 04:44:59,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 04:44:59,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 04:44:59,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 04:44:59,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 04:44:59,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 04:44:59,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 04:44:59,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 04:44:59,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 04:44:59,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 04:44:59,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 04:44:59,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 04:44:59,773 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 04:44:59,802 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 04:44:59,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 04:44:59,803 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 04:44:59,803 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 04:44:59,804 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 04:44:59,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 04:44:59,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 04:44:59,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 04:44:59,805 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 04:44:59,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 04:44:59,806 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 04:44:59,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 04:44:59,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 04:44:59,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 04:44:59,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 04:44:59,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 04:44:59,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 04:44:59,811 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 04:44:59,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 04:44:59,812 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 04:44:59,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 04:44:59,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 04:44:59,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 04:44:59,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 04:44:59,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:44:59,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 04:44:59,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 04:44:59,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 04:44:59,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 04:44:59,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 04:44:59,815 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 04:44:59,815 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 04:44:59,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 04:44:59,815 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb [2022-07-12 04:45:00,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 04:45:00,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 04:45:00,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 04:45:00,069 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 04:45:00,070 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 04:45:00,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-07-12 04:45:00,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/898d2c846/396247ce629e4b2d8cec4cecf5d5eb6c/FLAG8a2c4f585 [2022-07-12 04:45:00,528 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 04:45:00,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-07-12 04:45:00,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/898d2c846/396247ce629e4b2d8cec4cecf5d5eb6c/FLAG8a2c4f585 [2022-07-12 04:45:00,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/898d2c846/396247ce629e4b2d8cec4cecf5d5eb6c [2022-07-12 04:45:00,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 04:45:00,932 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 04:45:00,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 04:45:00,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 04:45:00,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 04:45:00,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:45:00" (1/1) ... [2022-07-12 04:45:00,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@783d5863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:45:00, skipping insertion in model container [2022-07-12 04:45:00,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:45:00" (1/1) ... [2022-07-12 04:45:00,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 04:45:00,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 04:45:01,063 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/egcd3-ll_valuebound50.c[490,503] [2022-07-12 04:45:01,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:45:01,085 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 04:45:01,095 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/egcd3-ll_valuebound50.c[490,503] [2022-07-12 04:45:01,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:45:01,116 INFO L208 MainTranslator]: Completed translation [2022-07-12 04:45:01,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:45:01 WrapperNode [2022-07-12 04:45:01,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 04:45:01,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 04:45:01,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 04:45:01,118 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 04:45:01,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:45:01" (1/1) ... [2022-07-12 04:45:01,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:45:01" (1/1) ... [2022-07-12 04:45:01,160 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2022-07-12 04:45:01,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 04:45:01,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 04:45:01,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 04:45:01,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 04:45:01,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:45:01" (1/1) ... [2022-07-12 04:45:01,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:45:01" (1/1) ... [2022-07-12 04:45:01,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:45:01" (1/1) ... [2022-07-12 04:45:01,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:45:01" (1/1) ... [2022-07-12 04:45:01,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:45:01" (1/1) ... [2022-07-12 04:45:01,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:45:01" (1/1) ... [2022-07-12 04:45:01,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:45:01" (1/1) ... [2022-07-12 04:45:01,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 04:45:01,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 04:45:01,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 04:45:01,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 04:45:01,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:45:01" (1/1) ... [2022-07-12 04:45:01,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:45:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:01,231 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) [2022-07-12 04:45:01,233 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 [2022-07-12 04:45:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 04:45:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-12 04:45:01,264 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-12 04:45:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 04:45:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 04:45:01,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 04:45:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 04:45:01,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 04:45:01,316 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 04:45:01,319 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 04:45:01,475 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 04:45:01,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 04:45:01,481 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 04:45:01,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:45:01 BoogieIcfgContainer [2022-07-12 04:45:01,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 04:45:01,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 04:45:01,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 04:45:01,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 04:45:01,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 04:45:00" (1/3) ... [2022-07-12 04:45:01,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfa3efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:45:01, skipping insertion in model container [2022-07-12 04:45:01,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:45:01" (2/3) ... [2022-07-12 04:45:01,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfa3efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:45:01, skipping insertion in model container [2022-07-12 04:45:01,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:45:01" (3/3) ... [2022-07-12 04:45:01,499 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2022-07-12 04:45:01,513 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 04:45:01,513 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 04:45:01,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 04:45:01,581 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@73d88001, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@236699cd [2022-07-12 04:45:01,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 04:45:01,585 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-12 04:45:01,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 04:45:01,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:01,592 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] [2022-07-12 04:45:01,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:01,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:01,613 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2022-07-12 04:45:01,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:01,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664539944] [2022-07-12 04:45:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:01,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:01,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:45:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:01,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 04:45:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:01,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 04:45:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:01,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 04:45:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:45:01,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:01,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664539944] [2022-07-12 04:45:01,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664539944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:45:01,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:45:01,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 04:45:01,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198467673] [2022-07-12 04:45:01,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:45:01,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 04:45:01,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 04:45:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:45:01,841 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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), 2 states have call successors, (4) [2022-07-12 04:45:01,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:01,859 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2022-07-12 04:45:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 04:45:01,860 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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), 2 states have call successors, (4) Word has length 29 [2022-07-12 04:45:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:01,865 INFO L225 Difference]: With dead ends: 67 [2022-07-12 04:45:01,865 INFO L226 Difference]: Without dead ends: 31 [2022-07-12 04:45:01,868 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 [2022-07-12 04:45:01,871 INFO L413 NwaCegarLoop]: 44 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, 44 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 [2022-07-12 04:45:01,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:45:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-12 04:45:01,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-12 04:45:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 04:45:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-07-12 04:45:01,912 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2022-07-12 04:45:01,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:01,912 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-07-12 04:45:01,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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), 2 states have call successors, (4) [2022-07-12 