./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i -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 b879e9957df47aa9212d1bcb19c90b87b865d954f1a44f3c044747ce0553d2eb --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 11:38:52,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 11:38:52,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 11:38:52,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 11:38:52,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 11:38:52,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 11:38:52,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 11:38:52,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 11:38:52,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 11:38:52,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 11:38:52,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 11:38:52,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 11:38:52,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 11:38:52,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 11:38:52,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 11:38:52,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 11:38:52,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 11:38:52,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 11:38:52,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 11:38:52,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 11:38:52,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 11:38:52,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 11:38:52,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 11:38:52,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 11:38:52,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 11:38:52,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 11:38:52,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 11:38:52,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 11:38:52,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 11:38:52,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 11:38:52,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 11:38:52,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 11:38:52,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 11:38:52,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 11:38:52,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 11:38:52,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 11:38:52,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 11:38:52,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 11:38:52,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 11:38:52,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 11:38:52,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 11:38:52,586 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 11:38:52,601 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 11:38:52,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 11:38:52,601 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 11:38:52,601 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 11:38:52,602 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 11:38:52,602 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 11:38:52,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 11:38:52,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 11:38:52,603 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 11:38:52,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 11:38:52,604 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 11:38:52,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 11:38:52,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 11:38:52,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 11:38:52,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 11:38:52,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 11:38:52,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 11:38:52,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 11:38:52,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 11:38:52,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 11:38:52,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 11:38:52,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 11:38:52,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 11:38:52,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 11:38:52,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:38:52,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 11:38:52,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 11:38:52,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 11:38:52,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 11:38:52,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 11:38:52,608 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 11:38:52,608 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 11:38:52,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 11:38:52,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 11:38:52,609 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b879e9957df47aa9212d1bcb19c90b87b865d954f1a44f3c044747ce0553d2eb [2021-12-17 11:38:52,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 11:38:52,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 11:38:52,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 11:38:52,778 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 11:38:52,783 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 11:38:52,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i [2021-12-17 11:38:52,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f518f84ad/c991275ea43f44a4bdec0aa1d7c501bb/FLAG1055c401c [2021-12-17 11:38:53,171 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 11:38:53,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i [2021-12-17 11:38:53,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f518f84ad/c991275ea43f44a4bdec0aa1d7c501bb/FLAG1055c401c [2021-12-17 11:38:53,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f518f84ad/c991275ea43f44a4bdec0aa1d7c501bb [2021-12-17 11:38:53,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 11:38:53,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 11:38:53,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 11:38:53,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 11:38:53,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 11:38:53,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:38:53" (1/1) ... [2021-12-17 11:38:53,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d550c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:38:53, skipping insertion in model container [2021-12-17 11:38:53,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:38:53" (1/1) ... [2021-12-17 11:38:53,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 11:38:53,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 11:38:53,763 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/divbin_unwindbound10.i[950,963] [2021-12-17 11:38:53,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:38:53,779 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 11:38:53,787 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/divbin_unwindbound10.i[950,963] [2021-12-17 11:38:53,791 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:38:53,800 INFO L208 MainTranslator]: Completed translation [2021-12-17 11:38:53,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:38:53 WrapperNode [2021-12-17 11:38:53,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 11:38:53,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 11:38:53,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 11:38:53,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 11:38:53,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:38:53" (1/1) ... [2021-12-17 11:38:53,811 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:38:53" (1/1) ... [2021-12-17 11:38:53,824 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2021-12-17 11:38:53,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 11:38:53,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 11:38:53,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 11:38:53,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 11:38:53,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:38:53" (1/1) ... [2021-12-17 11:38:53,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:38:53" (1/1) ... [2021-12-17 11:38:53,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:38:53" (1/1) ... [2021-12-17 11:38:53,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:38:53" (1/1) ... [2021-12-17 11:38:53,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:38:53" (1/1) ... [2021-12-17 11:38:53,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:38:53" (1/1) ... [2021-12-17 11:38:53,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:38:53" (1/1) ... [2021-12-17 11:38:53,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 11:38:53,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 11:38:53,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 11:38:53,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 11:38:53,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:38:53" (1/1) ... [2021-12-17 11:38:53,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:38:53,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:38:53,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 11:38:53,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 11:38:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 11:38:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 11:38:53,925 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 11:38:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 11:38:53,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 11:38:53,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 11:38:53,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 11:38:53,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 11:38:53,974 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 11:38:53,975 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 11:38:54,082 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 11:38:54,086 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 11:38:54,087 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 11:38:54,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:38:54 BoogieIcfgContainer [2021-12-17 11:38:54,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 11:38:54,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 11:38:54,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 11:38:54,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 11:38:54,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:38:53" (1/3) ... [2021-12-17 11:38:54,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b5c3e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:38:54, skipping insertion in model container [2021-12-17 11:38:54,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:38:53" (2/3) ... [2021-12-17 