04:45:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-07-12 04:45:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 04:45:01,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:01,914 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] [2022-07-12 04:45:01,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 04:45:01,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:01,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2022-07-12 04:45:01,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:01,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832958209] [2022-07-12 04:45:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:01,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:01,940 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:01,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772873201] [2022-07-12 04:45:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:01,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:01,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:01,946 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) [2022-07-12 04:45:01,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 04:45:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:02,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:45:02,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:45:02,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:45:02,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:02,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832958209] [2022-07-12 04:45:02,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:02,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772873201] [2022-07-12 04:45:02,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772873201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:45:02,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:45:02,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 04:45:02,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136344484] [2022-07-12 04:45:02,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:45:02,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 04:45:02,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:02,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 04:45:02,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:45:02,130 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:45:02,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:02,258 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-07-12 04:45:02,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:45:02,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-07-12 04:45:02,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:02,263 INFO L225 Difference]: With dead ends: 50 [2022-07-12 04:45:02,263 INFO L226 Difference]: Without dead ends: 43 [2022-07-12 04:45:02,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:45:02,269 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:02,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 113 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:45:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-12 04:45:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-07-12 04:45:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 04:45:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-07-12 04:45:02,288 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2022-07-12 04:45:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:02,289 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-07-12 04:45:02,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:45:02,290 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-07-12 04:45:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 04:45:02,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:02,291 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, 1] [2022-07-12 04:45:02,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:02,511 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 [2022-07-12 04:45:02,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2022-07-12 04:45:02,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:02,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469846103] [2022-07-12 04:45:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:02,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:02,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:02,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800436124] [2022-07-12 04:45:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:02,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:02,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:02,550 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) [2022-07-12 04:45:02,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 04:45:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:02,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:45:02,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:45:02,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:45:02,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:02,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469846103] [2022-07-12 04:45:02,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:02,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800436124] [2022-07-12 04:45:02,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800436124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:45:02,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:45:02,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:45:02,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117906947] [2022-07-12 04:45:02,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:45:02,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:45:02,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:02,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:45:02,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:45:02,672 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-07-12 04:45:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:02,710 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-07-12 04:45:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:45:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 33 [2022-07-12 04:45:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:02,712 INFO L225 Difference]: With dead ends: 49 [2022-07-12 04:45:02,712 INFO L226 Difference]: Without dead ends: 47 [2022-07-12 04:45:02,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:45:02,714 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:02,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 137 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:45:02,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-12 04:45:02,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-07-12 04:45:02,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-12 04:45:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-07-12 04:45:02,726 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2022-07-12 04:45:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:02,726 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-07-12 04:45:02,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-07-12 04:45:02,727 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-07-12 04:45:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 04:45:02,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:02,728 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] [2022-07-12 04:45:02,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:02,928 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 [2022-07-12 04:45:02,929 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:02,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:02,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2022-07-12 04:45:02,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:02,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169085849] [2022-07-12 04:45:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:02,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:02,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:02,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416324600] [2022-07-12 04:45:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:02,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:02,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:02,960 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) [2022-07-12 04:45:02,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 04:45:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:03,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:45:03,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:45:03,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:45:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:45:03,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:03,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169085849] [2022-07-12 04:45:03,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:03,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416324600] [2022-07-12 04:45:03,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416324600] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:45:03,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:45:03,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-12 04:45:03,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081090980] [2022-07-12 04:45:03,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:45:03,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 04:45:03,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:03,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 04:45:03,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:45:03,134 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:45:03,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:03,338 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2022-07-12 04:45:03,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 04:45:03,339 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-07-12 04:45:03,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:03,343 INFO L225 Difference]: With dead ends: 99 [2022-07-12 04:45:03,343 INFO L226 Difference]: Without dead ends: 92 [2022-07-12 04:45:03,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:45:03,348 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:03,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 176 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:45:03,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-12 04:45:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2022-07-12 04:45:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 04:45:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-07-12 04:45:03,374 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2022-07-12 04:45:03,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:03,383 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-07-12 04:45:03,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:45:03,383 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-07-12 04:45:03,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 04:45:03,385 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:03,385 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, 1] [2022-07-12 04:45:03,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:03,587 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 [2022-07-12 04:45:03,588 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:03,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:03,588 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2022-07-12 04:45:03,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:03,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841074102] [2022-07-12 04:45:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:03,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:03,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:03,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867088521] [2022-07-12 04:45:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:03,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:03,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:03,603 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) [2022-07-12 04:45:03,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 04:45:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:03,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:45:03,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:45:03,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:45:03,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:03,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841074102] [2022-07-12 04:45:03,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:03,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867088521] [2022-07-12 04:45:03,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867088521] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:45:03,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:45:03,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:45:03,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219952160] [2022-07-12 