11:38:54,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b5c3e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:38:54, skipping insertion in model container [2021-12-17 11:38:54,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:38:54" (3/3) ... [2021-12-17 11:38:54,094 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound10.i [2021-12-17 11:38:54,098 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 11:38:54,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 11:38:54,139 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 11:38:54,160 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 11:38:54,161 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 11:38:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 11:38:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 11:38:54,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:38:54,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:38:54,201 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:38:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:38:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2021-12-17 11:38:54,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:38:54,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517930332] [2021-12-17 11:38:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:54,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:38:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:38:54,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 11:38:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:38:54,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 11:38:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:38:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:38:54,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:38:54,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517930332] [2021-12-17 11:38:54,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517930332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:38:54,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:38:54,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 11:38:54,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387662798] [2021-12-17 11:38:54,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:38:54,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 11:38:54,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:38:54,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 11:38:54,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:38:54,437 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 11:38:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:38:54,451 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2021-12-17 11:38:54,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 11:38:54,453 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-17 11:38:54,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:38:54,458 INFO L225 Difference]: With dead ends: 53 [2021-12-17 11:38:54,459 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 11:38:54,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:38:54,463 INFO L933 BasicCegarLoop]: 34 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, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:38:54,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:38:54,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 11:38:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-17 11:38:54,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 11:38:54,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-17 11:38:54,495 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2021-12-17 11:38:54,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:38:54,495 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-17 11:38:54,496 INFO L471 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 11:38:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-12-17 11:38:54,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-17 11:38:54,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:38:54,498 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:38:54,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 11:38:54,498 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:38:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:38:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2021-12-17 11:38:54,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:38:54,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149809745] [2021-12-17 11:38:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:54,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:38:54,511 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:38:54,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796167228] [2021-12-17 11:38:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:54,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:38:54,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:38:54,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:38:54,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 11:38:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:38:54,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 11:38:54,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:38:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:38:54,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:38:54,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:38:54,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149809745] [2021-12-17 11:38:54,648 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:38:54,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796167228] [2021-12-17 11:38:54,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796167228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:38:54,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:38:54,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 11:38:54,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783515441] [2021-12-17 11:38:54,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:38:54,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 11:38:54,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:38:54,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 11:38:54,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 11:38:54,652 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:38:54,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:38:54,665 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-12-17 11:38:54,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 11:38:54,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-12-17 11:38:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:38:54,666 INFO L225 Difference]: With dead ends: 38 [2021-12-17 11:38:54,666 INFO L226 Difference]: Without dead ends: 26 [2021-12-17 11:38:54,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 11:38:54,668 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:38:54,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:38:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-17 11:38:54,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-17 11:38:54,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 11:38:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-12-17 11:38:54,673 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2021-12-17 11:38:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:38:54,674 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-12-17 11:38:54,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:38:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-12-17 11:38:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 11:38:54,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:38:54,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:38:54,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 11:38:54,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:38:54,896 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:38:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:38:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2021-12-17 11:38:54,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:38:54,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251602781] [2021-12-17 11:38:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:54,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:38:54,913 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:38:54,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959203875] [2021-12-17 11:38:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:54,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:38:54,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:38:54,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:38:54,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 11:38:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:38:54,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 11:38:54,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:38:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 11:38:55,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:38:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:38:55,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:38:55,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251602781] [2021-12-17 11:38:55,281 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:38:55,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959203875] [2021-12-17 11:38:55,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959203875] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 11:38:55,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:38:55,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-12-17 11:38:55,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203672803] [2021-12-17 11:38:55,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:38:55,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 11:38:55,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:38:55,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 11:38:55,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:38:55,284 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:38:57,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:38:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:38:57,645 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-12-17 11:38:57,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:38:57,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-17 11:38:57,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:38:57,651 INFO L225 Difference]: With dead ends: 38 [2021-12-17 11:38:57,651 INFO L226 Difference]: Without dead ends: 35 [2021-12-17 11:38:57,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-17 11:38:57,652 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 11:38:57,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 90 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 