04:45:03,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:45:03,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:45:03,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:03,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:45:03,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:45:03,731 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-12 04:45:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:03,781 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2022-07-12 04:45:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:45:03,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 38 [2022-07-12 04:45:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:03,783 INFO L225 Difference]: With dead ends: 75 [2022-07-12 04:45:03,783 INFO L226 Difference]: Without dead ends: 73 [2022-07-12 04:45:03,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:45:03,784 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:03,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 131 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:45:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-12 04:45:03,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-07-12 04:45:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 04:45:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-07-12 04:45:03,802 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2022-07-12 04:45:03,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:03,803 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-07-12 04:45:03,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-12 04:45:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-07-12 04:45:03,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 04:45:03,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:03,810 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 04:45:03,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:04,033 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 [2022-07-12 04:45:04,033 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:04,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:04,034 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2022-07-12 04:45:04,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:04,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885531807] [2022-07-12 04:45:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:04,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:04,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:04,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277379881] [2022-07-12 04:45:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:04,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:04,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:04,047 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) [2022-07-12 04:45:04,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 04:45:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:04,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 04:45:04,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:45:04,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:45:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:45:04,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:04,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885531807] [2022-07-12 04:45:04,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:04,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277379881] [2022-07-12 04:45:04,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277379881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:45:04,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:45:04,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-07-12 04:45:04,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789439340] [2022-07-12 04:45:04,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:45:04,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:45:04,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:04,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:45:04,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:45:04,388 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:45:04,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:04,460 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2022-07-12 04:45:04,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:45:04,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2022-07-12 04:45:04,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:04,463 INFO L225 Difference]: With dead ends: 95 [2022-07-12 04:45:04,463 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 04:45:04,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:45:04,467 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:04,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 229 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-07-12 04:45:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 04:45:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2022-07-12 04:45:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 63 states have internal predecessors, (77), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-12 04:45:04,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2022-07-12 04:45:04,496 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 38 [2022-07-12 04:45:04,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:04,497 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2022-07-12 04:45:04,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:45:04,497 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2022-07-12 04:45:04,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 04:45:04,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:04,498 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, 1] [2022-07-12 04:45:04,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:04,711 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 [2022-07-12 04:45:04,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:04,712 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2022-07-12 04:45:04,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:04,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127134990] [2022-07-12 04:45:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:04,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:04,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:04,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592439532] [2022-07-12 04:45:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:04,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:04,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:04,744 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) [2022-07-12 04:45:04,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 04:45:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:04,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:45:04,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 04:45:04,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:45:04,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:04,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127134990] [2022-07-12 04:45:04,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:04,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592439532] [2022-07-12 04:45:04,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592439532] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:45:04,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:45:04,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:45:04,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51190020] [2022-07-12 04:45:04,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:45:04,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:45:04,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:04,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:45:04,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:45:04,842 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-12 04:45:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:04,898 INFO L93 Difference]: Finished difference Result 126 states and 175 transitions. [2022-07-12 04:45:04,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:45:04,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 43 [2022-07-12 04:45:04,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:04,901 INFO L225 Difference]: With dead ends: 126 [2022-07-12 04:45:04,901 INFO L226 Difference]: Without dead ends: 124 [2022-07-12 04:45:04,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:45:04,902 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 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 [2022-07-12 04:45:04,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:45:04,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-12 04:45:04,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2022-07-12 04:45:04,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 76 states have internal predecessors, (95), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-12 04:45:04,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 168 transitions. [2022-07-12 04:45:04,928 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 168 transitions. Word has length 43 [2022-07-12 04:45:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:04,930 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 168 transitions. [2022-07-12 04:45:04,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-12 04:45:04,930 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 168 transitions. [2022-07-12 04:45:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 04:45:04,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:04,932 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:45:04,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:05,147 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 [2022-07-12 04:45:05,148 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2022-07-12 04:45:05,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:05,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114956318] [2022-07-12 04:45:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:05,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:05,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:05,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419692646] [2022-07-12 04:45:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:05,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:05,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:05,171 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) [2022-07-12 04:45:05,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 04:45:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:05,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 04:45:05,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:45:05,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:45:05,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:05,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114956318] [2022-07-12 04:45:05,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:05,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419692646] [2022-07-12 04:45:05,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419692646] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:45:05,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:45:05,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-12 04:45:05,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616385144] [2022-07-12 04:45:05,413 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:45:05,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 04:45:05,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:05,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 04:45:05,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:45:05,414 INFO L87 Difference]: Start difference. First operand 119 states and 168 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-07-12 04:45:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:05,574 INFO L93 Difference]: Finished difference Result 133 states and 180 transitions. [2022-07-12 04:45:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 04:45:05,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 43 [2022-07-12 04:45:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:05,576 INFO L225 Difference]: With dead ends: 133 [2022-07-12 04:45:05,577 INFO L226 Difference]: Without dead ends: 131 [2022-07-12 04:45:05,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:45:05,578 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:05,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 204 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:45:05,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-12 04:45:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2022-07-12 04:45:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-12 04:45:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2022-07-12 04:45:05,592 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 43 [2022-07-12 04:45:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:05,593 