11:38:57,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-17 11:38:57,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-17 11:38:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 11:38:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-12-17 11:38:57,657 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2021-12-17 11:38:57,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:38:57,658 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-12-17 11:38:57,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:38:57,658 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-12-17 11:38:57,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 11:38:57,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:38:57,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:38:57,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 11:38:57,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-17 11:38:57,875 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:38:57,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:38:57,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421036, now seen corresponding path program 1 times [2021-12-17 11:38:57,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:38:57,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448064972] [2021-12-17 11:38:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:57,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:38:57,890 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:38:57,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429422538] [2021-12-17 11:38:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:57,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:38:57,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:38:57,895 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:38:57,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 11:38:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:38:57,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 11:38:57,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:38:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:38:57,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:38:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:38:58,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:38:58,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448064972] [2021-12-17 11:38:58,043 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:38:58,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429422538] [2021-12-17 11:38:58,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429422538] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:38:58,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:38:58,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-17 11:38:58,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778234117] [2021-12-17 11:38:58,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:38:58,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:38:58,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:38:58,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:38:58,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:38:58,046 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 11:38:58,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:38:58,111 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2021-12-17 11:38:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 11:38:58,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 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 24 [2021-12-17 11:38:58,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:38:58,113 INFO L225 Difference]: With dead ends: 69 [2021-12-17 11:38:58,113 INFO L226 Difference]: Without dead ends: 57 [2021-12-17 11:38:58,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:38:58,114 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:38:58,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 145 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:38:58,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-17 11:38:58,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2021-12-17 11:38:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 11:38:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-12-17 11:38:58,120 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2021-12-17 11:38:58,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:38:58,120 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-12-17 11:38:58,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 11:38:58,121 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-12-17 11:38:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 11:38:58,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:38:58,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:38:58,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 11:38:58,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:38:58,338 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:38:58,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:38:58,338 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2021-12-17 11:38:58,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:38:58,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584510486] [2021-12-17 11:38:58,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:58,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:38:58,348 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:38:58,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988310310] [2021-12-17 11:38:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:58,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:38:58,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:38:58,349 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:38:58,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 11:38:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:38:58,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 11:38:58,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:38:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 11:38:58,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:38:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:38:58,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:38:58,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584510486] [2021-12-17 11:38:58,815 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:38:58,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988310310] [2021-12-17 11:38:58,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988310310] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 11:38:58,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:38:58,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-12-17 11:38:58,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272938735] [2021-12-17 11:38:58,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:38:58,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 11:38:58,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:38:58,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 11:38:58,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:38:58,816 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:38:58,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:38:58,839 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-12-17 11:38:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:38:58,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-12-17 11:38:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:38:58,841 INFO L225 Difference]: With dead ends: 53 [2021-12-17 11:38:58,842 INFO L226 Difference]: Without dead ends: 51 [2021-12-17 11:38:58,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-17 11:38:58,843 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:38:58,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 138 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2021-12-17 11:38:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-17 11:38:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-12-17 11:38:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 41 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 11:38:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-17 11:38:58,849 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 25 [2021-12-17 11:38:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:38:58,849 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-17 11:38:58,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:38:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-17 11:38:58,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 11:38:58,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:38:58,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:38:58,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 11:38:59,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:38:59,063 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:38:59,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:38:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash -452755568, now seen corresponding path program 1 times [2021-12-17 11:38:59,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:38:59,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547543176] [2021-12-17 11:38:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:59,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:38:59,088 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:38:59,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151186251] [2021-12-17 11:38:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:59,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:38:59,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:38:59,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:38:59,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 11:38:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:38:59,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:38:59,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:38:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:38:59,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:38:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:38:59,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:38:59,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547543176] [2021-12-17 11:38:59,274 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:38:59,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151186251] [2021-12-17 11:38:59,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151186251] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:38:59,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:38:59,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-12-17 11:38:59,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660311196] [2021-12-17 11:38:59,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:38:59,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 