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2022-07-12 04:45:05,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-07-12 04:45:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2022-07-12 04:45:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 04:45:05,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:05,594 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:45:05,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:05,807 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 [2022-07-12 04:45:05,808 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:05,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2022-07-12 04:45:05,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:05,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204212632] [2022-07-12 04:45:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:05,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:05,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:05,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478985205] [2022-07-12 04:45:05,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:45:05,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:05,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:05,819 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) [2022-07-12 04:45:05,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:45:05,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:45:05,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:45:05,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 04:45:05,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:45:05,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:45:05,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:05,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204212632] [2022-07-12 04:45:05,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:05,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478985205] [2022-07-12 04:45:05,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478985205] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:45:05,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:45:05,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:45:05,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047566755] [2022-07-12 04:45:05,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:45:05,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:45:05,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:05,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:45:05,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:45:05,889 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-07-12 04:45:05,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:05,965 INFO L93 Difference]: Finished difference Result 166 states and 226 transitions. [2022-07-12 04:45:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:45:05,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 43 [2022-07-12 04:45:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:05,967 INFO L225 Difference]: With dead ends: 166 [2022-07-12 04:45:05,967 INFO L226 Difference]: Without dead ends: 110 [2022-07-12 04:45:05,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:45:05,969 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:05,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 139 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:45:05,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-12 04:45:05,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2022-07-12 04:45:05,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.1875) internal successors, (76), 65 states have internal predecessors, (76), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-12 04:45:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2022-07-12 04:45:05,983 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 43 [2022-07-12 04:45:05,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:05,984 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2022-07-12 04:45:05,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-07-12 04:45:05,984 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2022-07-12 04:45:05,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 04:45:05,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:05,985 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, 1] [2022-07-12 04:45:06,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:06,204 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 [2022-07-12 04:45:06,204 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:06,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:06,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2022-07-12 04:45:06,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:06,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957950734] [2022-07-12 04:45:06,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:06,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:06,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:06,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506365489] [2022-07-12 04:45:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:06,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:06,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:06,217 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) [2022-07-12 04:45:06,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 04:45:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:06,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:45:06,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 04:45:06,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:45:06,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:06,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957950734] [2022-07-12 04:45:06,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:06,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506365489] [2022-07-12 04:45:06,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506365489] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:45:06,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:45:06,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:45:06,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279405415] [2022-07-12 04:45:06,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:45:06,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:45:06,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:06,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:45:06,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:45:06,362 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 04:45:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:06,446 INFO L93 Difference]: Finished difference Result 154 states and 217 transitions. [2022-07-12 04:45:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:45:06,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2022-07-12 04:45:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:06,448 INFO L225 Difference]: With dead ends: 154 [2022-07-12 04:45:06,448 INFO L226 Difference]: Without dead ends: 152 [2022-07-12 04:45:06,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:45:06,449 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:06,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:45:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-12 04:45:06,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2022-07-12 04:45:06,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 80 states have internal predecessors, (85), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-12 04:45:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 190 transitions. [2022-07-12 04:45:06,486 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 190 transitions. Word has length 48 [2022-07-12 04:45:06,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:06,486 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 190 transitions. [2022-07-12 04:45:06,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 04:45:06,486 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 190 transitions. [2022-07-12 04:45:06,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 04:45:06,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:06,487 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, 1, 1, 1] [2022-07-12 04:45:06,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:06,707 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 [2022-07-12 04:45:06,708 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:06,708 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2022-07-12 04:45:06,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:06,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177260867] [2022-07-12 04:45:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:06,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:06,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:06,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19692369] [2022-07-12 04:45:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:06,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:06,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:06,727 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) [2022-07-12 04:45:06,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 04:45:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:06,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 04:45:06,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 04:45:07,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:45:09,886 WARN L855 $PredicateComparison]: unable to prove that (or (not (= (+ |c_ULTIMATE.start_main_~c~0#1| (* (- 1) |c_ULTIMATE.start_main_~v~0#1|)) 0)) (let ((.cse11 (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (let ((.cse8 (= |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse4 (+ (* (- 1) .cse11 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (* |c_ULTIMATE.start_main_~s~0#1| .cse11) (- 1))))) (.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse0 (+ |c_ULTIMATE.start_main_~a~0#1| (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)))) (and (or (not (= .cse0 0)) (let ((.cse3 (= 0 |c_ULTIMATE.start_main_~q~0#1|)) (.cse1 (+ |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 (= .cse1 0)) (forall ((|ULTIMATE.start_main_~x~0#1| Int)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (+ (* (+ (* (- 1) .cse2 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~x~0#1|) |c_ULTIMATE.start_main_~b~0#1| (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (* |c_ULTIMATE.start_main_~s~0#1| .cse2) (- 1)))))))) (not .cse3)) (or .cse3 (not (= (mod .cse1 |c_ULTIMATE.start_main_~q~0#1|) 0)) (let ((.cse5 (div .cse1 |c_ULTIMATE.start_main_~q~0#1|))) (= (+ (* .cse4 .cse5) |c_ULTIMATE.start_main_~b~0#1| .cse6) (+ .cse7 (* .cse5 |c_ULTIMATE.start_main_~q~0#1|))))))) (not .cse8)) (let ((.cse10 (div .cse0 |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse9 (+ .cse7 (* .cse10 |c_ULTIMATE.start_main_~q~0#1|)))) (or (not (= .cse9 |c_ULTIMATE.start_main_~b~0#1|)) .cse8 (not (= (mod .cse0 |c_ULTIMATE.start_main_~p~0#1|) 0)) (= .cse9 (+ (* .cse4 .cse10) |c_ULTIMATE.start_main_~b~0#1| .cse6))))))))) is different from true [2022-07-12 04:45:09,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:09,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177260867] [2022-07-12 04:45:09,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:09,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19692369] [2022-07-12 04:45:09,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19692369] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:45:09,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:45:09,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-12 04:45:09,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738634686] [2022-07-12 04:45:09,889 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:45:09,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 04:45:09,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:09,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 04:45:09,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=290, Unknown=1, NotChecked=34, Total=380 [2022-07-12 04:45:09,890 INFO L87 Difference]: Start difference. First operand 136 states and 190 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-12 04:45:10,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:10,443 INFO L93 Difference]: Finished difference Result 196 states and 279 transitions. [2022-07-12 04:45:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 04:45:10,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 60 [2022-07-12 04:45:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:10,445 INFO L225 Difference]: With dead ends: 196 [2022-07-12 04:45:10,445 INFO L226 Difference]: Without dead ends: 193 [2022-07-12 04:45:10,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=84, Invalid=425, Unknown=1, NotChecked=42, Total=552 [2022-07-12 04:45:10,446 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 46 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:10,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 224 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:45:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-12 04:45:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 178. [2022-07-12 04:45:10,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 97 states have (on average 1.175257731958763) internal successors, (114), 105 states have internal predecessors, (114), 69 states have call successors, (69), 11 states have call predecessors, (69), 11 states have return successors, (68), 61 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-12 04:45:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 251 transitions. [2022-07-12 04:45:10,475 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 251 transitions. Word has length 60 [2022-07-12 04:45:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:10,475 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 251 transitions. [2022-07-12 04:45:10,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-12 04:45:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 251 transitions. [2022-07-12 04:45:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-12 04:45:10,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:10,476 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:45:10,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:10,695 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 [2022-07-12 04:45:10,695 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:10,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:10,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1649355429, now seen corresponding path program 2 times [2022-07-12 04:45:10,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:10,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296295091] [2022-07-12 04:45:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:10,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:10,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:10,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358402611] [2022-07-12 04:45:10,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:45:10,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:10,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:10,708 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) [2022-07-12 04:45:10,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 04:45:10,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:45:10,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:45:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 04:45:10,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-12 04:45:10,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:45:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-12 04:45:10,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:10,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296295091] [2022-07-12 04:45:10,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:10,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358402611] [2022-07-12 04:45:10,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358402611] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:45:10,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:45:10,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-12 04:45:10,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401674451] [2022-07-12 04:45:10,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:45:10,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:45:10,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:45:10,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:45:10,857 INFO L87 Difference]: Start difference. First operand 178 states and 251 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 04:45:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:11,184 INFO L93 Difference]: Finished difference Result 273 states and 400 transitions. [2022-07-12 04:45:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 04:45:11,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2022-07-12 04:45:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:11,189 INFO L225 Difference]: With dead ends: 273 [2022-07-12 04:45:11,189 INFO L226 Difference]: Without dead ends: 266 [2022-07-12 04:45:11,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:45:11,190 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 48 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:11,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 288 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:45:11,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-12 04:45:11,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 193. [2022-07-12 04:45:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 117 states have internal predecessors, (135), 69 states have call successors, (69), 11 states have call predecessors, (69), 11 states have return successors, (68), 64 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-12 04:45:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 272 transitions. [2022-07-12 04:45:11,221 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 272 transitions. Word has length 65 [2022-07-12 04:45:11,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:11,222 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 272 transitions. [2022-07-12 04:45:11,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 04:45:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 272 transitions. [2022-07-12 04:45:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-12 04:45:11,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:11,223 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 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, 1] [2022-07-12 04:45:11,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:11,446 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 [2022-07-12 04:45:11,446 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:11,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:11,447 INFO L85 PathProgramCache]: Analyzing trace with hash -492391883, now seen corresponding path program 1 times [2022-07-12 04:45:11,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:11,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244415328] [2022-07-12 04:45:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:11,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:11,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:11,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603781499] [2022-07-12 04:45:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:11,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:11,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:11,458 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) [2022-07-12 04:45:11,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 04:45:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 04:45:11,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-12 04:45:11,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:45:11,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:11,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244415328] [2022-07-12 04:45:11,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:11,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603781499] [2022-07-12 04:45:11,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603781499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:45:11,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:45:11,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:45:11,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250150187] [2022-07-12 04:45:11,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:45:11,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:45:11,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:11,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:45:11,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:45:11,544 INFO L87 Difference]: Start difference. First operand 193 states and 272 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 04:45:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:11,630 INFO L93 Difference]: Finished difference Result 324 states and 455 transitions. [2022-07-12 04:45:11,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:45:11,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 68 [2022-07-12 04:45:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:11,631 INFO L225 Difference]: With dead ends: 324 [2022-07-12 04:45:11,632 INFO L226 Difference]: Without dead ends: 210 [2022-07-12 04:45:11,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:45:11,633 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:11,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:45:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-12 04:45:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 194. [2022-07-12 04:45:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 114 states have internal predecessors, (136), 69 states have call successors, (69), 11 states have call predecessors, (69), 11 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-12 04:45:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 273 transitions. [2022-07-12 04:45:11,658 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 273 transitions. Word has length 68 [2022-07-12 04:45:11,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:11,658 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 273 transitions. [2022-07-12 04:45:11,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 04:45:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 273 transitions. [2022-07-12 04:45:11,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-12 04:45:11,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:11,659 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 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] [2022-07-12 04:45:11,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:11,872 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 [2022-07-12 04:45:11,872 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:11,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:11,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2022-07-12 04:45:11,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:11,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228344748] [2022-07-12 04:45:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:11,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:11,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:11,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387237011] [2022-07-12 04:45:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:11,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:11,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:11,883 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) [2022-07-12 04:45:11,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 04:45:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:11,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 04:45:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-07-12 04:45:12,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:45:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-12 04:45:12,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:12,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228344748] [2022-07-12 04:45:12,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:12,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387237011] [2022-07-12 04:45:12,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387237011] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 04:45:12,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:45:12,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-07-12 04:45:12,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437081312] [2022-07-12 04:45:12,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:45:12,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:45:12,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:12,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:45:12,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:45:12,118 INFO L87 Difference]: Start difference. First operand 194 states and 273 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 04:45:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:12,175 INFO L93 Difference]: Finished difference Result 200 states and 278 transitions. [2022-07-12 04:45:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:45:12,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2022-07-12 04:45:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:12,177 INFO L225 Difference]: With dead ends: 200 [2022-07-12 04:45:12,177 INFO L226 Difference]: Without dead ends: 198 [2022-07-12 04:45:12,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:45:12,178 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:12,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:45:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-12 04:45:12,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-07-12 04:45:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 116 states have (on average 1.1982758620689655) internal successors, (139), 117 states have