11:38:59,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:38:59,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 11:38:59,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:38:59,276 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 11:38:59,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:38:59,378 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2021-12-17 11:38:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 11:38:59,379 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 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 25 [2021-12-17 11:38:59,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:38:59,380 INFO L225 Difference]: With dead ends: 124 [2021-12-17 11:38:59,380 INFO L226 Difference]: Without dead ends: 117 [2021-12-17 11:38:59,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-17 11:38:59,381 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:38:59,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 143 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:38:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-17 11:38:59,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2021-12-17 11:38:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 92 states have internal predecessors, (107), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 11:38:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2021-12-17 11:38:59,399 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 25 [2021-12-17 11:38:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:38:59,399 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2021-12-17 11:38:59,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 11:38:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2021-12-17 11:38:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 11:38:59,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:38:59,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:38:59,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 11:38:59,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:38:59,601 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:38:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:38:59,602 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2021-12-17 11:38:59,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:38:59,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769190599] [2021-12-17 11:38:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:59,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:38:59,609 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:38:59,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481399040] [2021-12-17 11:38:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:59,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:38:59,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:38:59,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:38:59,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 11:38:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:38:59,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 11:38:59,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:38:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:38:59,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:38:59,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:38:59,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769190599] [2021-12-17 11:38:59,707 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:38:59,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481399040] [2021-12-17 11:38:59,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481399040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:38:59,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:38:59,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 11:38:59,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308442028] [2021-12-17 11:38:59,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:38:59,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 11:38:59,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:38:59,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 11:38:59,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 11:38:59,709 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 11:38:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:38:59,727 INFO L93 Difference]: Finished difference Result 151 states and 185 transitions. [2021-12-17 11:38:59,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 11:38:59,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-17 11:38:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:38:59,731 INFO L225 Difference]: With dead ends: 151 [2021-12-17 11:38:59,732 INFO L226 Difference]: Without dead ends: 96 [2021-12-17 11:38:59,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 11:38:59,733 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:38:59,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:38:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-17 11:38:59,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-17 11:38:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 80 states have internal predecessors, (94), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 11:38:59,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2021-12-17 11:38:59,740 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 31 [2021-12-17 11:38:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:38:59,741 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2021-12-17 11:38:59,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 11:38:59,741 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2021-12-17 11:38:59,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 11:38:59,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:38:59,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:38:59,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 11:38:59,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:38:59,961 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:38:59,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:38:59,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1505101988, now seen corresponding path program 1 times [2021-12-17 11:38:59,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:38:59,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377166207] [2021-12-17 11:38:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:59,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:38:59,972 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:38:59,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987677873] [2021-12-17 11:38:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:38:59,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:38:59,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:38:59,973 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:38:59,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 11:38:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:39:00,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 11:39:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:39:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 11:39:00,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:39:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 11:39:00,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:39:00,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377166207] [2021-12-17 11:39:00,162 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:39:00,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987677873] [2021-12-17 11:39:00,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987677873] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:39:00,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:39:00,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-12-17 11:39:00,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720782857] [2021-12-17 11:39:00,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:39:00,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 11:39:00,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:39:00,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 11:39:00,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:39:00,164 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 11:39:02,217 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:39:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:39:02,327 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2021-12-17 11:39:02,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:39:02,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-12-17 11:39:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:39:02,328 INFO L225 Difference]: With dead ends: 111 [2021-12-17 11:39:02,328 INFO L226 Difference]: Without dead ends: 91 [2021-12-17 11:39:02,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:39:02,329 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:39:02,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 128 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 11:39:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-17 11:39:02,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-17 11:39:02,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 76 states have internal predecessors, (88), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 11:39:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2021-12-17 11:39:02,336 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 31 [2021-12-17 11:39:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:39:02,336 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2021-12-17 11:39:02,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 11:39:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2021-12-17 11:39:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 11:39:02,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:39:02,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:39:02,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 11:39:02,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:39:02,553 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:39:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:39:02,554 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2021-12-17 11:39:02,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:39:02,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232092668] [2021-12-17 11:39:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:39:02,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:39:02,561 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:39:02,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799786835] [2021-12-17 11:39:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:39:02,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:39:02,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:39:02,564 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:39:02,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process Killed by 15