internal predecessors, (139), 69 states have call successors, (69), 12 states have call predecessors, (69), 12 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-12 04:45:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 276 transitions. [2022-07-12 04:45:12,203 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 276 transitions. Word has length 70 [2022-07-12 04:45:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:12,204 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 276 transitions. [2022-07-12 04:45:12,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 04:45:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 276 transitions. [2022-07-12 04:45:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-12 04:45:12,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:12,209 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:45:12,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:12,432 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 [2022-07-12 04:45:12,432 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:12,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:12,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2022-07-12 04:45:12,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:12,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028784726] [2022-07-12 04:45:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:12,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:12,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:12,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793880072] [2022-07-12 04:45:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:12,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:12,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:12,449 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) [2022-07-12 04:45:12,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 04:45:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:12,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 04:45:12,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 04:45:12,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:45:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 04:45:12,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:12,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028784726] [2022-07-12 04:45:12,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:12,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793880072] [2022-07-12 04:45:12,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793880072] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:45:12,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:45:12,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-07-12 04:45:12,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522779758] [2022-07-12 04:45:12,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:45:12,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 04:45:12,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 04:45:12,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-07-12 04:45:12,936 INFO L87 Difference]: Start difference. First operand 198 states and 276 transitions. Second operand has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-12 04:45:13,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:13,820 INFO L93 Difference]: Finished difference Result 268 states and 365 transitions. [2022-07-12 04:45:13,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 04:45:13,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2022-07-12 04:45:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:13,822 INFO L225 Difference]: With dead ends: 268 [2022-07-12 04:45:13,822 INFO L226 Difference]: Without dead ends: 266 [2022-07-12 04:45:13,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:45:13,823 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 100 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:13,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 186 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 04:45:13,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-12 04:45:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 210. [2022-07-12 04:45:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 125 states have (on average 1.184) internal successors, (148), 126 states have internal predecessors, (148), 69 states have call successors, (69), 15 states have call predecessors, (69), 15 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-12 04:45:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 285 transitions. [2022-07-12 04:45:13,848 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 285 transitions. Word has length 68 [2022-07-12 04:45:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:13,848 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 285 transitions. [2022-07-12 04:45:13,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-12 04:45:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 285 transitions. [2022-07-12 04:45:13,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 04:45:13,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:13,850 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 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, 1] [2022-07-12 04:45:13,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:14,063 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 [2022-07-12 04:45:14,063 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 2 times [2022-07-12 04:45:14,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:14,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592035194] [2022-07-12 04:45:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:14,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:14,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:14,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116927789] [2022-07-12 04:45:14,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:45:14,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:14,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:14,073 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) [2022-07-12 04:45:14,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 04:45:14,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:45:14,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:45:14,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-12 04:45:14,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-12 04:45:14,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:45:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-12 04:45:16,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:16,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592035194] [2022-07-12 04:45:16,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:16,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116927789] [2022-07-12 04:45:16,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116927789] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:45:16,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:45:16,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-07-12 04:45:16,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620153407] [2022-07-12 04:45:16,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:45:16,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 04:45:16,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:16,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 04:45:16,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-07-12 04:45:16,061 INFO L87 Difference]: Start difference. First operand 210 states and 285 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2022-07-12 04:45:27,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:33,458 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 [] [2022-07-12 04:45:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:37,293 INFO L93 Difference]: Finished difference Result 297 states and 390 transitions. [2022-07-12 04:45:37,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 04:45:37,294 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 73 [2022-07-12 04:45:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:37,295 INFO L225 Difference]: With dead ends: 297 [2022-07-12 04:45:37,295 INFO L226 Difference]: Without dead ends: 295 [2022-07-12 04:45:37,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=390, Invalid=1772, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 04:45:37,297 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 128 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 293 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:37,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 309 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1013 Invalid, 1 Unknown, 0 Unchecked, 13.5s Time] [2022-07-12 04:45:37,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-12 04:45:37,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 245. [2022-07-12 04:45:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 152 states have (on average 1.1578947368421053) internal successors, (176), 154 states have internal predecessors, (176), 71 states have call successors, (71), 21 states have call predecessors, (71), 21 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2022-07-12 04:45:37,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 317 transitions. [2022-07-12 04:45:37,337 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 317 transitions. Word has length 73 [2022-07-12 04:45:37,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:37,338 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 317 transitions. [2022-07-12 04:45:37,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2022-07-12 04:45:37,338 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 317 transitions. [2022-07-12 04:45:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 04:45:37,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:37,339 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1] [2022-07-12 04:45:37,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:37,547 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 [2022-07-12 04:45:37,548 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:37,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:37,548 INFO L85 PathProgramCache]: Analyzing trace with hash 593432004, now seen corresponding path program 1 times [2022-07-12 04:45:37,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:37,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575919817] [2022-07-12 04:45:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:37,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:37,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:37,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738432430] [2022-07-12 04:45:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:37,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:37,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:37,561 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) [2022-07-12 04:45:37,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 04:45:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:37,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-12 04:45:37,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-12 04:45:38,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:45:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-12 04:45:40,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:40,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575919817] [2022-07-12 04:45:40,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:40,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738432430] [2022-07-12 04:45:40,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738432430] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:45:40,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:45:40,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-12 04:45:40,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524561729] [2022-07-12 04:45:40,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:45:40,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 04:45:40,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 04:45:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-07-12 04:45:40,571 INFO L87 Difference]: Start difference. First operand 245 states and 317 transitions. Second operand has 22 states, 20 states have (on average 2.35) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-12 04:45:46,164 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 [] [2022-07-12 04:45:47,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:51,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:02,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:46:02,419 INFO L93 Difference]: Finished difference Result 473 states and 661 transitions. [2022-07-12 04:46:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 04:46:02,420 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 82 [2022-07-12 04:46:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:46:02,422 INFO L225 Difference]: With dead ends: 473 [2022-07-12 04:46:02,422 INFO L226 Difference]: Without dead ends: 465 [2022-07-12 04:46:02,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=560, Invalid=2632, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 04:46:02,424 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 128 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 383 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:46:02,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 388 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 1686 Invalid, 1 Unknown, 0 Unchecked, 18.0s Time] [2022-07-12 04:46:02,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-07-12 04:46:02,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 390. [2022-07-12 04:46:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 243 states have (on average 1.1851851851851851) internal successors, (288), 246 states have internal predecessors, (288), 121 states have call successors, (121), 25 states have call predecessors, (121), 25 states have return successors, (120), 118 states have call predecessors, (120), 120 states have call successors, (120) [2022-07-12 04:46:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 529 transitions. [2022-07-12 04:46:02,540 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 529 transitions. Word has length 82 [2022-07-12 04:46:02,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:46:02,540 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 529 transitions. [2022-07-12 04:46:02,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-12 04:46:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 529 transitions. [2022-07-12 04:46:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-12 04:46:02,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:46:02,542 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:46:02,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 04:46:02,760 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 [2022-07-12 04:46:02,760 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:46:02,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:46:02,760 INFO L85 PathProgramCache]: Analyzing trace with hash 28846429, now seen corresponding path program 2 times [2022-07-12 04:46:02,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:46:02,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413224376] [2022-07-12 04:46:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:46:02,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:46:02,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:46:02,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229674705] [2022-07-12 04:46:02,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:46:02,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:46:02,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:46:02,773 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) [2022-07-12 04:46:02,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 04:46:02,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:46:02,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:46:02,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-12 04:46:02,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:46:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 86 proven. 74 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-07-12 04:46:04,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:46:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 93 proven. 41 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-12 04:46:09,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:46:09,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413224376] [2022-07-12 04:46:09,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:46:09,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229674705] [2022-07-12 04:46:09,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229674705] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:46:09,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:46:09,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-07-12 04:46:09,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129910957] [2022-07-12 04:46:09,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:46:09,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 04:46:09,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:46:09,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 04:46:09,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 04:46:09,582 INFO L87 Difference]: Start difference. First operand 390 states and 529 transitions. Second operand has 34 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 14 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-07-12 04:46:29,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:39,246 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:42,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:51,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:54,070 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:56,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:47:40,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:47:41,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:47:44,476 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 [] [2022-07-12 04:47:59,192 WARN L233 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 113 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:48:18,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:48:18,099 INFO L93 Difference]: Finished difference Result 634 states and 894 transitions. [2022-07-12 04:48:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-12 04:48:18,100 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 14 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) Word has length 109 [2022-07-12 04:48:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:48:18,103 INFO L225 Difference]: With dead ends: 634 [2022-07-12 04:48:18,103 INFO L226 Difference]: Without dead ends: 626 [2022-07-12 04:48:18,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 198 SyntacticMatches, 4 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5076 ImplicationChecksByTransitivity, 90.2s TimeCoverageRelationStatistics Valid=2724, Invalid=13278, Unknown=0, NotChecked=0, Total=16002 [2022-07-12 04:48:18,108 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 241 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 3037 mSolverCounterSat, 688 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 3037 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:48:18,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 523 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 3037 Invalid, 6 Unknown, 0 Unchecked, 41.4s Time] [2022-07-12 04:48:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-07-12 04:48:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 521. [2022-07-12 04:48:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 300 states have (on average 1.2066666666666668) internal successors, (362), 303 states have internal predecessors, (362), 189 states have call successors, (189), 31 states have call predecessors, (189), 31 states have return successors, (188), 186 states have call predecessors, (188), 188 states have call successors, (188) [2022-07-12 04:48:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 739 transitions. [2022-07-12 04:48:18,295 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 739 transitions. Word has length 109 [2022-07-12 04:48:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:48:18,296 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 739 transitions. [2022-07-12 04:48:18,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 14 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-07-12 04:48:18,296 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 739 transitions. [2022-07-12 04:48:18,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-12 04:48:18,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:48:18,299 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:48:18,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 04:48:18,509 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 [2022-07-12 04:48:18,509 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:48:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:48:18,510 INFO L85 PathProgramCache]: Analyzing trace with hash -876975624, now seen corresponding path program 3 times [2022-07-12 04:48:18,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:48:18,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118669297] [2022-07-12 04:48:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:48:18,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:48:18,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:48:18,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561079605] [2022-07-12 04:48:18,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:48:18,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:48:18,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:48:18,520 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) [2022-07-12 04:48:18,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 04:48:18,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 04:48:18,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:48:18,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-12 04:48:18,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:48:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 82 proven. 40 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-07-12 04:48:19,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:48:26,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:48:26,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118669297] [2022-07-12 04:48:26,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:48:26,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561079605] [2022-07-12 04:48:26,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561079605] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:48:26,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:48:26,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-12 04:48:26,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063744651] [2022-07-12 04:48:26,945 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:48:26,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 04:48:26,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:48:26,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 04:48:26,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=624, Unknown=1, NotChecked=0, Total=756 [2022-07-12 04:48:26,947 INFO L87 Difference]: Start difference. First operand 521 states and 739 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-12 04:48:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:48:29,385 INFO L93 Difference]: Finished difference Result 649 states and 921 transitions. [2022-07-12 04:48:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 04:48:29,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 112 [2022-07-12 04:48:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:48:29,389 INFO L225 Difference]: With dead ends: 649 [2022-07-12 04:48:29,389 INFO L226 Difference]: Without dead ends: 642 [2022-07-12 04:48:29,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=190, Invalid=931, Unknown=1, NotChecked=0, Total=1122 [2022-07-12 04:48:29,390 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 67 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-12 04:48:29,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 391 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-12 04:48:29,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-07-12 04:48:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 614. [2022-07-12 04:48:29,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 349 states have (on average 1.2148997134670487) internal successors, (424), 352 states have internal predecessors, (424), 229 states have call successors, (229), 35 states have call predecessors, (229), 35 states have return successors, (228), 226 states have call predecessors, (228), 228 states have call successors, (228) [2022-07-12 04:48:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 881 transitions. [2022-07-12 04:48:29,627 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 881 transitions. Word has length 112 [2022-07-12 04:48:29,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:48:29,627 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 881 transitions. [2022-07-12 04:48:29,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-12 04:48:29,627 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 881 transitions. [2022-07-12 04:48:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-12 04:48:29,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:48:29,630 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:48:29,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 04:48:29,854 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 [2022-07-12 04:48:29,854 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:48:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:48:29,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1746474790, now seen corresponding path program 4 times [2022-07-12 04:48:29,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:48:29,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005126133] [2022-07-12 04:48:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:48:29,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:48:29,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:48:29,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605477229] [2022-07-12 04:48:29,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:48:29,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:48:29,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:48:29,876 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) [2022-07-12 04:48:29,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 04:48:29,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:48:29,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:48:29,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-12 04:48:29,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:48:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 55 proven. 81 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-07-12 04:48:30,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:48:32,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:48:32,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005126133] [2022-07-12 04:48:32,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:48:32,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605477229] [2022-07-12 04:48:32,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605477229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:48:32,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:48:32,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-12 04:48:32,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225949009] [2022-07-12 04:48:32,798 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:48:32,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 04:48:32,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:48:32,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 04:48:32,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:48:32,799 INFO L87 Difference]: Start difference. First operand 614 states and 881 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-12 04:48:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:48:34,542 INFO L93 Difference]: Finished difference Result 901 states and 1312 transitions. [2022-07-12 04:48:34,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 04:48:34,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 117 [2022-07-12 04:48:34,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:48:34,548 INFO L225 Difference]: With dead ends: 901 [2022-07-12 04:48:34,549 INFO L226 Difference]: Without dead ends: 898 [2022-07-12 04:48:34,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 04:48:34,550 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 97 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:48:34,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 487 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1772 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 04:48:34,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-07-12 04:48:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 858. [2022-07-12 04:48:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 468 states have (on average 1.2371794871794872) internal successors, (579), 471 states have internal predecessors, (579), 345 states have call successors, (345), 44 states have call predecessors, (345), 44 states have return successors, (344), 342 states have call predecessors, (344), 344 states have call successors, (344) [2022-07-12 04:48:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1268 transitions. [2022-07-12 04:48:34,890 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1268 transitions. Word has length 117 [2022-07-12 04:48:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:48:34,891 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 1268 transitions. [2022-07-12 04:48:34,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-12 04:48:34,891 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1268 transitions. [2022-07-12 04:48:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-12 04:48:34,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:48:34,895 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:48:34,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 04:48:35,119 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 [2022-07-12 04:48:35,119 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:48:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:48:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1576994048, now seen corresponding path program 1 times [2022-07-12 04:48:35,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:48:35,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716552647] [2022-07-12 04:48:35,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:48:35,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:48:35,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:48:35,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47565422] [2022-07-12 04:48:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:48:35,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:48:35,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:48:35,129 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) [2022-07-12 04:48:35,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 04:48:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:48:35,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:48:35,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:48:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 74 proven. 38 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2022-07-12 04:48:36,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:48:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 95 proven. 13 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2022-07-12 04:48:36,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:48:36,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716552647] [2022-07-12 04:48:36,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:48:36,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47565422] [2022-07-12 04:48:36,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47565422] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:48:36,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:48:36,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-07-12 04:48:36,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420543709] [2022-07-12 04:48:36,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:48:36,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 04:48:36,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:48:36,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 04:48:36,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-07-12 04:48:36,975 INFO L87 Difference]: Start difference. First operand 858 states and 1268 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 8 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 8 states have call successors, (32) [2022-07-12 04:48:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:48:40,204 INFO L93 Difference]: Finished difference Result 1489 states and 2165 transitions. [2022-07-12 04:48:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 04:48:40,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 8 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 8 states have call successors, (32) Word has length 120 [2022-07-12 04:48:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:48:40,208 INFO L225 Difference]: With dead ends: 1489 [2022-07-12 04:48:40,209 INFO L226 Difference]: Without dead ends: 972 [2022-07-12 04:48:40,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=552, Invalid=1998, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 04:48:40,214 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 100 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 04:48:40,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 295 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-12 04:48:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-07-12 04:48:40,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 882. [2022-07-12 04:48:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 496 states have (on average 1.217741935483871) internal successors, (604), 504 states have internal predecessors, (604), 335 states have call successors, (335), 50 states have call predecessors, (335), 50 states have return successors, (334), 327 states have call predecessors, (334), 334 states have call successors, (334) [2022-07-12 04:48:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1273 transitions. [2022-07-12 04:48:40,571 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1273 transitions. Word has length 120 [2022-07-12 04:48:40,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:48:40,571 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 1273 transitions. [2022-07-12 04:48:40,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 8 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 8 states have call successors, (32) [2022-07-12 04:48:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1273 transitions. [2022-07-12 04:48:40,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-12 04:48:40,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:48:40,574 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:48:40,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 04:48:40,779 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 [2022-07-12 04:48:40,780 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:48:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:48:40,780 INFO L85 PathProgramCache]: Analyzing trace with hash -843376510, now seen corresponding path program 2 times [2022-07-12 04:48:40,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:48:40,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891820396] [2022-07-12 04:48:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:48:40,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:48:40,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:48:40,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217970309] [2022-07-12 04:48:40,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:48:40,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:48:40,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:48:40,793 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) [2022-07-12 04:48:40,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 04:48:40,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:48:40,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:48:40,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-12 04:48:40,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:48:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 118 proven. 71 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-07-12 04:48:41,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:48:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 146 proven. 19 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-07-12 04:48:46,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:48:46,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891820396] [2022-07-12 04:48:46,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:48:46,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217970309] [2022-07-12 04:48:46,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217970309] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:48:46,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:48:46,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 26 [2022-07-12 04:48:46,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933404524] [2022-07-12 04:48:46,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:48:46,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 04:48:46,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:48:46,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 04:48:46,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=548, Unknown=1, NotChecked=0, Total=650 [2022-07-12 04:48:46,302 INFO L87 Difference]: Start difference. First operand 882 states and 1273 transitions. Second operand has 26 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-07-12 04:48:50,375 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 [] [2022-07-12 04:48:55,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:49:12,053 WARN L233 SmtUtils]: Spent 12.04s on a formula simplification. DAG size of input: 47 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:49:19,657 WARN L233 SmtUtils]: Spent 7.23s on a formula simplification. DAG size of input: 60 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:49:28,297 WARN L233 SmtUtils]: Spent 7.66s on a formula simplification. DAG size of input: 75 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:49:30,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:49:32,304 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 []